ADM222/ADM232A/ADM242–SPECIFICATIONS
Parameter
RS-232 TRANSMITTERS
Output Voltage Swing
Input Logic Threshold Low, V
INL
Input Logic Threshold High, V
INH
Logic Pull-Up Current
Data Rate
Output Resistance
Output Short Circuit Current (Instantaneous)
RS-232 RECEIVERS
RS-232 Input Voltage Range
RS-232 Input Threshold Low
RS-232 Input Threshold High
RS-232 Input Hysteresis
RS-232 Input Resistance
TTL/CMOS Output Voltage Low, V
OL
TTL/CMOS Output Voltage High, V
OH
TTL/CMOS Output Short-Circuit Current
TTL/CMOS Output Short-Circuit Current
TTL/CMOS Output Leakage Current
EN
Input Threshold Low, V
INL
EN
Input Threshold High, V
INH
POWER SUPPLY
Power Supply Current
Shutdown Power Supply Current
SHDN
Input Leakage Current
SHDN
Input Threshold Low, V
INL
SHDN
Input Threshold High, V
INH
AC CHARACTERISTICS
Transition Region Slew Rate
Transmitter Propagation Delay TTL to RS-232
Receiver Propagation Delay RS-232 to TTL
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Output Enable Time
Transmitter Output Disable Time
Transmitter + to – Propagation Delay Difference
Receiver + to – Propagation Delay Difference
*Guaranteed
by design, not production tested.
Specifications subject to change without notice.
(V
CC
= 5 V 10%. C1–C4 = 0.1 F; all spec-
ifications T
MIN
to T
MAX
unless otherwise noted.)
Min
±
5
2.4
200
300
Typ
±
9
1.7
1.7
12
±
10
Max
Unit
V
Test Conditions/Comments
All Transmitter Outputs Loaded with
3 kΩ to Ground
T
IN
T
IN
T
IN
= 0 V
V
CC
= V+ = V– = 0 V, V
OUT
=
±
2 V
0.8
40
V
V
µA
kB/s
Ω
mA
V
V
V
V
kΩ
V
V
mA
mA
µA
V
V
mA
mA
µA
µA
V
V
V/µs
µs
µs
µs
µs
ns
ns
µs
µs
ns
ns
–30
0.8
0.2
3
3.5
–2
10
+30
1.2
1.6
0.4
5
0.05
–85
35
±
0.05
1.4
1.4
4
13
0.1
1.4
1.4
8
0.85
1.0
0.1
0.3
125
160
250
3.5
150
200
2.4
1.0
7
0.4
±
10
0.8
V
CC
= 5 V
T
A
= 0°C to 85°C
I
OUT
= 3.2 mA
I
OUT
= –1.0 mA
Source Current (V
OUT
= GND)*
Sink Current (V
OUT
= V
CC
)*
SHDN
= GND/EN = V
CC
0 V
≤
V
OUT
≤
V
CC
2.0
8
10
±
1
0.8
No Load
3 kΩ Load on Both Outputs
2.0
3
30
3.5
3.5
0.5
0.5
500
500
C
L
= 50 pF to 1000 pF, R
L
= 3 kΩ to 7 kΩ
Measured from +3 V to –3 V or –3 V to +3 V
t
PHLT
t
PLHT
t
PHLR
t
PLHR
t
ER
t
DR
SHDN
Goes High
SHDN
Goes Low
–2–
REV.
B
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