Renesas X9315USIZT1

Overview

X9315USIZT1 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 to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (–40°C to +85°C) in Pb-free SOIC-8 package. It functions as a three-terminal voltage divider or two-terminal variable resistor in analog signal trimming applications.

For engineers reviewing the X9315USIZT1 datasheet, X9315USIZT1 pinout, X9315USIZT1 application, or X9315USIZT1 equivalent, key selection criteria include its 100kΩ total resistance value, 5µA standby current, make-before-break wiper switching, 100-year data retention, and compatibility with low-voltage microcontroller GPIOs driving the 3-wire interface.

Technical Context

The X9315USIZT1 integrates a 5-bit up/down counter, nonvolatile EEPROM for wiper position storage, and a 31-resistor ladder with electronic wiper switches. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction, and CS enables selection and initiates nonvolatile store on rising edge when INC is high.

Wiper movement follows a linear, non-wrapping trajectory across 32 discrete taps; the device uses temperature-compensated resistive elements with ±300 ppm/°C RTOTAL drift and ratiometric coefficient of ±20 ppm/°C. The wiper terminal exhibits 200Ω typical series resistance at VCC = 5V and 400–1000Ω at 2.7V.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (Pb-free), JEDEC MS-012-AA compliant, 5.0mm × 4.0mm footprint, 1.27mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ100 and MCP41010-I/P, the X9315USIZT1 uniquely combines 3-wire simplicity, guaranteed power-up restoration from nonvolatile memory, and industrial temperature rating-making it optimal for unattended or safety-critical analog trimming where deterministic startup behavior is mandatory.

Availability

X9315USIZT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply feedback trimming, and audio signal level control requiring stable component supply and long-term parametric consistency.

Supply support for X9315USIZT1 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) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.

The X9315 family was designed as a solid-state replacement for mechanical potentiometers in analog trimming applications requiring digital control, nonvolatile storage, and high reliability across extended temperature ranges.

FAQ

What is the total resistance value and tolerance of the X9315USIZT1?

The X9315USIZT1 has a nominal total resistance (RTOTAL) of 100kΩ with a tolerance of ±20% across temperature and unit variation. This value is fixed per device variant and confirmed in the Ordering Information table of the FN8179 datasheet. The X9315USIZT1 does not support dynamic resistance scaling-the 100kΩ value is inherent to its resistor array construction and applies to all operating conditions within specification.

Does the X9315USIZT1 retain its wiper position after power cycling?

Yes, the X9315USIZT1 stores the wiper position in nonvolatile EEPROM memory. Upon power-up, it automatically recalls the last stored value and sets the wiper to that tap position. This behavior is guaranteed by design and verified in the "Principles of Operation" section of the FN8179 datasheet. No external controller action is required for X9315USIZT1 to restore its prior state after power loss.

What supply voltage range is supported by the X9315USIZT1?

The X9315USIZT1 supports a supply voltage (VCC) range of 2.7V to 5.5V, as specified in the "Recommended Operating Conditions" table on page 6 of FN8179 Rev. 2.00. This dual-voltage capability allows direct use with both 3.3V and 5V logic systems. The X9315USIZT1 is not rated for operation below 2.7V or above 5.5V under normal conditions.

How many wiper positions does the X9315USIZT1 provide, and what is its resolution?

The X9315USIZT1 provides 32 discrete wiper positions across its 31-resistor array, yielding 3.125% resolution per step (1/31 ≈ 3.23% step size; 1/32 = 3.125% of full scale). This resolution is fixed and confirmed in the device description on page 1 and the "Principles of Operation" section. The X9315USIZT1 does not support interpolation or fractional tap positioning.

Is the X9315USIZT1 RoHS compliant and what package does it use?

Yes, the X9315USIZT1 is RoHS compliant and uses an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, pkg drawing M8.15) with 100% matte tin (e3) termination. This is explicitly stated in Note 2 of the Ordering Information table and confirmed in the "Plastic Small Outline Packages (SOIC)" mechanical drawing on page 16 of FN8179 Rev. 2.00. The X9315USIZT1 meets IPC/JEDEC J-STD-020 reflow requirements for Pb-free assembly.