Datasheet

DS8921, DS8921A, DS8921AT
www.ti.com SNLS374C –MAY 1998–REVISED APRIL 2013
DS8921/DS8921A Electrical Characteristics
(1)(2)(3)
Symbol Conditions Min Typ Max Units
RECEIVER
V
TH
−7V ≤ V
CM
≤ +7V −200 ±35 +200 mV
V
HYST
−7V ≤ V
CM
≤ +7V 15 70 mV
R
IN
V
IN
= −7V, +7V 4.0 6.0 kΩ
(Other Input = GND)
I
IN
V
IN
= 10V 3.25 mA
V
IN
= −10V −3.25 mA
V
OH
I
OH
= −400 μA 2.5 V
V
OL
I
OL
= 8 mA 0.5 V
I
SC
V
CC
= MAX, V
OUT
= 0V −15 −100 mA
DRIVER
V
IH
2.0 V
V
IL
0.8 V
I
IL
V
CC
= MAX, V
IN
= 0.4V −40 −200 μA
I
IH
V
CC
= MAX, V
IN
= 2.7V 20 μA
I
I
V
CC
= MAX, V
IN
= 7.0V 100 μA
V
CL
V
CC
= MIN, I
IN
= −18 mA −1.5 V
V
OH
V
CC
= MIN, I
OH
= −20 mA 2.5 V
V
OL
V
CC
= MIN, I
OL
= +20 mA 0.5 V
I
OFF
V
CC
= 0V, V
OUT
= 5.5V 100 μA
|V
T
| – |VT | 0.4 V
V
T
2.0 V
|V
OS
– V
OS
| 0.4 V
I
SC
V
CC
= MAX, V
OUT
= 0V −30 −150 mA
DRIVER and RECEIVER
I
CC
V
CC
= MAX, V
OUT
= Logic 0 35 mA
(1) All currents into device pins are shown as positive values; all currents out of the device are shown as negative; all voltages are
referenced to ground unless otherwise specified. All values shown as max or min are classified on absolute value basis.
(2) All typical values are V
CC
= 5V, T
A
= 25°C.
(3) Only one output at a time should be shorted.
Receiver Switching Characteristics
Symbol Conditions Min Typ Max Units
8921 8921A 8921AT
T
pLH
C
L
= 30 pF 14 22.5 20 20 ns
(Figure 1 and Figure 2 )
T
pHL
C
L
= 30 pF 14 22.5 20 20 ns
(Figure 1 and Figure 2)
|T
pLH
–T
pHL
| C
L
= 30 pF 0.5 5 3.5 5 ns
(Figure 1 and Figure 2 )
Driver Switching Characteristics
SINGLE ENDED CHARACTERISTICS
Symbol Conditions Min Typ Max Units
8921 8921A 8921AT
T
pLH
C
L
= 30 pF 10 15 15 15 ns
(Figure 3 and Figure 4)
T
pHL
C
L
= 30 pF 10 15 15 15 ns
Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: DS8921 DS8921A DS8921AT