ST485BD 데이터 시트보기 (PDF) - STMicroelectronics
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ST485BD Datasheet PDF : 19 Pages
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ST485
Electrical characteristics
Table 5. DC Electrical characteristics
Symbol
Parameter
Test conditions (1)
Value
-40 to 85 °C
-55 to 125 °C Unit
Min Typ Max Min Max
ICC
IOSD1
IOSD2
IOSR
No Load Supply Current
(2)
VRE = 0V or VCC
VDE = VCC
VDE = 0V
Driver Short-Circuit
Current, VO=High
VO = -7 to 12V (3)
Driver Short-Circuit
Current, VO=Low
VO = -7 to 12V (3)
Receiver Short-Circuit
Current
VO = 0V to VCC
400 900
300 500
900 µA
500 µA
35
250 35 250 mA
35
250 35 250 mA
7
95 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.
4.1
Driver switching characteristics
VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred
to TA = 25°C
Table 6. Driver switching characteristics
Symbol
Parameter
Test conditions (1)
Value
-40 to 85 °C
-55 to 125°C Unit
Min. Typ. Max. Min. Max.
tPLH
tPHL
tSK
tTLH
tTHL
tPZH
Propagation Delay
Input to Output
RDIFF = 54ΩCL1 = CL2 = 100pF
(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 = 54ΩCL1 = CL2 = 100pF
(See Figure 4. and Figure 6.)
Output Enable Time
CL = 100pFS2 = Closed
(See Figure 5. and Figure 7.)
10 30 60
70 ns
5 10
10 ns
3 15 40
3
45 ns
70 90
90 ns
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.)
70 90
70 90
70 90
90 ns
90 ns
90 ns
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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