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±9V
I
TIL Logic Pull-Up Current TIN =0V 5 40 µ
A
V
TIL Input Logic Threshold Low 0.8 1.4 V
VTIH Input Logic Threshold High 1.4 2 V
SRTTransition Slew Rate TA=25o
C, VCC =5V,
R
L=3to7KΩ,
C
L
= 50 to 2500 pF (Note 1)
61230V/
µ
s
D
R
Data Rate (Note 2) 200 400 Kbits/s
RTOUT Transmitter Output Resistance VCC = V+ = V- = 0V
VOUT =±2V 300 10M Ω
ISC Transmitter Output Short Circuit
Current one TXOUT to GND ±7±22 mA
tdT Propagation Delay Time TTL-CMOS IN to RS-232 OUT
CL= 150 pF (50% to 50%) 1.3 3.5 µs
Note1:Measured from3Vto-3Vor from-3Vto3V.
Note 2: One trasmitter output is loaded with RL=3KΩto7KΩ,CL= 50to1000pF
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 1.5 4 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, 357K
Ω
V
RIL RS-232 Input Logic Threshold Low 0.8 1.3 V
VRIH RS-232 Input Logic Threshold High 1.8 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) 0.2 0.4 V
VROH TTL/CMOS Output Voltage High IOUT = 1mA (to GND) 3.5 VCC-0.2 V
ISCR Receiver Output Short Circuit
Current to GND
to VCC 2
10 10
30 mA
mA
tdR Propagation Delay Time CL=150pF (Note 1) 0.1 0.5 µs
Note1:RS-232 INtoTTL-CMOSOUT(from50% to50%)
ST232A
3/10