Datasheet

ST3232B, ST3232C
Electrical characteristics
DocID7454 Rev 12
5/18
3 Electrical characteristics
Table 4: Electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C,
unless otherwise specified. Typical values are referred to TA = 25 °C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
I
SUPPLY
V
CC
power supply current
No load, V
CC
= 3 V ± 10 %, T
A
= 25 °C
0.3
1
mA
No load, V
CC
= 5 V ± 10 %, T
A
= 25 °C
1
2
Table 5: Logic input (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise
specified. Typical values are referred to TA = 25 °C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
V
TIL
Input logic threshold low
T-IN
(1)
0.8
V
V
TIH
Input logic threshold high
V
CC
= 3.3 V
2
V
CC
= 5 V
2.4
I
IL
Input leakage current
T-IN
±0.01
±1
µA
Notes:
(1)
Transmitter input hysteresis is typically 250 mV.
Table 6: Transmitter (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V,
TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
V
TOUT
Output voltage swing
All transmitter outputs are loaded with 3 kΩ
to GND
±5
±5.4
V
R
TOUT
Transmitter output
resistance
V
CC
= V+ = V- = 0 V, V
OUT
= ±2 V
300
10
M
Ω
I
TSC
Output short circuit current
V
CC
= 3 V or 5 V, V
OUT
= ±12
± 60
mA
Table 7: Receiver (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C,
unless otherwise specified. Typical values are referred to TA = 25 °C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
V
RIN
Receiver input voltage operating range
-25
25
V
V
RIL
RS-232 Input threshold low
T
A
= 25 °C, V
CC
= 3.3 V
0.6
1.1
T
A
= 25 °C, V
CC
= 5 V
0.8
1.5
V
RIH
RS-232 Input threshold high
T
A
= 25 °C, V
CC
= 3.3 V
1.5
2.4
T
A
= 25 °C, V
CC
= 5 V
1.8
2.4
V
RIHYS
Input hysteresis
0.3
R
RIN
Input resistance
T
A
= 25 °C
3
5
7
kΩ
V
ROL
TTL/CMOS output voltage low
I
OUT
= 1.6 mA
0.4
V
V
ROH
TTL/CMOS output voltage high
I
OUT
= -1 mA
V
CC
- 0.6
V
CC
- 0.1