ST3237 Просмотр технического описания (PDF) - STMicroelectronics
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ST3237 Datasheet PDF : 15 Pages
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ST3237
ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
ISUPPLY VCC Power Supply Current No Load VCC = 3V or 5.0V TA = 25°C
ISHDN Shutdown Supply Current SHDN=GND TA = 25°C
0.5
2
mA
1
10
µA
LOGIC INPUT ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VTIL
VTIH
IIL
IOL
VOL
VOH
Input Logic Threshold Low
(Note 1)
Input Logic Threshold High
(Note 1)
Input Leakage Current
Output Leakage Current
Output Voltage Low
Output Voltage High
T-IN, VHSCI, EN, SHDN
VCC = 3.3V
VCC = 5V
T-IN, VHSCI, EN, SHDN
Receiver Disabled
IOUT = 1.6mA
IOUT = -1mA
0.8
V
2
V
2.4
V
± 0.01 ± 1.0 µA
± 0.05 ± 10 µA
0.4
V
VCC-0.6 VCC-0.1
V
Note 1: Transmitter input hysteresis is typically 250mV
TRANSMITTER 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)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VTOUT
RTOUT
ISC
Output Voltage Swing
All Transmitter outputs are loaded with
3KΩ to GND
Transmitter Output
Resistance
VCC = V+ = V- = 0V
VOUT = ± 2V
Output Short Circuit Current
± 5 ± 5.4
V
3000
Ω
± 25 ± 60 mA
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)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VRIN
VRIL
Receiver Input Voltage
Operating Range
RS-232 Input Threshold
Low
VRIH RS-232 Input Threshold
High
VRIHYS Input Hysteresis
RRIN Input Resistance
TA = 25°C
TA = 25°C
TA = 25°C
TA = 25°C
VCC = 3.3V
VCC = 5V
VCC = 3.3V
VCC = 5V
TA = 25°C
-25
25
V
0.6
1.2
V
0.8
1.5
V
1.5
2.4
V
1.8
2.4
V
0.3
V
3
5
7
KΩ
4/15
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