LT1331 - 3V RS562 or 5V/3V RS232 Transceiver with One Receiver Active in Shutdown
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
Typical Application
Description
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.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 |
|---|---|---|---|---|---|
| LT1331CG#PBF | SSOP-28 | G | C | 05-08-1640 (G28) | Yes |
| LT1331CG#TRPBF | SSOP-28 | G | C | 05-08-1640 (G28) | Yes |
| LT1331CNW#PBF | NW-28 | NW | C | 05-08-1520 | Yes |
| LT1331CSW#PBF | SW-28 | SW | C | 05-08-1620 (SW28) | Yes |
| LT1331CSW#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 | |
|---|---|---|---|---|---|---|
| LT1331CG#PBF | SSOP-28 | C | $5.42 | $4.20 | Yes | |
| LT1331CG#TRPBF | SSOP-28 | C | $4.30 | Yes | ||
| LT1331CNW#PBF | NW-28 | C | $4.92 | $3.90 | Yes | |
| LT1331CSW#PBF | SW-28 | C | $4.92 | $3.90 | Yes | |
| LT1331CSW#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
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- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
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- 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.
