LT1237 5V RS232 Transceiver with Advanced Power Management and One Receiver Active in Shutdown
The LT®1237 is an advanced low power three driver, five receiver RS232 transceiver. Included on the chip is a shutdown pin for reducing supply current near zero. During shutdown one receiver remains active to detect incoming RS232 signals, for example, to wake up a system. The LT1237 is fully compliant with all EIA RS232 specifications. New ESD structures on the chip allow the LT1237 to survive multiple ±15kV strikes, eliminating the need for costly TransZorbs® on the RS232 line pins. The LT1237 operates in excess of 120kbaud even driving heavy capacitive loads. Two shutdown modes allow the driver outputs to be shut down separately from the receivers for more versatile control of the RS232 interface. During shutdown, drivers and receivers assume a high impedance state
产品特点 Features
- One Receiver Remains Active While in Shutdown
- ESD Protection over ±15kV
- Uses Small Capacitors: 0.1µF, 0.2µF, 1.0µF
- 60µA Supply Current in Shutdown
- Pin-Compatible with LT1137A
- 120kBaud Operation for RL = 3k, CL = 2500pF
- 250kBaud Operation for RL = 3k, CL = 1000pF
- Operates to 120kBaud
- CMOS Comparable Low Power 30mW
- Operates from a Single 5V Supply
- Easy PC Layout � Flowthrough Architecture
- Rugged Bipolar Design
- Outputs Assume a High Impedance State When Off
or Powered Down
- Absolutely No Latchup
- Available in SO and SSOP Packages
|
应用
- Notebook Computers
- Palmtop Computers
典型应用图
参数
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LT1237 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) * |
| LT1237CG |
SSOP |
28 |
C |
$5.42 |
$4.20 |
| LT1237CG#PBF |
SSOP |
28 |
C |
$5.42 |
$4.20 |
| LT1237CG#TR |
SSOP |
28 |
C |
|
$4.30 |
| LT1237CG#TRPBF |
SSOP |
28 |
C |
|
$4.30 |
| LT1237CNW |
PDIP |
28 |
C |
$4.92 |
$3.90 |
| LT1237CNW#PBF |
PDIP |
28 |
C |
$4.92 |
$3.90 |
| LT1237CSW |
SO |
28 |
C |
$4.92 |
$3.90 |
| LT1237CSW#PBF |
SO |
28 |
C |
$4.92 |
$3.90 |
| LT1237CSW#TR |
SO |
28 |
C |
|
$4.00 |
| LT1237CSW#TRPBF |
SO |
28 |
C |
|
$4.00 |
LT1237 数据手册及相关资料下载
- 数据手册 (英文) : LT1237 - 5V RS232 Transceiver with Advanced Power Management and 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) : 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
