LT1342 5V RS232 Transceiver with 3V Logic Interface

The LT®1342 is an advanced low power three-driver, five-receiver RS232 transceiver. The LT1342 operates from a 5V supply and a 3V logic supply. Receiver outputs can interface directly to 3V logic circuits. Included on the chip is a shutdown pin for reducing supply current to near zero. All receivers and drivers assume high impedance states during shutdown. The driver disable function provides additional control of operating mode. When driver disable is high the charge pump and drivers turn off. Receivers continue to operate during driver disable. New ESD structures on the chip allow the LT1342 to survive multiple ±10kV strikes, eliminating the need for costly TransZorbs® on the RS232 line pins. The LT1342 is fully compliant with all EIA RS232 specifications and operates in excess of 120kbaud even driving heavy capacitive loads

产品特点 Features

ESD Protection Over ±10kV
3V Logic Interface
Uses Small Capacitors: 0.1µF, 0.2µF
1µA Supply Current in Shutdown
Low Power Driver Disable Operating Mode
Pin Compatible with LT1137A
120kBaud Operation for RL = 3k, CL = 2500pF
250kBaud Operation for RL = 3k, CL = 1000pF
CMOS Comparable Low Power: 60mW
Easy PC Layout: Flowthrough Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off or Powered Down
Absolutely No Latch-Up

应用

Notebook Computers
Palmtop Computers

典型应用图

参数

LT1342 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT1342CG	SSOP	28	C	$5.42	$4.20
LT1342CG#PBF	SSOP	28	C	$5.42	$4.20
LT1342CG#TR	SSOP	28	C		$4.30
LT1342CG#TRPBF	SSOP	28	C		$4.30
LT1342CNW	PDIP	28	C	$4.92	$3.90
LT1342CNW#PBF	PDIP	28	C	$4.92	$3.90
LT1342CSW	SO	28	C	$4.92	$3.90
LT1342CSW#PBF	SO	28	C	$4.92	$3.90
LT1342CSW#TR	SO	28	C		$4.00
LT1342CSW#TRPBF	SO	28	C		$4.00

LT1342 数据手册及相关资料下载

数据手册 (英文) : LT1342 - 5V RS232 Transceiver with 3V Logic Interface.PDF
设计要点 (英文) : DN14 - Extending the Applications of 5V Powered RS232 Transceivers.PDF
设计要点 (英文) : DN27 - Design Considerations for RS-232 Interfaces.PDF
设计要点 (英文) : DN29 - A Single Supply RS232 Interface for Bipolar A to D Converters.PDF
设计要点 (英文) : DN64 - RS232 Transceivers for Hand Held Computers Withstand 10kV ESD.PDF
设计要点 (英文) : DN71 - Regulator Circuit Generates Both 3.3V and 5V Outputs from 3.3V or 5V to Run Computers and RS232.PDF
设计要点 (英文) : DN75 - RS232 Interface Circuits for 3.3V Systems.PDF
设计要点 (英文) : DN80 - ESD Testing for RS232 Interface Circuits.PDF
可靠性数据 : R068 Reliability Data .PDF
产品选型卡 : LTM2882 - Isolated RS232 + 1W Power.PDF
产品选型卡 : RS232 Quick Guide.PDF