If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
Driver Input Voltage
Output Voltage
Receiver Output Sink
Current
Receiver Input Voltage
Differential Input Voltage
M Package
N Package
Derate M Package
Derate N Package
7V
−0.5V to +7V
5.5V
50 mA
Storage Temperature
Range
Lead Temperature
(Soldering, 4 sec.)
Maximum Junction
Temperature
−65˚C to +165˚C
+260˚C
+260˚C
+150˚C
±
10V
±
12V
730 mW
1160 mW
9.3 mW/˚C above
+25˚C
5.8 mW/˚C above
+25˚C
Recommended Operating
Conditions
Min
Supply Voltage
Temperature (T
A
)
DS8921/DS8921A
DS8921AT
0
−40
70
+85
˚C
˚C
4.5
Max
5.5
Units
V
Maximum Package Power Dissipation
@
+25˚C
DS8921/DS8921A Electrical Characteristics
(Notes 2, 3, 4)
Symbol
RECEIVER
V
TH
V
HYST
R
IN
I
IN
V
OH
V
OL
I
SC
DRIVER
V
IH
V
IL
I
IL
I
IH
I
I
V
CL
V
OH
V
OL
I
OFF
|V
T
| – |VT |
V
T
|V
OS
– V
OS
|
I
SC
I
CC
V
CC
= MAX, V
OUT
= 0V
V
CC
= MAX, V
OUT
= Logic 0
−30
DRIVER and RECEIVER
35
mA
2.0
0.4
−150
V
CC
= MAX, V
IN
= 0.4V
V
CC
= MAX, V
IN
= 2.7V
V
CC
= MAX, V
IN
= 7.0V
V
CC
= MIN, I
IN
= −18 mA
V
CC
= MIN, I
OH
= −20 mA
V
CC
= MIN, I
OL
= +20 mA
V
CC
= 0V, V
OUT
Conditions
−7V
≤
V
CM
≤
+7V
−7V
≤
V
CM
≤
+7V
V
IN
= −7V, +7V
(Other Input = GND)
V
IN
= 10V
V
IN
= −10V
I
OH
= −400 µA
I
OL
= 8 mA
V
CC
= MAX, V
OUT
= 0V
Min
−200
15
4.0
Typ
Max
+200
Units
mV
mV
kΩ
±
35
70
6.0
3.25
−3.25
2.5
0.5
−15
2.0
0.8
−40
−200
20
100
−1.5
2.5
0.5
100
0.4
−100
mA
mA
V
V
mA
V
V
µA
µA
µA
V
V
V
µA
V
V
V
mA
= 5.5V
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2
DS8921/DS8921A/DS8921AT
Receiver Switching Characteristics
Figure 1(Figure 2)
Symbol
T
pLH
T
pHL
|T
pLH
–T
pHL
|
Conditions
C
L
= 30 pF
(Figures
1, 2
)
C
L
= 30 pF
(Figures
1, 2)
C
L
= 30 pF
(Figures
1, 2
)
0.5
5
3.5
5
ns
14
22.5
20
20
ns
Min
Typ
8921
14
22.5
Max
8921A
20
8921AT
20
ns
Units
Driver Switching Characteristics
SINGLE ENDED CHARACTERISTICS
(Figures
3, 4)
Symbol
T
pLH
T
pHL
T
TLH
T
THL
Skew
Conditions
C
L
= 30 pF
(Figures
3, 4)
C
L
= 30 pF
(Figures
3, 4)
C
L
= 30 pF
(Figures
7, 8)
C
L
= 30 pF
(Figures
7, 8)
CL = 30 pF
(Figures
3, 4)
1
5
3.5
3.5
ns
5
8
8
9.5
ns
5
8
8
9.5
ns
10
15
15
15
ns
Min
Typ
8921
10
15
Max
8921A
15
8921AT
15
ns
Units
Driver Switching Characteristics
(Note 6)
DIFFERENTIAL CHARACTERISTICS
(Figures
3, 5)
Symbol
T
pLH
T
pHL
|T
pLH
–T
pHL
|
Conditions
C
L
= 30 pF
(Figures
3, 5, 6)
C
L
= 30 pF
(Figures
3, 5, 6)
C
L
= 30 pF
(Figures
3, 5, 6)
Note 1:
“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device
should be operated at these limits. The Table of “Electrical Characteristics” provides conditions for actual device operation.
Note 2:
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.
Note 3:
All typical values are V
CC
= 5V, T
A
= 25˚C.
Note 4:
Only one output at a time should be shorted.
Note 5:
Difference between complementary outputs at the 50% point.
Note 6:
Differential Delays are defined as calculated results from single ended rise and fall time measurements. This approach in establishing AC performance
specifications has been taken due to limitations of available Automatic Test Equipment (ATE).
The calculated ATE results assume a linear transition between measurement points and are a result of the following equations:
Min
Typ
8921
10
10
0.5
15
15
6
Max
8921A
15
15
2.75
8921AT
15
15
2.75
Units
ns
ns
ns
Where: T
cr
= Crossing Point
T
ra
, T
rb
, T
fa
and T
fb
are time measurements with respect to the input. See
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