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DS8922AM 데이터시트(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 DS8922AM
상세설명  TRI-STATE RS-422 Dual Differential Line Driver and Receiver Pairs
PDF  14 Pages
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

DS8922AM 데이터시트(HTML) 4 Page - National Semiconductor (TI)

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Receiver Switching Characteristics
(
Figures 1, 2, 3)
Parameter
Conditions
Min
Typ
Max
Units
8922
8922A/23A
T
pLH
CL = 30 pF
12
22.5
20
ns
T
pHL
CL = 30 pF
12
22.5
20
ns
|T
pLH–T pHL|CL = 30 pF
0.5
5
3.5
ns
Skew (Channel to Channel)
CL = 30 pF
0.5
3.0
2.0
ns
T
pLZ
CL = 15 pF S2 Open
15
ns
T
pHZ
CL = 15 pF S1 Open
15
ns
T
pZL
CL = 30 pF S2 Open
20
ns
T
pZH
CL = 30 pF S1 Open
20
ns
Driver Switching Characteristics
Parameter
Conditions
Min
Typ
Max
Units
8922
8922A/23A
SINGLE ENDED CHARACTERISTICS (
Figures 4, 5, 6, 8)
T
pLH
CL = 30 pF
12
15
15
ns
T
pHL
CL = 30 pF
12
15
15
ns
T
TLH
CL = 30 pF
5
10
10
ns
T
THL
CL = 30 pF
5
10
10
ns
|T
pLH–T pHL|CL = 30 pF
0.5
ns
Skew
CL = 30 pF (Note 5)
0.5
5
3.5
ns
Skew (Channel to Channel)
0.5
3.0
2.0
ns
T
pLZ
CL = 30 pF
15
ns
T
pHZ
CL = 30 pF
15
ns
T
pZL
CL = 30 pF
20
ns
T
pZH
CL = 30 pF
20
ns
DIFFERENTIAL SWITCHING CHARACTERISTICS (Note 6), (
Figure 4)
T
pLH
CL = 30 pF
12
15
15
ns
T
pHL
CL = 30 pF
12
15
15
ns
|T
pLH–T pHL|CL = 30 pF
0.5
6.0
2.75
ns
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 VCC = 5V, TA = 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:
Where:
Tcp = Crossing Point
Tra, Trb, Tfa and Tfb are time measurements with respect to the input.
www.national.com
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