SP3491EP Просмотр технического описания (PDF) - Exar Corporation

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SP3491EP

+3.3V low power full duplex RS-485 transceivers with 10Mbps data rate

Exar Corporation 

SP3490 / SP3491

3.3V Low Power Full-Duplex RS-485 Transceivers

with 10Mbps Data Rate

Description

The SP3490 and SP3491 devices are 3.3V low power full-duplex

transceivers that meet the specifications of the RS-485 and RS-422

serial protocols. These devices are pin-to-pin compatible with the

MaxLinear SP490 and SP491 devices as well as popular industry

standards. The SP3490 and SP3491 feature MaxLinear’s BiCMOS

process, allowing low power operation without sacrificing performance.

The SP3490 and SP3491 meet the electrical specifications of the

RS-485 and RS-422 serial protocols up to 10Mbps under load. The

SP3491 is identical to the SP3490 with the addition of driver and

reciveiver tri-state enable lines.

Block Diagrams

FEATURES

■■ Full-duplex RS-485 and RS-422

transceivers

■■ Operates from a single 3.3V supply

■■ Interoperable with 5.0V logic

■■ Driver/receiver tri-state enable lines

(SP3491)

■■ -7V to 12V common-mode input voltage

range

■■ ±200mV receiver input sensitivity

■■ Allows up to 32 transceivers on the serial

bus

■■ Compatability with LTC490 and SN75179

(SP3490)

■■ Compatability with LTC491 and SN75180

(SP3491)

Ordering Information - Back Page

VCC 1

R2

D3

GND 4

R

D

SP3490

8A

7B

6Z

5Y

NC 1

R2

REB

DE

3

4

D5

6

GND

GND

7

R

D

SP3491

14

13

VCC

NC

12 A

11 B

10 Z

9Y

8 NC

REV 1.0.3

1/12

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