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SP489AET Datasheet(PDF) 5 Page - Sipex Corporation

Part # SP489AET
Description  High Speed Quad RS-485/RS-422 Line Receivers
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP489AET Datasheet(HTML) 5 Page - Sipex Corporation

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SP488A/489ADS/07
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
5
SP489A PINOUT
Pin 1 — RI
1B — Receiver 1 input B.
Pin 2 — RI
1A — Receiver 1 input A.
Pin 3 — RO
1 — Receiver 1 Output — If Re-
ceiver 1 output is enabled, if RI
1A > RI1B
by
200mV, Receiver output is high. If Receiver 1
output is enabled, and if RI
1A < RI1B by 200mV,
Receiver 1 output is low.
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP489A Truth Table (2).
Pin 5 — RO
2 — Receiver 2 Output — If Re-
ceiver 2 output is enabled, if RI
2A > RI2B
by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI
2A < RI2B
by
200mV, Receiver 2 output is low.
Pin 6 — RI
2A — Receiver 2 input A.
Pin 7 — RI
2B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
Pin 9 — RI
3B — Receiver 3 input B.
Pin 10 — RI
3A — Receiver 3 input A.
Pin 11 — RO
3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI
3A > RI3B by
200mV, Receiver 3 output is high. If Receiver 3
output is enabled, and if RI
3A < RI3B
by
200mV, Receiver 3 output is low.
Pin 12 — EN3/EN4 — Receiver 3 and 4 Output
Enable. Please refer to SP489A Truth Table (2).
Pin 13 — RO
4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI
4A > RI4B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI
4A < RI4B
by
200mV, Receiver 4 output is low.
Pin 14 — RI
4A — Receiver 4 input A.
Pin 15 — RI
4B — Receiver 4 input B.
Pin 16 — Supply Voltage V
CC — 4.75V ≤ VCC
5.25V.
A
B
54
50pF
DI
1/4 SP486
1/4 SP488
50pF EN
EN
ROn
DRIVER
RCVR
CL
Figure 3. Timing Test Circuit
S1
RCVR
S2
VCC
1k
CL
1k
Figure 4. Enable/Disable Timing Test Circuit


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