+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
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.)
PARAMETER
CONDITIONS
All except MAX220/MAX243, V
CC
= 5V, no
hysteresis in SHDN
RS-232 Input Hysteresis
MAX220
MAX243
RS-232 Input Resistance
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Short-Circuit Current
TTL/CMOS Output Leakage Current
EN Input Threshold Low
EN Input Threshold High
Operating Supply Voltage
MAX220
No load
V
CC
Supply Current (SHDN = V
CC
),
figures 5, 6, 11, 19
MAX222/MAX232A/MAX233A/
MAX242/MAX243
MAX220
3kΩ load both
MAX222/MAX232A/MAX233A/
inputs
MAX242/MAX243
T
A
= +25°C
Shutdown Supply Current
MAX222/
MAX242
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= -55°C to +125°C
SHDN
Input Leakage Current
SHDN
Threshold Low
SHDN
Threshold High
MAX222/MAX242
MAX222/MAX242
MAX222/MAX242
C
L
= 50pF to
MAX222/MAX232A/MAX233/
2500pF, R
L
= 3kΩ MAX242/MAX243
to 7kΩ, V
CC
= 5V,
T
A
= +25°C,
MAX220
measured from
+3V to -3V or -3V
t
PHLT
Transmitter Propagation Delay TLL to
RS-232 (Normal Operation), Figure 1
t
PLHT
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
2.0
6
1.4
1.4
12
30
V/µs
1.5
3
30.0
T
A
= +25°C (MAX220)
I
OUT
= 3.2mA
I
OUT
= 1.6mA (MAX220)
I
OUT
= -1.0mA
Sourcing V
OUT
= GND
Shrinking V
OUT
= V
CC
SHDN
= V
CC
or
EN
= V
CC
(SHDN = 0V for
MAX222), 0V
≤
V
OUT
≤
V
CC
MAX242
MAX242
3.5
-2
10
V
CC
- 0.2
-10
30
±0.05
1.4
2.0
4.5
0.5
4
12
15
0.1
2
2
35
10
50
50
100
±1
0.8
µA
V
V
µA
1.4
5.5
2
10
µA
±10
0.8
3
3
MIN
0.2
TYP
0.5
0.3
1
5
5
0.2
7
7
0.4
0.4
KΩ
V
V
mA
µA
V
V
V
MAX
1.0
V
UNITS
Transition Slew Rate
1.3
4
1.5
5
3.5
10
3.5
10
µs
Note 4:
MAX243 R2
OUT
is guaranteed to be low when R2
IN
is
≥
0V or is floating.
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
