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ST485BD Arkusz danych(PDF) 8 Page - STMicroelectronics

Numer części ST485BD
Szczegółowy opis  Low power RS-485/RS-422 transceiver
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Strona internetowa  http://www.st.com
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Electrical characteristics
ST485
8/19
4.2
Receiver switching characteristics
VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred
to TA = 25°C)
Table 7.
Receiver switching characteristics
Symbol
Parameter
Test conditions (1)
Value
Unit
-40 to 85 °C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
tPLH
tPHL
Propagation Delay Input
to Output
RDIFF = 54ΩCL1 = CL2 = 100pF
(See
Figure 4. and Figure 8.)
20
130
210
230
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
56
ns
tPZL
Output Enable Time
CRL = 15pFS2 = Closed
(See Fig. 2 and
Figure 9.)
20
50
56
ns
tPLZ
Output Disable Time
CRL = 15pFS1 = Closed
(See Fig. 2 and
Figure 9.)
20
50
56
ns
tPHZ
Output Disable Time
CRL = 15pFS2 = Closed
(See Fig. 2 and
Figure 9.)
20
50
56
ns
fMAX
Maximum Data Rate
2.5
2.5
Mbps
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


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