Specifications

MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________ 3
Note 3: MAX243 R2
OUT
is guaranteed to be low when R2
IN
is ≥ 0V or is floating.
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.)
Operating Supply Voltage
SHDN Threshold High
4.5 5.5 V
MAX222/242
Transmitter-Output Enable Time
(SHDN goes high), Figure 4
2.0 1.4 V
MAX220 0.5 2
t
ET
No load
MAX222/232A/233A/242/243 410
MAX222/232A/233A/242/243 61230
MAX220 12
V
CC
Supply Current (SHDN = V
CC
),
Figures 5, 6, 11, 19
3kΩ load
both inputs
MAX222/232A/233A/242/243 15
mA
Transition Slew Rate
T
A
= +25°C 0.1 10
C
L
= 50pF to 2500pF,
R
L
= 3kΩ to 7kΩ,
V
CC
= 5V, T
A
= +25°C,
measured from +3V
to -3V or -3V to +3V
T
A
= 0°C to +70°C
CONDITIONS
250
MAX220 1.5 3 30
V/µs
T
A
= -40°C to +85°C 250
MAX222/242, 0.1µF caps
(includes charge-pump start-up)
Shutdown Supply Current MAX222/242
T
A
= -55°C to +125°C 35 100
µA
SHDN Input Leakage Current
MAX222/242 ±1 µA
SHDN Threshold Low
MAX222/242 1.4 0.8 V
250
MAX222/232A/233A/242/243 1.3 3.5
µs
t
PHLT
MAX220 410
Transmitter-Output Disable Time
(SHDN goes low), Figure 4
t
DT
MAX222/232A/233A/242/243 1.5 3.5
Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1
t
PLHT
MAX220 510
µs
V2.0 1.4
MAX222/242, 0.1µF caps
µA±0.05 ±10
600
TTL/CMOS Output Leakage Current
EN Input Threshold High
MAX222/232A/233A/242/243 0.5 1
ns
t
PHLR
MAX220 0.6 3
t
PLHR
MAX222/232A/233A/242/243 0.6 1
Receiver Propagation Delay
RS-232 to TLL (normal operation),
Figure 2
t
PHLT
- t
PLHT
MAX220 0.8 3
µs
MAX222/232A/233A/242/243
t
PHLS
MAX242 0.5 10
Receiver Propagation Delay
RS-232 to TLL (shutdown), Figure 2
t
PLHS
MAX242 2.5 10
µs
Receiver-Output Enable Time, Figure 3 t
ER
MAX242
UNITSMIN TYP MAX
125 500
PARAMETER
MAX242
ns
SHDN = V
CC
or EN = V
CC
(SHDN = 0V for MAX222),
0V ≤ V
OUT
≤ V
CC
Receiver-Output Disable Time, Figure 3 t
DR
MAX242 160 500 ns
300
ns
Transmitter + to - Propagation
Delay Difference (normal operation)
MAX220 2000
t
PHLR
- t
PLHR
MAX222/232A/233A/242/243 100
ns
Receiver + to - Propagation
Delay Difference (normal operation)
MAX220 225
V1.4 0.8
EN Input Threshold Low
MAX242