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8339 Datasheet, PDF (4/13 Pages) STMicroelectronics – ±15KV ESD PROTECTED, LOW POWER RS-485/RS-422 TRANSCEIVER
◁
ST485E
DRIVER SWITCHING CHARACTERISTICS
(VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred to TA = 25°C)
(See Note 1)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
tPLH
tPHL
tSK
tTLH
tTHL
tPZH
tPZL
tPLZ
tPHZ
Propagation Delay Input to
Output
Output Skew to Output
Rise or Fall Time
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
RDIFF = 54Ω
(See Fig. 3 and 5)
RDIFF = 54Ω
(See Fig. 3 and 5)
RDIFF = 54Ω
(See Fig. 3 and 5)
CL = 100pF
(See Fig. 4 and 6)
CL = 100pF
(See Fig. 4 and 6)
CL = 15pF
(See Fig. 4 and 6)
CL = 15pF
(See Fig. 4 and 6)
CL1 = CL2 = 100pF
CL1 = CL2 = 100pF
CL1 = CL2 = 100pF
S2 = Closed
S1 = Closed
S1 = Closed
S2 = Closed
25
45
ns
2
5
ns
15
40
ns
35
50
ns
25
40
ns
25
40
ns
35
50
ns
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)
Symbol
Parameter
tPLH
tPHL
tSKD
Propagation Delay Input to
Output
Differential Receiver Skew
tPZH Output Enable Time
tPZL Output Enable Time
tPLZ Output Disable Time
tPHZ Output Disable Time
fMAX Maximum Data Rate
Test Conditions
RDIFF = 54Ω
CL1 = CL2 = 100pF
(See Fig. 3 and 7)
RDIFF = 54Ω
(See Fig. 3 and 7)
CRL = 15pF
(See Fig. 2 and 8)
CRL = 15pF
(See Fig. 2 and 8)
CRL = 15pF
(See Fig. 2 and 8)
CRL = 15pF
(See Fig. 2 and 8)
CL1 = CL2 = 100pF
S2 = Closed
S1 = Closed
S1 = Closed
S2 = Closed
Min. Typ. Max. Unit
110 130
ns
5
10
ns
11
35
ns
13
35
ns
13
35
ns
11
35
ns
5
Mbps
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.
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