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ST3485ECDR Scheda tecnica(PDF) 8 Page - STMicroelectronics

Il numero della parte ST3485ECDR
Spiegazioni elettronici  3.3V Powered, 15KV ESD protected, Up to 12Mbps RS-485/RS-422 transceiver
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST3485ECDR Scheda tecnica(HTML) 8 Page - STMicroelectronics

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Electrical characteristics
ST3485E
8/22
Note:
1
V
OD and VOC are the changes in VOD and VOC, respectively, when the DI input changes
state.
2
Measured on |tPLH(A)-tPHL(A)| and |tPLH(B)-tPHL(B)|
3
The transceivers are put into shutdown by bring RE high and DE low. If the input are in state
for less than 80ns, the part are guaranteed not to enter shutdown. If the inputs are in this
state for at least 300ns, the parts are guaranteed to have entered shutdown.
Table 11.
Receiver switching characteristics
VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred
to Ta = 25°C)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
tPLH
tPHL
Propagation delay
VID =0V to 3V, CL1 = 15pF
(Figure 12. and Figure 13.)
30
50
ns
tRPDS
|tPLH - tPHL| Propagation
delay skew
VID =0V to 3V, CL1 = 15pF
(Figure 12. and Figure 13.)
13
ns
tPZL
Output enable time
CRL = 15pF, (Figure 14. and Figure 18.)10
20
ns
tPZH
Output enable time
CRL = 15pF, (Figure 14. and Figure 18.)10
20
ns
tPHZ
Output disable time
CRL = 15pF, (Figure 14. and Figure 18.)10
20
ns
tPLZ
Output disable time
CRL = 15pF, (Figure 14. and Figure 18.)10
20
ns
tZH(SHDN)
Receiver enable from
shutdown to output high
CRL = 15pF, (Figure 14. and Figure 18.)10
20
ns
tZL(SHDN)
Receiver enable from
shutdown to output low
CRL = 15pF, (Figure 14. and Figure 18.)20
40
µs


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