+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)
(MAX223/230/232/234/236/237/238/240/241, V
CC
= +5V ±10; MAX233/MAX235, V
CC
= 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,
V
CC
= 5V ±10%; V+ = 7.5V to 13.2V; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
PARAMETER
CONDITIONS
Normal operation
SHDN
= 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
Shutdown (MAX223)
SHDN
= 0V,
EN = 5V (R4
IN
, R5
IN
)
Normal operation
SHDN
= 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
Shutdown (MAX223)
SHDN
= 0V,
EN = 5V (R4
IN
‚ R5
IN
)
0.2
3
MIN
0.8
TYP
1.2
V
0.6
1.5
MAX
UNITS
RS-232 Input Threshold Low
T
A
= +25°C,
V
CC
= 5V
1.7
2.4
V
RS-232 Input Threshold High
T
A
= +25°C,
V
CC
= 5V
1.5
0.5
5
2.4
1.0
7
0.4
V
kΩ
V
V
±10
µA
ns
RS-232 Input Hysteresis
RS-232 Input Resistance
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Leakage Current
Receiver Output Enable Time
V
CC
= 5V, no hysteresis in shutdown
T
A
= +25°C, V
CC
= 5V
I
OUT
= 1.6mA (MAX231/232/233, I
OUT
= 3.2mA)
I
OUT
= -1mA
0V
≤
R
OUT
≤
V
CC
; EN = 0V (MAX223);
EN
= V
CC
(MAX235–241 )
Normal
operation
Normal
operation
MAX223
MAX235/236/239/240/241
MAX223
MAX235/236/239/240/241
3.5
V
CC
- 0.4
0.05
600
400
900
250
0.5
10
40
40
30
Receiver Output Disable Time
ns
Propagation Delay
Normal operation
RS-232 IN to
TTL/CMOS OUT,
SHDN
= 0V
C
L
= 150pF
(MAX223)
t
PHLS
t
PLHS
3
4
6
5.1
µs
Transition Region Slew Rate
MAX223/MAX230/MAX234–241, T
A
= +25°C, V
CC
= 5V,
R
L
= 3kΩ to 7kΩ‚ C
L
= 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
MAX231/MAX232/MAX233, T
A
= +25°C, V
CC
= 5V,
R
L
= 3kΩ to 7kΩ, C
L
= 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
V/µs
4
300
±10
30
Ω
mA
mA
Transmitter Output Resistance
Transmitter Output Short-Circuit
Current
6
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
