4
SP486E/487EDS/06 SP486E/487E Enhanced Quad RS-485/RS-422 Line Drivers Copyright 2000 Sipex Corporation
PINOUT — SP487E
1
2
3
4
SP487E
DI
1
DO
1
A
DO
1
B
EN
1
/EN
2
DO
2
B
DO
2
A
DI
2
GND
V
CC
DI
4
DO
4
A
DO
4
B
EN
3
/EN
4
DO
3
B
DO
3
A
DI
3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SP487E PINOUT
Pin 1 — DI
— Driver 1 Input — If Driver 1
output is enabled, logic 0 on DI
forces driver
output DO
A low and DO
B high. A logic 1 on
DI
1
with Driver 1 output enabled forces driver
DO
1
A high and DO
1
B low.
Pin 2 — DO
1
A — Driver 1 output A.
Pin 3 — DO
1
B — Driver 1 output B.
Pin 4 — EN
/EN
— Driver 1 and 2 Output
Enable. Please refer to
SP487E
Truth Table (2).
Pin 5 — DO
2
B — Driver 2 output B.
Pin 6 — DO
2
A — Driver 2 output A.
Pin 7 — DI
— Driver 2 Input — If Driver 2
output is enabled, logic 0 on DI
forces driver
output DO
A low and DO
B high. A logic 1 on
DI
2
with Driver 2 output enabled forces driver
DO
2
A high and DO
2
B low.
Pin 8 — GND — Digital Ground.
Pin 9 — DI
— Driver 3 Input — If Driver 3
output is enabled, logic 0 on DI
forces driver
output DO
A low and DO
B high. A logic 1 on
DI
3
with Driver 3 output enabled forces driver
DO
3
A high and DO
3
B low.
Pin 10 — DO
3
A — Driver 3 output A.
INPUT
DI
ENABLES
EN
OUTPUTS
OUTA
EN
OUTB
H
H
X
H
L
L
H
X
L
H
H
X
L
H
L
L
X
L
L
H
X
L
H
Hi–Z
Hi–Z
Table 1. SP486E Truth Table
INPUT
DI
ENABLES
OUTPUTS
OUTA
EN1/EN2 or EN3/EN4
OUTB
H
H
H
L
L
H
L
H
X
L
Hi–Z
Hi–Z
Table 2. SP487E Truth Table
Pin 11 — DO
3
B — Driver 3 output B.
Pin 12 — EN
/EN
— Driver 3 and 4 Output
Enable. Please refer to
SP487E
Truth Table (2).
Pin 13 — DO
4
B — Driver 4 output B.
Pin 14 — DO
4
A — Driver 4 output A.
Pin 15 — DI
— Driver 4 Input — If Driver 4
output is enabled, logic 0 on DI
forces driver
output DO
A low and DO
B high. A logic 1 on
DI
4
with Driver 3 output enabled forces driver
DO
4
A high and DO
4
B low.
Pin 16 — Supply Voltage V
CC
— 4.75V
≤
V
CC
≤
5.25V.
FEATURES…
The
SP486E
and
SP487E
are low–power quad
differential line drivers meeting RS-485 and
RS-422 standards. The
SP486E
features active
high and active low common driver enable
controls; the
SP487E
provides independent,
active high driver enable controls for each pair
of drivers. The driver outputs are short–circuit
limited to 200mA. Data rates up to 10Mbps are
supported. Both are available in 16–pin plastic
DIP and SOIC packages.