SP3488 Datasheet, PDF (4/9 Pages) Sipex Corporation – +3.3V Low Power Quad RS-485/RS-422 Line Receivers

Pin 13 — RO₄ — Receiver 4 Output — If
Receiver 4 output is enabled, if RI₄A > RI₄B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI₄A < RI₄B by
200mV, Receiver 4 output is low.
Pin 14 — RI₄A — Receiver 4 input A.
Pin 15 — RI B — Receiver 4 input B.
4
Pin 16 — V — Positive Supply +3.00V < V
CC
CC
< +3.60V
SP3489 PINOUT
Pin 1 — RI₁B — Receiver 1 input B.
Pin 2 — RI₁A — Receiver 1 input A.
Pin 3 — RO₁ — Receiver 1 Output — If
Receiver 1 output is enabled, if RI_1A > RI₁B by
200mV, Receiver output is high. If Receiver 1
output is enabled, and if RI A< RI B by 200mV,
1
1
Receiver 1 output is low.
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP3489 Truth Table (2).
Pin 5 — RO₂ — Receiver 2 Output — If
Receiver 2 output is enabled, if RI₂A > RI₂B by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI₂A < RI₂B by
200mV, Receiver 2 output is low.
Pin 6 — RI₂A — Receiver 2 input A.
Pin 7 — RI B — Receiver 2 input B.
2
Pin 8 — GND — Digital Ground.
DIFFERENTIAL
A–B
ENABLES
EN
EN
V_ID ≥ 0.2V
H
X
X
L
–0.2V < V_ID < +0.2V
H
X
X
L
V_ID ≤ 0.2V
H
X
X
L
X
L
H
Table 1. SP3488 Truth Table
OUTPUT
RO
H
H
X
X
L
L
Hi–Z
Pin 9 — RI₃B — Receiver 3 input B.
Pin 10 — RI₃A — Receiver 3 input A.
Pin 11 — RO₃ — Receiver 3 Output — If
Receiver 3 output is enabled, if RI₃A > RI₃B by
200mV, Receiver 3 output is high. If Receiver 3
output is enabled, and if RI₃A < RI₃B by
200mV, Receiver 3 output is low.
Pin 12 — EN3/EN4 — Receiver 3 and 4 Output
Enable. Please refer to SP3489 Truth Table (2).
Pin 13 — RO₄ — Receiver 4 Output — If
Receiver 4 output is enabled, if RI₄A > RI₄B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI₄A < RI₄B by
200mV, Receiver 4 output is low.
Pin 14 — RI₄A — Receiver 4 input A.
Pin 15 — RI₄B — Receiver 4 input B.
Pin 16 — V — Positive Supply +3.00V < V
CC
CC
< +3.60V
FEATURES...
The SP3488 and the SP3489 are +3.3V low
power quad line receivers that meet the
specifications of the RS-485 and RS-422 serial
protocols. These devices are pin-to-pin
compatible with Sipex's SP488 and SP489
devices as well as popular industry standards.
The SP3488 and SP3489 devices feature
Sipex's BiCMOS process allowing low power
operation without sacrificing performance.
The RS-485 standard is ideal for multi-drop
applications or for long distance interfaces.
RS-485 allows up to 32 drivers and 32 receivers
to be connected to a data bus, making it an ideal
choice for multi-drop applications. Since the
DIFFERENTIAL
A–B
ENABLES
OUTPUT
EN₁/EN₂ or EN₃/EN₄
RO
V_ID ≥ 0.2V
H
H
–0.2V < V_ID < +0.2V
H
X
V_ID ≤ 0.2V
H
L
X
L
Hi–Z
Table 2. SP3489 Truth Table
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
4
© Copyright 2002 Sipex Corporation