Electrical characteristics
ST485ER
4.3
Receiver switching characteristics
VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred
to TA = 25°C)
Table 8.
Symbol
Receiver switching characteristics
Parameter
Test conditions (1)
Min. Typ. Max. Unit
tPLH
tPHL
Propagation Delay Input RDIFF = 54ΩCL1 = CL2 = 100pF
to Output
(See Figure 4. and Figure 8.)
20
130 210
ns
tSKD
Differential Receiver
Skew
RDIFF = 54ΩCL1 = CL2 = 100pF
(See Figure 4. and Figure 8.)
13
ns
tPZH Output Enable Time
CRL = 15pFS1 = Closed
(See Fig. 2 and Figure 9.)
20 50 ns
tPZL Output Enable Time
CRL = 15pFS2 = Closed
(See Fig. 2 and Figure 9.)
20 50 ns
tPLZ Output Disable Time
CRL = 15pFS1 = Closed
(See Fig. 2 and Figure 9.)
20 50 ns
tPHZ Output Disable Time
CRL = 15pFS2 = Closed
(See Fig. 2 and Figure 9.)
20 50
fMAX Maximum Data Rate
2.5
1. All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are
referenced to device ground unless specified
ns
Mbps
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