SP522/SP524. Low-Cost Programmable Multi-Protocol Transceivers

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1 LOOPBACK PATHS LOOPBACK PATHS LOOPBACK PATHS SP22/SP2 SP22 2 Drivers and 2 Receivers SP2 Drivers and Receivers Driver and Receiver Tri-State Control Low-Cost WAN Solution Loopback Function for Diagnostics Software Selectable Interface Modes: -RS-232 (V.28), RS-23 (V.) -RS-22 (V., X.2), RS-8 Low-Cost Programmable Multi-Protocol Transceivers DESCRIPTION The SP22/2 is a monolithic device that supports three serial interface standards for Wide Area Network Connectivity. The SP22/2 is ideally suited for multi-protocol designs that are cost and space sensitive. The SP22/2 is fabricated using a low power BiCMOS process technology. Two (2) drivers and two (2) receivers for the SP22 can be configured via software for any of the above interface modes at any time. The SP2 offers two (2) additional drivers and two (2) additional receivers. VDD V VDD V IN8 N8 VSS 8 DP0 7 DP TIN ENT T2IN ENT2 ROUT ENR 2 R2OUT 3 ENR2 VDD 2 T T2 SP22 DECODER LOGIC R R2 GND VSS 22 VSS TOUTA TOUTB 2 T2OUTA T2OUTB RINA 8 RINB 7 R2INA 20 R2INB LATCH_EN 2 LOOPBCK 23 3 DP0 32 DP 2 TIN 3 ENT 2 T2IN 3 ENT2 ROUT 0 ENR 3 R2OUT 3 ENR2 2 T3IN 3 ENT3 27 TIN 33 ENT 2 R3OUT 38 ENR3 ROUT 37 ENR VDD 28 2 T T2 SP2 DECODER LOGIC T3 T R R2 R3 R 2 VSS GND GND GND 2 2 LATCH_EN 30 LOOPBCK 23 TOUTA 22 TOUTB 20 T2OUTA 8 T2OUTB 7 RINA 3 RINB R2INA R2INB T3OUTA T3OUTB TOUTA TOUTB R3INA 7 R3INB 8 RINA RINB

2 SPECIFICATIONS 2 C and nominal supply voltages unless otherwise noted. MIN. TYP. MAX. UNITS CONDITIONS LOGIC INPUTS V IL 0.8 Volts V IH 2.0 Volts LOGIC OUTPUTS V OL 0. Volts I OUT = 3.2mA V OH 2. Volts I OUT =.0mA RS22 DRIVER TTL Input Levels V IL Volts V IH 2.0 Volts Outputs Differential Output Volts R=0Ω; see Figure Open Circuit Voltage,V O.0 Volts Balance 0. Volts V T V T Offset 3.0 Volts Short Circuit Current 0 ma V out = 0V Power Off Current 0 µa V cc = 0V, V out = 0.2V Transition Time 0 ns Rise/fall time, %-0% Max. Transmission Rate Mbps R L =0Ω Propagation Delay T A = 2 C t PHL 0 0 ns R DIFF =0Ω, Figures 3 & t PLH 0 0 ns R DIFF =0Ω, Figures 3 & RS22 RECEIVER TTL Output Levels V OL 0. Volts V OH 2. Volts Input High Threshold Volts (a)-(b) Low Threshold Volts (a)-(b) Common Mode Range Volts High Input Current Refer to Rec. input graph Low Input Current Refer to Rec. input graph Receiver Sensitivity 0.3 Volts V CM = 7V to -7V Input Impedance kω Max. Transmission Rate Mbps Propagation Delay T A = 2 C t PHL 0 7 ns Figures 3 & 7 t PLH 0 7 ns Figures 3 & 7 RS8 DRIVER TTL Input Levels V IL 0.8 Volts V IH 2.0 Volts Outputs Differential Output..0 Volts R=27Ω; C L =0pF; see Fig. Open Circuit Voltage,V O.0 Volts Balance 0.2 Volts V T V T Output Current 28.0 ma R L =Ω Short Circuit Current 200 ma V out = 7V to 7V Transition Time 0 ns Rise/fall time, %-0% Max. Transmission Rate Mbps R L =Ω Propagation Delay Figures 3 & ; T A = 2 C t PHL 0 0 ns R DIFF =Ω, C RL = 0pF t PLH 0 0 ns R DIFF =Ω, C RL = 0pF 2

3 SPECIFICATIONS 2 C and nominal supply voltages unless otherwise noted. MIN. TYP. MAX. UNITS CONDITIONS RS8 RECEIVER TTL Output Levels V OL 0. Volts V OH 2. Volts Input Common Mode Range Volts High Input Current Refer to Rec. input graph Refer to Rec. input graph Low Input Current Receiver Sensitivity ±0. Volts V CM = 2V to -7V Input Impedance 2 kω V CM = 2V to -7V Max. Transmission Rate Mbps Propagation Delay T A = 2 C t PHL 0 7 ns Figures 3 & 7 t PLH 0 7 ns Figures 3 & 7 RS232 DRIVER TTL Input Level V IL 0.8 Volts V IH 2.0 Volts Outputs High Level Output.0 Volts R L =3KΩ, V IN =0.8V Low Level Output Volts R L =3KΩ, V IN =2.0V Open Circuit Voltage - Volts Short Circuit Current 0 ma V out = 0V Power Off Impedance 300 Ω V cc = 0V, V out = ±2.0V Slew Rate 30 V/µs R L =3KΩ, C L =0pF, between 3V to 3V Transition Time. µs R L =3KΩ, C L =200pF Max. Transmission Rate 20 Kbps R L =3KΩ, C L =200pF Propagation Delay T A = 2 C t PHL 2 8 µs R L =3KΩ t PLH 2 8 µs R L =3KΩ RS232 RECEIVER TTL Output Levels V OL 0. Volts V OH 2. Volts Input High Threshold Volts Low Threshold Volts Receiver Open Circuit Bias 2.0 Volts Input Impedance 3 7 KΩ Max. Transmission Rate 20 Kbps Propagation Delay T A = 2 C t PHL 0.2 µs t PLH 0.2 µs RS23 DRIVER TTL Input Levels V IL 0.8 Volts V IH 2.0 Volts Output V DD = V, V SS = V High Level Output 3..0 Volts R L =0Ω, V T = 0.*V OC Low Level Output Volts R L =0Ω, V T = 0.*V OC Open Circuit Voltage.0.0 Volts Short Circuit Current 0 ma V OUT = 0V 3

4 SPECIFICATIONS (Continued) 2 C and nominal supply voltages unless otherwise noted. MIN. TYP. MAX. UNITS CONDITIONS RS-23 DRIVER Power Off Current ±0 µa V CC = 0V, V OUT = 0.2V Transition Time.0 µs Rise/fall time, -0% Max. Transmission Rate 20 Kbps R L =0Ω Propagation Delay T A = 2 C t PHL 2 8 µs R L =0Ω t PLH 2 8 µs R L =0Ω RS23 RECEIVER TTL Output Levels V OL 0 0. Volts V OH 2. Volts Input High Threshold Volts Low Threshold Volts Common Mode Range Volts High Input Current Refer to Rec. input graph Low Input Current Refer to Rec. input graph Receiver Sensitivity 0.3 Volts V CM = 7V to -7V Input Impedance KΩ V IN = V to -V Max. Transmission Rate 20 Kbps Propagation Delay T A = 2 C t PHL 0. µs t PLH 0. µs POWER REQUIREMENTS V CC Volts V DD..0. Volts V SS Volts I CC ma V CC = V; DP0=DP=0V I DD ma V DD = V; DP0=DP=0V I SS ma V SS = V; DP0=DP=0V ENVIRONMENTAL AND MECHANICAL Operating Temperature Range 0 70 C Storage Temperature Range - 0 C Package 2-pin SOIC, 2-pin SSOP, pin QFP RECEIVER INPUT GRAPHS V. RECEIVER 3.2mA RS8 RECEIVER.0mA V. RECEIVER 3.2mA V 3V 7V 3V V 3V 3.2mA 3V V Maximum Input Current versus Voltage 0.mA V 2V Unit Load Maximum Input Current versus Voltage 3.2mA 3V V Maximum Input Current versus Voltage

5 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. V CC...7V V DD...2V V SS... 2V Input Voltages Logic...-0.V to (V CC 0.V) Drivers...-0.V to (V CC 0.V) Receivers...±30V@ 0mA Outputs Voltages Logic...-0.V to (V CC 0.V) Drivers...V Receivers...-0.V to (V CC 0.V) Storage Temperature...- C to 0 C Power Dissipation mW OTHER AC CHARACTERISTICS 2 C and nominal supply voltages unless otherwise noted) PARAMETER MIN. TYP. MAX. UNITS CONDITIONS DRIVER DELAY TIME FROM ENABLE MODE TO TRI STATE MODE SINGLE ENDED MODE (RS-232, RS-23) t PZL ; Enable to Output low 00 ns 3KΩ pull up to output t PZH ; Enable to Output high 300 ns 3KΩ pull down to output t PLZ ; Disable from Output low 300 ns V to input t PHZ ; Disable from Output high 00 ns GND to input DIFFERENTIAL MODE (RS-22, RS-8) t PZL ; Enable to Output low 0 ns C L = 0pF, Fig. & ; S closed t PZH ; Enable to Output high 20 ns C L = 0pF, Fig. & ; S 2 closed t PLZ ; Disable from Output low 0 ns C L = pf, Fig. & ; S closed t PHZ ; Disable from Output high 0 ns C L = pf, Fig. & ; S 2 closed RECEIVER DELAY TIME FROM ENABLE MODE TO TRI STATE MODE SINGLE ENDED MODE (RS-232, RS-23) t PZL ; Enable to Output low 2 ns 3KΩ pull up to output t PZH ; Enable to Output high 20 ns 3KΩ pull down to output t PLZ ; Disable from Output low 0 ns V to input t PHZ ; Disable from Output high 0 ns GND to input DIFFERENTIAL MODE (RS-22, RS-8) t PZL ; Enable to Output low 2 ns C RL = pf, Fig. 2 & 8; S closed t PZH ; Enable to Output high 20 ns C RL = pf, Fig. 2 & 8; S 2 closed t PLZ ; Disable from Output low 0 ns C RL = pf, Fig. 2 & 8; S closed t PHZ ; Disable from Output high 0 ns C RL = pf, Fig. 2 & 8; S 2 closed

6 A R Receiver Test Point Output S K V CC V OD C RL K R V OC B S 2 Figure. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit 3V DI DE A B R DIFF C L C L2 A B RO pf Output Under Test C L 00 S V CC S 2 Figure 3. Driver/Receiver Timing Test Circuit Figure. Driver Timing Test Load #2 Circuit DRIVER INPUT DRIVER OUTPUT DIFFERENTIAL OUTPUT V A V B 3V 0V A B V O 0V V O f = MHz; t R < ns; t F < ns.v.v t PLH t PHL V /2V O O t SKEW t F t SKEW t R /2V O Figure. Driver Propagation Delays

7 3V f = MHz; t R < ns; t F < ns DE.V.V 0V t ZL t LZ V A, B 2.3V V OL Output normally LOW 0.V A, B V OH 0V 2.3V t ZH Output normally HIGH 0.V t HZ Figure. Driver Enable and Disable Times f = MHz; t R ns; t F ns V OD2 A B V OD2 0V INPUT 0V V OH RECEIVER OUT.V OUTPUT.V V OL t PHL t PLH Figure 7. Receiver Propagation Delays 3V RE.V f = MHz; t.v R < ns; t F < ns 0V t ZL t LZ V R.V Output normally LOW V 0.V IL R V IH 0V.V t ZH Output normally HIGH 0.V t HZ Figure 8. Receiver Enable and Disable Times 7

8 PINOUT (2-PIN SOIC & SSOP) ROUT LATCH_EN ENR2 ENT2 ENR ENT DP DP0 T2IN TIN TOUTA TOUTB SP R2OUT LOOPBCK VSS VDD R2INA R2INB RINA RINB T2OUTB T2OUTA GND PINOUT (-PIN QFP) SP GND RINA RINB R2INA R2INB R3INA R3INB RINA RINB TOUTB ENT DP DP0 LATCH_EN VSS VDD TIN TIN3 TIN2 TIN LOOPBCK GND TOUTA T3OUTB T3OUTA T2OUTB T2OUTA TOUTB GND TOUTA ROUT R2OUT R3OUT ROUT ENR ENR2 ENR3 ENR ENT ENT2 ENT3 8

9 FEATURES The SP22 and SP2 is a highly integrated serial transceiver that offers programmability between interface modes through software control. The SP22 and SP2 offers the hardware interface modes for RS-232 (V.28), RS-22A (V.), RS-23 (V.), and RS-8. The interface mode selection is done via two control pins. The SP22 contains two (2) independent drivers and two (2) independent receivers. The SP2 is basically two SP22 functions on one silicon, thus having four () drivers and four () receivers. The SP22/SP2 is ideally suited for low-cost wide area network connectivity and other multiprotocol applications. Based on our previous multi-mode SP00 family, Sipex has allocated specific transceiver cells or "building blocks" from the SP03 and created the SP22. The "building block" concept is that these small transceiver cells can be packaged to offer a simple low-cost solution to networking applications that need only two to four interface modes. The SP22 can be connected in series to build multiple channels needed for the specific application. Sipex has conveniently doubled the SP22 transceiver cell into the SP2 on a single silicon. For example in a 8- channel application requiring eight transceivers, the design can be implemented using two SP2 devices. The SP22 and SP2 can also be implemented in series with our SP00 family. An application needing -channels can use the SP0 containing seven (7) transceivers with the SP22. THEORY OF OPERATION The SP22 and SP2 are simply made up of the drivers, receivers, and decoder. The devices operate on three (3) power supplies; V CC at V, V DD at V, and V SS at V. Each of these circuit blocks are described in more detail below. Drivers The SP22 has two (2) enhanced independent drivers. Control for the mode selection is done via a two bit control word into DP0 and DP. The drivers are pre-arranged such that for each mode of operation, the relative position and functionality of the drivers are set up to accommodate the selected interface mode. As the mode of the drivers is changed, the electrical characteristics will change to support the required signal levels. The mode of each driver in the different interface modes that can be selected is shown in Figures to. There are three basic types of driver circuits RS-232, RS-23, and RS-8. The RS-232 drivers output single ended signals with a minimum of V (with 3KΩ and 200pF loading), and can operate up to 20Kbps. The RS-232 drivers are used in RS-232 mode for all signals, and also in V.3 mode where they are used as the control line signals such as DTR and RTS. The RS-23 drivers are also single ended signals with a minimum voltage output of 3.V (with 0Ω loading) and can operate up to 20Kbps. Open circuit V OL and V OH measurements are.0v to.0v when supplying V to V DD and V SS. The RS-23 drivers can be used in RS-, EIA-30, EIA- 30A and V.3 applications as Category II signals from each of their corresponding specifications. The third type of driver produces a differential signal that can maintain RS-8,.V differential output levels with a worst case load of Ω. The signal levels and drive capability of the RS-8 drivers allow the drivers to also support RS-22 (V.) requirements of 2V differential output levels with 0Ω loads. The RS-22 drivers can be used in RS-, EIA-30, EIA-30A and V.3 applications as Category I signals which are used for clock and data. The drivers also have separate enable pins which makes the SP22/SP2 helpful for half-duplex applications. The enable pins will tri-state the drivers when the ENT and ENT2 pins are at a logic low ("0"). For the SP2, ENT3 and ENT are used for the two additional drivers. During tri-stated conditions, the driver outputs will be at a high impedance state.

10 Unused driver inputs can be left floating; pull up resistors to V is internally connected on the inputs so that the output is at a logic low ("0"). For differential drivers, the non-inverting output will be at a logic high (""). Receivers The SP22 has two (2) independent receivers which can be programmed for the different interface modes. Control for the mode selection is done by DP0 and DP. Like the drivers, the receivers are pre-arranged for the specific requirements of the interface. As the operating mode of the receivers is changed, the electrical characteristics will change to support the required interface. Figures to show the mode of each receiver in the different interface modes that can be selected. There are three basic types of receiver circuits RS-232, RS-23, and RS-8. The RS-232 receiver is a single ended input with a threshold of 0.8V to 3.0V. The RS-232 receiver has an operating voltage range of V and can receive signals up to 20Kbps. The input sensitivity complies with EIA-RS-232 and V.28 at 3V to -3V. The input impedance is 3kΩ to 7kΩ. The RS-23 receivers are also single ended but have an input threshold as low as 300mV. The input impedance is guaranteed to be greater than KΩ, with an operating voltage range of 7V. The RS-23 receivers can operate up to 20Kbps. RS23 receivers can be used in RS-, EIA30, EIA-30A and V.3 applications as Category II signals as indicated by their corresponding specifications. The third type of receiver is a differential which supports RS-8. The RS-8 receiver has an input impedance of KΩ and a differential threshold of 300mV. Since the characteristics of an RS-22 (V.) receiver are actually subsets of RS-8, the receivers for RS-22 requirements are covered by the RS-8 receivers. RS-22 receivers are used in applications for RS-, EIA30, EIA-30A and V.3 as Category I signals for receiving clock, data, and some control line signals. The differential receivers can receive data up to Mbps. All receivers include a fail-safe feature that output a known logic state when the receiver inputs are unconnected. For single-ended RS-232 receivers, there are internal kω pulldown resistors on the inputs which produces a logic high ("") at the receiver outputs. The single-ended RS-23 receivers produce a logic low ("0") on the output when the inputs are open. This is due to a pull-up device connected to the input. The differential receivers have the same internal pull-up device on the non-inverting input which produces a logic high ("") at the receiver output. The receivers also have enable pins which allow for convenient half-duplex configurations. The receivers are tri-stated when the ENR and ENR2 pins are at a logic high (""). For the SP2, ENR3 and ENR are used for the additional two receivers. In addition to the separate enable lines on each transceiver, there is a latch enable pin, LATCH_EN, which is used for enabling and disabling the decoder control inputs (DP0, DP) and transceiver enable pins. This pin will default to a logic high ("") if not being used. Loopback The SP22 and SP2 contain a loopback feature that allows the driver outputs to "loopback" to the receiver inputs for diagnostic testing in the application. The loopback function is activated when the LOOPBCK pin is low. When in loopback mode, the driver outputs are tri-stated and the receiver inputs are deactivated. The receiver input impedance while in loopback will be a minimum of 2kΩ. The loopback function can be initiated during any mode of operation, RS-232, RS-23 or RS-22. The travel path of the transceivers in loopback is shown on Figure. The loopback function overrides the separate enable pins for the drivers or receivers. When LOOPBCK is at a logic low ("0"), the device will be configured in loopback regardless whether the transceiver is enabled or disabled. If the loopback function is not required, the LOOPBCK pin will default to a logic high ("") state.

11 LOOPBACK PATHS LOOPBACK PATHS LOOPBACK PATHS VDD IN8 V VSS VDD N8 V VDD VSS VDD 2 VSS 22 VSS 3 DP0 32 DP SP2 DECODER LOGIC LATCH_EN 30 LOOPBCK 23 8 DP0 7 DP TIN ENT T2IN ENT2 ROUT ENR 2 R2OUT 3 ENR2 SP22 DECODER LOGIC T T2 R R2 GND LATCH_EN 2 LOOPBCK 23 TOUTA TOUTB 2 T2OUTA T2OUTB RINA 8 RINB 7 R2INA 20 R2INB 2 TIN 3 ENT 2 T2IN 3 ENT2 ROUT 0 ENR 3 R2OUT 3 ENR2 2 T3IN 3 ENT3 27 TIN 33 ENT 2 R3OUT 38 ENR3 ROUT 37 ENR T T2 T3 T R R2 R3 R GND GND GND 2 2 TOUTA 22 TOUTB 20 T2OUTA 8 T2OUTB 7 RINA 3 RINB R2INA R2INB T3OUTA T3OUTB TOUTA TOUTB R3INA 7 R3INB 8 RINA RINB Figure. Typical Operating Circuit, SP22 and SP2

12 MODE: RS232 DRIVER RECEIVER DP0 DP DP0 DP 0 0 SP22 RINA (8) ROUT () R2INA (20) R2OUT (2) TIN () TOUTA () T2IN () T2OUTA () RECEIVERS DRIVERS SP2 RINA (3) ROUT () R2INA () R2OUT (3) R3INA (7) R3OUT (2) RINA () ROUT () TIN (2) TOUTA (22) T2IN (2) T2OUTA (8) T3IN (2) T3OUTA () TIN (27) TOUTA () RECEIVERS DRIVERS LATCH_EN LOOPBCK ENTX ENRX 0 Figure. Mode Diagram RS232 2

13 MODE: RS23 DRIVER RECEIVER DP0 DP DP0 DP SP22 RINA (8) ROUT () R2INA (20) R2OUT (2) TIN () TOUTA () T2IN () T2OUTA () RECEIVERS DRIVERS SP2 RINA (3) ROUT () R2INA () R2OUT (3) R3INA (7) R3OUT (2) RINA () ROUT () TIN (2) TOUTA (22) T2IN (2) T2OUTA (8) T3IN (2) T3OUTA () TIN (27) TOUTA () RECEIVERS DRIVERS LATCH_EN LOOPBCK ENTX ENRX 0 Figure. Mode Diagram RS23

14 MODE: RS22/8 DRIVER RECEIVER DP0 DP DP0 DP 0 0 SP22 RINA (8) ROUT () RINB (7) R2INA (20) R2OUT (2) R2INB () TIN () TOUTA () TOUTB (2) T2IN () T2OUTA () T2OUTB () RECEIVERS DRIVERS LATCH_EN LOOPBCK ENTX ENRX 0 Figure 2. Mode Diagram RS22/RS8 for the SP22

15 MODE: RS22/8 DRIVER RECEIVER DP0 DP DP0 DP 0 0 SP2 RINA (3) ROUT () RINB () R2INA () R2OUT (3) R2INB () R3INA (7) R3OUT (2) R3INB (8) RINA () ROUT () RINB () TIN (2) TOUTA (22) TOUTB (20) T2IN (2) T2OUTA (8) T2OUTB (7) T3IN (2) T3OUTA () T3OUTB () TIN (27) TOUTA () TOUTB () RECEIVERS DRIVERS LATCH_EN LOOPBCK ENTX ENRX 0 Figure. Mode Diagram RS22/RS8 for the SP2

16 APPLICATIONS INFORMATION DCE-DTE Applications A serial port can be easily configured for DTE and DCE using multiple SP22 and/or SP2 parts. As shown on Figure, the transceivers are half-duplexed to provide convenient DCE- DTE capability. The driver outputs are connected to the receiver inputs with only one pair out to the serial port for each driver/receiver. When the driver is tri-stated by applying a logic low ("0") to ENT, the receivers can be active to receive the appropriate input. The driver output during tri-state is high impedance, therefore will not degrade the signal levels of the receiver input signal. When the receiver is tri-stated by applying a logic ("") to ENR, the driver output is active to drive the appropriate signal without interference from the receiver. The receiver inputs are at least 2kΩ to ground during tri-state. Configuring Additional Multi-Protocol Transceivers Serial ports usually can have two data signals (SD, RD), three clock signals (TT, ST, RT), and at least eight control signals (CS, RS, etc.). EIA-RS- contains twenty six signal types including for a DB-37 connector. A DB-37 serial port design may require thirteen drivers and fourteen receivers. Although many applications do not use all these signals, some applications may need to support extra functions such as diagnostics. Sipex's SP0 supports enough transceivers for the primary channels of data, clock and control signals. Configuring LL, RL and TM may require two additional drivers and one receiver if designing for a DTE (one driver and two receivers for a DCE). The SP22 and SP2 is a convenient solution in a design that requires two extra single ended or differential transceivers. The SP0 and SP22, shown in Figure, can be programmed in various configurations. The SP0 is programmed for RS- mode. By connecting the decoder pins of the SP0 to the DP0 and DP pins accordingly, the SP22 is programmed in RS-23 mode. This adds two single ended transceivers to the application. For applications needing more than five RS-22 transceivers or more than three RS-23 transceivers, the SP0 can be programmed to RS-22 whereas a SP2 can be added and programmed to RS-23, thus creating seven RS-22 channels and four RS-23 channels. The SP0 and the SP22/ SP2 can be configured to custom fit the various serial port application needs. V Only Operation Using the SP782 The SP22 and SP2 use external V or V voltage supplies for power to maintain the RS-232 and RS-23 voltage levels, respectively. However, if a low-cost V solution if preferred, the SP22 and SP2 can be configured with the SP782 or SP78 programmable charge pump. The Sipex patent-pending programmable charge pumps offer V or V outputs. The programmability is used for switching from RS-232 using the V outputs to RS-23 using the V outputs. The SP782 requires 0.µF capacitors and the SP78 requires capacitors for the charge pump. Please refer to the SP782 and SP78 data sheet for details on the programmable charge pump. Achieving V with 2V Supplies Since the SP22 and SP2 use external V supplies, systems that have 2V supplies must be regulated down to V. This can be simply configured by placing diodes in series with the V DD and V SS lines. The absolute maximum supply voltage is 2V. Since most 2V power supplies have some voltage tolerances, usually %, any increase above the 2V maximum will damage the device. However, the 2V supply may be used providing that the maximum supply voltages do not exceed the rated absolute maximum V SS and V DD. Sequencing of Power Supplies Power Supplies for the SP22 and SP2 must be sequenced. The recommended sequence is V CC first, V DD 0-80µSec later and V SS 0 to,000µsec after V DD. There are no sequencing requirements for the SP22 or SP2 when they are powered from either the SP782 or SP78 charge pump devices or from the V DD and V SS supply pins of the SP0 or SP0 charge pump powered devices. For further details, see the application note, V DD, V CC and V SS Power Supply Sequencing.

17 V V 2 7 V CC V DD 22 DP V SS 8 DP0 SP22 2 LATCH_EN LOOPBCK GND V V V V CC V DD 2 DP V SS 3 DP0 SP2 30 LATCH_EN LOOPBCK 23 GND GND GND 2 2 V Figure. DTE/DCE Application with the SP22 and SP2 7

18 RS- Mode V N8 22µF 22µF 22µF various supply pins V CC V DD C C- C2 C µF V SS Drivers Receivers 0 0 TxD DTR RTS TxC ST 22 RL 7 LL 2 RxD RxC 20 CTS 80 DSR 78 DCD RI 2 SCT 7 2 TDEC0 TDEC TDEC2 TDEC3 V SP0CF RDEC0 2 RDEC 3 RDEC2 RDEC3 see pinout diagram for various ground pins V 7 V CC DP 2 V DD 22 V SS 8 DP0 SP22 2 LATCH_EN Tied to TDEC0 Tied to TDEC V DB-37 Connector CIRCUIT CIRCUITNAME CIRCUIT CIRCUIT MNEMONIC DIRECTION TYPE SG SIGNAL GROUND COMMON SC SENDCOMMON TO DCE RC RECEIVECOMMON FROMDCE IS TERMINAL IN SERVICE TO DCE IC INCOMING CALL FROMDCE TR TERMINAL READY TO DCE DM DATAMODE FROMDCE SD SEND DATA TO DCE RD RECEIVE DATA FROMDCE TT TERMINAL TIMING TO DCE ST SEND TIMING FROMDCE RT RECEIVE TIMING FROMDCE RS REQUEST TO SEND TO DCE CS CLEAR TO SEND FROMDCE RR RECEIVER READY FROM DCE SQ SIGNAL QUALITY FROMDCE NS NEW SIGNAL TO DCE SF SELECTFREQUENCY TO DCE SR SIGNAL RATE SELECTOR TO DCE SI SIGNAL RATE INDICATOR FROMDCE SSD SECONDARY SEND DATA TO DCE SRD SECONDARYRD FROMDCE SRS SECONDARYRS TO DCE SCS SECONDARYCS FROMDCE SRR SECONDARYRR FROMDCE LL LOCAL LOOPBACK TO DCE RL REMOTELOOPBACK TO DCE TM TEST MODE FROM DCE SS SELECT STANDBY TO DCE SB STANDBY INDICATOR FROMDCE RS- Interchange Circuits Table CONTROL DATA TIMING CONTROL DATA CONTROL CONTROL CONTROL PRIMARY CHANNEL SECONDARY CHANNEL RS-23 Outputs LOOPBCK GND RS-23 Inputs Figure. Adding extra channels using the SP22 and SP0 8

19 PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE) E H D A Ø e B A L DIMENSIONS (Inches) Minimum/Maximum (mm) A A B D E e H L Ø 2 PIN 0.03/0. (2.32/2.) 0.00/0.02 (0.2/0.300) 0.0/0.020 (0.330/0.08) 0./0. (.20/.) 0.2/0.2 (7.02/7.00) 0.00 BSC (.270 BSC) 0.3/0. (.00/.) 0.0/0.00 (0.0/.270) 0 /8 (0 /8 )

20 PACKAGE: PLASTIC SHRINK SMALL OUTLINE (SSOP) E H D A Ø e B A L DIMENSIONS (Inches) Minimum/Maximum (mm) A A B D E e H L Ø 2 PIN 0.08/0.078 (.73/.) 0.002/0.008 (0.0/0.2) 0.0/0.0 (0.2/0.38) 0.37/0.328 (8.07/8.33) 0.20/0.22 (.20/.38) 0.02 BSC (0. BSC) 0.30/0.3 (7./7.0) 0.022/0.037 (0./0.) 0 /8 (0 /8 ) 20

21 PACKAGE: Pin MQFP D D D2 0.30" RAD. TYP. c 0.20" RAD. TYP. CL -A- E -B- E2 E 0 MIN CL -D- L - A2 b e A A Seating Plane L DIMENSIONS Minimum/Maximum (mm) SYMBOL A A A2 b D D D2 E E E2 e N PIN MQFP JEDEC MS-022 (AB) Variation MIN NOM MAX BSC.00 BSC 8.00 REF.20 BSC.00 BSC 8.00 REF 0.80 BSC COMMON DIMENTIONS SYMBL MIN NOM MAX c L L.0 BASIC PIN MQFP (MS-022 BC) 2

22 PACKAGE: Pin LQFP D D 0.2 RAD. MAX. c 0.08 RAD. MIN. Pin - CL E E 0 Min 0 7 CL -D- L L - A2 b e A A Seating Plane DIMENSIONS Minimum/Maximum (mm) SYMBOL A A A2 b D D e E E N PIN LQFP JEDEC MS-02 (BCB) Variation MIN NOM MAX BSC.00 BSC 0.80 BSC 2.00 BSC.00 BSC COMMON DIMENTIONS SYMBL MIN NOM MAX c L L.00 BASIC PIN LQFP 22

23 ORDERING INFORMATION Model Temperature Range Package Types SP22CT... 0 C to 70 C... 2-pin SOIC SP22CA... 0 C to 70 C... 2-pin SSOP SP2CF... 0 C to 70 C... -pin MQFP SP2CM... 0 C to 70 C... -pin LQFP Please consult the factory for pricing and availability on a Tape-On-Reel option. The SP22 is obsolete. Suggested upgrade is SP322. The SP2 is not recommended for new designs. Suggested upgrade is SP2. Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 03 TEL: (08) FAX: (08) Sales Office 22 Linnell Circle Billerica, MA 082 TEL: (78) FAX: (78) sales@sipex.com Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. 23