DS275E

Overview

The DS275E is a line-powered RS-232 transceiver chip designed for low-power serial communication in battery-backed systems. It operates with a logic supply (VCC) of 4.5V to 5.5V and a transmit driver supply (VDRV) ranging from 4.5V to 13.0V. The device features one receiver and one transmitter, utilizing an 8-pin DIP, 8-pin SOIC, or 14-pin TSSOP package. Static current consumption is minimized by stealing power from the receive signal line during negative states. Operating temperatures range from 0°C to +70°C.

Feature Summary

• Steals power from the receive signal line to minimize static current drain when connected to an RS-232 port
• Translates RS-232 signal levels to common CMOS/TTL logic levels at the receiver output
• Variable transmitter level capability from +5 to +12 volts via the VDRV pin
• Compatible with RS-232-E signals and supports half-duplex operation

Applications

• Battery-operated handheld products
• Laptop computers
• Remote sensors
• Portable medical instruments

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. The DS275E designation corresponds to the 14-pin TSSOP package variant. Confirm RoHS compliance status and lead times through authorized distributors, as availability may vary based on production lifecycle stages.

Selection Notes

Select this component for applications requiring ultra-low static current in battery-powered environments where the RS-232 port remains connected. Ensure VDRV is maintained greater than or equal to VCC. Consider the 14-pin TSSOP footprint constraints and verify that the receiving end can interpret voltage swings between 0 and +5V if full-duplex operation is required without external charge storage.

Part Context

The DS275 series includes variants such as the DS275 (8-pin DIP), DS275S (8-pin SOIC), and DS275E (14-pin TSSOP). All share identical electrical characteristics and functionality, differing only in physical packaging. This family provides a cost-effective interface solution for serial ports while addressing power consumption issues inherent in traditional RS-232 drivers.

Replacement Considerations

Direct substitutes include other DS275 variants like the DS275S or DS275 depending on board space requirements. Verify pinout compatibility for the chosen package. No alternative part numbers are explicitly confirmed as direct replacements in the provided datasheet.