DS8921AM-NOPB Datasheet, PDF (4/15 Pages) Texas Instruments – DS8921/DS8921A/DS8921AT Differential Line Driver and Receiver Pair

DS8921, DS8921A, DS8921AT
SNLS374C – MAY 1998 – REVISED APRIL 2013
Driver Switching Characteristics (continued)
SINGLE ENDED CHARACTERISTICS
Symbol
Conditions
Min
Typ
(Figure 3 and Figure 4)
T_TLH
C_L = 30 pF
5
(Figure 7 and Figure 8)
T_THL
C_L = 30 pF
5
(Figure 7 and Figure 8)
Skew
CL = 30 pF⁽¹⁾
1
(Figure 3 and Figure 4)
(1) Difference between complementary outputs at the 50% point.
Driver Switching Characteristics⁽¹⁾
DIFFERENTIAL CHARACTERISTICS
Symbol
Conditions
Min
Typ
T_pLH
C_L = 30 pF
10
(Figure 3, Figure 5, and
Figure 6)
T_pHL
C_L = 30 pF
10
(Figure 3, Figure 5, and
Figure 6)
|T_pLH–T _pHL|
C_L = 30 pF
0.5
(Figure 3, Figure 5, and
Figure 6)
8921
8
8
5
8921
15
15
6
Max
8921A
8
8
3.5
Max
8921A
15
15
2.75
8921AT
9.5
9.5
3.5
8921AT
15
15
2.75
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Units
ns
ns
ns
Units
ns
ns
ns
(1) 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:
T_cr = Crossing Point T_ra, T_rb, T_fa and T _fb are time measurements with respect to the input. See Figure 6.
Where:
AC Test Circuits and Switching Diagrams
Figure 1.
4
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