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8785 数据表(PDF) 5 Page - STMicroelectronics

部件名 8785
功能描述  짹15KV ESD-PROTECTED, 1mA, 3 TO 5.5V, 250KBPS, RS-232 TRANSCEIVER WITH STAND-BY
PDF  13 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

8785 数据表(HTML) 5 Page - STMicroelectronics

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ST3237E
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RECEIVER ELECTRICAL CHARACTERISTICS
(C1 -C4 =0.1µF tested at 3.3V±10%, VCC =3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA =25°C)
TIMING CHARACTERISTICS
(C1 -C4 =0.1µF tested at 3.3V±10%, VCC =3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA =25°C)
Transmitter Skew is measured at the transmitter zero cross points
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
IOL
Output Leakage Current
Receiver Disabled
EN=VCC
± 0.05
± 10
µA
VOL
Output Voltage Low
IOUT = 1mA
0.4
V
VOH
Output Voltage High
IOUT = -1mA
VCC-0.
6
VCC-0.1
V
VRIN
Receiver Input Voltage
Operating Range
-25
25
V
VRIL
RS-232 Input Threshold
Low
TA = 25°C
VCC = 3.3V
0.6
1.1
V
TA = 25°C
VCC = 5V
0.8
1.5
VRIH
RS-232 Input Threshold
High
TA = 25°C
VCC = 3.3V
1.5
2.4
V
TA = 25°C
VCC = 5V
1.2
2.4
VRIHYS Input Hysteresis
0.3
V
RRIN
Input Resistance
TA = 25°C
3
5
7
K
Ω
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
DR
Maximum Data Rate
RL =3KΩ
CL= 1000pF
one transmitter switching VHSCI=GND
250
Kbps
RL =3KΩ
CL= 250pF
one transmitter switching VHSCI=VCC
VCC= 3 to 4.5V
1000
Kbps
RL =3KΩ
CL= 1000pF
one transmitter switching VHSCI=VCC
VCC= 4.5 to 5.5V
1000
Kbps
tPHLR
tPLHR
Propagation Delay Input to
Output
RIN to ROUT
CL = 150pF
0.15
µs
tPHLR
tPLHR
Propagation Delay Input to
Output
RL =3kΩ
CL = 1000pF
VHSCI=VCC
VHSCI=GND
400
1000
ns
ns
tT_SKEW Transmitter Skew
|tPHL -tTLH|
VHSCI=GND
300
ns
|tPHL -tTLH|
VHSCI=VCC
50
ns
tR_SKEW Receiver Skew
|tPHL -tTLH|
100
ns
tOER
Receiver Output Enable
Time
Normal Operation
50
ns
tODR
Receiver Output Disable
Time
Normal Operation
120
ns
SRT
Transition Slew Rate
TA = 25°C RL = 3 to 7KΩ
VCC = 3.3V
measured from +3V to -3V or -3V to +3V
CL = 150pF to 1000pF
VHSCI=GND
CL = 150pF to 1000pF
VHSCI=VCC
CL = 150pF to 2500pF
VHSCI=GND
6
24
4
30
150
30
V/
µs
V/
µs
V/
µs



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