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LTC1384IN PDF预览

LTC1384IN

更新时间： 2024-11-02 05:43:39
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
8页 116K
描述
5V Low Power RS232 Transceiver with 2 Receivers Active in Shutdown

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中文翻译

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LTC1384IN 数据手册

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LTC1384  
5V Low Power RS232  
Transceiver with 2 Receivers  
Active in Shutdown  
U
FEATURES  
DESCRIPTIO  
TheLTC®1384isanultra-lowpower2-driver/2-receiver  
RS232 transceiver that operates from a single 5V  
supply. The charge pump requires only four space-  
saving 0.1µF capacitors.  
■
Operates from a Single 5V Supply  
Low Supply Current: ICC = 220µA  
ICC = 35µA in Shutdown Mode with Both  
Receivers Kept Alive  
ESD Protection Over ±10kV  
Uses Small Capacitors: 0.1µF  
Operates to 120kBaud  
Output Overvoltage Does Not Force Current  
Back into Supplies  
■
■
■
■
■
Thetransceiveroperatesinoneoftwomodes, Normaland  
Shutdown. In the Normal mode, ICC is only 220µA with the  
driver outputs unloaded. In the Shutdown mode, the  
charge pump is turned off, the driver outputs are forced  
into three-state, both receivers are kept active and ICC  
drops to 35µA. The receiver outputs may be forced into  
three-state at any time using the receiver enable (RX EN)  
pin.  
■
■
RS232 I/O Lines Can Be Forced to ±25V  
Without Damage  
Pin Compatible with LT1180A  
U
The LTC1384 is fully compliant with all data rate and  
overvoltage RS232 specifications. The transceiver can  
operate up to 120kbaud with a 2500pF, 3kΩ load. Both  
driver outputs and receiver inputs can be forced to  
±25V without damage and can survive multiple ±10kV  
ESD strikes.  
APPLICATIO S  
■
Notebook Computers  
Palmtop Computers  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
2-Drivers/2-Receivers with Shutdown  
and Receiver Enable  
Quiescent and Shutdown Supply Current  
vs Temperature  
1200  
1000  
800  
600  
400  
200  
0
60  
50  
40  
30  
20  
10  
0
2
4
5
6
17  
3
V
= 5V  
TEST CONDITION: V = 5V  
CC  
CC  
0.1µF  
0.1µF  
0.1µF  
LTC1384  
7
SHUTDOWN  
CURRENT  
0.1µF  
V
V
CC  
CC  
300k  
12  
15  
LOGIC INPUT  
232 OUTPUT  
300k  
QUIESCENT  
CURRENT  
11  
13  
8
LOGIC INPUT  
232 OUTPUT  
232 INPUT  
14  
LOGIC OUTPUT  
5k  
5k  
–20  
20  
40  
60  
80  
0
TEMPERATURE (°C)  
10  
18  
9
LOGIC OUTPUT  
ON/OFF  
232 INPUT  
LTC1384 • TA02  
16  
LTC1384 • TA01  
1
RX EN  
1384fa  
1
12345678

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