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ST485ER View Datasheet(PDF) - STMicroelectronics

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ST485ER
Electrical characteristics
Table 6.
Symbol
DC Electrical characteristics
Parameter
Test conditions (1)
Min. Typ. Max. Unit
ICC
IOSD1
IOSD2
IOSR
No load supply current (2)
Driver short-circuit current,
VO=High
Driver short-circuit current,
VO=Low
Receiver short-circuit
current
VRE = 0V or VCC
VDE = VCC
VDE = 0V
VO = -7 to 12V (3)
VO = -7 to 12V (3)
VO = 0V to VCC
400 900 µA
300 500 µA
35
250 mA
35
250 mA
7
95 mA
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.
2. Supply current specification is valid for loaded transmitters when VDE = 0V
3. Applies to peak current. See typical Operating Characteristics.
4.2
Driver switching characteristics
VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred
to TA = 25°C
Table 7.
Symbol
Driver switching characteristics
Parameter
Test conditions (1)
Min. Typ. Max. Unit
tPLH
tPHL
tSK
Propagation Delay Input
to Output
Output Skew to Output
RDIFF = 54CL1 = CL2 = 100pF
(See Figure 4. and Figure 6.)
RDIFF = 54CL1 = CL2 = 100pF
(See Figure 4. and Figure 6.)
tTLH
tTHL
Rise or Fall Time
RDIFF = 54CL1 = CL2 = 100pF
(See Figure 4. and Figure 6.)
tPZH Output Enable Time
CL = 100pFS2 = Closed
(See Figure 5. and Figure 7.)
tPZL Output Enable Time
CL = 100pFS1 = Closed
(See Figure 5. and Figure 7.)
tPLZ Output Disable Time
CL = 15pFS1 = Closed
(See Figure 5. and Figure 7.)
tPHZ Output Disable Time
CL = 15pFS2 = Closed
(See Figure 5. and Figure 7.)
10 30 60 ns
5 10 ns
3 15 40 ns
70 90 ns
70 90 ns
70 90 ns
70 90 ns
CAB Output AB Capacitance
43
pF
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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