Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - transceivers RS422, RS485 1/1 SOIC 8 N

Selector Guide

Pin compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.

MAX3080E–MAX3089E

±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps),

Slew-Rate-Limited RS-485/RS-422 Transceivers

________________________________________________________________

Maxim Integrated Products

19-1800; Rev 1; 5/06

Ordering Information continued at end of data sheet.

Ordering Information

General Description

The MAX3080E–MAX3089E are ±15kV electrostatic dis-

charge (ESD)-protected, high-speed transceivers for RS-

485/RS-422 communication that contain one driver and

one receiver. These devices feature fail-safe circuitry,

which guarantees a logic-high receiver output when the

receiver inputs are open or shorted. This means that the

receiver output will be a logic high if all transmitters on a

terminated bus are disabled (high impedance). The

MAX3080E/MAX3081E/MAX3082E feature reduced

slew-rate drivers that minimize EMI and reduce reflec-

tions caused by improperly terminated cables, allowing

error-free data transmission up to 115kbps. The

MAX3083E/MAX3084E/MAX3085E offer higher driver

output slew-rate limits, allowing transmit speeds up to

500kbps. The MAX3086E/MAX3087E/ MAX3088Es’ dri-

ver slew rates are not limited, making transmit speeds

up to 10Mbps possible. The MAX3089E’s slew rate is

selectable between 115kbps, 500kbps, and 10Mbps by

driving a selector pin with a single three-state driver. All

devices feature enhanced ESD protection. All transmitter

outputs and receiver inputs are protected to ±15kV

using the Human Body Model.

These transceivers typically draw 375µA of supply

current when unloaded, or when fully loaded with the dri-

vers disabled.

All devices have a 1/8-unit-load receiver input impedance

that allows up to 256 transceivers on the bus. The

MAX3082E/MAX3085E/MAX3088E are intended for half-

duplex communications, while the MAX3080E/MAX3081E/

MAX3083E/MAX3084E/MAX3086E/MAX3087E are

intended for full-duplex communications. The MAX3089E

is selectable between half-duplex and full-duplex opera-

tion. It also features independently programmable

receiver and transmitter output phase via separate pins.

Features

♦♦

ESD Protection for RS-485 I/O Pins

±15kV, Human Body Model

♦♦

True Fail-Safe Receiver While Maintaining

EIA/TIA-485 Compatibility

♦♦

Enhanced Slew-Rate Limiting Facilitates

Error-Free Data Transmission

(MAX3080E–MAX3085E/MAX3089E)

♦♦

1nA Low-Current Shutdown Mode (Except

MAX3081E/MAX3084E/MAX3087E)

♦♦

Pin-Selectable Full/Half-Duplex Operation

(MAX3089E)

♦♦

Phase Controls to Correct for Twisted-Pair

Reversal (MAX3089E)

♦♦

Allow Up to 256 Transceivers on the Bus

Applications

RS-422/RS-485 Communications

Level Translators

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks

PART TEMP. RANGE PIN-PACKAGE

MAX3080ECSD

0°C to +70°C 14 SO

MAX3080ECPD 0°C to +70°C 14 Plastic DIP

MAX3080EESD -40°C to +85°C 14 SO

MAX3080EEPD -40°C to +85°C 14 Plastic DIP

Part

Half/Full

Duplex

Data

Rate

(Mbps)

Slew-

Rate

Limited

Low-

Power

Shutdown

Receiver/

Driver

Enable

Quiescent

Current

(µA)

Transceivers

Bus

Count

Industry-

Standard

Pinout

7518014256375YesYesYes0.115

75179

75176

75180

75179

75176

75180

75179

75176

75180*14

8256

256

256375

375

375No

Yes

YesYes

Yes

NoYes

Yes

SelectableSelectable

0.5

0.115

Selectable

Half

Full

Half

Full

Half

Full

MAX3080E

MAX3081E

MAX3082E

MAX3083E

MAX3084E

MAX3085E

MAX3086E

MAX3087E

MAX3088E

MAX3089E

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

Summary of content (20 pages)

PAGE 1
9-1800; Rev 1; 5/06 ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers The MAX3080E–MAX3089E are ±15kV electrostatic discharge (ESD)-protected, high-speed transceivers for RS485/RS-422 communication that contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted.
PAGE 2
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC) ............................................................+7V Control Input Voltage (RE, DE)...................-0.3V to (VCC + 0.3V) Special Input Voltage (H/F, SRL, TXP, RXP)..............................-0.3V to (VCC + 0.3V) Driver Input Voltage (DI).............................-0.3V to (VCC + 0.3V) Driver Output Voltage (A, B, Y, Z)..........
PAGE 3
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3080E–MAX3089E DC ELECTRICAL CHARACTERISTICS (continued) (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS -200 -125 -50 mV 0.
PAGE 4
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX3080E/MAX3081E/MAX3082E, and MAX3089E with SRL = Unconnected (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.
PAGE 5
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.
PAGE 6
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX3086E/MAX3087E/MAX3088E, and MAX3089E with SRL = GND (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.
PAGE 7
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers A DE = GND B 375 A B: MAX3080E–MAX3085E, MAX3089E WITH SRL = OPEN OR VCC B 325 MAX3080/3089 TOC-2 20 0 20 40 60 80 100 20 15 10 5 0 0 -60 -40 -20 0 2 1 3 0 5 4 2 1 3 5 4 TEMPERATURE (°C) OUTPUT LOW VOLTAGE (V) OUTPUT HIGH VOLTAGE (V) SHUTDOWN CURRENT vs. TEMPERATURE RECEIVER OUTPUT LOW VOLTAGE vs. TEMPERATURE RECEIVER OUTPUT HIGH VOLTAGE vs. TEMPERATURE 16 14 12 10 8 6 0.
PAGE 8
Typical Operating Characteristics (continued) (VCC = +5V, TA = +25°C, unless otherwise noted.) DRIVER PROPAGATION DELAY (10Mbps MODE) vs. TEMPERATURE 760 720 680 640 600 50 45 40 35 30 520 20 -60 -40 -20 0 20 40 60 80 100 1.88 1.87 1.86 1.85 1.84 25 560 1.83 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 40 20 60 80 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) DRIVER OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGE OUTPUT CURRENT vs.
PAGE 9
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers RECEIVER PROPAGATION DELAY MAX3086E/MAX3087E/MAX3088E AND MAX3089E WITH SRL = GND RECEIVER PROPAGATION DELAY MAX3080E–MAX3085E AND MAX3089E WITH SRL = OPEN OR VCC MAX3080/3089 TYP-18 MAX3080/3089 TYP-17 VA - VB 2V/div VA - VB 2V/div RO 5V/div RO 5V/div 50ns/div 50ns/div DRIVER PROPAGATION DELAY MAX3080E/MAX3081E/MAX3082E AND MAX3089E WITH SRL = OPEN MAX3080/3089 TYP-20 DI 5V/div VY - VZ 2.
PAGE 10
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers Pin Description PIN MAX3080E MAX3081E MAX3082E MAX3083E MAX3084E MAX3085E MAX3086E MAX3087E MAX3088E FULL-DUPLEX DEVICES 10 MAX3089E HALFDUPLEX DEVICES FULLDUPLEX MODE HALFDUPLEX MODE NAME FUNCTION — — — 1 1 H/F Half/Full-Duplex Selector Pin. Connect H/F to VCC for halfduplex mode; connect to GND or leave unconnected for full-duplex mode. 2 2 1 2 2 RO Receiver Output.
PAGE 11
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers PIN MAX3080E MAX3081E MAX3082E MAX3083E MAX3084E MAX3085E MAX3086E MAX3087E MAX3088E FULL-DUPLEX DEVICES MAX3089E NAME HALFDUPLEX DEVICES FULLDUPLEX MODE HALFDUPLEX MODE FUNCTION 12 8 — 12 — A Noninverting Receiver Input — — — — 12 A Receiver Input Resistors* — — 6 — — A Noninverting Receiver Input and Noninverting Driver Output — — — 13 13 RXP Receiver Phase.
PAGE 12
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers Function Tables (continued) MAX3082E/MAX3085E/MAX3088E MAX3089E TRANSMITTING TRANSMITTING INPUTS INPUTS OUTPUTS OUTPUTS RE DE DI B/Z A/Y TXP RE DE DI Z Y X 1 1 0 1 0 X 1 1 0 1 0 0 X 1 0 1 0 High-Z 1 X 1 1 1 0 1 X 1 0 0 1 X 0 0 X High-Z High-Z X 1 0 X X 1 0 1 0 0 X High-Z 1 0 X Shutdown Shutdown RECEIVING INPUTS OUTPUT RE
PAGE 13
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers VCC DE 4 R RO 2 13 N.C. RE 3 12 A DE 4 11 B DI 5 10 Z D GND 6 GND 7 9 5 DI Y 8 N.C. Y MAX3080E MAX3083E MAX3086E Rt D RO R 10 Z 12 2 RO 9 VCC RE 0.1μF 14 14 VCC N.C. 1 MAX3080E–MAX3089E TOP VIEW R A Rt D 11 DI B NC 1, 8, 13 3 DIP/SO 6, 7 GND RE GND DE Figure 1. MAX3080E/MAX3083E/MAX3086E Pin Configuration and Typical Full-Duplex Operating Circuit TOP VIEW 0.
PAGE 14
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers Detailed Description The MAX3080E–MAX3089E high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a terminated transmission line with all drivers disabled (see the Fail-Safe section).
PAGE 15
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3080E–MAX3089E VCC RE MAX3089E A RD TOP VIEW B H/F 1 14 V CC RO 2 RE 3 RXP 13 RXP MAX3089E 12 A DE 4 11 B DI 5 10 Z SRL 6 9 Y GND 7 8 TXP H/F Z TXP DIP/SO Y DI NOTE: SWITCH POSITIONS INDICATED FOR H/F = GND GND DE SRL Figure 4. MAX3089E Pin Configuration and Functional Diagram Y TEST POINT RECEIVER OUTPUT CRL 15pF R VOD R 1k VCC S1 1k VOC S2 Z Figure 5.
PAGE 16
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers 3V DE DI CL1 Y RDIFF OUTPUT UNDER TEST VOD2 Z CL CL2 S2 Figure 7. Driver Timing Test Circuit Figure 8. Driver Enable and Disable Timing Test Load 5V 5V DI 1.5V 0 DE 1.5V tDPHL tDPLH 1.5V 1.5V 0 1/2 VO tDZL(SHDN), tDZL Z tDLZ Y, Z VO 2.3V OUTPUT NORMALLY LOW VOL Y 1/2 VO VO VDIFF 0 -VO VCC S1 500Ω 10% VDIFF = V (Y) - V (Z) VOH -0.5V 2.
PAGE 17
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers CHARGE-CURRENT LIMIT RESISTOR MAX3080E–MAX3089E RC 1MΩ RD 1500Ω DISCHARGE RESISTANCE B RR RECEIVER OUTPUT A Ir Cs 100pF STORAGE CAPACITOR DEVICE UNDER TEST Figure 14a. Human Body ESD Test Model Figure 13. Receiver Propagation Delay Test Circuit IP 100% 90% HIGHVOLTAGE DC SOURCE MAX3080/3089 FIG-14 VID ATE PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 20dB/div 36.
PAGE 18
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3080/3089 FIG-18 MAX3080E/MAX3081E/MAX3083E/ MAX3084E/MAX3086E/MAX3087E/ MAX3089E (FULL DUPLEX) DI 5V/div VA - VB 1V/div RO 5V/div A RO RE R 120Ω B DATA IN DE Z DI D 120Ω Y DATA OUT NOTE: RE AND DE ON MAX3080E/MAX3083E/MAX3086E/MAX3089E ONLY. Figure 18.
PAGE 19
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3080/3089 FIG-20 DI 5V/div DI 5V/div VA - VB 1V/div VA - VB 1V/div RO 5V/div RO 5V/div 2μs/div 1μs/div Figure 20. MAX3083E/MAX3084E/MAX3085E, and MAX3089E with SRL = VCC, System Differential Voltage at 50kHz Driving 4000ft of Cable Figure 21.
PAGE 20
MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers A Y 120Ω R RO RE 120Ω D B Z Z B DE DI DE DI 120Ω D Y 120Ω Z Y B A Y Z B R A A R D D DI R RE RO DE RE RO DI DE RE RO NOTE: RE AND DE ON MAX3080E/MAX3083E/MAX3086E/MAX3089E ONLY. MAX3080E MAX3081E MAX3083E MAX3084E MAX3086E MAX3087E MAX3089E (FULL-DUPLEX) Figure 23.