LT1331 3V RS562 or 5V/3V RS232 Transceiver with One Receiver Active in Shutdown

The LT®1331 is a 3-driver, 5-receiver RS232 transceiver designed for 3V and mixed 3V/5V systems. Receivers operate from 3V logic supply VL, while the onboard charge pump and drivers operate from 5V or 3V supply VCC. The transceiver has two shutdown modes. One mode disables the drivers and the charge pump, the other shuts down all circuitry except for one low power receiver which can be used for ring detection. The VCC supply may be shut down while in ring detection mode. While shut down, the drivers and receivers assume high impedance output states. The LT1331 is fully compliant with all EIA-RS232 specifications when VCC = 5V. If VCC = 3V, output drive levels are compatible with all known interface circuits. Special bipolar construction techniques protect the drivers and receivers beyond the fault conditions stipulated for RS232. The RS232 I/O pins are resilient to multiple ±10kV ESD strikes. An advanced driver output stage operates up to 120kbaud while driving heavy capacitive loads

产品特点 Features

RS232 Compatible 3V Operation
3V Logic Interface
ESD Protection Over ±10kV
120kbaud Operation for RL = 3k, CL = 2500pF
250kbaud Operation for RL = 3k, CL = 1000pF
One Low Power Receiver Remains Active While in Shutdown
60µA Supply Current in Shutdown
Low Power Driver Disable Mode
Uses Small Capacitors: 0.1µF, 0.2µF
CMOS Comparable Low Power: 60mW
Easy PC Layout: Flowthrough Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off or Powered Down

应用

Notebook Computers
Palmtop Computers

典型应用图

参数

LT1331 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) *
LT1331CG	SSOP	28	C	$5.42	$4.20
LT1331CG#PBF	SSOP	28	C	$5.42	$4.20
LT1331CG#TR	SSOP	28	C		$4.30
LT1331CG#TRPBF	SSOP	28	C		$4.30
LT1331CNW	PDIP	28	C	$4.92	$3.90
LT1331CNW#PBF	PDIP	28	C	$4.92	$3.90
LT1331CSW	SO	28	C	$4.92	$3.90
LT1331CSW#PBF	SO	28	C	$4.92	$3.90
LT1331CSW#TR	SO	28	C		$4.00
LT1331CSW#TRPBF	SO	28	C		$4.00

LT1331 数据手册及相关资料下载

数据手册 (英文) : LT1331 - 3V RS562 or 5V/3V RS232 Transceiver with One Receiver Active in Shutdown.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