Datasheet

SN75ALS172A
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS121D – AUGUST 1990 – REVISED APRIL 1998
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
IK
Input clamp voltage I
I
= –18 mA –1.5 V
V
O
Output voltage I
O
= 0 0 6 V
|V
OD1
| Differential output voltage I
O
= 0 1.5 6 V
|V
OD2
|
Differential out
p
ut voltage
V
CC
= 5 V, R
L
= 100 Ω, See Figure 1 1/2 V
OD1
or 2
‡
V
|V
OD2
|
Differential
o
u
tp
u
t
v
oltage
R
L
= 54 Ω, See Figure 1 1.5 2.5 5
V
|V
OD3
| Differential output voltage See Note 2 1.5 5 V
∆|V
OD
|
Change in magnitude of
differential output voltage
§
R
L
= 54 Ω or 100 Ω, See Figure 1 ±0.2 V
V
OC
Common-mode output voltage
¶
R
L
= 54 Ω or 100 Ω, See Figure 1
3
–1
V
∆|V
OC
|
Change in magnitude of
common-mode output voltage
§
R
L
= 54 Ω or 100 Ω, See Figure 1 ±0.2 V
I
O
Output current with power off V
CC
= 0, V
O
= –7 V to 12 V ±100 µA
I
OZ
High-impedance-state
output current
V
O
= –7 V to 12 V ±100 µA
I
IH
High-level input current V
I
= 2.7 V 20 µA
I
IL
Low-level input current V
I
= 0.4 V –100 µA
I
OS
Short-circuit output current V
O
= –7 V to 12 V ±250 mA
I
CC
Su
pp
ly current (all drivers)
No load
Outputs enabled 36 55
mA
I
CC
S
u
ppl
y
c
u
rrent
(all
dri
v
ers)
No
load
Outputs disabled 15 30
mA
†
All typical values are at V
CC
= 5 V and T
A
= 25°C.
‡
The minimum V
OD2
with a 100-Ω load is either 1/2 V
OD1
or 2 V, whichever is greater.
§
∆|V
OD
| and ∆|V
OC
| are the changes in magnitude of V
OD
and V
OC
, respectively, that occur when the input is changed from a high level to a low
level.
¶
In ANSI Standard EIA/TIA-422-B, V
OC
, which is the average of the two output voltages with respect to ground, is called output offset voltage,
V
OS
.
NOTE 2: See EIA Standard RS-485, Figure 3-5, Test Termination Measurement 2.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
t
d(OD)
Differential-output delay time R
L
= 54 Ω, See Figure 2 9 15 22 ns
t
PZH
Output enable time to high level R
L
= 110 Ω, See Figure 3 30 45 70 ns
t
PZL
Output enable time to low level R
L
= 110 Ω, See Figure 4 25 40 65 ns
t
PHZ
Output disable time from high level R
L
= 110 Ω, See Figure 3 10 20 35 ns
t
PLZ
Output disable time from low level R
L
= 110 Ω, See Figure 4 10 30 45 ns
†
All typical values are at V
CC
= 5 V and T
A
= 25°C.