Datasheet

SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154B – MARCH 1993 – REVISED FEBRUARY 2001
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Function Tables
SN75ALS1177, SN75ALS1178
(each driver)
INPUT
ENABLE
OUTPUTS
D DE
Y Z
H H H L
L H L H
X L Z Z
SN75ALS1177
(each receiver)
DIFFERENTIAL
A–B
ENABLE
RE
OUTPUT
Y
V
ID
≥ 0.2 V L H
–0.2 V < V
ID
< 0.2 V L ?
V
ID
≤ –0.2 V L L
X H Z
Open L H
SN75ALS1178
(each receiver)
DIFFERENTIAL
A–B
OUTPUT
Y
V
ID
≥ 0.2 V H
–0.2 V < V
ID
< 0.2 V ?
V
ID
≤ –0.2 V L
Open H
H = High level, L = Low level,
? = Indeterminate, X = Irrelevant,
Z = High impedance (off)
logic symbol
†
SN75ALS1177
SN75ALS1178
15
1D
EN2
4
1R
3
EN
4
1DE
15
1D
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
EN1
12
DE
9
2D
2R
5
1Y
14
1Z
13
1A
2
1B
1
2Y
10
2Z
11
2A
6
2B
7
RE
2
2
1
1
1
1
1R
3
1Y
14
1Z
13
1A
2
1B
1
2Y
10
2Z
11
2A
6
2B
7
EN
12
2DE
9
2D
2R
5