Datasheet

(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.) (Note 5)
Note 5: All units are production tested at hot except for the MAX240, which is production tested at T
A
= +25°C. Specifications over
temperature are guaranteed by design.
PARAMETER CONDITIONS MIN TYP MAX UNITS
RS-232 Input Logic-Low Voltage
T
A
= +25°C,
V
CC
= +5V
Normal operation
V
SHDN
= +5V (MAX223)
V
SHDN
= 0V (MAX235/236/240/241)
0.8 1.2
V
Shutdown (MAX223)
V
SHDN
= 0V,
V
EN
= +5V (R4IN, R5IN)
0.6 1.5
RS-232 Input Logic-High Voltage
T
A
= +25°C,
V
CC
= +5V
Normal operation
V
SHDN
= 5V (MAX223)
V
SHDN
= 0V (MAX235/236/240/241)
1.7 2.4
V
Shutdown (MAX223)
V
SHDN
= 0V,
V
EN
= +5V (R4IN‚ R5IN)
1.5 2.4
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 3 5 7 kΩ
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
; V
EN
= 0V (MAX223);
V
EN
= V
CC
(MAX235–241)
±0.05 ±10 µA
Receiver Output Enable Time
Normal
operation
MAX223 600
ns
MAX235/236/239/240/241 400
Receiver Output Disable Tim
e
Normal
operation
MAX223 900
ns
MAX235/236/239/240/241 250
Propagation Delay
RS-232 IN to
TTL/CMOS OUT,
C
L
= 150pF
Normal operation 0.5 10
µs
V
SHDN
= 0V
(MAX223)
t
PHLS
4 40
t
PLHS
6 40
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
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
4 30
Transmitter Output Resistance V
CC
= V+ = V- = 0V, V
OUT
= ±2V 300 Ω
Transmitter Output Short-Circuit
Current
±10 mA
MAX220–MAX249 +5V-Powered, Multichannel
RS-232 Drivers/Receivers
www.maximintegrated.com
Maxim Integrated │ 6
Electrical Characteristics—MAX223/MAX230–MAX241 (continued)