Electrical characteristics
ST485AB
Table 11.
Symbol
Driver switching characteristics (VCC = 4.5V to 5.5V, TA = -40 to 85°C, unless otherwise
specified. Typical values are referred to TA = 25°C, VCC = 5V) (See Note: 1, Note 3)
Parameter
Test conditions
Min. Typ. Max. Unit
tPLH
tPHL
tRPDS
tPZL
tPZH
tPHZ
tPLZ
Propagation Delay
CL = 15 pF
|tPLH - tPHL| Propagation delay skew CL = 15 pF
Output enable time
CRL = 15 pF, S1 Closed
Output enable time
CRL = 15 pF, S2 Closed
Output disable time
CRL = 15 pF, S2 Closed
Output disable time
CRL = 15 pF, S1 Closed
18 30 ns
0.5
2
ns
7 12 ns
7 12 ns
7 12 ns
7 12 ns
Note: 1 All currents into device pins are positive; all currents out of device pins are negative; all
voltages are referenced to device ground unless specified.
2 Applies to peak current. See typical Operating Characteristics.
3 tr=tf ≤6 ms.
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