Pin 13 — RO
4
— Receiver 4 Output — If
Receiver 4 output is enabled, if RI
4
A > RI
4
B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI
4
A < RI
4
B by
200mV, Receiver 4 output is low.
Pin 14 — RI
4
A — Receiver 4 input A.
Pin 15 — RI
4
B — Receiver 4 input B.
Pin 16 — V
CC
— Positive Supply +3.00V < V
CC
< +3.60V
SP3489 PINOUT
Pin 1 — RI
1
B — Receiver 1 input B.
Pin 2 — RI
1
A — Receiver 1 input A.
Pin 3 — RO
1
— Receiver 1 Output — If
Receiver 1 output is enabled, if RI
1A
> RI
1
B by
200mV, Receiver output is high. If Receiver 1
output is enabled, and if RI
1
A < RI
1
B by 200mV,
Receiver 1 output is low.
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP3489
Truth Table (2).
Pin 5 — RO
2
— Receiver 2 Output — If
Receiver 2 output is enabled, if RI
2
A > RI
2
B by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI
2
A < RI
2
B by
200mV, Receiver 2 output is low.
Pin 6 — RI
2
A — Receiver 2 input A.
Pin 7 — RI
2
B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
Pin 9 — RI
3
B — Receiver 3 input B.
Pin 10 — RI
3
A — Receiver 3 input A.
Pin 11 — RO
3
— Receiver 3 Output — If
Receiver 3 output is enabled, if RI
3
A > RI
3
B by
200mV, Receiver 3 output is high. If Receiver 3
output is enabled, and if RI
3
A < RI
3
B 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 — RO
4
— Receiver 4 Output — If
Receiver 4 output is enabled, if RI
4
A > RI
4
B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI
4
A < RI
4
B by
200mV, Receiver 4 output is low.
Pin 14 — RI
4
A — Receiver 4 input A.
Pin 15 — RI
4
B — Receiver 4 input B.
Pin 16 — V
CC
— Positive Supply +3.00V < V
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
V
ID
≥
0.2V
–0.2V < V
ID
< +0.2V
V
ID
≤
0.2V
X
ENABLES
EN
1
/EN
2
or EN
3
/EN
4
H
H
H
L
OUTPUT
RO
H
X
L
Hi–Z
DIFFERENTIAL
A–B
V
ID
≥
0.2V
–0.2V < V
ID
< +0.2V
V
ID
≤
0.2V
X
EN
H
X
H
X
H
X
L
ENABLES
EN
X
L
X
L
X
L
H
OUTPUT
RO
H
H
X
X
L
L
Hi–Z
Table 1. SP3488 Truth Table
10/16/02
Table 2. SP3489 Truth Table
© Copyright 2002 Sipex Corporation
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
4
SIPEX [ SIPEX CORPORATION ]
