ST3232E
4/11
RECEIVER ELECTRICAL CHARACTERISTICS
(C
1
-C
4
= 0.1µF tested at V
CC
= 3V to 5.5V, T
A
= -40 to 85°C, unless otherwise specified.
Typical values are referred to T
A
=25°C)
TIMING CHARACTERISTICS
(C
1
-C
4
= 0.1µF, V
CC
= 3V to 5.5V, T
A
= -40 to 85°C, unless otherwise specified.
Typical values are referred to T
A
=25°C)
Transmitter Skew is measured at the transmitter zero cross points
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°CV
CC
= 3.3V 0.6 1.1 V
T
A
=25°CV
CC
= 5V 0.8 1.5
V
RIH
RS-232 Input Threshold
High
T
A
=25°CV
CC
= 3.3V 1.4 2.4 V
T
A
=25°CV
CC
= 5V 1.8 2.4
V
RIHYS
Input Hysteresis 0.5 V
R
RIN
Input Resistance T
A
=25°C357KΩ
V
ROL
TTL/CMOS Output Voltage
Low
I
OUT
= 1.6mA 0.4 V
V
ROH
TTL/CMOS Output Voltage
High
I
OUT
= -1mA V
CC
-0.6 V
CC
-0.1 V
Symbol Parameter Test Conditions Min. Typ. Max. Unit
D
R
Data Transfer Rate R
L
=3KΩ C
L2
= 1000pF
one trasmitter switching
250 Kbps
t
PHLR
t
PLHR
Propagation Delay Input to
Output
R
XIN
=R
XOUT
C
L
= 150pF 0.15 µs
t
OER
Receiver Output Enable
Time
Normal Operation 50 ns
t
ODR
Receiver Output Disable
Time
Normal Operation 50 ns
|t
PHLT
-t
THL
|
Transmitter Propagation
Delay Difference
(Note 1) 200 ns
|t
PHLR
-t
THR
|
Receiver Propagation Delay
Difference
50 ns
S
RT
Trnasition Slew Rate T
A
=25°CR
L
=3KΩto 7K
Ω
V
CC
= 3.3V
measured from +3V to -3V or -3V to +3V
C
L
= 150pF to 1000pF
C
L
= 150pF to 2500pF
6
4
30
30
V/µs
V/µs
