Datasheet

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General Description

The MAX3160E/MAX3161E/MAX3162E are programma-

ble RS-232/RS-485/RS-422 multiprotocol transceivers.

The MAX3160E/MAX3161E are pin programmable as a

2Tx/2Rx RS-232 interface or a single RS-485/RS-422

transceiver. The MAX3162E is configured as a 2Tx/2Rx

RS-232 interface, and a single RS-485/RS-422 trans-

ceiver simultaneously.

The MAX3160E/MAX3161E/MAX3162E feature enhanced

electrostatic discharge (ESD) protection. All of the trans-

mitter outputs and receiver inputs are protected to ±15kV

using the Human Body Model.

All devices incorporate a proprietary low-dropout trans-

mitter output stage, and an on-board dual charge pump

to allow RS-232- and RS-485-/RS-422-compliant perfor-

mance from a +3V to +5.5V supply. The receivers feature

true fail-safe circuitry that guarantees a logic-high receiv-

er output when the receiver inputs are open or shorted.

These devices also feature pin-selectable transmitter

slew rates for RS-232 and RS-485/RS-422 modes. Slew-

rate limiting minimizes EMI and reduces reflections

caused by improperly terminated cables, allowing error-

free data transmission up to 250kbps. Disabling slew-rate

limiting allows these devices to transmit at data rates up

to 10Mbps in RS-485/RS-422 mode and up to 1Mbps in

RS-232 mode. The MAX3160E/MAX3161E/MAX3162E

feature a 10nA shutdown mode, short-circuit limiting, and

thermal shutdown circuitry to protect against excessive

power dissipation.

The MAX3160E/MAX3162E offer a flow-through pin-

out that facilitates board layout. The MAX3160E/

MAX3161E/MAX3162E are available in tiny SSOP pack-

ages and operate over the commercial and extended

temperature ranges.

________________________Applications

Point-of-Sales Equipment Peripherals

Industrial Controls Networking

RS-232 to RS-485 Security Systems

Interface Converters

Features

♦ Single Supply Operation from +3V to +5.5V

♦ ESD Protection

±15kV Human Body Model

♦ Pin-Selectable as 2Tx/2Rx RS-232 or Single

RS-485/RS-422 (MAX3160E/MAX3161E)

♦ 2Tx/2Rx RS-232 and Single RS-485/RS-422

(MAX3162E)

♦ Pin-Selectable RS-232/RS-485 Transmitter Slew

Rates Reduce EMI

♦ 10Mbps RS-485 and 1Mbps RS-232 Data Rates

♦ Pin-Selectable Half-Duplex or Full-Duplex

RS-485/RS-422 Operation (MAX3160E/MAX3161E)

♦ RS-485/RS-422 True Fail-Safe Receivers

♦ 10nA Shutdown Supply Current

♦ 1/8-Unit Load Allows up to 256 Transceivers on

the Bus

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,

RS-232/RS-485/RS-422 Multiprotocol Transceivers

________________________________________________________________ Maxim Integrated Products 1

19-3580; Rev 0; 2/05

EVALUATION KIT

AVAILABLE

Typical Operating Circuit

Pin Configurations appear at end of data sheet.

Selector Guide appears at end of data sheet.

DI/T1IN

Z(B)/T1OUT

R1OUT

B/R1IN

GND FAST HDPLX SHDN

Y(A)/T2OUT

A/R2IN

CTS

DE485/T2IN

RTS

RO/R2OUT

910

RJ45

DB9

SHDN

µP

SPI

MAX3100

RS-485/RS232

MAX3160E

+3V TO +5.5V

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

CODE

MAX3160ECAP

0°C to +70°C

20 SSOP A20-2

MAX3160EEAP

-40°C to +85°C

20 SSOP A20-2

MAX3161ECAG

0°C to +70°C

24 SSOP A24-3

MAX3161EEAG

-40°C to +85°C

24 SSOP A24-3

MAX3162ECAI

0°C to +70°C

28 SSOP A28-1

MAX3162EEAI

-40°C to +85°C

28 SSOP A28-1

Summary of content (26 pages)

PAGE 1
KIT ATION EVALU E L B AVAILA 19-3580; Rev 0; 2/05 ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers Features The MAX3160E/MAX3161E/MAX3162E are programmable RS-232/RS-485/RS-422 multiprotocol transceivers. The MAX3160E/MAX3161E are pin programmable as a 2Tx/2Rx RS-232 interface or a single RS-485/RS-422 transceiver. The MAX3162E is configured as a 2Tx/2Rx RS-232 interface, and a single RS-485/RS-422 transceiver simultaneously.
PAGE 2
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers ABSOLUTE MAXIMUM RATINGS Output Short-Circuit Duration T1OUT, T2OUT, Y, Z ..............................................Continuous Continuous Power Dissipation (TA = +70°C) 20-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW 24-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW 28-Pin SSOP (derate 9.1mW/°C above +70°C) ...........727mW Operating Temperature Ranges MAX316_CA_ ...
PAGE 3
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers (VCC = +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%; TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) (Note 2) PARAMETER SYMBOL RS-232 RECEIVER INPUTS (R1IN, R2IN) CONDITIONS MIN Input Voltage Range TYP -25 Logic-Input Low MAX UNITS +25 V 0.8 Logic-input High VCC = +3.3V 2.0 VCC = +5V 2.
PAGE 4
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers ELECTRICAL CHARACTERISTICS (continued) (VCC = +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%; TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.
PAGE 5
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers (VCC = +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%; TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.
PAGE 6
Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, CBYPASS, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground, TA = +25°C, unless otherwise noted.) MAX3160E/MAX3161E OPERATING SUPPLY CURRENT RS-232 TRANSMITTER SLEW RATE NO-LOAD SUPPLY CURRENT vs. LOAD CAPACITANCE WHEN vs. LOAD CAPACITANCE (FAST = VCC) vs. TEMPERATURE TRANSMITTING DATA (RS-232 MODE) 60 50 FALLING 40 30 40 DATA RATE = 250kbps 30 20 MAX3160E toc06 2.
PAGE 7
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers 10 8 6 4 80 FALLING 50 40 30 20 2 RISING 40 FALLING 35 30 25 10 20 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 -40 -15 10 35 60 -40 85 -15 10 35 60 85 OUTPUT-HIGH VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) RS-485/RS-422 DRIVER PROPAGATION DELAY vs.
PAGE 8
Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, CBYPASS, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground, TA = +25°C, unless otherwise noted.) MAX3160E RS-232 TRANSMITTER PROPAGATION (FAST = GND, 250kbps) MAX3160E RS-232 TRANSMITTER PROPAGATION (FAST = VCC, 250kbps) MAX3160E toc22 MAX3160E toc23 CL = 1000pF RL = 7kΩ CL = 150pF RL = 7kΩ DI 2V/div DI 2V/div T_OUT 5V/div T_OUT 5V/div 1.0µs/div 1.
PAGE 9
±15kV ESD-Protected, +3.0V to +5.
PAGE 10
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers Pin Description (continued) PIN NAME FUNCTION MAX3160E MAX3161E MAX3162E 13 — — A/R2IN Noninverting RS-485/RS-422 Receiver Input/RS-232 Receiver Input 14 — — B/R1IN Inverting RS-485/RS-422 Receiver Input/RS-232 Receiver Input — — 15 RE232 RS-232 Receiver Enable. Logic-level low enables RS-232 receivers.
PAGE 11
±15kV ESD-Protected, +3.0V to +5.
PAGE 12
±15kV ESD-Protected, +3.0V to +5.
PAGE 13
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers Test Circuits Y R VCC 1 C1+ V+ VCC C2+ VOD 28 C3 C1 2 3 CHARGE PUMP C1- C2- GND V- C2 RS-485 OUTPUTS 7 Figure 1. RS-485/RS-422 Driver DC Test Load C4 24 Z Y ESD PROTECTION 6 D 22 S2 211 Figure 2.
PAGE 14
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers Test Circuits (continued) +3V +3V 0V 1.5V 1.5V INPUT INPUT 1.5V 0V VCC OUTPUT V+ 50% 50% tPHL 0V V- OUTPUT GND tPLH tPLH tPHL tSKEW = | tPLH - tPHL | tRSKEW = | tPLH - tPHL | Figure 6. RS-232 Transmitter Propagation-delay Timing Figure 5. RS-232 Receiver Propagation-Delay Timing 3V DI 1.5V 0 1.
PAGE 15
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers The MAX3160E/MAX3161E/MAX3162E +3V to +5.5V, multiprotocol transceivers can be pin-configured in a number of RS-232 and RS-485/RE-422 interface combinations. These circuit configurations are ideal for the design of RS-232 to RS-485 converters, multiprotocol buses, or any application that requires both RS-232 and RS-485 transceivers.
PAGE 16
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers magnitude of either output voltage is less than +5.5V, the charge pumps are enabled. If the magnitude of both output voltages exceeds +5.5V, the charge pumps are disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies (see the Functional Diagrams).
PAGE 17
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers T1OUT 2V/div GND T2OUT 2V/div CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF MAX3160E/MAX3161E/MAX3162E RC 1MΩ SHDN 5V/div RD 1.5kΩ DISCHARGE RESISTANCE DEVICE UNDER TEST STORAGE CAPACITOR 40µs/div Figure 12. RS-232 Transmitter Outputs when Exiting Shutdown Machine Model The Machine Model for ESD testing uses a 200pF storage capacitor and zero-discharge resistance.
PAGE 18
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers RS-232 Transmitter Outputs when Exiting Shutdown Figure 12 shows two transmitter outputs when exiting shutdown mode. As they become active, the two transmitter outputs are shown going to opposite RS-232 levels (one transmitter input is high, the other is low). Each transmitter is loaded with 3kΩ in parallel with 1000pF.
PAGE 19
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers TIN TOUT 5V/div TOUT 5V/div ROUT ROUT 1µs/div 1µs/div Figure 15. MAX3161E/MAX3162E RS-232 Loopback Test Result at 250kbps, FAST = Low Multiprotocol Bus The Typical Operating Circuit shows a standard application for the MAX3160E. The MAX3160E’s outputs are multiplexed between RS-232 and RS-485 protocols by a microprocessor (µP).
PAGE 20
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers 3.3V MAX3160E MAX3161E MAX3162E A CBYPASS 100nF 120Ω RO R RE485 DATA IN B 2 27 C2 100nF DE485 Z DI D Y 26 120Ω 13 DATA OUT 5 RCV 10 23 NOTE: RE485 ON MAX3162E ONLY 19 TX 20 RTS 15 Figure 17.
PAGE 21
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers RS-232 Receivers Truth Tables Table 4. MAX3160E Table 1. MAX3160E INPUTS OUTPUTS INPUTS SHDN RS-485/ RS-232 DI/T1IN, DE485/T2IN Z(B)/T1OUT, Y(A)/T2OUT SHDN 0 X X 1/8-unit load 1 0 0 1 1 0 1 0 1 1 X RS-485 mode OUTPUTS RS-485/ RS-232 B/R1IN, A/R2IN R1OUT, RO/R2OUT X 0 0 1 X 0 1 0 X 0 Inputs open 1 R1OUT X 1 X RO/R2OUT in RS-485 mode Table 2.
PAGE 22
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers RS-485/RS-422 Drivers Truth Tables Table 7. MAX3160E INPUTS OUTPUTS SHDN RS-232 RS-485/R DE485/T2IN 0 X X X 1/8-unit load 1/8-unit load 1 1 0 X 1/8-unit load 1/8-unit load 1 1 1 0 1 0 1 1 1 1 0 1 X 0 X X DI/T1IN Z(B)/T1OUT Y(A)/T2OUT RS-232 mode Table 8.
PAGE 23
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers Table 11. MAX3161E INPUTS RS-485/RS-232 SHDN HDPLX 1 0 1 1 1 1 OUTPUT A-B Y(A) - Z(B) RO/R2OUT X X X High-impedance up to VCC 0 ≥-50mV X 1 1 0 ≤-200mV X 0 1 0 Floating X 1 1 1 1 X ≥-50mV 1 1 1 1 X ≤-200mV 0 1 1 1 X Floating 1 0 X X X X RS-232 mode Table 12. MAX3162E INPUTS OUTPUT Table 13.
PAGE 24
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers Table 14. Cable Connections Commonly Used for EIA/TIA-232 and V.
PAGE 25
±15kV ESD-Protected, +3.0V to +5.
PAGE 26
Package Information 2 SSOP.EPS MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers 1 INCHES E H MILLIMETERS DIM MIN MAX MIN MAX A 0.068 0.078 1.73 1.99 A1 0.002 0.008 0.05 0.21 B 0.010 0.015 0.25 0.38 C 0.20 0.09 0.004 0.008 SEE VARIATIONS D E e 0.205 0.212 0.0256 BSC 5.20 MILLIMETERS INCHES D D D D D 5.38 MIN MAX MIN MAX 0.239 0.239 0.278 0.249 0.249 0.289 6.07 6.07 7.07 6.33 6.33 7.33 0.317 0.