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参数资料
型号： MAX244EQH
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： 通用总线功能
英文描述： 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors
中文描述： OCTAL LINE TRANSCEIVER, PQCC44
封装： PLASTIC, LCC-44
文件页数： 6/36页
文件大小： 442K
代理商： MAX244EQH
mA
M
+5V-Powered, Multichannel RS-232
Drivers/Receivers
6
_______________________________________________________________________________________
V
0.8
1.2
PARAMETER
MIN
TYP
MAX
UNITS
CONDITIONS
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
V
RS-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
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 )
MAX223
Normal
operation
MAX235/236/239/240/241
0.2
0.5
1.0
V
RS-232 Input Resistance
3
5
7
k
V
TTL/CMOS Output Voltage Low
0.4
TTL/CMOS Output Voltage High
3.5
V
CC
- 0.4
V
TTL/CMOS Output Leakage Current
0.05
±10
μA
600
ns
Receiver Output Enable Time
400
MAX223
900
ns
Receiver Output Disable Time
Normal
operation
MAX235/236/239/240/241
250
Normal operation
0.5
10
μs
SHDN
= 0V
(MAX223)
4
40
Propagation Delay
RS-232 IN to
TTL/CMOS OUT,
C
L
= 150pF
6
40
3
5.1
30
V/μs
MAX231/MAX232/MAX233, T
A
= +25°C, V
CC
= 5V,
R
L
= 3k
to 7k
, 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
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
= 3k
to 7k
C
L
= 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
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