Renesas X9408WV24IZ

Overview

X9408WV24IZ from Intersil (now Renesas) is a quad digitally controlled potentiometer (XDCP™) IC implementing four independent 64-tap resistor arrays with volatile wiper counters and nonvolatile data registers, operating from 2.7V to 5.5V VCC and ±2.7V to ±5.5V analog supplies, used for precision analog parameter tuning in mixed-signal systems.

For engineers reviewing the X9408WV24IZ datasheet, X9408WV24IZ pinout, X9408WV24IZ application, or X9408WV24IZ equivalent, key selection considerations include its 10kΩ end-to-end resistance, 2-wire I²C-compatible interface, hardware write-protect (WP) pin, TSSOP-24 Pb-free RoHS-compliant package, and dual-supply analog operation supporting bipolar signal conditioning.

Technical Context

The X9408WV24IZ integrates four monolithic CMOS resistor arrays, each with 63 resistive elements and 64 tap points controlled by a 6-bit wiper counter register (WCR). Each array supports three-terminal potentiometer or two-terminal variable resistor configurations with VH/RH, VL/RL, and VW/RW terminals.

It uses a 2-wire serial interface (SCL/SDA) compliant with standard I²C timing (fSCL ≤ 400 kHz), with device addressing via A0–A3 inputs and hardware write protection via the WP pin. Nonvolatile storage retains wiper positions across power cycles with 100-year data retention and 100,000 write endurance per register bit.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), Pb-free (RoHS-compliant), industrial temperature range (−40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9408WV24IZ uniquely supports true bipolar analog operation, hardware write protection, and I²C compatibility-making it optimal for industrial instrumentation and mixed-signal systems requiring robust, field-reprogrammable analog trimming.

Availability

X9408WV24IZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and multi-channel audio trimming requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for X9408WV24IZ 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

Renesas Electronics (formerly Intersil) is a global semiconductor leader specializing in microcontrollers, analog, power management, and mixed-signal solutions for industrial, automotive, and communications markets.

The X9408WV24IZ belongs to the XDCP™ family of digitally controlled potentiometers designed specifically for replacing mechanical trimmers in high-reliability analog tuning applications where nonvolatile storage, low noise, and precise linearity are required.

FAQ

What is the absolute maximum voltage rating for the V+ and V− pins of the X9408WV24IZ?

The X9408WV24IZ supports V+ up to +10 V and V− down to −10 V, with a maximum differential voltage (V+ − V−) of 12 V. However, for reliable operation within specifications, V+ must be between +2.7 V and +5.5 V and V− between −2.7 V and −5.5 V. Exceeding these recommended ranges may cause parametric degradation or latch-up.

Does the X9408WV24IZ require external pull-up resistors on the SCL and SDA lines?

Yes, the X9408WV24IZ requires external pull-up resistors on both SCL and SDA because the SDA pin is open-drain and SCL is input-only. Typical values range from 1.8 kΩ to 10 kΩ depending on bus capacitance and desired rise time; the datasheet provides a graph for calculating optimal values based on measured bus capacitance.

How does the hardware write-protect (WP) pin function on the X9408WV24IZ?

The WP pin on the X9408WV24IZ is active-low: when held LOW, it disables all nonvolatile writes to the Data Registers (DR0–DR3), preventing accidental overwrites during normal operation or firmware updates. When WP is HIGH or floating (with internal pull-up inactive), nonvolatile writes are enabled. It does not affect volatile WCR writes or read operations.

Can the X9408WV24IZ operate with only a single supply, such as VCC = 3.3 V and V+ = 3.3 V, while leaving V− unconnected?

No. The X9408WV24IZ requires both V+ and V− to be powered within their specified ranges (±2.7 V to ±5.5 V) before applying any voltage to VH, VL, or VW pins. Leaving V− unconnected violates absolute maximum ratings and risks damage or undefined behavior. For unipolar operation, tie V− to VSS (ground) and ensure all analog signals stay within V− to V+.

What is the wiper response time after issuing a Write Wiper Counter Register command to the X9408WV24IZ?

The wiper response time after issuing a Write Wiper Counter Register command to the X9408WV24IZ is 10 µs maximum (tWRL), measured from the end of the instruction's acknowledge pulse. This fast settling enables real-time adjustments in closed-loop control systems and high-speed calibration routines without introducing latency bottlenecks.