+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)
(MAX223/230/232/234/236/237/238/240/24±, V
= +5V ±±0; MAX233/MAX235, V
= 5V ±5ꢀF C±–C4 = ±.0µꢁ; MAX23±/MAX239,
CC
CC
V
CC
= 5V ±±0ꢀ; V+ = 7.5V to ±3.2V; T = T
to T ; unless otherwise noted.)
A
MIN
MAX
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Normal operation
0.8
±.2
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/24±)
T
V
= +25°C,
A
RS-232 Input Threshold Low
RS-232 Input Threshold High
V
= 5V
CC
Shutdown (MAX223)
SHDN = 0V,
0.6
±.5
±.7
±.5
EN = 5V (R4 , R5
)
IN
IN
Normal operation
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/24±)
2.4
T
A
= +25°C,
V
V
= 5V
CC
Shutdown (MAX223)
SHDN = 0V,
2.4
EN = 5V (R4 F R5
)
IN
IN
RS-232 Input Hysteresis
V
= 5V, no hysteresis in shutdown
= 5V
0.2
3
0.5
5
±.0
7
V
kΩ
V
CC
RS-232 Input Resistance
T
A
= +25°C, V
CC
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
I
I
= ±.6mA (MAX23±/232/233, I = 3.2mA)
OUT
0.4
OUT
OUT
= -±mA
3.5
V
- 0.4
V
CC
0V ≤ R
EN = V
≤ V ; EN = 0V (MAX223);
CC
(MAX235–24± )
OUT
TTL/CMOS Output Leakage Current
Receiver Output Enable Time
0.05
±±0
µA
ns
CC
MAX223
600
400
900
250
0.5
4
Normal
operation
MAX235/236/239/240/24±
MAX223
Normal
operation
Receiver Output Disable Time
Propagation Delay
ns
µs
MAX235/236/239/240/24±
Normal operation
±0
40
40
RS-232 IN to
TTL/CMOS OUT,
C = ±50pꢁ
L
t
PHLS
PLHS
SHDN = 0V
(MAX223)
t
6
MAX223/MAX230/MAX234–24±, T = +25°C, V
= 5V,
A
CC
R = 3kΩ to 7kΩF C = 50pꢁ to 2500pꢁ, measured from
3
5.±
4
30
30
L
L
+3V to -3V or -3V to +3V
Transition Region Slew Rate
Transmitter Output Resistance
V/µs
MAX23±/MAX232/MAX233, T = +25°C, V
= 5V,
CC
A
R = 3kΩ to 7kΩ, C = 50pꢁ to 2500pꢁ, measured from
L
L
+3V to -3V or -3V to +3V
V
CC
= V+ = V- = 0V, V = ±2V
OUT
300
Ω
Transmitter Output Short-Circuit
Current
±±0
mA
mA
6
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