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參數(shù)資料
| 型號： | ADM237LJNZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS-232 5:3 5V LP 24-DIP |
| 標準包裝： | 15 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 4/3 |
| 規(guī)程： | RS232 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 24-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 24-PDIP |
| 包裝： | 管件 |
5 V-Powered
CMOS RS-232 Drivers/Receivers
ADM231L–ADM234L/ADM236L–ADM241L
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2005 Analog Devices, Inc. All rights reserved.
FEATURES
Single 5 V power supply
Meets all EIA-232-E and V.28 specifications
120 kbps data rate
On-board dc-to-dc converters
±9 V output swing with 5 V supply
Small 1 F capacitors
Low power shutdown ≤1 A
±30 V receiver input levels
Latch-up free
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
GENERAL DESCRIPTION
The ADM2xx family of line drivers/receivers is intended for all
EIA-232-E and V.28 communications interfaces, especially in
applications in which 12 V is not available. The ADM236L and
ADM241L feature a low power shutdown mode that reduces
power dissipation to less than 5 W, making them ideally suited
for battery-powered equipment. The ADM233L does not
require any external components and is particularly useful in
applications where printed circuit board space is critical.
All members of the ADM2xxL family, except the ADM231L and
ADM239L, include two internal charge pump voltage converters
that allow operation from a single 5 V supply. These parts convert
the 5 V input power to the ±10 V required for RS-232 output
ADM236L TYPICAL OPERATING CIRCUIT
T1IN
T1OUT
T2IN
T2OUT
RS-232
OUTPUTS
T3IN
T4IN
R1OUT
R1IN
R2OUT
R2IN
TTL/CMOS
OUTPUTS
R3IN
R3OUT
T3OUT
T4OUT
1
F
+6.3V
1
F
+16V
C1+
C1–
C2–
C2+
V–
1
F
+16V
+10V TO –10V
VOLTAGE
INVERTER
1
F
+6.3V
1
F
+6.3V
+5V INPUT
VCC
+5V TO +10V
VOLTAGE
DOUBLER
T1
T2
T3
T4
R1
R2
R3
V+
SD
ADM236L
GND
00070-
0-
015
TTL/CMOS
INPUTS1
RS-232
INPUTS2
1INTERNAL 400k
PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5k
PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
EN
Figure 1.
levels. The ADM231L and ADM239L are designed to operate
from 5 V and 12 V supplies. An internal +12 V to 12 V charge
pump voltage converter generates the 12 V supply.
The ADM2xxL is an enhanced upgrade to the AD2xx family. It
features lower power consumption, faster slew rate, and the
ability to operate with smaller (1 F) capacitors.
Table 1. Selection Table
Part
Number
Power Supply Voltage
No. of RS-232
Drivers
No. of RS-232
Receivers
External
Capacitors
Low Power
Shutdown (SD)
TTL
Three-State EN
No. of
Pins
ADM231L
5 V and 7.5 V to 13.2 V
2
No
14
ADM232L
5 V
2
4
No
16
ADM233L
5 V
2
None
No
20
ADM234L
5 V
4
0
4
No
16
ADM236L
5 V
4
3
4
Yes
24
ADM237L
5 V
5
3
4
No
24
ADM238L
5 V
4
No
24
ADM239L
5 V and 7.5 V to 13.2 V
3
5
2
No
Yes
24
ADM241L
5 V
4
5
4
Yes
28
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