Renesas X9315WMIZT1

Overview

X9315WMIZT1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates at 2.7V–5.5V supply, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (−40°C to +85°C) in an 8-lead MSOP package. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming applications.

For engineers reviewing the X9315WMIZT1 datasheet, X9315WMIZT1 pinout, X9315WMIZT1 application, or X9315WMIZT1 equivalent, this page provides verified technical context, confirmed pin roles, real-world use cases in signal conditioning and power supply feedback, and validated alternative parts with documented functional and parametric differences.

Technical Context

The X9315WMIZT1 integrates a 5-bit up/down counter, nonvolatile EEPROM for wiper position retention, and a decoder-driven switching network across 31 resistive elements. Its wiper movement follows make-before-break switching, preventing open-circuit transients during tap transitions.

Control logic responds to negative-edge-triggered INC input while direction is set by U/D level; CS enables selection and initiates nonvolatile store when raised high with INC high. The device enters standby mode (5 µA max) when deselected, and recalls last stored wiper position on power-up.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free), JEDEC MO-187AA compliant, body dimensions 3.0 mm × 3.0 mm × 0.85 mm (M8.118 drawing).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP41010-I/P, the X9315WMIZT1 uniquely combines 3-wire simplicity, guaranteed nonvolatile recall, and industrial temperature qualification-making it optimal for embedded systems requiring robust, self-contained analog trimming without bus overhead or external memory management.

Availability

X9315WMIZT1 is available at Aetrix Electronics and suitable for industrial motor control feedback loops, medical sensor calibration circuits, and telecom power management systems requiring stable component supply, RoHS-compliant packaging, and long-lifecycle support.

Supply support for X9315WMIZT1 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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs focused on power management, precision analog, and interface solutions for industrial, computing, and communications markets.

The X9315WMIZT1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered to replace electromechanical trimmers in applications demanding reliability, programmability, and nonvolatile setting retention under harsh environmental conditions.

FAQ

What is the maximum wiper current rating for the X9315WMIZT1?

The X9315WMIZT1 has a maximum wiper current rating of ±3.75 mA under recommended operating conditions. This limit ensures safe operation without exceeding the 10 mW maximum power rating or causing excessive wiper resistance drift. Exceeding this current may degrade long-term reliability or cause temporary resistance deviation due to self-heating. Always verify current through RW/VW in your circuit using worst-case RH–RL voltage differential and RTOTAL.

Does the X9315WMIZT1 retain its wiper position after power cycling?

Yes, the X9315WMIZT1 retains its wiper position after power cycling because it stores the last valid wiper setting in nonvolatile EEPROM memory. Upon power-up, the device automatically recalls that value and configures the wiper to the corresponding tap position. This behavior is guaranteed across the full −40°C to +85°C industrial temperature range and supports 100-year data retention per specification.

Can the X9315WMIZT1 operate from a 3.3 V supply?

Yes, the X9315WMIZT1 operates from 2.7 V to 5.5 V, making it fully compatible with standard 3.3 V logic and supply rails. At 3.3 V, typical wiper resistance increases to 400–1000 Ω (vs. 200–400 Ω at 5 V), and active current remains ≤80 µA. All timing parameters-including tCYC (4 µs min) and tIW (1–5 µs)-remain valid at 3.3 V per the datasheet's "X9315-2.7" variant specifications.

Is the X9315WMIZT1 pin-compatible with other members of the X9315 family?

Yes, all X9315 variants-including X9315WMIZT1, X9315WMZT1, and X9315WSIZT1-share identical 8-lead MSOP pinouts and electrical pin functions. Differences lie only in RTOTAL (10 kΩ), temperature grade (−40°C to +85°C), and supply voltage range (2.7–5.5 V), not in physical layout or signal mapping. No PCB redesign is required when substituting within the same package type.

What is the absolute linearity error specification for the X9315WMIZT1?

The X9315WMIZT1 has an absolute linearity error of ±1 MI (Minimum Increment), where MI = RTOTAL / 31 ≈ 322 Ω for the 10 kΩ version. This means the actual wiper voltage deviates from ideal by no more than ±322 Ω worth of resistance at any tap position. Relative linearity is tighter at ±0.2 MI, ensuring consistent step-to-step matching critical for monotonic analog control.