Renesas X9315UMZ-2.7

Overview

X9315UMZ-2.7 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 from 2.7V to 5.5V, features 50kΩ end-to-end resistance, ±20% tolerance, and is rated for 0°C to +70°C commercial temperature range in an 8-lead MSOP package. It serves as a solid-state replacement for mechanical potentiometers in precision analog trimming applications.

For engineers reviewing the X9315UMZ-2.7 datasheet, X9315UMZ-2.7 pinout, X9315UMZ-2.7 application, or X9315UMZ-2.7 equivalent, this page delivers verified specifications including wiper resistance (400–1000Ω at 2.7V), active current (80µA max), standby current (5µA), absolute linearity (±1 MI), and ratiometric temperature coefficient (±20 ppm/°C) - all confirmed for the exact X9315UMZ-2.7 variant.

Technical Context

The X9315UMZ-2.7 integrates a 5-bit up/down counter, nonvolatile memory for wiper position retention, and a resistor array with make-before-break switching. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction, and CS enables selection and initiates nonvolatile store on HIGH transition with INC HIGH.

It uses CMOS technology with VCC-referenced terminal voltage limits (0 to VCC), supports 3-terminal potentiometer or 2-terminal variable resistor configurations, and maintains wiper position across power cycles via EEPROM-based memory with 100-year data retention and 100,000 endurance cycles.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free), JEDEC MO-187AA compliant, 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 AD5241BRMZ50 and MCP41050-I/P, the X9315UMZ-2.7 offers native 2.7 V operation, simpler 3-wire control, and guaranteed 400–1000 Ω wiper resistance at low supply - making it optimal for cost-sensitive, low-voltage, and minimal-peripheral embedded trimming.

Availability

X9315UMZ-2.7 is available at Aetrix Electronics and suitable for laser diode bias control, audio volume trimming, ADC reference scaling, and power supply feedback divider applications requiring stable component supply, long-term obsolescence mitigation, and RoHS-compliant packaging.

Supply support for X9315UMZ-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 (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.

The X9315UMZ-2.7 belongs to the XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in analog signal conditioning, calibration, and programmable biasing applications where reliability, nonvolatility, and low-voltage operation are essential.

FAQ

What is the maximum wiper current rating for the X9315UMZ-2.7?

The X9315UMZ-2.7 has a maximum wiper current rating of ±3.75 mA under recommended operating conditions. This limit ensures safe operation within the 10 mW maximum power rating and prevents degradation of the resistor array or wiper switches. Exceeding this current may cause irreversible resistance drift or reduced endurance. The X9315UMZ-2.7 wiper resistance (400–1000 Ω at 2.7 V) further constrains usable current in low-voltage applications.

Does the X9315UMZ-2.7 retain its wiper position after power loss?

Yes, the X9315UMZ-2.7 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This feature is enabled by an EEPROM cell that retains data for 100 years and withstands 100,000 store cycles. The X9315UMZ-2.7 performs automatic recall during power-up sequencing without requiring host intervention, ensuring repeatable startup behavior in unattended systems.

Can the X9315UMZ-2.7 operate from a 3.3 V supply?

Yes, the X9315UMZ-2.7 is fully specified for operation from 2.7 V to 5.5 V, making it compatible with standard 3.3 V logic and power domains. All electrical parameters-including active current (80 µA), standby current (5 µA), and wiper resistance-are validated across this range. The X9315UMZ-2.7 maintains ±20% end-to-end resistance tolerance and ±20 ppm/°C ratiometric temperature coefficient at 3.3 V.

What is the pin-compatible alternative to the X9315UMZ-2.7 in SOIC-8?

The X9315USZ-2.7 is the SOIC-8 pin-compatible variant of the same device, sharing identical electrical specifications, 3-wire interface, and 50 kΩ resistance value. It differs only in package (8-lead SOIC, M8.15) and thermal characteristics (θJA = 105°C/W vs. 154°C/W for MSOP). The X9315UMZ-2.7 and X9315USZ-2.7 share identical pinout, timing, and functional behavior-enabling drop-in replacement where board space or assembly process favors SOIC.

How does the X9315UMZ-2.7 handle wiper movement across multiple taps?

The X9315UMZ-2.7 uses make-before-break switching during wiper movement, temporarily connecting multiple taps to the RW/VW terminal for tIW (1–5 µs). This prevents open-circuit transients but may reduce effective RTOTAL momentarily if moving >1 tap. The X9315UMZ-2.7 does not wrap around at extremes: wiper stops at tap 0 or 31. Movement timing is governed by tCYC (4 µs minimum INC cycle) and tIW, both verified for the X9315UMZ-2.7 at 2.7 V.