+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(V
= +5V ±±0ꢀ, C±–C4 = 0.±µꢁF MAX220, C± = 0.047µꢁ, C2–C4 = 0.33µꢁ, T = T
to T
F unless otherwise noted.)
MAX
CC
A
MIN
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
All except MAX220/MAX243, V
hysteresis in SHDN
= 5V, no
CC
0.2
0.5
±.0
RS-232 Input Hysteresis
RS-232 Input Resistance
V
MAX220
MAX243
0.3
±
3
3
5
7
T
= +25°C (MAX220)
KΩ
A
5
7
I
I
I
= 3.2mA
0.2
0.4
0.4
OUT
OUT
OUT
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Short-Circuit Current
V
V
= ±.6mA (MAX220)
= -±.0mA
3.5
-2
V
- 0.2
CC
Sourcing V
= GND
-±0
OUT
mA
Shrinking V
= V
±0
30
OUT
CC
SHDN = V
MAX222), 0V ≤ V
MAX242
or EN = V
(SHDN = 0V for
CC
CC
TTL/CMOS Output Leakage Current
±0.05
±±0
0.8
µA
≤ V
CC
OUT
EN Input Threshold Low
EN Input Threshold High
Operating Supply Voltage
±.4
±.4
V
V
V
MAX242
2.0
4.5
5.5
2
MAX220
0.5
4
No load
MAX222/MAX232A/MAX233A/
MAX242/MAX243
±0
V
Supply Current (SHDN = V ),
CC
CC
µA
µA
figures 5, 6, ±±, ±9
MAX220
±2
±5
3kΩ load both
inputs
MAX222/MAX232A/MAX233A/
MAX242/MAX243
T
A
T
A
T
A
T
A
= +25°C
0.±
2
±0
50
= 0°C to +70°C
= -40°C to +85°C
= -55°C to +±25°C
MAX222/
MAX242
Shutdown Supply Current
2
50
35
±00
±±
0.8
SHDN Input Leakage Current
SHDN Threshold Low
MAX222/MAX242
MAX222/MAX242
MAX222/MAX242
µA
V
±.4
±.4
SHDN Threshold High
2.0
6
V
C = 50pꢁ to
L
MAX222/MAX232A/MAX233/
MAX242/MAX243
±2
30
2500pꢁ, R = 3kΩ
L
to 7kΩ, V
= 5V,
CC
Transition Slew Rate
V/µs
T
A
= +25°C,
MAX220
±.5
3
30.0
measured from
+3V to -3V or -3V
MAX222/MAX232A/MAX233/
MAX242/MAX243
±.3
4
3.5
±0
t
PHLT
PLHT
MAX220
Transmitter Propagation Delay TLL to
RS-232 (Normal Operation), ꢁigure ±
µs
MAX222/MAX232A/MAX233/
MAX242/MAX243
±.5
5
3.5
±0
t
MAX220
Note 4: MAX243 R2
is guaranteed to be low when R2 is ≥ 0V or is floating.
IN
OUT
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3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
