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| ST3232EB Datasheet, PDF (6/19 Pages) STMicroelectronics – 250 kbps minimum guaranteed data rate | |||
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Electrical characteristics
ST3232EB - ST3232EC
Table 7.
Symbol
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)
Parameter
Test conditions
Min.
Typ. Max. Unit
VRIN
VRIL
VRIH
VRIHYS
RRIN
VROL
VROH
Receiver input voltage operating
range
RS-232 Input threshold low
RS-232 Input threshold high
Input hysteresis
TA = 25°C, VCC = 3.3V
TA = 25°C, VCC = 5V
TA = 25°C, VCC = 3.3V
TA = 25°C, VCC = 5V
Input resistance
TA = 25°C
TTL/CMOS Output voltage low IOUT = 1.6mA
TTL/CMOS Output voltage high IOUT = -1mA
-25
25
V
0.6
1.1
V
0.8
1.5
1.4
2.4
V
1.8
2.4
0.5
V
3
5
7
kΩ
0.4
V
VCC-0.6 VCC-0.1
V
Table 8.
Symbol
Timing characteristics (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)
Parameter
Test conditions
Min. Typ. Max. Unit
DR Data transfer rate
RL = 3KΩ, CL2= 1000pF
one transmitter switching
250
tPHLR Propagation delay input to
tPLHR output
RXIN = RXOUT, CL = 150pF
tOER Receiver output enable time Normal Operation
tODR Receiver output disable time Normal Operation
|tPHLT Transmitter propagation
- tTHL| delay difference
(Note 1)
|tPHLR Receiver propagation delay
- tTHR| difference
SRT Transition slew rate
TA = 25°C RL = 3kΩ to 7kΩ VCC = 3.3V
measured from +3V to -3V or -3V to +3V
CL = 150pF to 1000pF
6
CL = 150pF to 2500pF
4
0.15
50
50
200
50
Kbps
µs
ns
ns
ns
ns
30 V/µs
30 V/µs
Note: 1 Transmitter skew is measured at the transmitter zero cross points
6/19
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