Full-Duplex RS-485 Transceivers
SP490 / SP491
Full-Duplex RS-485 Transceivers
Description
The SP490 is a low power differential line driver/receiver me...
Description
SP490 / SP491
Full-Duplex RS-485 Transceivers
Description
The SP490 is a low power differential line driver/receiver meeting RS-485 and RS-422 standards up to 5Mbps. The SP491 is identical to the SP490 with the addition of driver and receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over wide common mode range. The SP490 is available in 8-pin NSOIC packages for operation over the commercial temperature range. The SP491 is available in 14-pin NSOIC packages for operation over the commercial and industrial temperature ranges.
FEATURES ■■ 5V only ■■ Low power BiCMOS ■■ Driver/receiver enable (SP491) ■■ RS-485 and RS-422 drivers/receivers ■■ Pin compatible with LTC490 and SN75179
(SP490) ■■ Pin compatible with LTC491 and
SN75180 (SP491)
Ordering Information - Back Page
Block Diagrams
VCC 1 R2
R
D3 GND 4
D
SP490
8A 7B
6Z 5Y
NC 1
R2
REB DE
3 4
D5
6
GND GND
7
R D
SP491
14 13
VCC NC
12 A
11 B
10 Z 9Y 8 NC
...
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