DS8922M National Semiconductor, DS8922M Datasheet - Page 4

• Manufacturer Part Number: DS8922M
• Description: TRI-STATE RS-422 Dual Differential Line Driver and Receiver Pairs
• Manufacturer: National Semiconductor

www.national.com
SINGLE ENDED CHARACTERISTICS ( Figures 4, 5, 6, 8 )
T
T
T
T
|T
Skew
Skew (Channel to Channel)
T
T
T
T
DIFFERENTIAL SWITCHING CHARACTERISTICS (Note 6), ( Figure 4 )
T
T
|T
T
T
|T
Skew (Channel to Channel)
T
T
T
T
Receiver Switching Characteristics
Driver Switching Characteristics
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:
otherwise specified. All values shown as max or min are classified on absolute value basis.
Note 3: All typical values are V
Note 4: Only one output at a time should be shorted.
Note 5:
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:
Where:
( Figures 1, 2, 3 )
pLH
pHL
pLZ
pHZ
pZL
pZH
pLH
pHL
TLH
THL
pLZ
pHZ
pZL
pZH
pLH
pHL
pLH
pLH
pLH
Tcp = Crossing Point
Tra, Trb, Tfa and Tfb are time measurements with respect to the input.
–T
–T
–T
pHL
pHL
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
Parameter
pHL
Parameter
Difference between complementary outputs at the 50% point.
|
|
|
CC
= 5V, T
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF (Note 5)
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 15 pF S2 Open
CL = 15 pF S1 Open
CL = 30 pF S2 Open
CL = 30 pF S1 Open
A
= 25˚C.
Conditions
Conditions
Min
Min
4
Typ
0.5
0.5
Typ
12
12
15
15
20
20
0.5
0.5
0.5
0.5
12
12
15
15
20
20
12
12
5
5
8922
22.5
22.5
8922
3.0
3.0
6.0
15
15
10
10
15
15
5
5
Max
Max
8922A/23A
8922A/23A
2.75
3.5
2.0
3.5
2.0
20
20
15
15
10
10
15
15
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns