Renesas X9315UMIZ

Overview

X9315UMIZ 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 5V ±10%, delivers 50kΩ end-to-end resistance, supports -40°C to +85°C industrial temperature range, and functions as a three-terminal voltage divider or two-terminal variable resistor in analog signal conditioning circuits.

For engineers reviewing the X9315UMIZ datasheet, X9315UMIZ pinout, X9315UMIZ application, or X9315UMIZ equivalent, key selection considerations include its MSOP-8 Pb-free RoHS-compliant package, 5µA standby current, ±1 MI absolute linearity, 200Ω typical wiper resistance at 5V, and EEPROM-based power-up recall capability for stable trim retention across power cycles.

Technical Context

The X9315UMIZ integrates a 5-bit up/down counter, 5-bit nonvolatile memory, and a 31-resistor ladder with make-before-break wiper switching. Wiper position is updated on negative-edge transitions of INC while CS is low, with direction controlled by U/D logic level.

Nonvolatile store occurs when CS rises while INC is high, initiating a 5–10 ms EEPROM write cycle. The device maintains wiper position during power-down and recalls it on power-up, enabling deterministic startup behavior without host initialization.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ50 and MCP41050-I/P, the X9315UMIZ offers deterministic power-up behavior without host intervention, minimal GPIO footprint (3 pins), and faster wiper updates (4 µs cycle time), making it optimal for self-contained analog trim in resource-constrained industrial systems.

Availability

X9315UMIZ is available at Aetrix Electronics and suitable for industrial sensor calibration, audio equipment manufacturing, and programmable power supply design requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant packaging.

Supply support for X9315UMIZ 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 for industrial, communications, and computing markets, with emphasis on reliability and precision.

The X9315UMIZ belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) product line, engineered for replacing mechanical trimmers in analog signal path calibration where nonvolatile setting retention, low power, and industrial temperature operation are essential.

FAQ

What is the operating voltage range for the X9315UMIZ?

The X9315UMIZ operates at 5 V ±10%, meaning its valid supply range is 4.5 V to 5.5 V. It is not rated for 2.7 V operation - that specification applies only to the X9315-2.7 variant family. Using voltages outside this range may cause functional failure or reduced reliability. The X9315UMIZ datasheet explicitly specifies VCC limits as 4.5–5.5 V under recommended operating conditions.

Does the X9315UMIZ retain its wiper position after power loss?

Yes, the X9315UMIZ retains its last-stored wiper position in nonvolatile EEPROM memory. Upon power-up, it automatically recalls that value and sets the wiper accordingly. This behavior is guaranteed across the full -40°C to +85°C temperature range and supports 100-year data retention per specification. The store operation is triggered by a rising edge on CS while INC is held HIGH.

What package type and lead finish does the X9315UMIZ use?

The X9315UMIZ uses an 8-lead MSOP package (JEDEC MO-187AA, drawing M8.118) with Pb-free (RoHS-compliant) 100% matte tin plating. Its dimensions are 3.0 mm × 3.0 mm × 0.85 mm. The "Z" suffix in the part number explicitly denotes the Pb-free termination, and the ordering table confirms "8 Ld MSOP (Pb-free)" for X9315UMIZ.

How many wiper positions does the X9315UMIZ support, and what is its resolution?

The X9315UMIZ supports 32 discrete wiper positions, corresponding to 31 resistive elements in its ladder network. Its resolution is 3.125% of full scale per step (1/32). Absolute linearity is specified as ±1 MI (minimum increment), translating to ±3.2% full-scale voltage error at any given tap - a confirmed parameter from the Potentiometer Characteristics table in the FN8179 datasheet.

Can the X9315UMIZ be used as a two-terminal variable resistor?

Yes, the X9315UMIZ can be configured as a two-terminal variable resistor by connecting either RH/VH or RL/VL to RW/VW and using the remaining fixed terminal plus the wiper. This configuration is explicitly supported in the Applications Information section and Basic Circuits diagram on page 12 of the FN8179 datasheet, where it is shown driving current through a load in series with the wiper.