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LTC1387

更新时间： 2024-11-26 14:58:23
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
12页 198K
描述
单 5V RS232/RS485 多协议收发器

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中文翻译

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LTC1387 数据手册

 浏览型号LTC1387的Datasheet PDF文件第2页浏览型号LTC1387的Datasheet PDF文件第3页浏览型号LTC1387的Datasheet PDF文件第4页浏览型号LTC1387的Datasheet PDF文件第5页浏览型号LTC1387的Datasheet PDF文件第6页浏览型号LTC1387的Datasheet PDF文件第7页 
LTC1387  
Single 5V RS232/RS485  
Multiprotocol Transceiver  
U
DESCRIPTIO  
EATURE  
S
F
The LTC®1387 is a low power reconfigurable CMOS bidi-  
rectional transceiver. It can be configured as an RS485  
differential port or as two RS232 single-ended ports. An  
onboard charge pump uses four 0.1µF capacitors to  
generate boosted positive and negative supplies, allowing  
the RS232 drivers to meet ±5V output swing require-  
ments with only a single 5V supply. A shutdown mode  
reduces the ICC supply current to 5µA.  
■
■
■
Two RS232 Transceivers or One RS485 Transceiver  
Operates from a Single 5V Supply  
Guaranteed Receiver Output with Inputs  
Floating or Shorted to Ground  
Logic Selectable Fast/Slow RS485 Driver Slew Rate  
Low Supply Current: 7mA Typical  
5µA Supply Current in Shutdown  
■
■
■
■
■
■
Self-Testing Capability in Loopback Mode  
Separate Driver and Receiver Enable Controls  
Driver Maintains High Impedance in Three-State,  
Shutdown or with Power Off  
The RS232 transceivers are in full compliance with RS232  
specification. The RS485 transceiver is in full compliance  
with RS485 and RS422 specifications. The RS485 re-  
ceiver assumes a known output state when the inputs are  
floating or shorted to ground. All interface drivers feature  
short-circuit and thermal shutdown protection. An enable  
pin allows RS485 driver outputs to be forced into high  
impedancewhichismaintainedevenwhentheoutputsare  
forced beyond supply rails or the power is off. A loop back  
modeallowsthedriveroutputstobeconnectedbacktothe  
receiver inputs for diagnostic self-test.  
■
Receiver Inputs Can Withstand ±25V  
U
APPLICATIONS  
■
Point-of-Sale Terminals  
■
Software Selectable Multiprotocol Interface Ports  
■
Low Power RS485/RS422/RS232/EIA562 Interface  
■
Cable Repeaters  
Level Translators  
■
The LTC1387 is available in 20-pin plastic SSOP and SW  
packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
O
TYPICAL APPLICATI  
19  
20  
1
2
2
1
20  
19  
3
3
LTC1387  
LTC1387  
18  
V
CC2  
5V  
18  
V
CC1  
5V  
4
5
4
5
17  
15  
17  
RS485 INTERFACE  
RECOUT  
DR IN  
RECOUT  
120Ω  
120Ω  
6
7
6
7
15  
14  
DR IN  
SLEW  
4000-FT 24-GAUGE TWISTED PAIR  
14  
9
SLEW  
8
9
12  
11  
8
DR ENABLE  
5V  
5V  
DR ENABLE  
5V  
5V  
5V  
13  
12  
11  
13  
5V  
10  
10  
ALL CAPACITORS: 0.1µF MONOLITHIC CERAMIC TYPE  
LTC1387 • TA01  
1
1234567...12

中文翻译

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LTC1387IG Linear

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LTC1387IG#PBF Linear

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 		LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SSOP; Pins: 20; Temper
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 		LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SSOP; Pins: 20; Temper
LTC1387IG#TRPBF Linear

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 		LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SSOP; Pins: 20; Temper

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