Datasheet

SN55ALS194, SN75ALS194
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS009D – OCTOBER 1985 – REVISED MAY 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SYMBOL EQUIVALENTS
DATA SHEET PARAMETER
EIA/TIA-422-B
V
O
V
oa
, V
ob
| V
OD1
| V
o
| V
OD2
| V
t
(R
L
= 100 Ω)
∆ | V
OD
| | |V
t
| – |V
t
| |
V
OC
| V
os
|
∆ | V
OC
| | V
os
– V
os
|
I
OS
|I
sa
|, |I
sb
|
I
O
|I
xa
| , |I
xb
|
PARAMETER MEASUREMENT INFORMATION
TEST CIRCUIT
VOLTAGE WAVEFORM
V
OH
V
OL
V
OL
V
OH
t
PHL
t
PLH
Skew
t
PHL
Input
1.5 V1.5 V
0 V
3 V
Z Output
Y Output
200 Ω
S1
5 V
See Note C
50 Ω
3 V
t
PLH
Generator
(see Note A)
C
L
= 15 pF
(see Note B)
1.5 V 1.5 V
Skew
1.5 V 1.5 V
NOTES: A. The input pulse is supplied by a generator having the following characteristics: t
r
≤ 5 ns, t
f
≤ 5 ns, PRR ≤ 1 MHz, duty cycle ≤ 50%,
Z
O
≈ 50 Ω.
B. C
L
includes probe and stray capacitance.
C. All diodes are 1N916 or 1N3064.
Figure 2. Test Circuit and Voltage Waveform
TEST CIRCUIT VOLTAGE WAVEFORM
3 V
0 V
Input
Output
t
t(OD)
10%
90%
t
t(OD)
R
L
= 100 Ω
C
L
C
L
3 V
50 Ω
Output
Generator
(see Note A)
C
L
= 15 pF
(see Note B)
NOTES: A. The input pulse is supplied by a generator having the following characteristics: t
r
≤ 5 ns, t
f
≤ 5 ns, PRR ≤ 1 MHz, duty cycle ≤ 50%,
Z
O
≈ 50 Ω.
B. C
L
includes probe and stray capacitance.
Figure 3. Differential-Output Test Circuit and Voltage Waveform
Figure 1. Driver V
OD
and V
OC
V
OC
2
R
L
V
OD2
2
R
L