Overview
Features and Benefits
- Low Supply Current: 600µA at 3.3V
- Supply Current in Shutdown: 0.2µA
- Supply Current in Receiver Alive Mode: 15µA
- ESD Protection over ±10kV
- Operates from a Single 3V to 5.5V Supply
- Operates to 120kBaud with 0.1µF Flying Capacitors
- Three-State Outputs Are High Impedance When Off
- Output Overvoltage Does Not Force Current Back into Supplies
- RS232 I/O Lines Can Be Forced to ±25V Without Damage
- Flowthrough Architecture
Product Details
The LTC1348 is a 3-driver/5-receiver RS232 transceiver with very low supply current. The charge pump only requires five 0.1 µF capacitors. The LTC1348 provides full RS232 output levels when operated over a wide supply range of 3V to 5.5V
The transceiver operates in one of four modes: Normal, Receiver Disable, Receiver Alive and Shutdown. In Normal or Receiver Disable mode, ICC is only 600µA at 3.3V and 800µA at 5V in the no load condition. In Shutdown mode, the supply current is further reduced to 0.2µA. In Receiver Alive mode, all five receivers are kept alive and the supply current is 15µA. All RS232 outputs assume a high impedance state in Shutdown or Receiver Alive mode or with the power off. The receiver outputs assume a high impedance state in Receiver Disable or with the power off.
The LTC1348 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver operates up to 120kBaud with all drivers loaded with 1000pF, 3kΩ Both driver outputs and receiver inputs can be forced to ±25V without damage and can survive multiple ±10kV ESD strikes.
Applications
- Notebook Computers
- Palmtop Computers
- Printers
- Portable Instruments
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
-
R277 Reliability Data3/23/2018
-
LTM2882 - Isolated RS232 + 1W Power4/24/2012
-
RS232 Quick Guide10/8/2010
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC1348CG#PBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| LTC1348CG#TRPBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| LTC1348CSW#PBF | Material Declaration | Reliability Data | 28-Lead SOIC (Wide 0.3 Inch) | |
| LTC1348CSW#TRPBF | Material Declaration | Reliability Data | 28-Lead SOIC (Wide 0.3 Inch) | |
| LTC1348IG#PBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| LTC1348IG#TRPBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| LTC1348ISW#PBF | Material Declaration | Reliability Data | 28-Lead SOIC (Wide 0.3 Inch) | |
| LTC1348ISW#TRPBF | Material Declaration | Reliability Data | 28-Lead SOIC (Wide 0.3 Inch) | |
| Wafer Fabrication Data | R277 Reliability Data |
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