Renesas X9429WV14Z-2.7

Overview

X9429WV14Z-2.7 from Intersil is a single-channel, 64-tap digitally controlled potentiometer (XDCP™) with 2-wire I²C-compatible interface, 10 kΩ end-to-end resistance, 2.7 V to 5.5 V supply operation, and non-volatile storage of four wiper positions - used for precision gain/offset trimming in analog signal chains.

For engineers reviewing the X9429WV14Z-2.7 datasheet, X9429WV14Z-2.7 pinout, X9429WV14Z-2.7 application, or X9429WV14Z-2.7 equivalent, key selection criteria include its 14-lead TSSOP package, 150 Ω typical wiper resistance at 5 V, <3 µA standby current, power-on recall from DR0, and hardware write-protect (WP) pin for register integrity.

Technical Context

The X9429WV14Z-2.7 implements a monolithic CMOS resistor ladder with 63 segments and 64 tap points, decoded via a 6-bit volatile Wiper Counter Register (WCR). Its 2-wire bus supports read/write/transfer operations across four non-volatile data registers (DR0–DR3), with DR0 auto-loaded to WCR at power-up.

Interface logic includes dedicated SCL/SDA pins, three address inputs (A0/A2/A3) enabling up to eight devices on one bus, and a hardware WP pin that disables non-volatile writes when asserted low - all operating within 0°C to +70°C ambient range and RoHS-compliant 14-lead TSSOP packaging.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4 mm wide), RoHS-compliant, thermal resistance θ_JA = 92 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP4017T-103I/OT, the X9429WV14Z-2.7 uniquely combines hardware write protection, four independent non-volatile registers, and 14-lead TSSOP packaging - making it optimal for industrial systems requiring robust, multi-point calibration with field update capability.

Availability

X9429WV14Z-2.7 is available at Aetrix Electronics and suitable for precision analog trimming, sensor calibration, and programmable power supply design requiring stable component supply across extended product lifecycles.

Supply support for X9429WV14Z-2.7 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 Corporation is a leading provider of precision analog and power management ICs, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9429 product line delivers digitally programmable resistance for calibration-critical analog signal paths - designed specifically for applications demanding non-volatile storage, low noise, and seamless I²C integration without external memory.

FAQ

What is the operating temperature range for the X9429WV14Z-2.7?

The X9429WV14Z-2.7 is specified for commercial temperature operation from 0°C to +70°C. This range is confirmed in the Ordering Information table on page 2 of the FN8248 datasheet, which explicitly lists "0 to +70" under TEMP RANGE (°C) for the X9429WV14Z-2.7 variant. It does not support industrial-grade -40°C to +85°C operation - that requires the X9429WV14IZ-2.7 variant.

Does the X9429WV14Z-2.7 support true 2-wire I²C communication?

Yes, the X9429WV14Z-2.7 supports standard 2-wire I²C protocol with SCL and open-drain SDA pins, including START/STOP conditions, ACK/NACK handshaking, and 7-bit slave addressing with three configurable address bits (A0/A2/A3). The datasheet confirms full compatibility with I²C timing specifications up to 400 kHz, and Figure 1 shows the complete 8-bit slave address format including the fixed device type identifier 0101b.

How many non-volatile registers does the X9429WV14Z-2.7 have, and what are their functions?

The X9429WV14Z-2.7 contains four 6-bit non-volatile data registers (DR0–DR3), each capable of storing a wiper position or general-purpose calibration data. DR0 is automatically loaded into the volatile Wiper Counter Register (WCR) at power-up. All four registers support independent read/write/transfer operations via the 2-wire interface, enabling storage of multiple calibrated states for different operating modes or sensors.

What is the purpose of the WP pin on the X9429WV14Z-2.7?

The WP (Write Protect) pin on the X9429WV14Z-2.7 is an active-low hardware input that disables all non-volatile writes to the four data registers (DR0–DR3) when pulled low. This prevents accidental overwriting of calibrated values during system operation or firmware updates. The pin has no effect on volatile WCR writes or read operations - only on EEPROM-style storage actions, as defined in the Pin Descriptions section on page 4 of the datasheet.

Can the X9429WV14Z-2.7 be used as a two-terminal variable resistor?

Yes, the X9429WV14Z-2.7 can be configured as a two-terminal variable resistor by connecting either RH/VH or RL/VL to the wiper terminal (RW/VW), while leaving the other end open or grounded depending on topology. The datasheet explicitly states this capability on page 1, noting "The XDCP can be used as a three-terminal potentiometer or as a two terminal variable resistor," and Figure 16 on page 16 illustrates both configurations with functional diagrams.