SP488E Sipex, SP488E Datasheet - Page 3

• Manufacturer Part Number: SP488E
• Description: Enhanced Quad RS-485/RS-422 Line Receivers
• Manufacturer: Sipex

SP488E/489EDS/07
Figure 1. Timing Test Circuit
SP488 PINOUT
Pin 1 — RI
Pin 2 — RI
Pin 3 — RO
Receiver 1 output is enabled, if RI
200mV, Receiver output is high. If Receiver 1
output is enabled, and if RI
Receiver 1 output is low.
Pin 4 — EN — Receiver Output Enable. Please
refer to SP488E Truth Table (1).
Pin 5 — RO
If Receiver 2 output is enabled, if RI
by 200mV, Receiver 2 output is high. If
Receiver 2 output is enabled, and if RI
by 200mV, Receiver 2 output is low.
PINOUT
DI
GND
RI
RI
RI
RI
RO
RO
EN
1
1
2
2
1/4 SP486E
B
A
A
B
1
2
DRIVER
1
2
3
4
5
6
7
8
A
B
1
1
B — Receiver 1 input B.
A
—
1
2
1
2
— Receiver 1 Output — If
Receiver 1 input A.
— Receiver 2 Output —
54
100pF
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
100pF EN
1
A < RI
1/4 SP488E
SP488E
RCVR
3
4
EN
1
1
B by 200mV,
A > RI
2
16
15
14
13
12
11
10
2
9
A > RI
A < RI
V
RI
RI
RO
EN
RO
RI
RI
1
CC
ROn
C
B by
4
4
3
3
B
A
A
B
4
3
L
2
2
B
B
3
Figure 2. Enable/Disable Timing Test Circuit
Pin 6 — RI
Pin 7 — RI
Pin 8 — GND — Digital Ground.
Pin 9 — RI
Pin 10 — RI
Pin 11 — RO
Receiver 3 output is enabled, if RI
200mV, Receiver 3 output is high. If Receiver 3
output is enabled, and if RI
Receiver 3 output is low.
Pin 12 — EN — Receiver Output Enable. Please
refer to SP488E Truth Table (1).
EN
1
GND
RI
RI
/EN
RI
RI
RO
RO
RCVR
1
1
2
2
B
A
A
B
1
2
2
1
2
3
4
5
6
7
8
2
2
3
A — Receiver 2 input A.
B — Receiver 2 input B.
B — Receiver 3 input B.
3
A — Receiver 3 input A.
1
2
C
3
L
— Receiver 3 Output — If
© Copyright 2000 Sipex Corporation
1k
3
A < RI
SP489E
3
4
S
S
1
2
3
B by 200mV,
3
A > RI
1k
16
15
14
13
12
11
10
9
V
RI
RI
RO
EN
RO
RI
RI
CC
3
4
4
3
3
V
B by
B
A
3
A
B
4
3
/EN
CC
4