SP487 SIPEX [Sipex Corporation], SP487 Datasheet - Page 3

• Manufacturer Part Number: SP487
• Description: Quad RS-485/RS-422 Line Drivers
• Manufacturer: SIPEX [Sipex Corporation]

PINOUT — SP486
SP486 PINOUT
Pin 1 — DI
enabled, logic 0 on DI
and DO
enabled forces driver DO
Pin 2 — DO
Pin 3 — DO
Pin 4 — EN — Driver Output Enable. Please refer to
SP486 Truth Table (1).
Pin 5 — DO2B — Driver 2 output B.
Pin 6 — DO
Pin 7 — DI
enabled, logic 0 on DI
and DO
enabled forces driver DO
Figure 1. Driver DC Test Load
SP486/487
1
2
B high. A logic 1 on DI
B high. A logic 1 on DI
DO
DO
DO
DO
A
B
GND
DI
EN
DI
1
1
2
2
1
2
A
B
B
A
V
1
2
— Driver 1 Input — If Driver 1 output is
— Driver 2 Input — If Driver 2 output is
1
1
2
A — Driver 1 output A.
B — Driver 1 output B.
A — Driver 2 output A.
DO
1
2
3
4
5
6
7
8
1
2
1
2
forces driver output DO
forces driver output DO
1
2
A high and DO
A high and DO
R
R
1
2
with Driver 1 output
with Driver 2 output
SP486
3
4
V
OC
1
2
16
15
14
13
12
11
10
9
B low.
B low.
Quad RS-485/RS-422 Line Drivers
1
2
V
DI
DO
DO
EN
DO
DO
DI
A low
A low
CC
4
3
4
4
3
3
A
B
B
A
3
Figure 3. Driver Timing Test Load
Pin 8 — GND — Digital Ground.
Pin 9 — DI
enabled, logic 0 on DI
and DO
enabled forces driver DO
Pin 10 — DO
Pin 11 — DO
Pin 12 — EN — Driver Output Disable. Please refer
to SP486 Truth Table (1).
Pin 13 — DO
Pin 14 — DO
Pin 15 — DI
is enabled, logic 0 on DI
low and DO
output enabled forces driver DO
low.
Figure 2. Driver Timing Test
UNDER TEST
DI
OUTPUT
3
B high. A logic 1 on DI
3
— Driver 3 Input — If Driver 3 output is
4
4
B high. A logic 1 on DI
EN
EN
DRIVER
— Driver 4 Input — If Driver 4 output
3
3
4
4
A — Driver 3 output A.
B — Driver 3 output B.
B — Driver 4 output B.
A — Driver 4 output A.
C
3
L
forces driver output DO
4
500 ohms
3
forces driver output DO
© Copyright 2000 Sipex Corporation
A high and DO
A
B
3
with Driver 3 output
4
A high and DO
R
4
DIFF
with Driver 3
S
S
C
C
1
2
3
L1
L2
B low.
3
V
A low
CC
4
4
A
B