ADM232A_15 Datasheet, PDF (2/11 Pages) Analog Devices – CMOS RS-232 Drivers/Receivers

ADM222/ADM232A/ADM242–SPECIFICATIONS (VCC = 5 V ؎ 10%. C1–C4 = 0.1 ␮F; all spec-
ifications T_MIN to T_MAX unless otherwise noted.)
Parameter
Min Typ Max Unit Test Conditions/Comments
RS-232 TRANSMITTERS
Output Voltage Swing
±5
Input Logic Threshold Low, V_INL
Input Logic Threshold High, V_INH
2.4
Logic Pull-Up Current
Data Rate
200
Output Resistance
300
Output Short Circuit Current (Instantaneous)
±9
1.7 0.8
1.7
12 40
± 10
V
All Transmitter Outputs Loaded with
3 kΩ to Ground
V
T_IN
V
T_IN
µA
T_IN = 0 V
kB/s
Ω
V_CC = V+ = V– = 0 V, V_OUT = ± 2 V
mA
RS-232 RECEIVERS
RS-232 Input Voltage Range
–30
+30 V
RS-232 Input Threshold Low
0.8
1.2
V
RS-232 Input Threshold High
1.6 2.4 V
RS-232 Input Hysteresis
0.2
RS-232 Input Resistance
3
TTL/CMOS Output Voltage Low, V_OL
TTL/CMOS Output Voltage High, V_OH
3.5
TTL/CMOS Output Short-Circuit Current –2
TTL/CMOS Output Short-Circuit Current 10
TTL/CMOS Output Leakage Current
EN Input Threshold Low, V_INL
EN Input Threshold High, V_INH
2.0
0.4 1.0 V
V_CC = 5 V
5
7
kΩ
T_A = 0°C to 85°C
0.05 0.4 V
I_OUT = 3.2 mA
V
I_OUT = –1.0 mA
–85
mA Source Current (V_OUT = GND)*
35
mA
Sink Current (V_OUT = V_CC)*
± 0.05 ± 10 µA
SHDN = GND/EN = V_CC
0 V ≤ V_OUT ≤ V_CC
1.4 0.8 V
1.4
V
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
4
8
mA No Load
13
mA 3 kΩ Load on Both Outputs
0.1 10
µA
±1
µA
1.4 0.8 V
2.0
1.4
V
AC CHARACTERISTICS
Transition Region Slew Rate
3
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
8
30
0.85 3.5
1.0 3.5
0.1 0.5
0.3 0.5
125 500
160 500
250
3.5
150
200
V/µs 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
µs
t_PHLT
µs
t_PLHT
µs
t_PHLR
µs
t_PLHR
ns
t_ER
ns
t_DR
µs
SHDN Goes High
µs
SHDN Goes Low
ns
ns
*Guaranteed by design, not production tested.
Specifications subject to change without notice.
–2–
REV. B