CAT5419YI00

Digital Potentiometers Overview

The CAT5419YI00 is a dual digital potentiometer IC from onsemi, featuring two linear-taper resistive arrays with 64 taps each. It integrates control logic and 16 bytes of non-volatile memory (NVRAM) to store wiper settings. The device operates via a 2-wire serial interface (I²C-like) and supports supply voltages from 2.5 V to 6.0 V. Key electrical parameters include a typical standby current of less than 1 µA, end-to-end resistance options including 100 kΩ for the -00 suffix, and a maximum write cycle endurance of 1,000,000 cycles. It is housed in a 24-lead TSSOP package.

Digital Potentiometers Feature Summary

• Dual linear-taper digital potentiometers with 64 resistor taps per channel
• Integrated 16-byte NVRAM storing four non-volatile wiper settings per pot
• 2-wire serial bus interface (I²C-compatible) with hardware address selection
• Write protection pin (WP) safeguards data registers against inadvertent programming

Digital Potentiometers Applications

• Circuit level adjustments requiring non-volatile configuration retention
• System level calibration and trimming in industrial equipment
• Audio volume or tone control applications utilizing variable resistance modes

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix required for the desired resistance value and packaging format. The base model CAT5419YI00 corresponds to the 100 kΩ variant in the TSSOP-24 tube package. Confirm availability status as distribution channels may vary for legacy components. Ensure the design accounts for the 2-wire interface timing requirements specified in the datasheet.

Digital Potentiometers Selection Notes

Select this component when a dual-channel solution with persistent memory is required. The Y suffix indicates the TSSOP-24 package, while the 00 suffix specifies 100 kΩ resistance; use WI for SOIC or different numeric suffixes for other resistance values. Consider the 2.5 V to 6.0 V operating range and the need for hardware write protection via the WP pin during system design.

Digital Potentiometers Part Context

This part belongs to the CAT5419 family of dual digital potentiometers. Variants exist with different resistance values (2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ) and packages (SOIC-24, TSSOP-24). The I²C-like interface allows multiple devices to be addressed on a single bus using the A0-A3 pins, supporting up to sixteen unique addresses.

Digital Potentiometers Replacement Considerations

Direct replacements must match the dual-pot architecture, 64-tap resolution, and 2-wire serial interface. Verify that alternative components support the same voltage range (2.5–6.0 V) and offer comparable non-volatile memory endurance. Package compatibility (TSSOP-24) should be confirmed for direct footprint substitution.