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| ST3237E_06 Datasheet, PDF (6/17 Pages) STMicroelectronics – ± 15KV ESD-protected, 1μA, 3 to 5.5V, 250Kbps RS-232 Transceiver with stand-by | |||
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Electrical characteristics
3
Electrical characteristics
ST3237E
Table 4.
Symbol
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)
Parameter
Test conditions
Min. Typ. Max. Unit
ISUPPLY
ISHDN
VCC Power Supply
Current
SHDN=VCC, No Load
Shutdown Supply Current SHDN=GND, VT_IN=GND or VCC
0.3
1
mA
1
5
µA
Table 5.
Symbol
Logic input (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)
Parameter
Test conditions
Min. Typ. Max. Unit
Input Logic Threshold
VTIL
Low
(Note 1)
T-IN, VHSCI, EN, SHDN
0.8
V
VTIH
IIL
VHYS
Input Logic Threshold
High
Input Leakage Current
Transmitter Input
Hysteresis
VCC = 3.3V
2
T-IN, VHSCI, EN, SHDN
VCC = 5V
2.4
T-IN, VHSCI, EN, SHDN
V
± 1.0 µA
0.25
V
Note:
Transmitter input hysteresis is typically 250mV
Table 6.
Symbol
Transmitter (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)
Parameter
Test conditions
Min. Typ. Max. Unit
VTOUT
RTOUT
ISC
ITOL
Output voltage swing
All transmitter outputs are loaded with
3K⦠to GND
±5
Transmitter output
resistance
VCC = 0V, VOUT = ± 2V
300
Output short circuit current
Output leakage current
VCC = 0V or 3.3V to 5.5V
VOUT = ± 12V
Transmitters disable
± 5.4
V
10M
W
± 60
mA
± 25 µA
6/17
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