TRANSMITTER ELECTRICAL CHARACTERISTICS
(C1-C4= 0.1µF, VCC =5V±10%, TA= -40 to 85 oC, unless otherwise specified.
Typical Valus are referred to TA=25o
C)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
VTOUT Output Voltage Swing All Transmitter outputs are
loaded with 3KΩto GND ±5±7.8 V
ITIL Logic Pull-Up Current TIN = 0 V 15 200 µA
VTIL Input Logic Threshold Low 0.8 V
VTIH Input Logic Threshold High 2 V
SRTTransition Slew Rate TA=25o
C, VCC =5V,
R
L=3to7KΩ,
C
L
= 50 to 2500 pF (Note 1)
730V/
µ
s
D
R
Data 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
Note1:Measured from3Vto-3Vorfrom-3Vto3V.
Note 2: One trasmitter output is loaded with RL=3K
Ωto7KΩ,CL= 50to 1000pF
ELECTRICAL CHARACTERISTICS
(C1-C4= 0.1µF, VCC =5V±10% TA= -40to 85 oC, unlessotherwise specified.
Typical Valus are referred to TA=25o
C)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
ISUPPLY VCC Power Supply Current No Load, TA=25o
C 5 10 mA
RECEIVERELECTRICAL CHARACTERISTICS
(C1-C4= 0.1µF, VCC =5V±10%, TA= -40 to 85 oC, unless otherwise specified.
Typical Valus are referred to TA=25o
C)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
VRIN Receiver Input Voltage Operating
Range -30 30 V
RRIN RS-232 Input Resistance TA=25o
C, VCC =5V,
V
RIN =5V 357K
Ω
V
RIL RS-232 Input Logic Threshold Low TA=25o
C, VCC = 5 V 0.8 1.2 V
VRIH RS-232 Input Logic Threshold High TA=25o
C, VCC = 5 V 1.7 2.4 V
VRIHYS RS-232 Input Hysteresis VCC = 5 V 0.2 0.5 1 V
VROL TTL/CMOS Output Voltage Low IOUT = 3.2mA (to VCC) 0.4 V
VROH TTL/CMOS Output Voltage High IOUT = 1mA (to GND) 3.5 VCC-0.4 V
tdR Propagation Delay Time CL=150pF (Note 1) 0.3 1 µs
ISCR Receiver Output Short Circuit Current ±10 mA
Note1:RS-232INtoTTL-CMOSOUT(from50% to50%)
ST232
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