DS8922_15 Datasheet, PDF (5/20 Pages) Texas Instruments – TRI-STATE RS-422 Dual Differential Line Driver and Receiver Pairs

DS8922, DS8922A, DS8923A
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Driver Switching Characteristics
Parameter
Conditions
Min
Typ
SINGLE ENDED CHARACTERISTICS (Figure 4, Figure 5, Figure 6, and Figure 8)
T_pLH
CL = 30 pF
12
T_pHL
CL = 30 pF
12
T_TLH
CL = 30 pF
5
T_THL
CL = 30 pF
5
|T_pLH–T _pHL|
CL = 30 pF
0.5
Skew
CL = 30 pF ⁽¹⁾
0.5
Skew (Channel to Channel)
0.5
T_pLZ
CL = 30 pF
15
T_pHZ
CL = 30 pF
15
T_pZL
CL = 30 pF
20
T_pZH
CL = 30 pF
20
DIFFERENTIAL SWITCHING CHARACTERISTICS ⁽²⁾, (Figure 4)
T_pLH
CL = 30 pF
12
T_pHL
CL = 30 pF
12
|T_pLH–T _pHL|
CL = 30 pF
0.5
SNLS373B – JUNE 1998 – REVISED APRIL 2013
8922
Max
8922A/23A
15
15
15
15
10
10
10
10
5
3.5
3.0
2.0
15
15
15
15
6.0
2.75
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
(1) Difference between complementary outputs at the 50% point.
(2) 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:
input.
Where: Tcp = Crossing Point Tra, Trb, Tfa and Tfb are time measurements with respect to the
Switching Time Waveforms
AC Test Circuits and Switching Waveforms
Figure 1.
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