DocumentationDatasheet
Reliability Data
Product Selector Card
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Features
- Low Supply Current: 300µA
- Two Receivers Kept Alive in Shutdown
- ESD Protection Over ±10kV
- Operates from a Single 5V Supply
- Uses Small Capacitors: 0.1µF
- Operates to 120k Baud
- 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
- Pin Compatible with LT1137A and LT1237
- Flowthrough Architecture
Typical Application
Description
The LTC™1349 is a 3-driver/ 5-receiver RS232 transceiver with very low supply current. In the no load condition, the supply current is only 300µA. The charge pump only requires four 0.1µF capacitors.
In Shutdown mode, two receivers are kept alive and the supply current is 35µA. All RS232 outputs assume a high impedance state in Shutdown and with the power off.
The LTC1349 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver can operate up to 120k baud with a 2500pF, 3k ohms load. Both driver outputs and receiver inputs can be forced to �25V without damage, and can survive multiple ±10kV ESD strikes.
NW-28,SSOP-28,SW-28
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1349CG#PBF | SSOP | 28 | C | $6.35 | $4.95 |
| LTC1349CG#TRPBF | SSOP | 28 | C | $5.05 | |
| LTC1349CNW#PBF | PDIP | 28 | C | $5.85 | $4.60 |
| LTC1349CSW#PBF | SO | 28 | C | $5.85 | $4.60 |
| LTC1349CSW#TRPBF | SO | 28 | C | $4.70 | |
| LTC1349IG#PBF | SSOP | 28 | I | $6.90 | $5.45 |
| LTC1349IG#TRPBF | SSOP | 28 | I | $5.55 | |
| LTC1349INW#PBF | PDIP | 28 | I | $6.40 | $5.05 |
| LTC1349ISW#PBF | SO | 28 | I | $6.40 | $5.05 |
| LTC1349ISW#TRPBF | SO | 28 | I | $5.15 | |
| LTC1349CG | SSOP | 28 | C | $12.70 | $9.90 |
| LTC1349CG#TR | SSOP | 28 | C | $10.10 | |
| LTC1349CNW | PDIP | 28 | C | $11.70 | $9.20 |
| LTC1349CSW | SO | 28 | C | $11.70 | $9.20 |
| LTC1349CSW#TR | SO | 28 | C | $9.40 | |
| LTC1349IG | SSOP | 28 | I | $13.80 | $10.90 |
| LTC1349IG#TR | SSOP | 28 | I | $11.10 | |
| LTC1349INW | PDIP | 28 | I | $12.80 | $10.10 |
| LTC1349ISW | SO | 28 | I | $12.80 | $10.10 |
| LTC1349ISW#TR | SO | 28 | I | $10.30 |
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.