Datasheet

mA
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
6 _______________________________________________________________________________________
V
0.8 1.2
PARAMETER MIN TYP MAX UNITSCONDITIONS
Normal operation
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
1.7 2.4
RS-232 Input Threshold Low
T
A
= +25°C,
V
CC
= 5V
0.6 1.5
VRS-232 Input Threshold High
T
A
= +25°C,
V
CC
= 5V
Shutdown (MAX223)
SHDN = 0V,
EN = 5V (R4
IN
‚ R5
IN
)
1.5 2.4
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.)
Shutdown (MAX223)
SHDN = 0V,
EN = 5V (R4
IN
, R5
IN
)
Normal operation
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
RS-232 Input Hysteresis V
CC
= 5V, no hysteresis in shutdown 0.2 0.5 1.0 V
RS-232 Input Resistance T
A
= +25°C, V
CC
= 5V 357kΩ
TTL/CMOS Output Voltage Low I
OUT
= 1.6mA (MAX231/232/233, I
OUT
= 3.2mA) 0.4 V
TTL/CMOS Output Voltage High I
OUT
= -1mA 3.5 V
CC
- 0.4 V
TTL/CMOS Output Leakage Current
0V ≤ R
OUT
≤ V
CC
; EN = 0V (MAX223);
EN = V
CC
(MAX235–241 )
0.05 ±10 µA
MAX223 600
nsReceiver Output Enable Time
Normal
operation
MAX235/236/239/240/241 400
MAX223 900
nsReceiver Output Disable Time
Normal
operation
MAX235/236/239/240/241 250
Normal operation 0.5 10
µs
SHDN = 0V
(MAX223)
440Propagation Delay
RS-232 IN to
TTL/CMOS OUT,
C
L
= 150pF
640
3 5.1 30
V/µs
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
430
Transmitter Output Resistance V
CC
= V+ = V- = 0V, V
OUT
= ±2V 300 Ω
Transmitter Output Short-Circuit
Current
±10 mA
t
PHLS
t
PLHS
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