Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - transceivers RS232, RS422, RS485 2/2 SSOP 28

AVAILABLE

Functional Diagrams

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and

ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

EVALUATION KIT AVAILABLE

General Description

The MAX3160/MAX3161/MAX3162 are programmable

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

MAX3160/MAX3161 are pin programmable as a 2TX/2RX

RS-232 interface or a single RS-485/422 transceiver. The

MAX3162 is configured as a 2TX/2RX RS-232 interface

and a single RS-485/422 transceiver simultaneously.

All devices incorporate a proprietary low-dropout trans-

mitter output stage and an on-board dual charge pump

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

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

feature true fail-safe circuitry that guarantees a logic-

high receiver output when the receiver inputs are open

or shorted. These devices also feature pin-selectable

transmitter slew rates for both RS-232 and RS-485/422

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-485/422

mode and up to 1Mbps in RS-232 mode. The

MAX3160/MAX3161/MAX3162 feature a 1µA shutdown

mode, and short-circuit limiting and thermal shutdown

circuitry to protect against excessive power dissipation.

The MAX3160/MAX3162 offer a flow-through pinout that

facilitates board layout. The MAX3160/MAX3161/

MAX3162 are available in tiny SSOP packages and

operate over the commercial and extended tempera-

ture ranges.

________________________Applications

Point-of-Sales Equipment Peripherals

Industrial Controls Networking

RS-232 to RS-485

Interface Converters

Features

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

♦ Pin-Programmable as 2TX/2RX RS-232 or Single

RS-485/422 (MAX3160/MAX3161)

♦ 2TX/2RX RS-232 and Single RS-485/422

(MAX3162)

♦ Pin-Programmable RS-232/RS-485 Transmitter

Slew Rates Reduce EMI

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

♦ Pin-Programmable Half-Duplex or Full-Duplex

RS-485/422 Operation (MAX3160/MAX3161)

♦ RS-485/422 True Fail-Safe Receivers

♦ Transmitters and Receivers Protected Against

Wiring Faults

♦ 1µA Shutdown Supply Current

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

the Bus

+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

PART TEMP RANGE PIN-PACKAGE

MAX3160CAP+ 0°C to +70°C 20 SSOP

MAX3160EAP+ -40°C to +85°C 20 SSOP

MAX3161CAG+ 0°C to +70°C 24 SSOP

MAX3161EAG+ -40°C to +85°C 24 SSOP

MAX3162CAI+ 0°C to +70°C 28 SSOP

MAX3162EAI+ -40°C to +85°C 28 SSOP

19-1722; Rev 2; 12/09

Ordering Information

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

DE/T2IN

RTS

RO/R2OUT

910

RJ45

DB9

SHDN

μP

SPI

MAX3100

RS485/RS232

MAX3160

+3V TO +5.5V

Denotes a lead(Pb)-free/RoHS-compliant package.

MAX3160/MAX3161/MAX3162

Summary of content (23 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX3160/MAX3161/MAX3162 LE AVAILAB +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers General Description The MAX3160/MAX3161/MAX3162 are programmable RS-232/RS-485/422 multiprotocol transceivers. The MAX3160/MAX3161 are pin programmable as a 2TX/2RX RS-232 interface or a single RS-485/422 transceiver. The MAX3162 is configured as a 2TX/2RX RS-232 interface and a single RS-485/422 transceiver simultaneously.
PAGE 2
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70°C) 20-Pin SSOP (derate 11.9W/°C above +70°C) ..........952mW 24-Pin SSOP (derate 14.9W/°C above +70°C) ........1195mW 28-Pin SSOP (derate 15W/°C above +70°C) ...........1201mW Operating Temperature Ranges MAX316_CA_ ....................................................0°C to +70°C MAX316_EA_ .................................................
PAGE 3
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 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 TA = +25°C.) PARAMETER SYMBOL RS-232 RECEIVER INPUTS (R1IN, R2IN) CONDITIONS MIN Input Voltage Range TYP -25 Input Threshold Low Input Threshold High VCC = +3.3V 0.6 VCC = +5V 0.
PAGE 4
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 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 TA = +25°C.
PAGE 5
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 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 TA = +25°C.
PAGE 6
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground, TA = +25°C, unless otherwise noted.) MAX3160/MAX3161 OPERATING SUPPLY CURRENT vs. RS-232 TRANSMITTER SLEW RATE NO-LOAD SUPPLY CURRENT vs. LOAD CAPACITANCE WHEN vs.
PAGE 7
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground, TA = +25°C, unless otherwise noted.) 8 6 4 RISING 0 FALLING 60 40 0.5 1.0 1.5 2.0 2.5 3.0 3.
PAGE 8
MAX3160/MAX3161/MAX3162 +3.0V to+5.
PAGE 9
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Pin Description (continued) PIN NAME FUNCTION MAX3160 MAX3161 MAX3162 13 — — A/R2IN Noninverting RS-485/422 Receiver Input/RS-232 Receiver Input 14 — — B/R1IN Inverting RS-485/422 Receiver Input/RS-232 Receiver Input — — 15 RE232 RS-232 Receiver Enable. Logic-level low enables RS232 receivers.
PAGE 10
MAX3160/MAX3161/MAX3162 +3.0V to+5.
PAGE 11
MAX3160/MAX3161/MAX3162 +3.0V to+5.
PAGE 12
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Functional Diagrams (continued) Test Circuits MAX3162 Y R VOD VCC 1 C1+ V+ 28 R C3 C1 2 3 VCC C2+ CHARGE PUMP C1- C2- 27 Z C2 26 Figure 1.
PAGE 13
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Test Circuits (continued) 3V DI 1.5V 0 OUTPUT UNDER TEST 500Ω 1.5V tDPHL tDPLH 1/2 VO VCC S1 Z VO Y CL S2 VDIFF VO 0 -VO 1/2 VO 10% VDIFF = Vy - Vz 90% 90% TDR 10% TDF tDSKEW = | tDPLH - tDPHL | Figure 4. RS-485/422 Driver Enable/Disable Timing Test Load 3V DE485 0 1.5V 1.5V tDZL tDLZ RO Y, Z 2.
PAGE 14
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Detailed Description The MAX3160/MAX3161/MAX3162 3V/5V, multiprotocol transceivers can be pin configured in a number of RS232 and RS-485/422 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 15
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers 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 Functional Diagrams).
PAGE 16
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Truth Tables RS-232 Receivers RS-232 Transmitters Table 4. MAX3160 Table 1. MAX3160 INPUTS INPUTS SHDN RS485 RS232 DI/T1IN, DE485/T2IN OUTPUTS OUTPUTS SHDN Z(B)/T1OUT, Y(A)/T2OUT RS-485/ RS-232 B/R1IN, A/R2IN R1OUT, RO/R2OUT X 0 0 1 X 0 1 0 X 0 Inputs Open 0 X X 1/8 Unit Load 1 0 0 1 1 0 1 0 1 1 X RS-485 Mode X 1 X 1 R1OUT High-Z, RO/R2OUT in RS-485 mode Table 5.
PAGE 17
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Truth Tables (continued) RS-485/422 Drivers Table 7. MAX3160 INPUTS OUTPUTS SHDN RS232 RS485/R DE485/T2IN DI/T1IN Z(B)/T1OUT Y(A)/T2OUT 0 1 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 RS-232 Mode Table 8.
PAGE 18
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Truth Tables (continued) Table 11. MAX3161 INPUTS RS485/RS232 SHDN HDPLX A-B Y(A) - Z(B) RO/R2OUT 1 0 X X X High-Z up to VCC 1 1 0 -50mV X 1 1 1 0 -200mV X 0 1 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. MAX3162 INPUTS OUTPUT SHDN RE485 A-B RO Table 13.
PAGE 19
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers MAX 3160-2 FIG10 MAX 3160-2 FIG12 SHDN 5V/division TIN T1OUT 2V/div TOUT GND 5V/div T2OUT 2V/div ROUT 40μs/div 1μs/div Figure 10. MAX3160 RS-232 Transmitter Outputs When Exiting Shutdown Figure 12. RS-232 Loopback Test Result at 250kbps, FAST = Low MAX 3160-2 FIG13 VCC CBYPASS TIN VCC C1+ TOUT V+ C1 C3 C1C2+ C2 C2- 5V/div MAX3160 MAX3161 MAX3162 VC4 ROUT T_ OUT T_ IN 200ns/div Figure 13.
PAGE 20
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers 3.3V MAX3160 MAX3161 MAX3162 A CBYPASS 100nF 120Ω RO R RE485 2 DATA IN B 27 C2 100nF DE485 Z DI D Y 26 120Ω 13 DATA OUT 5 RCV 10 23 NOTE: RE485 ON MAX3162 ONLY 19 TX 20 RTS 15 Figure 14. RS-485 Line Repeater 16 14 transfers data through the MAX3160 to the pin-selected RS-232 or RS-485 protocol; see Table 14 for commonly used cable connections.
PAGE 21
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Table 14. Cable Connections Commonly Used for EIA/TIA-232 and V.
PAGE 22
MAX3160/MAX3161/MAX3162 +3.0V to+5.
PAGE 23
MAX3160/MAX3161/MAX3162 +3.0V to+5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers Revision History REVISION NUMBER 2 REVISION DATE 12/09 DESCRIPTION PAGES CHANGED Corrected the “Continuous Power Dissipation” specifications under the Absolute Maximum Ratings. 2 Changed pin labels in the Functional Diagrams. 11 Deleted “TRANSISTOR COUNT: 1580” and added “PROCESS: BiCMOS” to the Chip Information.