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| DS78C120 Datasheet, PDF (3/9 Pages) National Semiconductor (TI) – Dual CMOS Compatible Differential Line Receiver | |||
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Electrical Characteristics (Notes 3, 4) (Continued)
Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown
as max or min on absolute value basis.
Note 5: Only one output at a time should be shorted.
Note 6: Refer to EIA-RS422 for exact conditions.
Switching Characteristics
VCC = 5V, TA = 25ËC
Symbol
Parameter
tpd0(D)
tpd1(D)
tpd0(S)
tpd1(S)
Differential Input to â0â Output
Differential Input to â1â Output
Strobe Input to â0â Output
Strobe Input to â1â Output
Conditions
Min
Typ
Max
Units
CL = 50 pF
CL = 50 pF
CL = 50 pF
CL = 50 pF
60
100
ns
100
150
ns
30
70
ns
100
150
ns
AC Test Circuit and Switching Time Waveforms
Differential and Strobe Input Signal
*Includes probe and test fixture capacitance
DS005801-3
tr = tf ⤠10 ns
PRR = 1 MHz
Note: Optimum switching response is obtained by minimizing stray capacitance on Response Control pin (no external connection).
DS005801-4
3
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