3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors

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1 AAILABLE MAX/MAX/ MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors General Description The MAX/MAX/MAX7/MAX traceivers have a proprietary low-dropout tramitter output stage enabling true RS- performance from a. to. supply with a dual charge pump. The devices require only four small.µf external chargepump capacitors. The MAX, MAX, and MAX are guaranteed to run at data rates of kbps while maintaining RS- output levels. The MAX7 is guaranteed to run at data rates of kbps in the normal operating mode and Mbps in the MegaBaud operating mode, while maintaining RS- output levels. The MAX/MAX have receivers and drivers. The MAX features a µa shutdown mode that reduces power coumption and extends battery life in portable systems. Its receivers remain active in shutdown mode, allowing external devices such as modems to be monitored using only µa supply current. The MAX and MAX are pin, package, and functionally compatible with the industry-standard MAX and MAX, respectively. The MAX is a complete serial port ( drivers/ receivers) designed for notebook and subnotebook computers. The MAX7 ( drivers/ receivers) is ideal for fast modem applicatio. Both these devices feature a shutdown mode in which all receivers can remain active while using only µa supply current. Receivers R (MAX7/MAX) and R (MAX) have extra outputs in addition to their standard outputs. These extra outputs are always active, allowing external devices such as a modem to be monitored without forward biasing the protection diodes in circuitry that may have CC completely removed. The MAX, MAX7, and MAX are available in space-saving TSSOP and SSOP packages. Applicatio Notebook, Subnotebook, and Palmtop Computers High-Speed Modems Battery-Powered Equipment Hand-Held Equipment Peripherals Printers Next Generation Device Features For Smaller Packaging: MAX8E/MAX9E: +. to +. RS- Traceivers in UCSP For Integrated ESD Protection: MAXE/MAXE/MAX7E/MAXE/ MAXE: ±k ESD-Protected, Down to na,. to., Up to Mbps, True RS- Traceivers For Low-oltage or Data Cable Applicatio: MAX8E/MAX8E: +. to +., µa, Tx/ Rx RS- Traceivers with ±k ESD-Protected I/O and Logic Pi Ordering Information PART TEMP RANGE PIN-PACKAGE +Denotes lead-free package. Ordering Information continued at end of data sheet. Pin Configuratio TOP IEW C+ C- C+ C- TOUT RIN MAX MAX 8 SHDN 7 TOUT RIN ROUT TIN TIN 9 ROUT PKG CODE MAXCUP+ C to +7 C TSSOP U+ MAXCAP+ C to +7 C SSOP A+ MAXCWN+ C to +7 C 8 SO W8+ MAXCPN+ C to +7 C 8 Plastic Dip P8+ * Typical Operating Circuits appear at end of data sheet. MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc. * DIP/SO Pin Configuratio continued at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at 9-7; Rev 7; /7

2 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors ABSOLUTE MAXIMUM RATINGS...-. to + (Note )...-. to +7 (Note )...+. to -7 + (Note )...+ Input oltages T_IN, SHDN,...-. to + MBAUD...-. to ( +.) R_IN...± Output oltages T_OUT...±. R_OUT...-. to ( +.) Short-Circuit Duration T_OUT...Continuous Continuous Power Dissipation (T A = +7 C) -Pin TSSOP (derate.7mw/ C above +7 C)...mW -Pin Narrow SO (derate 8.7mW/ C above +7 C)...9mW -Pin Wide SO (derate 9.mW/ C above +7 C)...7mW -Pin Plastic DIP (derate.mw/ C above +7 C)...8mW 8-Pin SO (derate 9.mW/ C above +7 C)...7mW 8-Pin Plastic DIP (derate.mw/ C above +7 C)..889mW -Pin SSOP (derate 7.mW/ C above +7 C)...9mW -Pin TSSOP (derate 8.mW/ C above +7 C)...mW 8-Pin TSSOP (derate 8.7mW/ C above +7 C)...9mW 8-Pin SSOP (derate 9.mW/ C above +7 C)...7mW 8-Pin SO (derate.mw/ C above +7 C)...W Operating Temperature Ranges MAX C... C to +7 C MAX E...- C to +8 C Storage Temperature Range...- C to + C Lead Temperature (soldering, s)...+ C Note : and can have a maximum magnitude of 7, but their absolute difference cannot exceed. 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 conditio beyond those indicated in the operational sectio of the specificatio is not implied. Exposure to absolute maximum rating conditio for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS ( = +. to +., C C =.µf (Note ), T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) PARAMETER CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS Power-Supply Current No load, =. or., T A = + C MAX/MAX/ MAX MAX7.... Shutdown Supply Current SHDN =, T A = + C. µa LOGIC INPUTS AND RECEIER OUTPUTS ma Input Logic Threshold Low (Note ) T_IN,, SHDN, MBAUD.8 Input Logic Threshold High (Note ) =. =... Input Leakage Current T_IN,, SHDN, MBAUD ±. ±. µa Output Leakage Current Receivers disabled ±. ± µa Output oltage Low I OUT =.ma. Output oltage High I OUT = -.ma RECEIER INPUTS Input oltage Range - Input Threshold Low T A = + C =. = Input Threshold High T A = + C =. =. = Maxim Integrated

3 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors ELECTRICAL CHARACTERISTICS (continued) ( = +. to +., C C =.µf (Note ), T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) PARAMETER Input Hysteresis Input Resistance TRANSMITTER OUTPUTS Output oltage Swing Output Resistance Output Short-Circuit Current Output Leakage Current MOUSE DRIEABILITY (MAX) T A = + C CONDITIONS All tramitter outputs loaded with kω to ground = = =, T OUT = ± OUT = ±, = or to., tramitters disabled MIN TYP MAX. 7 ±. ±. M ± ± ± UNITS kω Ω ma µa Tramitter Output oltage TIN = TIN =, TIN =, TOUT loaded with kω to, TOUT and TOUT loaded with.ma each ±. TIMING CHARACTERISTICS MAX/MAX/MAX ( = +. to +., C C =.µf (Note ), T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) PARAMETER CONDITIONS MIN TYP MAX UNITS Maximum Data Rate R L = kω, C L = pf, one tramitter switching kbps Receiver Propagation Delay R_IN to R_OUT, C L = pf t PHL t PLH.. µs Receiver Output Enable Time Normal operation Receiver Output Disable Time Tramitter Skew Receiver Skew Normal operation t PHL - t PLH t PHL - t PLH Traition-Region Slew Rate =., R L = kω to 7kΩ, + to - or - to +, T A = + C, one tramitter switching C L = pf to pf C L = pf to pf /µs Maxim Integrated

4 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors TIMING CHARACTERISTICS MAX7 ( = +. to +., C C =.µf (Note ), T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) PARAMETER CONDITIONS R L = kω, C L = pf, one tramitter switching, MBAUD = MIN TYP MAX UNITS Maximum Data Rate =. to., R L = kω, C L = pf, one tramitter switching, MBAUD = kbps Receiver Propagation Delay Receiver Output Enable Time Receiver Output Disable Time Tramitter Skew Receiver Skew Traition-Region Slew Rate =. to., R L = kω, C L = pf, one tramitter switching, MBAUD = R_IN to R_OUT, C L = pf Normal operation Normal operation t PHL - t PLH, MBAUD = t PHL - t PLH, MBAUD = t PHL - t PLH =., R L = Ω to 7kΩ, + to - or - to +, T A = + C C L = pf to pf Typical Operating Characteristics ( = +., kbps data rate,.µf capacitors, all tramitters loaded with kω, T A = + C, unless otherwise noted.) t PHL t PLH MBAUD = C L = pf to pf, MBAUD =.. MBAUD = Note : MAX/MAX/MAX: C C =.µf tested at. ±%; C =.7µF, C C =.µf tested at. ±%. MAX7: C C =.µf tested at. ±%; C C =.µf tested at. ±%; C =.7µF, C C =.µf tested at. ±%. Note : Tramitter input hysteresis is typically m. µs /µs TRANSMITTER OUTPUT OLTAGE () MAX/MAX TRANSMITTER OUTPUT OLTAGE vs. LOAD CAPACITANCE OUT + OUT - MAX- SLEW RATE (/µs) 8 8 MAX/MAX SLEW RATE vs. LOAD CAPACITANCE FOR DATA RATES UP TO kbps +SLEW -SLEW MAX- SUPPLY CURRT (ma) MAX/MAX SUPPLY CURRT vs. LOAD CAPACITANCE WH TRANSMITTING DATA kbps kbps kbps MAX- Maxim Integrated

5 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Typical Operating Characteristics (continued) ( = +., kbps data rate,.µf capacitors, all tramitters loaded with kω, T A = + C, unless otherwise noted.) TRANSMITTER OUTPUT OLTAGE () TRANSMITTER OUTPUT OLTAGE () SLEW RATE (/µs) MAX TRANSMITTER OUTPUT OLTAGE vs. LOAD CAPACITANCE TRANSMITTER AT kbps TRANSMITTERS AT kbps OUT + OUT - MAX7 TRANSMITTER OUTPUT OLTAGE vs. LOAD CAPACITANCE (MBAUD = ) TRANSMITTER AT kbps TRANSMITTERS AT kbps kω + C L LOADS =. MAX7 SLEW RATE vs. LOAD CAPACITANCE (MBAUD = ) -SLEW, Mbps +SLEW, Mbps -SLEW, Mbps +SLEW, Mbps TRANSMITTER AT FULL DATA RATE TRANSMITTERS AT / DATA RATE kω + C L LOAD EACH OUTPUT =. MAX- MAX-7 MAX- SLEW RATE (/µs) TRANSMITTER OUTPUT OLTAGE () SUPPLY CURRT (ma) MAX SLEW RATE vs. LOAD CAPACITANCE -SLEW +SLEW ALL OUTPUTS LOADED WITH kω +C L.µF CHARGE-PUMP CAPACITORS FOR ALL DATA RATES UP TO kbps MAX7 TRANSMITTER OUTPUT OLTAGE vs. LOAD CAPACITANCE (MBAUD = ) MAX7 SUPPLY CURRT vs. LOAD CAPACITANCE (MBAUD = ) TRANSMITTER AT FULL DATA RATE TRANSMITTERS AT / DATA RATE kω + C L LOAD, EACH OUTPUT =. Mbps Mbps kbps Mbps.Mbps.Mbps Mbps kbps kbps TRANSMITTER AT FULL DATA RATE TRANSMITTERS AT / DATA RATE kω + C L LOADS =. MAX- MAX-8 MAX- SUPPLY CURRT (ma) SLEW RATE (/µs) 7 MAX SUPPLY CURRT vs. LOAD CAPACITANCE WH TRANSMITTING DATA 8 kbps kbps kbps MAX7 SLEW RATE vs. LOAD CAPACITANCE (MBAUD = ) +SLEW -SLEW TRANSMITTER AT kbps TRANSMITTERS AT kbps kω + C L LOADS =. MAX7 SKEW vs. LOAD CAPACITANCE (t PLH - t PHL ) TRANSMITTER AT kbps TRANSMITTERS AT kbps kω + C L LOADS =. MBAUD = SKEW () AERAGE; PARTS MIN MAX MAX- MAX- MAX-9 Maxim Integrated

6 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Pin Description PIN DIP/SO MAX SSOP MAX MAX7 MAX NAME FUNCTION Receiver Enable. Active low. 8 8 Positive Terminal of oltage-doubler Charge-Pump Capacitor Generated by the Charge Pump C+ C- Negative Terminal of oltage-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 8, 8, 7 7,,, 7,, 9,, T_OUT RS- Tramitter Outputs 9, 9, 8, 8, 9, 8 R_IN RS- Receiver Inputs,, 9, 8,, 9 R_OUT TTL/CMOS Receiver Outputs,,, 7, 9,,,,, T_IN TTL/CMOS Tramitter Inputs 8 Ground to +. Supply oltage 8 SHDN Shutdown Control. Active low.,, N.C. MBAUD R_OUTB No Connection MegaBaud Control Input. Connect to for normal operation; connect to for Mbps tramission rates. Noninverting Complementary Receiver Outputs. Always active. Maxim Integrated

7 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Detailed Description Dual Charge-Pump oltage Converter The MAX/MAX/MAX7/MAX s internal power supply coists of a regulated dual charge pump that provides output voltages of +. (doubling charge pump) and -. (inverting charge pump), regardless of the input voltage (CC) over the. to. range. The charge pumps operate in a discontinuous mode; if the output voltages are less than., the charge pumps are enabled, and if the output voltages exceed., the charge pumps are disabled. Each charge pump requires a flying capacitor (C, C) and a reservoir capacitor (C, C) to generate the and supplies. RS- Tramitters The tramitters are inverting level tralators that convert CMOS-logic levels to. EIA/TIA- levels. The MAX/MAX/MAX tramitters 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 ). Typically, these three devices can operate at data rates of kbps. Tramitters can be paralleled to drive multiple receivers or mice. The MAX/MAX7/MAX s output stage is turned off (high impedance) when the device is in shutdown mode. When the power is off, the MAX/ MAX/MAX7/MAX permit the outputs to be driven up to ±. The tramitter inputs do not have pullup resistors. Connect unused inputs to or CC. MAX7 MegaBaud Operation In normal operating mode (MBAUD = ), the MAX7 tramitters guarantee a kbps data rate with worst-case loads of kω in parallel with pf. This provides compatibility with PC-to-PC communication software, such as Laplink. For higher speed serial communicatio, the MAX7 features MegaBaud operation. In MegaBaud operating mode (MBAUD = CC), the MAX7 tramitters guarantee a Mbps data rate with worst-case loads of kω in parallel with pf for. < CC <.. For ±% operation, the MAX7 tramitters guarantee a Mbps data rate into worst-case loads of kω in parallel with pf. LapLink is a trademark of Traveling Software, Inc..µF.µF C+ C+ C C C- C+ C- T_ IN C- C+ C- T_ IN MAX MAX MAX7 MAX T_ OUT C C C C MAX MAX MAX7 MAX T_ OUT C C R_ OUT R_ IN R_ OUT R_ IN * * SHDN* kω pf SHDN* 7kΩ pf * MAX/MAX ONLY MINIMUM SLEW-RATE TEST CIRCUIT MAXIMUM SLEW-RATE TEST CIRCUIT Figure. Slew-Rate Test Circuits Maxim Integrated 7

8 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Rx PROTECTION DIODE UART UART TO µp Tx Rx PROTECTION DIODE LOGIC TRANSITION DETECTOR Tx SHDN = ROUTB ROUT = TIN SHDN = PREIOUS RS- a) OLDER RS-: POWERED-DOWN UART DRAWS CURRT FROM ACTIE RECEIER OUTPUT IN SHUTDOWN. MAX7 MAX b) NEW MAX7/MAX: SHUTS DOWN RECEIER OUTPUTS (EXCEPT FOR B OUTPUTS), SO NO CURRT FLOWS TO UART IN SHUTDOWN. B OUTPUTS INDICATE RECEIER ACTIITY DURING SHUTDOWN WITH HIGH. Figure. Detection of RS- Activity when the UART and Interface are Shut Down; Comparison of MAX7/MAX (b) with Previous Traceivers (a). RIN TOUT RS- Receivers The receivers convert RS- signals to CMOS-logic output levels. The MAX/MAX7/MAX receivers have inverting three-state outputs. In shutdown, the receivers can be active or inactive (Table ). The complementary outputs on the MAX7 (ROUTB) and the MAX (ROUTB, ROUTB) are always active, regardless of the state of or SHDN. This allows for Ring Indicator applicatio without forward biasing other devices connected to the receiver outputs. This is ideal for systems where CC is set to in shutdown to accommodate peripherals, such as UARTs (Figure ). MAX/MAX7/MAX 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 CC, is pulled to ground, and the tramitter outputs are disabled (high impedance). The time required to exit shutdown is typically µs, as shown in Figure. Connect SHDN to CC if the shutdown mode is not used. SHDN has no effect on R_OUT or R_OUTB. MAX/MAX7/MAX Enable Control The inverting receiver outputs (R_OUT) are put into a high-impedance state when is high. The complementary outputs ROUTB and ROUTB are always active, regardless of the state of and SHDN (Table ). has no effect on T_OUT. Applicatio Information 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.µf capacitors for. operation. For other supply voltages, refer to Table for required capacitor values. Do not use values lower than those listed in Table. Increasing the capacitor values (e.g., by a factor of ) reduces ripple on the tramitter outputs and slightly reduces power coumption. C, C, and C can be increased without changing C s value. However, do not increase C without also increasing the values of C, C, and C, to maintain the proper ratios (C to the 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. 8 Maxim Integrated

9 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Table. MAX/MAX7/MAX Shutdown and Enable Control Truth Table SHDN Table. Required Minimum Capacitor alues () T_OUT High-Z High-Z Active Active C (µf) MAX/MAX/MAX. to..7. to.. R_OUT Active High-Z Active High-Z C, C, C (µf). to... MAX7. to... to... to..7. to.. R_OUTB (MAX7/ MAX) Active Active Active Active Power-Supply Decoupling In most circumstances, a.µf bypass capacitor is adequate. In applicatio that are seitive to powersupply noise, decouple CC to ground with a capacitor of the same value as charge-pump capacitor C. Connect bypass capacitors as close to the IC as possible. Operation Down to.7 Tramitter outputs will meet EIA/TIA- levels of ±.7 with supply voltages as low as.7. Tramitter Outputs when Exiting Shutdown Figure shows two tramitter outputs when exiting shutdown mode. As they become active, the two tramitter outputs are shown going to opposite RS- levels (one tramitter input is high, the other is low). Each tramitter is loaded with kω in parallel with pf. The tramitter outputs display no ringing or undesirable traients as they come out of shutdown. Note that the tramitters are enabled only when the magnitude of exceeds approximately. Mouse Driveability The MAX has been specifically designed to power serial mice while operating from low-voltage power supplies. It has been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX successfully drove all serial mice tested and met their respective current and voltage requirements. Figure a shows the tramitter output voltages under increasing load current at.. Figure b shows a typical mouse connection using the MAX. /div T /div T =. C C =.µf µs/div Figure. Tramitter Outputs when Exiting Shutdown or Powering Up Maxim Integrated 9

10 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors TRANSMITTER OUTPUT OLTAGE () =. T OUT + T T OUT - OUT + OUT - MAX- - 7 LOAD CURRT PER TRANSMITTER (ma) Figure a. MAX Tramitter Output oltage vs. Load Current per Tramitter = to..µf C C 8 C+ C- C+ C- MAX 7 C C COMPUTER SERIAL PORT TIN TOUT 9 TIN TOUT + TIN ROUTB TOUT + - ROUTB 9 ROUT RIN Tx 8 ROUT RIN 7 ROUT RIN ROUT RIN 7 ROUT RIN 8 MOUSE SHDN Figure b. Mouse Driver Test Circuit Maxim Integrated

11 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors.µF TIN /div C C+ C- C TOUT ROUT /div /div C C+ C- MAX MAX MAX7 MAX C =. µs/div T_ IN T_ OUT Figure. MAX Loopback Test Result at kbps R_ OUT R_ IN * SHDN* pf TIN /div TOUT /div * MAX/MAX ONLY ROUT /div Figure. Loopback Test Circuit =. µs/div High Data Rates The MAX/MAX/MAX maintain the RS- ±. minimum tramitter output voltage even at high data rates. Figure shows a tramitter loopback test circuit. Figure shows a loopback test result at kbps, and Figure 7 shows the same test at kbps. For Figure, all tramitters were driven simultaneously at kbps into RS- loads in parallel with pf. For Figure 7, a single tramitter was driven at kbps, and all tramitters were loaded with an RS- receiver in parallel with pf. The MAX7 maintai the RS- ±. minimum tramitter output voltage at data rates up to Mbps. Figure 8 shows a loopback test result at Mbps with MBAUD =. For Figure 8, all tramitters were loaded with an RS- receiver in parallel with pf. Figure 7. MAX Loopback Test Result at kbps =. /div T_IN T_OUT = R_IN + pf R_OUT pf Figure 8. MAX7 Loopback Test Result at kbps (MBAUD = ) Maxim Integrated

12 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Interconnection with and Logic The MAX/MAX/MAX7/MAX can directly interface with various logic families, including ACT and HCT CMOS. See Table for more information on possible combinatio of interconnectio. Table. Logic-Family Compatibility with arious Supply oltages SYSTEM POWER- SUPPLY OLTAGE (). MAX SUPPLY OLTAGE ().. COMPATIBILITY Compatible with all CMOS families. Compatible with all TTL and CMOS-logic families. Compatible with ACT and HCT CMOS, and with TTL. Incompatible with AC, HC, and CD CMOS. Typical Operating Circuits.µF C.µF C.µF +. 7 MAX 7 C*.µF C.µF.µF.µF.µF +. C+ C- C+ C- C+ C- C+ C- MAX C*.µF C.µF TIN TOUT TIN TOUT TTL/CMOS INPUTS TIN TOUT 8 RS- OUTPUTS TTL/CMOS INPUTS TIN TOUT 7 RS- OUTPUTS ROUT RIN ROUT RIN TTL/CMOS OUTPUTS ROUT RIN 9 RS- INPUTS TTL/CMOS OUTPUTS 9 ROUT RIN 8 RS- INPUTS SHDN 8 PIN NUMBERS REFER TO DIP/SO PACKAGES. * C CAN BE RETURNED TO EITHER OR GROUND. * C CAN BE RETURNED TO EITHER OR GROUND. SEE TABLE FOR CAPACITOR SELECTION Maxim Integrated

13 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Typical Operating Circuits (continued).µf.µf 8 C+ C- C+ C-.µF C+ C- C+ C- MAX7 7.µF.µF +..µf.µf.µf 8 MAX 7 C*.µF C.µF TIN T TOUT TIN TOUT 9 LOGIC INPUTS 9 7 TIN TIN TIN TIN ROUTB T T T T TOUT TOUT 7 TOUT TOUT RS- OUTPUTS TTL/CMOS INPUTS 9 TIN TIN ROUTB ROUTB ROUT TOUT TOUT RIN RS- OUTPUTS LOGIC OUTPUTS 8 ROUT ROUT ROUT R R R RIN 8 RIN 9 RIN RS- INPUTS TTL/CMOS OUTPUTS 8 7 ROUT ROUT ROUT ROUT RIN RIN RIN 7 RIN 8 RS- INPUTS MBAUD SHDN SHDN * C CAN BE RETURNED TO EITHER OR GROUND. * C CAN BE RETURNED TO EITHER OR GROUND. Maxim Integrated

14 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Pin Configuratio (continued) TOP IEW + SHDN C+ C+ C+ C- C+ C- TOUT RIN C- C- TOUT RIN ROUT MAX TOUT RIN ROUT N.C. TIN TIN N.C MAX 9 TOUT RIN ROUT TIN TIN ROUT SSOP/TSSOP DIP/SO/TSSOP C+ + 8 C+ C+ + 8 C+ 7 C- 7 C- C- RIN TOUT TOUT MAX7 TIN TIN RIN RIN MAX C- TOUT 7 TIN RIN 7 SHDN RIN 8 ROUT RIN 8 ROUTB RIN 9 ROUT TOUT 9 ROUTB TOUT 9 TIN TOUT 9 ROUT RIN 8 ROUT TOUT 8 ROUT TOUT 7 TIN TIN 7 ROUT ROUTB TIN ROUT SHDN MBAUD TIN ROUT SSOP SO/SSOP/TSSOP Maxim Integrated

15 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE PKG CODE MAXEUP+ - C to +8 C TSSOP U+ MAXEAP+ - C to +8 C SSOP A+ MAXEWN+ - C to +8 C 8 SO W8+ MAXEPN+ - C to +8 C 8 Plastic Dip P8+ MAXC/D C to +7 C Dice* MAXCUE+ C to +7 C TSSOP U+ MAXCSE+ C to +7 C Narrow SO S+ MAXCWE+ C to +7 C Wide SO N+ MAXCPE+ C to +7 C Plastic DIP P+ MAXEUE+ - C to +8 C TSSOP U+ MAXESE+ - C to +8 C Narrow SO S+ PART TEMP RANGE PIN-PACKAGE *Dice are tested at T A = + C, DC parameters only. +Denotes lead-free package. PKG CODE MAXEWE+ - C to +8 C Wide SO W+ MAXEPE+ - C to +8 C Plastic DIP P+ MAXCAI+ C to +7 C 8 SSOP A8+ MAX7EAI+ - C to +8 C 8 SSOP A8+ MAX7CUI+ C to +7 C 8 TSSOP U8+ MAXCAI+ C to +7 C 8 SSOP A8+ MAXCWI+ C to +7 C 8 SO W8+ MAXEUI+ - C to +8 C 8 TSSOP U8+ MAXEAI+ - C to +8 C 8 SSOP A8+ MAXEWI+ - C to +8 C 8 SO W8+ Powered EIA/TIA- and EIA/TIA- Traceivers from Maxim PART POWER- SUPPLY OLTAGE () No. OF TRANSMITTERS/ RECEIERS No. OF RECEIERS ACTIE IN SHUTDOWN GUAR- ANTEED DATA RATE (kbps) EIA/ TIA- OR FEATURES MAX. to. / Drives mice MAX8.8 to. / Operates directly from batteries without a voltage regulator MAX.7 to. / Wide supply range MAX. to. /.µf capacitors MAX.7 to. / AutoShutdown, complementary receiver, drives mice, traient detection MAX. to. /.µf capacitors MAX. to. /.µf capacitors, AutoShutdown MAX. to. / N/A.µF capacitors MAX7. to. / /.µf capacitors, complementary receiver, MegaBaud operation MAX. to. /.µf capacitors, complementary receivers, drives mice MAX. to. /.µf capacitors, AutoShutdown, complementary receiver, drives mice Maxim Integrated

16 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Chip Topography MAX SHDN C+ Chip Information PART TRANSISTOR COUNT MAX 9 MAX 9 C+.7" (.mm) C- C- TOUT RIN MAX7 MAX 89 ROUT TOUT RIN ROUT TIN TIN.87" (.9mm) TRANSISTOR COUNT: 9 SUBSTRATE CONNECTED TO Maxim Integrated

17 MAX/MAX/MAX7/MAX. to., Low-Power, up to Mbps, True RS- Traceivers Using Four.µF External Capacitors Package Information (The package drawing(s) in this data sheet may not reflect the most current specificatio. For the latest package outline information, go to TSSOP.mm.EPS PACKAGE OUTLINE, TSSOP.mm BODY - I Pages changed at Rev 7:,,, 7 Revision History Maxim cannot assume respoibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licees are implied. Maxim reserves the right to change the circuitry and specificatio without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Rio Robles, San Jose, CA 9 USA Maxim Integrated The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.