Datasheet

SN75177B, SN75178B
DIFFERENTIAL BUS REPEATERS
SLLS002C – D2606, JULY 1985 – REVISED FEBRUARY 1993
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–2
logic symbols
†
logic diagrams (positive logic)
SN75178B
EN
5
6
3
8
7
2
EN
A
B
T
Y
Z
SN75177B
Z
Y
T
B
A
EN
2
7
8
3
6
5
EN
SN75178B
SN75177B
Receiver Driver
5
6
Y
Z
3
8
7
2
EN
A
B
T
T
B
A
EN
2
7
8
3
Z
Y
6
5
DriverReceiver
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
schematics of inputs and outputs
960 Ω
NOM
GND
Output
V
CC
TYPICAL OF ALL DRIVER OUTPUTS
16.8 kΩ
NOM
Input
V
CC
EQUIVALENT OF EACH RECEIVER INPUT
Enable inputs: R
eq
= 8 kΩ NOM
Driver input: R
eq
= 3 kΩ NOM
Input
R
eq
V
CC
EQUIVALENT OF EACH INPUT
Output
85 Ω
NOM
V
CC
TYPICAL OF RECEIVER OUTPUT
960 Ω
NOM