General Description

The MAX3040–MAX3045 is a family of 5V quad RS-

485/RS-422 transmitters designed for digital data trans-

mission over twisted-pair balanced lines. All transmitter

outputs are protected to ±10kV using the Human Body

Model. In addition the MAX3040–MAX3045 withstand

±4kV per IEC 1000-4-4 Electrical Fast Transient/Burst

Stressing. The MAX3040/MAX3043 (250kbps) and the

MAX3041/MAX3044 (2.5Mbps) are slew-rate limited

transmitters that minimize EMI and reduce reflections

caused by improperly terminated cables, thus allowing

error-free transmission.

The MAX3040–MAX3045 feature a hot-swap capability*

that eliminates false transitions on the data cable during

power-up or hot insertion. The MAX3042B/MAX3045B

are optimized for data transfer rates up to 20Mbps, the

MAX3041/MAX3044 for data rates up to 2.5Mbps, and

the MAX3040/MAX3043 for data rates up to 250kbps.

The MAX3040–MAX3045 offer optimum performance

when used with the MAX3093E or MAX3095 5V quad

differential line receivers or MAX3094E/MAX3096 3V

quad differential line receivers.

The MAX3040–MAX3045 are ESD-protected pin-compat-

ible, low-power upgrades to the industry-standard

‘SN75174 and ‘DS26LS31C. They are available in space-

saving TSSOP, narrow SO, and wide SO packages.

*Patent pending

Applications

Telecommunications Equipment

Industrial Motor Control

Transmitter for ESD-Sensitive Applications

Hand-Held Equipment

Industrial PLCs

Networking

Features

o ESD Protection: ±10kV—Human Body Model

o Single +5V Operation

o Guaranteed Device-to-Device Skew

(MAX3040/MAX3041/MAX3043/MAX3044)

o Pin-Compatible with ‘SN75174, ‘26LS31C and

LTC487

o Hot-Swappable for Telecom Applications

o Up to 20Mbps Data Rate (MAX3042B/MAX3045B)

o Slew-Rate Limited (Data Rates at 2.5Mbps and

250kbps)

o 2nA Low-Power Shutdown Mode

o 1mA Operating Supply Current

o ±4kV EFT Fast Transient Burst Immunity per IEC

1000-4-4

o Level 2 Surge Immunity per IEC 1000-4-5,

Unshielded Cable Model

o Ultra-Small 16-Pin TSSOP, 16-Pin Narrow SO, and

Wide 16-Pin SO

±10kV ESD-Protected, Quad 5V RS-485/RS-422

Transmitters

________________________________________________________________ Maxim Integrated Products

1

Pin Configurations

Selector Guide

Ordering Information

19-2143; Rev 1; 12/01

Ordering Information continued at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

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

PART

TEMP RANGE

PIN-PACKAGE

DATA

RATE

MAX3040CUE

0

°C to +70°C 16 TSSOP

250kbps

MAX3040CSE

0

°C to +70°C 16 Narrow SO

250kbps

MAX3040CWE

0

°C to +70°C 16 Wide SO

250kbps

MAX3040EUE

-40

°C to +85°C

16 TSSOP

250kbps

MAX3040ESE

-40

°C to +85°C

16 Narrow SO

250kbps

MAX3040EWE -40

°C to +85°C

16 Wide SO

250kbps

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

T1IN

T4IN

Y4

Z4

EN34

Z3

Y3

T3IN

TOP VIEW

MAX3040

MAX3041

MAX3042B

16 TSSOP/SO

Y1

Z1

Y2

EN12

Z2

T2IN

GND

PART

DATA RATE

(bps)

INDUSTRY STANDARD

PINOUT

MAX3040

250k

75174, 34C87, LTC487

MAX3041

2.5M

75174, 34C87, LTC487

MAX3042B

20M

75174, 34C87, LTC487

MAX3043

250k

26LS31

MAX3044

2.5M

26LS31

MAX3045B

20M

26LS31

Pin Configurations continued at end of data sheet.