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ST485E Datasheet(PDF) 4 Page - STMicroelectronics

Part No. ST485E
Description  ±5KV ESD PROTECTED, LOW POWER RS-485/RS-422 TRANSCEIVER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST485E Datasheet(HTML) 4 Page - STMicroelectronics

 
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ST485E
4/13
DRIVER SWITCHING CHARACTERISTICS
(VCC =5V ± 5%, TA =TMIN to TMAX , unless otherwise specified. Typical values are referred to TA =25°C)
(See Note 1)
Note 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.
RECEIVER SWITCHING CHARACTERISTICS
(VCC =5V ± 5%, TA =TMIN to TMAX , unless otherwise specified. Typical values are referred to TA = 25°C)
(See Note 1)
Note 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.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
tPLH
tPHL
Propagation Delay Input to
Output
RDIFF =54Ω
CL1 =CL2 = 100pF
(See Fig. 3 and 5)
25
45
ns
tSK
Output Skew to Output
RDIFF =54Ω
CL1 =CL2 = 100pF
(See Fig. 3 and 5)
25
ns
tTLH
tTHL
Rise or Fall Time
RDIFF =54Ω
CL1 =CL2 = 100pF
(See Fig. 3 and 5)
15
40
ns
tPZH
Output Enable Time
CL = 100pF
S2 = Closed
(See Fig. 4 and 6)
35
50
ns
tPZL
Output Enable Time
CL = 100pF
S1 = Closed
(See Fig. 4 and 6)
25
40
ns
tPLZ
Output Disable Time
CL = 15pF
S1 = Closed
(See Fig. 4 and 6)
25
40
ns
tPHZ
Output Disable Time
CL = 15pF
S2 = Closed
(See Fig. 4 and 6)
35
50
ns
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
tPLH
tPHL
Propagation Delay Input to
Output
RDIFF =54Ω
CL1 =CL2 = 100pF
(See Fig. 3 and 7)
110
130
ns
tSKD
Differential Receiver Skew
RDIFF =54Ω
CL1 =CL2 = 100pF
(See Fig. 3 and 7)
510
ns
tPZH
Output Enable Time
CRL = 15pF
S2 = Closed
(See Fig. 2 and 8)
11
35
ns
tPZL
Output Enable Time
CRL = 15pF
S1 = Closed
(See Fig. 2 and 8)
13
35
ns
tPLZ
Output Disable Time
CRL = 15pF
S1 = Closed
(See Fig. 2 and 8)
13
35
ns
tPHZ
Output Disable Time
CRL = 15pF
S2 = Closed
(See Fig. 2 and 8)
11
35
ns
fMAX
Maximum Data Rate
5
Mbps


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