Renesas X9420YV14Z

Overview

X9420YV14Z from Intersil is a single-channel, low-noise, low-power digitally controlled potentiometer (XDCP™) with SPI interface, 2.5kΩ end-to-end resistance, 64-tap resolution, and ±1% absolute linearity-used for precision voltage divider and variable resistor functions in analog signal conditioning circuits.

For engineers reviewing the X9420YV14Z datasheet, X9420YV14Z pinout, X9420YV14Z application, or X9420YV14Z equivalent, key selection considerations include its 14-lead TSSOP (RoHS-compliant Pb-free) package, dual-supply analog operation (±2.7V to ±5.5V), nonvolatile data register storage (100-year retention), and SPI-compatible serial control with wiper position recall on power-up.

Technical Context

The X9420YV14Z implements a monolithic CMOS 63-resistor-segment array with CMOS-switched wiper controlled by a volatile 6-bit Wiper Counter Register (WCR). Its SPI interface supports direct read/write of wiper position and four nonvolatile 6-bit Data Registers (DR0–DR3), enabling persistent storage of up to four distinct wiper settings.

Power-up behavior loads DR0 into the WCR; hardware write protection (WP pin) disables nonvolatile writes to Data Registers while allowing volatile wiper updates. Analog supplies V+ and V− operate independently from digital supply VCC (2.7V–5.5V), supporting bipolar signal routing across VH/RH, VL/RL, and VW/RW terminals.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm width), RoHS-compliant Pb-free finish (M14.173 drawing), 0°C to +70°C operating range.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with ISL22416 and ISL95311, the X9420YV14Z uniquely supports true bipolar analog signal routing (±2.7V to ±5.5V) and offers nonvolatile storage of four wiper positions-making it optimal for precision calibration in mixed-signal industrial and test equipment where supply headroom and data persistence are critical.

Availability

X9420YV14Z is available at Aetrix Electronics and suitable for precision analog trimming, programmable gain control, and voltage regulator feedback applications requiring stable component supply and long-term calibration integrity.

Supply support for X9420YV14Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9420 series was designed as a solid-state replacement for mechanical potentiometers in industrial, medical, and test equipment-emphasizing nonvolatile configuration storage, low noise, and robust SPI-controlled analog signal conditioning.

FAQ

What is the exact end-to-end resistance value and tolerance of the X9420YV14Z?

The X9420YV14Z has a nominal end-to-end resistance of 2.5kΩ with a tolerance of ±20%, as specified in the datasheet's Analog Characteristics table. This value applies across the full operating temperature range (0°C to +70°C) and is measured between the VH/RH and VL/RL pins under standard conditions. The actual resistance may vary within tolerance due to process variation but remains stable over time and temperature.

Does the X9420YV14Z support true bipolar analog operation, and what are the valid supply ranges?

Yes, the X9420YV14Z supports true bipolar analog operation using separate V+ and V− supplies. Valid ranges are V+ = +2.7V to +5.5V and V− = −2.7V to −5.5V, enabling the wiper (VW/RW) to swing fully between these rails. This allows direct use in bipolar signal paths-such as audio stages or sensor interfaces-without external level-shifting circuitry.

How many nonvolatile data registers does the X9420YV14Z have, and what is their retention capability?

The X9420YV14Z includes four 6-bit nonvolatile Data Registers (DR0–DR3) with guaranteed data retention of 100 years at +25°C. Each register can store a wiper position or general-purpose system parameter. Nonvolatile writes require a CS HIGH-to-LOW transition after data transmission and take up to 10ms to complete, as indicated by the Write In Process (WIP) status bit.

What is the function of the HOLD pin on the X9420YV14Z, and how must it be used?

The HOLD pin on the X9420YV14Z pauses ongoing SPI communication without resetting the command sequence. To pause, HOLD must be driven LOW while SCK is LOW; to resume, HOLD is returned HIGH-again with SCK LOW. If unused, HOLD must be held HIGH. This feature enables arbitration on shared buses or temporary interruption of potentiometer updates without losing transaction context.

Can the X9420YV14Z be used as a two-terminal variable resistor, and how is that configured?

Yes, the X9420YV14Z can be used as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the wiper (VW/RW), leaving the other terminal open or grounded depending on polarity requirements. This configuration eliminates the third terminal and converts the device into a digitally adjustable rheostat-commonly used for gain control, current limiting, or bias current setting in amplifier circuits.