Datasheet

+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.) (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
All except MAX220/MAX243, V
CC
= +5V, no
hysteresis in shutdown
0.2 0.5 1.0
MAX220 0.3
RS-232 Input Hysteresis
MAX243 1
V
3 5 7
RS-232 Input Resistance T
A
= +25°C (MAX220)
3 5 7
k
I
OUT
= 3.2mA 0.2 0.4
TTL/CMOS Output Voltage Low
I
OUT
= 1.6mA (MAX220) 0.4
V
TTL/CMOS Output Voltage High I
OUT
= -1.0mA 3.5 V
CC
- 0.2 V
Sourcing V
OUT
= V
GND
-2 -10
TTL/CMOS Output Short-Circuit Current
Sinking V
OUT
= V
CC
10 30
mA
TTL/CMOS Output Leakage Current
V
SHDN
= V
CC
or V
EN
= V
CC
(V
SHDN
= 0V for
MAX222), 0V  V
OUT
 V
CC
±0.05 ±10 μA
EN Input Threshold Low MAX242 1.4 0.8 V
EN Input Threshold High MAX242 2.0 1.4 V
Supply Voltage Range 4.5 5.5 V
MAX220 0.5 2
No load
MAX222/MAX232A/MAX233A/
MAX242/MAX243
4 10
MAX220 12
V
CC
Supply Current (V
SHDN
= V
CC
),
Figures 5, 6, 11, 19
3k load
both inputs
MAX222/MAX232A/MAX233A/
MAX242/MAX243
15
mA
T
A
= +25°C 0.1 10
T
A
= 0°C to +70°C 2 50
T
A
= -40°C to +85°C 2 50
Shutdown Supply Current
MAX222/
MAX242
T
A
= -55°C to +125°C 35 100
μA
SHDN Input Leakage Current MAX222/MAX242 ±1 μA
SHDN Threshold Low MAX222/MAX242 1.4 0.8 V
SHDN Threshold High MAX222/MAX242 2.0 1.4 V
MAX222/MAX232A/
MAX233/MAX242/MAX243
6 12 30
Transition Slew Rate
C
L
= 50pF to 2500pF,
R
L
= 3k to 7k,
V
CC
= +5V, T
A
=
+25°C, measured
from +3V to -3V or
-3V to +3V
MAX220 1.5 3 30.0
V/μs
MAX222/MAX232A/
MAX233/MAX242/MAX243
1.3 3.5
t
PHLT
, Figure 1
MAX220 4 10
MAX222/MAX232A/
MAX233/MAX242/MAX243
1.5 3.5
Transmitter Propagation Delay TLL to
RS-232 (Normal Operation)
t
PLHT
, Figure 1
MAX220 5 10
μs
Maxim Integrated
3
MAX220–MAX249
MAX220–MAX249