Datasheet

SN65ALS180, SN75ALS180
DIFFERENTIAL DRIVER AND RECEIVER PAIRS
SLLS052G – AUGUST 1987 – REVISED APRIL 2003
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SYMBOL EQUIVALENTS
DATA-SHEET
PARAMETER
TIA/EIA-422-B TIA/EIA-485-A
V
O
V
oa
, V
ob
V
oa
, V
ob
|V
OD1
| V
o
V
o
|V
OD2
| V
t
(R
L
= 100 Ω) V
t
(R
L
= 54 Ω)
|V
OD3
|
V
t
(test termination measurement 2)
V
test
V
tst
∆|V
OD
| ||V
t
| – |V
t
||
||V
t
| – |V
t
||
V
OC
|V
os
| |V
os
|
∆|V
OC
| |V
os
– V
os
|
|V
os
– V
os
|
I
OS
|I
sa
|, |I
sb
|
I
O
|I
xa
|, |I
xb
| I
ia
, I
ib
RECEIVERS
electrical characteristics over recommended ranges of common-mode input voltage, supply
voltage, and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN
TYP
†
MAX UNIT
V
IT+
Positive-going input threshold
voltage
V
O
= 2.7 V, I
O
= –0.4 mA 0.2 V
V
IT–
Negative-going input threshold
voltage
V
O
= 0.5 V, I
O
= 8 mA
–0.2
‡
V
V
hys
Hysteresis voltage (V
IT+
– V
IT–
) 60 mV
V
IK
Enable-input clamp voltage I
I
= –18 mA –1.5 V
V
OH
High-level output voltage V
ID
= 200 mV, I
OH
= –400 µA, See Figure 6 2.7 V
V
OL
Low-level output voltage V
ID
= –200 mV, I
OL
= 8 mA, See Figure 6 0.45 V
I
OZ
High-impedance-state output current V
O
= 0.4 V to 2.4 V ±20 µA
I
I
Line in
p
ut current
Other input = 0 V
V
I
= 12 V 1
mA
I
I
Line
input
current
(see Note 6)
V
I
= –7 V –0.8
mA
I
IH
High-level enable-input current V
IH
= 2.7 V 20 µA
I
IL
Low-level enable-input current V
IL
= 0.4 V –100 µA
r
i
Input resistance 12 kΩ
I
OS
Short-circuit output current V
ID
= 200 mV, V
O
= 0 –15 –85 mA
I
CC
Supply current No load
Receiver outputs enabled,
Driver inputs disabled
19 30
mA
CC
y
Outputs disabled 19 26
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
The algebraic convention, in which the less positive (more negative) limit is designated minimum, is used in this data sheet for common-mode
input voltage and threshold voltage levels only.
NOTE 6: This applies for both power on and power off. Refer to TIA/EIA-485-A for exact conditions.