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参数资料
| 型号： | MAX237 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | RS-232 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | 5V的高速RS - 232收发器与0.1uF电容 |
| 文件页数： | 8/36页 |
| 文件大小： | 442K |
| 代理商： | MAX237 |
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Input Logic Threshold Low
Input Logic Threshold High
M
+5V-Powered, Multichannel RS-232
Drivers/Receivers
8
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249
Supply Voltage (V
CC
)...............................................-0.3V to +6V
Input Voltages
T
IN
ENA
,
ENB
,
ENR
,
ENT
,
ENRA
,
ENRB
,
ENTA
,
ENTB
..................................-0.3V to (V
CC
+ 0.3V)
R
IN
.....................................................................................±25V
T
OUT
(Note 3).....................................................................±15V
R
OUT
........................................................-0.3V to (V
CC
+ 0.3V)
Short Circuit (one output at a time)
T
OUT
to GND............................................................Continuous
R
OUT
to GND............................................................Continuous
ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249
(MAX225, V
CC
= 5.0V ±5%; MAX244–MAX249, V
CC
= +5.0V ±10%, external capacitors C1–C4 = 1μF; T
A
= T
MIN
to T
MAX
; unless oth-
erwise noted.)
Note 4:
Input voltage measured with transmitter output in a high-impedance state, shutdown, or V
CC
= 0V.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W
40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...611mW
44-Pin PLCC (derate 13.33mW/°C above +70°C) ...........1.07W
Operating Temperature Ranges
MAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C
MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering,10sec)..............................+300°C
V
CC
= 0V,
V
OUT
= ±15V
μA
Tables 1a–1d
±0.01
±25
Normal operation
Shutdown
Tables 1a–1d, normal operation
All transmitter outputs loaded with 3k
to GND
ENA
,
ENB
,
ENT
,
ENTA
,
ENTB
=
V
CC,
V
OUT
= ±15V
V
RS-232 Input Hysteresis
RS-232 Input Resistance
RS-232 Input Threshold Low
RS-232 Input Threshold High
V
V
V
±5
±7.5
Output Voltage Swing
Output Leakage Current (shutdown)
±0.01
±25
mA
300
±7
10M
±30
V
CC
= V+ = V- = 0V, V
OUT
= ±2V (Note 4)
V
OUT
= 0V
Transmitter Output Resistance
Output Short-Circuit Current
RS-232 RECEIVERS
μA
PARAMETER
±0.05
±0.10
MIN
TYP
MAX
UNITS
Normal operation, outputs disabled,
Tables 1a–1d, 0V
≤
V
OUT
≤
V
CC
,
ENR
_ = V
CC
TTL/CMOS Output Leakage Current
10
30
Shrinking V
OUT
= V
CC
mA
-2
-10
Sourcing V
OUT
= GND
V
3.5
V
CC
- 0.2
I
OUT
= -1.0mA
TTL/CMOS Output Voltage High
V
0.2
0.4
I
OUT
= 3.2mA
TTL/CMOS Output Voltage Low
k
3
5
7
0.2
0.5
1.0
V
CC
= 5V
1.4
1.4
0.8
V
V
TTL/CMOS Output Short-Circuit Current
1.8
2.4
0.8
1.3
V
CC
= 5V
V
CC
= 5V
V
±25
RS-232 Input Voltage Operating Range
kbits/sec
120
64
Data Rate
CONDITIONS
μA
±0.01
±1
Logic Pull-Up/lnput Current
10
50
Tables 1a–1d
2
RS-232 TRANSMITTERS
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