LT1237 - 5V RS232 Transceiver with Advanced Power Management and One Receiver Active in Shutdown
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
Typical Application
Description
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.Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT1237CG#PBF | SSOP-28 | G | C | 05-08-1640 (G28) | Yes |
| LT1237CG#TRPBF | SSOP-28 | G | C | 05-08-1640 (G28) | Yes |
| LT1237CNW#PBF | NW-28 | NW | C | 05-08-1520 | Yes |
| LT1237CSW#PBF | SW-28 | SW | C | 05-08-1620 (SW28) | Yes |
| LT1237CSW#TRPBF | SW-28 | SW | C | 05-08-1620 (SW28) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1237CG#PBF | SSOP-28 | C | $5.42 | $4.20 | Yes | |
| LT1237CG#TRPBF | SSOP-28 | C | $4.30 | Yes | ||
| LT1237CNW#PBF | NW-28 | C | $4.92 | $3.90 | Yes | |
| LT1237CSW#PBF | SW-28 | C | $4.92 | $3.90 | Yes | |
| LT1237CSW#TRPBF | SW-28 | C | $4.00 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- Notebook Computers
- Palmtop Computers
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
