ST3243CPR Ver la hoja de datos (PDF) - STMicroelectronics
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ST3243CPR Datasheet PDF : 14 Pages
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ST3243
TRANSMITTER 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
VTOUT
ROUT
ISC
VOT
Output Voltage Swing
All Transmitter outputs are loaded with
3KΩ to GND
Output Resistance
VCC = V+ = V- = 0V
VOUT = ± 2V
Output Short Circuit Current
Transmitter Output Voltage T1IN = T2IN = GND, T3IN = VCC
T3OUT loaded with 3KΩ to GND
± 5 ± 5.4
V
300 10M
Ω
± 35 ± 60 mA
±5
V
T1OUT and T2OUT loaded with 2.5mA
each
RECEIVER 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
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 = 5.0V
VCC = 3.3V
VCC = 5.0V
TA = 25°C
-25
25
V
0.6
1.2
V
0.8
1.2
1.5
2.4
V
1.8
2.4
0.5
V
3
5
7
KΩ
TIMING 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.
DR Maximum Data Rate
RL = 3KΩ CL= 1000pF
one transmitter switching
250 400
tPHL Receiver Propagation Delay RIN to ROUT
tPLH
CL = 150pF
0.15
tT_SKEW Transmitter Skew
100
tR_SKEW Receiver Skew
50
tINVH Receiver Positive or
1
negative Threshold to
INVALID HIGH
tINVL Receiver Positive or
30
negative Threshold to
INVALID LOW
SRT Transition Slew Rate
TA = 25°C RL = 3K to 7KΩ VCC = 3.3V
measured from +3V to -3V or -3V to +3V
CL = 150pF to 1000pF
6
CL = 150pF to 2500pF
4
Max.
30
30
Unit
Kbps
µs
ns
ns
µs
µs
V/µs
V/µs
5/14
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