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SP3483EN-L/TR

+3.3V Low Power Slew Rate Limited Half-Duplex RS-485 Transceiver

Exar Corporation 

SP3483

+3.3V Low Power Slew Rate Limited

Half-Duplex RS-485 Transceiver

• RS-485 and RS-422 Transceiver

• Operates from a single +3.3V Supply

• Interoperable with +5.0V logic

• Driver/Receiver Enable

• Low Power Shutdown mode

• -7V to +12V Common-Mode Input Voltage Range

• Allows up to 32 transceivers on the serial bus

• Compatibility with the industry standard

75176 pinout

• Driver Output Short-Circuit Protection

• Slew Rate Limited Driver for Low EMI

DESCRIPTION

The SP3483 device is part of a family of +3.3V low power half-duplex transceivers that meet

the specifications of the RS-485 and RS-422 serial protocols. This device is pin-to-pin compat-

ible with the Exar SP483 device as well as popular industry standards. The SP3483 features

Exar's BiCMOS design allowing low power operation without sacrificing performance. The

SP3483 is slew rate limited to reduce EMI and can meet the requirements of the RS-485

and RS-422 protocols up to 250kbps.

TRUTH TABLES

INPUTS

RE DE DI

X 11

X 10

X 0X

LINE

CONDITION

No Fault

No Fault

X

OUTPUTS

B

A

0

1

1

0

Z

Z

Table 1. Transmit Function Truth Table

INPUTS

RE DE

00

00

00

10

A-B

+0.2V

-0.2V

Inputs Open

X

OUTPUTS

R

1

0

1

Z

Table 2. Receive Function Truth Table

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com



SP3483_100_010912

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