X9221AUP

Digital Potentiometers Overview

The X9221AUP is a dual-channel digital potentiometer IC from the X9221A series, manufactured by Renesas Electronics Corporation. It features two independent potentiometers, each with 64 tap positions and a resistance value of 50 kOhms. The device utilizes a non-volatile EEPROM memory to retain wiper settings upon power loss. Communication is handled via a serial interface, operating within a supply voltage range of 4.5 V to 5.5 V. It is housed in a 20-pin PDIP package and supports a linear taper configuration. The component is rated for an operating temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Dual channel configuration with 64 taps per potentiometer
• Non-volatile EEPROM storage for wiper position retention
• Serial (2-Wire) interface for control and data transfer
• Linear taper resistance characteristic

Digital Potentiometers Applications

• Audio volume control circuits
• Programmable gain amplifier adjustments
• Voltage reference trimming

Digital Potentiometers Procurement Notes

The X9221AUP is listed as obsolete or not recommended for new designs by major distributors. Verification of current availability requires checking authorized Renesas channels or secondary market suppliers. RoHS compliance status should be confirmed against specific manufacturing dates due to the product's age. Lead times may vary significantly if sourced from surplus inventory.

Digital Potentiometers Selection Notes

Select this component when a dual-channel, non-volatile digital potentiometer with 50 kOhm resistance is required. Ensure the system operates at 5V logic levels compatible with the 2-wire serial interface. Verify that the 64-step resolution meets the application's precision requirements. Consider the PDIP-20 package constraints for PCB layout compared to surface-mount alternatives like the USIZ variant.

Digital Potentiometers Part Context

The X9221AUP belongs to the X9221A family of digital potentiometers, which also includes variants such as the X9221AUSIZ (SOIC-20 package). These devices are designed to replace mechanical potentiometers in applications requiring programmable resistance without physical adjustment. The UP suffix denotes the 20-pin Plastic Dual In-Line Package (PDIP), distinguishing it from surface-mount options.

Digital Potentiometers Replacement Considerations

Direct pin-to-pin replacements include other X9221A series parts with different packages, such as X9221AUSIZ. Cross-referencing with Intersil branded equivalents may be necessary as Renesas acquired Intersil. Verify that substitute components maintain the same non-volatile memory type and serial interface protocol.