ST485E(2007) 데이터 시트보기 (PDF) - STMicroelectronics
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ST485E Datasheet PDF : 19 Pages
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ST485E
Electrical characteristics
Table 6.
Symbol
DC Electrical characteristics (VCC = 5V ± 5%, TA = TMIN to TMAX, unless otherwise
specified. Typical values are referred to TA = 25°C)
Parameter
Test conditions (1)
Min. Typ. Max. Unit
IOSD2
Driver short-circuit current,
VO=Low
VO = -7 to 12V (3)
35
250 mA
IOSR Receiver short-circuit current VO = 0V to VCC
7
95 mA
1. All currents into device pins are positive; all 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.
Table 7.
Symbol
Driver switching characteristics (VCC = 5V ± 5%, TA = TMIN to TMAX, unless otherwise
specified. Typical values are referred to TA = 25°C)
Parameter
Test conditions (1)
Min. Typ. Max. Unit
tPLH
tPHL
tSK
tTLH
tTHL
tPZH
Propagation delay input to RDIFF = 54ΩCL1 = CL2 = 100pF
output
(See Figure 4. and Figure 6.)
Output skew to output
RDIFF = 54ΩCL1 = CL2 = 100pF
(See Figure 4. and Figure 6.)
Rise or fall time
RDIFF = 54Ω, CL1 = CL2 = 100pF (See
Figure 4. and Figure 6.)
Output enable time
CL = 100pF, S2 = Closed
(See Figure 5. and Figure 7.)
25 45 ns
2
5
ns
15 40 ns
35 50 ns
tPZL Output enable time
tPLZ Output disable time
tPHZ Output disable time
CL = 100pF, S1 = Closed
(See Figure 5. and Figure 7.)
CL = 15pF, S1 = Closed
(See Figure 5. and Figure 7.)
CL = 15pF, S2 = Closed
(See Figure 5. and Figure 7.)
25 40 ns
25 40 ns
35 50 ns
1. All currents into device pins are positive; all out of device pins are negative; all voltages are referenced to device ground
unless specified.
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