X9279UV14IZ-2.7

Digital Potentiometers Overview

The X9279UV14IZ-2.7 is a single-channel nonvolatile digital potentiometer from the Renesas XDCP series, housed in a 14-TSSOP surface-mount package. It features a 50 kΩ end-to-end resistance with 256 linear taps and an I²C serial interface. The device operates on a fixed 5V supply and includes optional address selection for multi-device systems. Key electrical parameters include a typical wiper resistance of 100 Ω, a temperature coefficient of ±300 ppm/°C, and a tolerance of ±20%. It supports data retention for 100 years and endurance of 100,000 write cycles per register.

Digital Potentiometers Feature Summary

• Single-channel digital potentiometer with 256 taps and 50 kΩ resistance
• Nonvolatile memory retains wiper position after power loss
• I²C serial interface with optional hardware address selection
• Fixed 5V operating voltage with -40°C to +85°C industrial temperature range

Digital Potentiometers Applications

• Programmable gain control in instrumentation amplifiers
• Volume adjustment in audio signal processing circuits
• Offset voltage trimming in operational amplifier stages
• Reference voltage setting for comparators and detectors

Digital Potentiometers Procurement Notes

This component is officially listed as obsolete by the manufacturer, with End-of-Life (EOL) notices dating back to November 2011. Verification of current availability requires checking authorized distributors for remaining stock or qualified replacement components. Ensure that any sourced units match the specific 'IZ' suffix requirements for RoHS compliance and lead-free status if mandated by project specifications.

Digital Potentiometers Selection Notes

Select this part when a single-channel, nonvolatile digital potentiometer with high resolution (256 taps) is required under a fixed 5V supply. The I²C interface minimizes pin count compared to SPI alternatives. Verify that the 50 kΩ resistance value aligns with the target circuit's impedance requirements and that the ±20% tolerance meets the precision needs of the application.

Digital Potentiometers Part Context

The X9279 belongs to the X92xx family of single-channel digital potentiometers, distinct from the dual-channel X924x series or the quad-channel X925x series. It shares architectural similarities with the X9429 but differs in tap count (256 vs. 64) and resistance value (50 kΩ vs. 10 kΩ). The 'U' indicates the TSSOP package, while 'IZ' denotes the RoHS-compliant, lead-free variant.

Digital Potentiometers Replacement Considerations

Public documentation lists the AD5280BRUZ50 (Analog Devices Inc.) as a similar replacement option. Designers should verify pin compatibility and electrical parameter alignment before substitution.