MAX3316EAE -40 C to +85 C 16 SSOP C BYPASS CMOS INPUT CMOS OUTPUT. AutoShutdown Plus MAX3316. Maxim Integrated Products 1

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1 -; Rev ; /.V, µa, kbps, RS--Compatible Transceivers General Description The MA MA transceivers have a proprietary low-dropout transmitter output stage enabling RS-- compatible performance from +.V to +.V with a dual-charge pump. These devices require only four capacitors, and are guaranteed to operate at data rates up to kbps. The MA/MA achieve a µa supply current using Maxim s revolutionary AutoShutdown Plus feature. These devices automatically enter a low-power shutdown mode when the RS- cable is disconnected or the transmitters of the connected peripherals are inactive for more than seconds. They turn on again when they sense a valid transition at any transmitter or receiver input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system. The MA is a -Tx/-Rx device while the MA is a -Tx/-Rx device. These devices also feature a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. The MA/MA are -Tx/-Rx transceivers. The MA features a µa shutdown mode that can be entered by driving SHDN low. The MA s receivers remain active while in shutdown mode, allowing external devices such as modems to be monitored using only µa supply current. These devices are available in space-saving packages: MA (-pin SSOP and -pin TSSOP), MA/ MA (-pin SSOP and -pin TSSOP), and MA (-pin SSOP). Applications Palmtop Computers Hand-Held Instruments Pagers Cellular Phones GPS Handy Terminals Hand-Held Electronic Books AutoShutdown Plus is a trademark of Maxim Integrated Products. Pin Configurations appear at end of data sheet. Features AutoShutdown Plus (MA/MA) µa Operating Supply Current µa Low-Power Shutdown with Receivers Guaranteed kbps Data Rate Guaranteed V/µs Slew Rate RS- Compatible Down to.v C BYPASS C C +.V CMOS INPUT CMOS OUTPUT C+ C- C- C+ TIN ROUT READY FORCEON Ordering Information PART TEMP. RANGE PIN-PACKAGE MACUP C to + C TSSOP MACAE C to + C SSOP MAEUP - C to + C TSSOP MAEAE - C to + C SSOP Ordering Information continued at end of data sheet. Typical Application Circuits MA AutoShutdown Plus TOUT k RIN INVALID FORCEOFF C C RS-- COMPATIBLE OUTPUT RS-- COMPATIBLE INPUT TO POWER- MANAGEMENT UNIT Typical Application Circuits continued at end of data sheet. Selector Guide MA MA PART NO. OF DRIVERS/ RECEIVERS GUARANTEED DATA RATE (kbps) READY OUTPUT SHUTDOWN AutoShutdown Plus MA / MA / MA MA / / Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at ---, or visit Maxim s website at

2 .V, µa, kbps, RS--Compatible Transceivers MA MA ABSOLUTE MAIMUM RATINGS to...-.v to +V to (Note )...-.V to +V to (Note )...-V to +.V + (Note )...+V Input Voltages T_IN, EN, SHDN, FORCEON, FORCEOFF to...-.v to +V R_IN to...±v Output Voltages T_OUT to...±.v R_OUT, INVALID, READY to...-.v to ( +.V) Note : and can have maximum magnitudes of V, but their absolute difference cannot exceed V. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Short-Circuit Duration, T_OUT to...continuous Continuous Power Dissipation (T A = + C) -Pin SSOP (derate.mw/ C above + C)...mW -Pin SSOP (derate.mw/ C above + C)...mW -Pin TSSOP (derate.mw/ C above + C)...mW Operating Temperature Ranges MA_C... C to + C MA_E...- C to + C Storage Temperature Range...- C to + C Die Temperature...+ C Lead Temperature (soldering, s)...+ C ( = +.V to +.V, C C =, T A = T MIN to T MA, unless otherwise noted. Typical values are at = +.V, T A = + C.) PARAMETER SYMBOL CONDITIONS MIN TYP MA UNITS DC CHARACTERISTICS ( = +.V, T A = + C) AutoShutdown Plus Supply Current SHDN =, no load (MA), Supply Current FORCEON = FORCEOFF =, no load. ma (MA/MA) LOGIC INPUTS Input Logic Threshold Low T_IN, EN, SHDN, FORCEON, FORCEOFF. V Input Logic Threshold High T_IN, EN, SHDN, FORCEON, FORCEOFF. V Transmitter Input Hysteresis. V Input Leakage Current T_IN, EN, SHDN, FORCEON, FORCEOFF ±. ± µa RECEIVER OUTPUTS Output Leakage Current EN = (MA), receivers disabled ±. ± µa Output Voltage Low I OUT =.ma. V Output Voltage High I OUT = -.ma. V RECEIVER INPUTS Input Voltage Range - + V Input Threshold Low T A = + C. V Input Threshold High T A = + C. V Input Hysteresis. V Input Resistance T A = + C kω TRANSMITTER OUTPUTS FORCEON =, FORCEOFF =, all R_IN idle, all T_IN idle (MA/MA) µa SHDN = (MA), FORCEOFF = Shutdown Supply Current µa (MA/MA) All transmitter outputs loaded with kω to Output Voltage Swing ±. ± V ground

3 .V, µa, kbps, RS--Compatible Transceivers ELECTRICAL CHARACTERISTICS (continued) ( = +.V to +.V, C C =, T A = T MIN to T MA, unless otherwise noted. Typical values are at = +.V, T A = + C.) PARAMETER SYMBOL CONDITIONS MIN TYP MA UNITS Output Resistance =, transmitter output = ±V M Ω Output Short-Circuit Current ± ± ma V Output Leakage Current CC = or.v to.v, V OUT = ±V, ± µa transmitters disabled AutoShutdown Plus (FORCEON =, FORCEOFF = ) (MA/MA) Receiver Input Threshold to Positive threshold Figure a INVALID Output High Negative threshold Receiver Input Threshold to INVALID Output Low INVALID, READY Output Voltage Low INVALID, READY Output Voltage High Receiver Positive or Negative Threshold to INVALID High Receiver Positive or Negative Threshold to INVALID Low Receiver or Transmitter Edge to Transmitters Enabled Receiver or Transmitter Edge to Transmitters Shutdown t INVL Figure b µs t WU Figure b (Note ) µs t AUTO- SHDN Figure a I OUT =.ma I OUT = -.ma =.V, Figure b (Note ) V s V. V. V t INVH Figure b µs MA MA TIMING CHARACTERISTICS ( = +.V to +.V, C C =, T A = T MIN to T MA, unless otherwise noted. Typical values are at = +.V, T A = + C.) Maximum Data Rate Receiver Propagation Delay Receiver Output Enable Time Receiver Output Disable Time Transmitter Skew Receiver Skew PARAMETER SYMBOL CONDITIONS R L = kω, C L = pf, one transmitter switching t PHL. R_IN to R_OUT, C L = pf t PLH. µs Normal operation (MA) ns Normal operation (MA) ns t PHL - t PLH (Note ) ns t PHL - t PLH MIN TYP MA UNITS kbps ns

4 .V, µa, kbps, RS--Compatible Transceivers MA MA TIMING CHARACTERISTICS (continued) ( = +.V to +.V, C C =, T A = T MIN to T MA, unless otherwise noted. Typical values are at = +.V, T A = + C.) PARAMETER SYMBOL CONDITIONS MIN TYP MA UNITS Transition-Region Slew Rate Typical Operating Characteristics ( = +.V, C C =, kbps data rate, all transmitters loaded with kω, T A = + C, unless otherwise noted.) SUPPLY CURRENT (ma) MA/MA SUPPLY CURRENT vs. SUPPLY VOLTAGE kbps kbps kbps T TRANSMITTING AT SPECIFIED DATA RATE T TRANSMITTING AT kbps C L = pf (V) =.V, T A = + C, R L = kω to kω, one transmitter switching, measured from +V to -V or -V to +V, C L = pf to pf MA TOC TRANSMITTER OUTPUT VOLTAGE (V) MA/MA TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE T_OUT+ T TRANSMITTING AT kbps T TRANSMITTING AT kbps C L = pf T_OUT (V) Note : A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds. Note : Transmitter skew is measured at the transmitter zero crosspoints. MA TOC V/µs TRANSMITTER OUTPUT VOLTAGE (V) MA/MA TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE T_OUT+ T TRANSMITTING AT kbps T TRANSMITTING AT kbps T_OUT- MA TOC SLEW RATE (V/µs) MA/MA SLEW RATE vs. LOAD CAPACITANCE FOR DATA RATES UP TO kbps -SLEW +SLEW MA TOC - LOAD CAPACITANCE (pf) LOAD CAPACITANCE (pf)

5 .V, µa, kbps, RS--Compatible Transceivers Typical Operating Characteristics (continued) ( = +.V, C C =, kbps data rate, all transmitters loaded with kω, T A = + C, unless otherwise noted.) SUPPLY CURRENT (ma) MA/MA OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE T TRANSMITTING AT SPECIFIED DATA RATE T TRANSMITTING AT kbps kbps kbps kbps LOAD CAPACITANCE (pf) MA TOC SUPPLY CURRENT (ma) MA/MA SUPPLY CURRENT vs. SUPPLY VOLTAGE kbps kbps kbps T TRANSMITTING AT SPECIFIED DATA RATE T TRANSMITTING AT kbps C L = pf (V) MA TOC TRANSMITTER OUTPUT VOLTAGE (V) MA/MA TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE T_OUT+ T TRANSMITTING AT kbps T TRANSMITTING AT kbps C L = pf T_OUT (V) MA TOC MA MA TRANSMITTER OUTPUT VOLTAGE (V) MA/MA TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE T_OUT+ T TRANSMITTING AT kbps T TRANSMITTING AT kbps T_OUT- MA TOC SLEW RATE (V/µs) MA/MA SLEW RATE vs. LOAD CAPACITANCE -SLEW +SLEW FOR DATA RATES UP TO kbps MA TOC SUPPLY CURRENT (ma) MA/MA OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE T TRANSMITTING AT SPECIFIED DATA RATE T TRANSMITTING AT kbps kbps kbps kbps MA TOC LOAD CAPACITANCE (pf) LOAD CAPACITANCE (pf) LOAD CAPACITANCE (pf)

6 .V, µa, kbps, RS--Compatible Transceivers MA MA Typical Operating Characteristics (continued) ( = +.V, C C =, kbps data rate, all transmitters loaded with kω, T A = + C, unless otherwise noted.) TRANSMITTER SKEW (ns) TRANSMITTER SKEW vs. LOAD CAPACITANCE ( t PLH - t PHL ) T TRANSMITTING AT kbps T TRANSMITTING AT kbps MA/MA MA/MA LOAD CAPACITANCE (pf) MAE TOC READY TURN-ON TIME (µs) MA/MA READY TURN-ON TIME vs. TEMPERATURE - - TEMPERATURE ( C) MAE TOC READY TURN-OFF TIME (ns) MA/MA READY TURN-OFF TIME vs. TEMPERATURE - - TEMPERATURE ( C) MAE TOC Pin Description PIN MA SSOP TSSOP MA SSOP/ TSSOP MA SSOP/ TSSOP MA SSOP NAME FUNCTION C+ Positive Terminal of Voltage-Doubler Charge- Pump Capacitor + Generated by the Charge Pump C- Negative Terminal of Voltage-Doubler Charge- Pump Capacitor C+ Positive Terminal of Inverting Charge-Pump Capacitor C- Negative Terminal of Inverting Charge-Pump Capacitor - Generated by the Charge Pump,,,, T_OUT RS- Transmitter Outputs,,,, R_IN RS- Receiver Inputs,,,, R_OUT CMOS Receiver Outputs,,,, T_IN CMOS Transmitter Inputs Ground +.V to +.V Single-Supply Voltage EN Receiver Enable, Low,,,, N.C. No Connection

7 .V, µa, kbps, RS--Compatible Transceivers MA SSOP TSSOP PIN MA SSOP/ TSSOP MA SSOP/ TSSOP MA SSOP NAME SHDN READY INVALID FORCEON FORCEOFF Pin Description (continued) FUNCTION Shutdown Control, Low Ready to Transmit Output, High. READY is enabled high when goes below -.V and the device is ready to transmit. Valid Signal Detector Output, Low. A logic high indicates that a valid RS- level is present on a receiver input. Force-On Input, High. Drive high to override AutoShutdown Plus, keeping transmitters and receivers on (FORCEOFF must be high) (Table ). Force-Off Input, Low. Drive low to shut down transmitters, receivers, and charge pump. This overrides AutoShutdown Plus and FORCEON (Table ). MA MA Detailed Description Dual Charge-Pump Voltage Converter The MA MAs internal power supply consists of a regulated dual charge pump that provides output voltages of +.V (doubling charge pump) and -.V (inverting charge pump), over the +.V to +.V input voltage range. The charge pump operates in discontinuous mode: if the output voltages are less than.v, the charge pump is enabled; if the output voltages exceed.v, the charge pump is disabled. Each charge pump requires a flying capacitor (C, C) and a reservoir capacitor (C, C) to generate the and supplies. The READY output (MA/MA) is low when the charge pumps are disabled in shutdown mode. The READY signal asserts high when goes below -.V. RS--Compatible Transmitters The MA MAs transmitters are inverting level translators that convert CMOS-logic levels to RS--compatible voltage levels. They guarantee a kbps data rate with worst-case loads of kω in parallel with pf, providing compatibility with PC-to-PC communication software (such as LapLink ). The MA s transmitters are turned off (high impedance) when SHDN is asserted low, putting the device in shutdown mode. The MA/MAs transmitters are turned off (high impedance) when FORCEOFF is asserted low, or when the AutoShutdown Plus circuitry senses that all receiver and transmitter inputs are inactive for more than seconds. The transmitter outputs can be driven to ±V when power is off. The transmitter inputs do not have internal pullup resistors. Connect unused inputs to or. Figure a shows an RS--compatibility circuit and Figure b shows MA MA transmitter output compatibility with an RS- receiver. RS- Receivers The MA MAs receivers convert RS- signal levels into CMOS-logic output levels. The receivers are rated to receive signals up to ±V. The MA/MA/MAs receivers feature inverting outputs that always remain active (Table ). The MA s receivers have inverting, three-state outputs. In shutdown, the receivers can be active or inactive (Table ). The MA/MA feature an INVALID output that is asserted low when no valid RS- voltage levels have been detected on all receiver inputs. Because INVALID indicates the receiver s input condition, it is independent of the states of FORCEON and FORCEOFF. LapLink is a trademark of Traveling Software.

8 .V, µa, kbps, RS--Compatible Transceivers MA MA Table. Output Control Truth Table (MA/MA) OPERATION STATUS Shutdown (Forced Off) Normal Operation (Forced On) Normal Operation (AutoShutdown Plus) Shutdown (AutoShutdown Plus) FORCEON FORCEOFF Normal Operation INVALID* Normal Operation INVALID* VALID RECEIVER LEVEL Yes RECEIVER OR TRANSMITTER EDGE WITHIN s Yes No Yes T_OUT High-Z High-Z R_OUT Shutdown INVALID* No No High-Z Normal Operation (AutoShutdown) INVALID** INVALID** Yes Shutdown (AutoShutdown) INVALID** INVALID** No High-Z = Don t care *INVALID connected to FORCEON **INVALID connected to FORCEON and FORCEOFF Table. Shutdown and Enable Control Truth Table (MA) SHDN EN T_OUT R_OUT High-Z High-Z High-Z High-Z MA Shutdown Mode Supply current falls to less than µa in shutdown mode (SHDN = low). When shut down, the device s charge pumps are turned off, is pulled down to, is pulled to ground, and the transmitter outputs are disabled (high impedance). The time required to exit shutdown is typically µs, as shown in Figure. Connect SHDN to if the shutdown mode is not used; SHDN has no effect on R_OUT. MA/MA AutoShutdown Plus Mode Maxim s AutoShutdown Plus feature on the MA/ MA allows the supply current to fall to µa. These devices will enter the AutoShutdown Plus mode if FORCEOFF is high, FORCEON is low, and they do not sense a valid signal transition on any receiver or transmitter input for seconds. This may occur if the RS- cable is disconnected or if the peripheral transmitters are turned off, and the UART driving the transmitter inputs is inactive. The system turns on again when a valid transition is applied to any RS- receiver or transmitter input. As a result, the system saves power without changes to the existing BIOS or operating system. Figure a depicts valid and invalid RS- receiver voltage levels. INVALID indicates the receiver input s condition and is independent of FORCEON and FORCEOFF states. Figure and Table summarize the operating modes of the MA/MA. FORCEON and FORCEOFF override AutoShutdown Plus circuitry. When neither control is asserted, the IC selects between these states automatically, based on the last receiver or transmitter edge received.

9 .V, µa, kbps, RS--Compatible Transceivers C C +.V C BYPASS C+ C+ T_ IN R_ OUT MA MA MA MA T_ OUT R_ IN C C L pf C R T +V C- C- RS-- COMPLIANT TRANSCEIVER MA MA Figure a. RS--Compatibility Circuit V/div V/div T IN MA MA T OUT MA MA V/div V/div OR SHDN (MA) FORCEOFF (MA/MA) T V/div RS--COMPLIANT RECEIVER OUTPUT T µs/div Figure b. MA MA Transmitter Output Compatibility with an RS- Receiver Figure. Transmitter Outputs when Exiting Shutdown or Powering Up

10 .V, µa, kbps, RS--Compatible Transceivers MA MA When shut down, the device s charge pumps turn off, is pulled to, is pulled to ground, the transmitter outputs are high impedance, and READY is driven low. The time required to exit shutdown is typically µs (Figure ). By connecting FORCEON to INVALID, the MA/ MA shut down when no valid receiver level is detected and wake up when a valid receiver level is detected. A system with AutoShutdown Plus may need time to wake up. Figure shows a circuit that forces the transmitters on for ms, allowing enough time for the other system to realize that the MA/MA is awake. If the other system outputs valid RS- signal transitions within that time, the RS- ports on both systems remain enabled. Connecting to the PC (MA/MA) If direct software control is desired, use INVALID to indicate DTR or ring indicator (RI) signal. This can be used to connect a hand-held device to a PC. One example is using the hot sync function on a personal digital assistant (PDA). The transmitter and receiver signals (T_OUT and R_IN) are used for communication, while INVALID causes a change of state on RI. The change of state on RI will trigger an interrupt on the PC and allow communication to begin between the device and the PC. This eliminates the need for the PC to poll constantly the receiver or transmitter lines to determine if the device is connected. Applications Information RS--Compatible Operation The MA MA do not meet EIA- requirements for transmitter output voltage levels. EIA- compliance specifies transmitter output voltage swings of ±V when loaded with kω and pf. The receiver inputs are fully EIA- compliant. The MA MA will function properly with most modern RS- interfaces. This allows RS--compatible communication in low-voltage systems without the added expense of a voltage tripler or switched-mode power supply. +.V R_IN -.V µs TIMER R INVALID INVALID ASSERTED IF ALL RECEIVER INPUTS ARE BETWEEN +.V AND -.V FOR AT LEAST µs. Figure a. INVALID Functional Diagram, INVALID Low +.V R_IN -.V µs TIMER R INVALID INVALID DEASSERTED IF ANY RECEIVER INPUT HAS BEEN BETWEEN +.V AND -.V FOR LESS THAN µs. Figure b. INVALID Functional Diagram, INVALID High RECEIVER INPUT LEVELS +.V +.V -.V -.V INVALID HIGH INDETERMINATE INVALID LOW INDETERMINATE INVALID HIGH Figure a. Receiver Positive/Negative Thresholds for INVALID Capacitor Selection The capacitor type used for C C is not critical for proper operation; polarized or nonpolarized capacitors can be used. The charge pump requires capacitors. Increasing the capacitor values (e.g., by a factor of ) reduces ripple on the transmitter outputs and slightly reduces power consumption. C, C, and C can be increased without changing C s value. However, do not increase C without also increasing the values of

11 .V, µa, kbps, RS--Compatible Transceivers INVALID OUTPUT READY OUTPUT RECEIVER INPUTS TRANSMITTER INPUTS TRANSMITTER OUTPUTS * t INVL t INVH t t AUTOSHDN AUTOSHDN t WU t WU } INVALID REGION MA MA *MA/MA Figure b. AutoShutdown Plus, INVALID, and READY Timing Diagram Transmitter Outputs when Exiting Shutdown Figure shows two transmitter outputs when exiting shutdown mode. As they become active, the two transmitter outputs are shown going to opposite RS-- compatible levels (one transmitter input is high, the other is low). Each transmitter is loaded with kω in par- POWER- MANAGEMENT UNIT MASTER SHDN LINE FORCEOFF FORCEON MA MA MΩ C, C, C, and C BYPASS to maintain proper ratios (C to other capacitors). When using the minimum-required capacitor values, make sure the capacitor value does not degrade excessively with temperature. If in doubt, use capacitors with a higher nominal value. The capacitor s equivalent series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on and. Power-Supply Decoupling In most circumstances, a bypass capacitor is adequate. In applications that are sensitive to powersupply noise, decouple to ground with a capacitor of the same value as charge pump capacitor C. Connect bypass capacitors as close to the IC as possible. Figure. AutoShutdown Plus Initial Turn-On to Wake Up a Mouse or Another System

12 .V, µa, kbps, RS--Compatible Transceivers MA MA allel with pf. The transmitter outputs display no ringing or undesirable transients as they come out of shutdown. Note that the transmitters are enabled only when the magnitude of exceeds approximately -V. High Data Rates The MA MA maintain RS--compatible ±.V minimum transmitter output voltage even at high data rates. Figure shows a transmitter loopback test circuit. Figure shows a loopback test result at kbps. For Figure, all transmitters were driven simultaneously at kbps into EIA/TIA- loads in parallel with pf. C BYPASS V/div T IN V/div T OUT R OUT V/div Figure. Loopback Test Result at kbps Ordering Information (continued) C C C+ C- C+ C- MA MA MA MA C* C PART TEMP. RANGE PIN-PACKAGE MACUP C to + C TSSOP MACAP C to + C SSOP MAEUP - C to + C TSSOP MAEAP - C to + C SSOP MACUP C to + C TSSOP MACAP C to + C SSOP T_ IN T_ OUT MAEUP - C to + C TSSOP MAEAP - C to + C SSOP R_ OUT R_ IN MACAE MAEAE C to + C - C to + C SSOP SSOP FORCEON** FORCEOFF** k C L pf TRANSISTOR COUNT: PROCESS: CMOS Chip Information *C CAN BE RETURNED TO OR. **MA/MA Figure. Loopback Test Circuit

13 MA MA.V, µa, kbps, RS--Compatible Transceivers Pin Configurations (continued) READY FORCEOFF TOUT FORCEON TIN INVALID ROUT MA SSOP C+ C- C- C+ RIN SHDN TOUT C- C+ EN RIN ROUT N.C. TIN TOUT C- C+ TIN N.C. ROUT RIN MA SSOP/TSSOP N.C. TOUT C- C+ N.C. RIN ROUT TIN TIN TOUT C- C+ ROUT N.C. N.C. RIN MA TSSOP C+ TOUT RIN ROUT TIN TIN ROUT MA SSOP C- C+ C- TOUT RIN FORCEOFF TOUT C- C+ READY RIN ROUT FORCEON TIN TOUT C- C+ TIN INVALID ROUT RIN MA SSOP/TSSOP TOP VIEW

14 .V, µa, kbps, RS--Compatible Transceivers MA MA C C CMOS INPUTS +.V C+ C- C+ C- TIN TIN MA TOUT TOUT C* C Typical Application Circuits (continued) RS-- COMPATIBLE OUTPUTS CMOS INPUTS +.V C+ C- C- C+ TIN TIN MA TOUT TOUT C* C RS-- COMPATIBLE OUTPUTS ROUT RIN ROUT RIN CMOS OUTPUTS ROUT k RIN RS-- COMPATIBLE INPUTS CMOS OUTPUTS ROUT k RIN RS-- COMPATIBLE INPUTS EN k k SHDN *C CAN BE RETURNED TO EITHER OR GROUND. CIRCUIT SHOWN IS FOR THE -PIN SSOP.

15 .V, µa, kbps, RS--Compatible Transceivers C BYPASS C C CMOS INPUTS CMOS OUTPUTS +.V C+ C- C- C+ TIN TIN ROUT ROUT Typical Application Circuits (continued) MA TOUT TOUT k RIN RIN C C RS--COMPATIBLE OUTPUTS RS--COMPATIBLE INPUTS MA MA k READY AutoShutdown Plus INVALID TO POWER- MANAGEMENT UNIT FORCEON FORCEOFF Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, San Gabriel Drive, Sunnyvale, CA -- Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

16 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MACAE+ MACAE+T MAEAE+ MAEAE+T MAEUP+ MAEUP+T MACUP+ MACUP+T MACUP+ MACUP+T MAEUP+ MAEUP+T MACAE+ MACAE+T MAEAE+ MAEAE+T