ST232
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Table 4: Electrical Characteristics
(C1 - C4 = 0. 1µF, VCC = 5V ± 10% , TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Table 5: Transm itter Electric al Characteristic s
(C1 - C4 = 0. 1µF, VCC = 5V ± 10%, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Note 1: Measured from 3V to -3V o r from -3V to 3V.
Note2 : One transmitter outp ut is loaded with RL = 3K Ω to 7KΩ, CL = 50 to 1000p F
Table 6: Receiv er Electrical Charac teristics
(C1 - C4 = 0. 1µF, VCC = 5V ± 10%, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Note 1: RS-232 IN to TTL-CM OS OUT (from 50% to 50%)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
ISUPPLY VCC Power Supply Current No Load, TA = 25°C 5 10 mA
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VTOUT Output Voltage Swing All Transmitter outputs are loaded with
3KΩ to GND ± 5± 7.8 V
ITIL Input Leakage Current ± 40 µA
VTIL Input Logic Threshold Low 0.8 V
VTIH Input Logic Threshold High 2 V
SRTTransition Slew Rate TA = 25°C, VCC = 5V
RL = 3 to 7KΩ,C
L = 50 to 2500pF
(Note1)
730V/µs
DRData Rate (Note 2) 120 220 Kbits/s
RTOUT Transmitter Output
Resistance VCC = V+ = V- = 0V VOUT = ±
2V 300 Ω
ISC Transmitter Output Short
Circuit Current One TXOUT to GND ±10 ±60 mA
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VRIN Receiver Input Voltage
Operating Rang e -30 30 V
RRIN RS-232 Input Resistance TA = 25°C, VCC = 5 V, VRIN = 5V 357KΩ
VRIL RS-232 Input Logic
Threshold Low TA = 25°C, VCC = 5 V 0.8 1.2 V
VRIH RS-232 Input Logic
Threshold High TA = 25°C, VCC = 5 V 1.7 2.4 V
VRIHYS RS-232 Input Hysteresis VCC = 5V 0.2 0.5 1 V
VROL TTL/CMOS Output Voltage
Low IOUT = 3.2mA (to VCC)0.4V
VROH TTL/CMOS Output Voltage
High IOUT = -1mA (to GND) 3.5 VCC-0.4 V
tDR Receiver Propagation Delay CL = 150pF (Note 1) 0.3 1 µs
ISCR Receiver Output Short
Circuit Current ±10 mA