Renesas X9315TMIT1

Overview

X9315TMIT1 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 X9315TMIT1 datasheet, X9315TMIT1 pinout, X9315TMIT1 application, or X9315TMIT1 equivalent, key selection criteria include its 100 kΩ total resistance value, nonvolatile memory retention (100 years), low standby current (5 µA), make-before-break wiper switching, and compatibility with 2.7V–5.5V logic-level control signals.

Technical Context

The X9315TMIT1 integrates a 5-bit up/down counter, 5-bit nonvolatile memory, and a 31-resistor ladder with electronic wiper switches. Wiper position is controlled via edge-triggered INC input synchronized with U/D direction and CS enable, enabling discrete tap-by-tap adjustment without microcontroller firmware overhead.

It uses CMOS technology with temperature-compensated resistive elements, achieving ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC. The wiper terminal exhibits 200 Ω typical series resistance at VCC = 5V and 400–1000 Ω at VCC = 2.7V, with noise performance of −120 dBV referenced to 1 kHz.

Key Specifications

Pinout & Package

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

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 X9315TMIT1 offers superior long-term data retention (100 years), simpler 3-wire control (no address decoding), and guaranteed industrial temperature operation - making it optimal for unattended industrial instrumentation where calibration integrity must persist for decades.

Availability

X9315TMIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, laser diode biasing, and programmable audio level control requiring stable component supply across extended product lifecycles.

Supply support for X9315TMIT1 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, communications, and computing markets.

The X9315 product line was designed for solid-state replacement of mechanical potentiometers in analog trimming applications requiring nonvolatile setting retention, low power, and industrial temperature reliability.

FAQ

What is the total resistance value and tolerance of the X9315TMIT1?

The X9315TMIT1 has a nominal end-to-end resistance (RTOTAL) of 100 kΩ with a tolerance of ±20% across temperature and unit-to-unit variation. This value is confirmed in the Ordering Information table on page 2 of FN8179 Rev.2.00 and applies specifically to the "TM" prefix variants, including X9315TMIT1. The tolerance remains valid over the full industrial temperature range (−40°C to +85°C).

Does the X9315TMIT1 retain its wiper position after power loss?

Yes, the X9315TMIT1 stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior is guaranteed for 100 years under normal operating conditions, as specified in the Endurance and Data Retention table on page 7 of FN8179 Rev.2.00. The store operation is initiated by raising CS while INC is held HIGH.

What package type and footprint does the X9315TMIT1 use?

The X9315TMIT1 is packaged in an 8-lead Mini Small Outline Plastic (MSOP) package per JEDEC MO-187AA, designated M8.118. Its dimensions are 3.0 mm × 3.0 mm × 0.85 mm with 0.65 mm lead pitch. Pin 1 is marked by a dot or notch, and the package is Pb-free and RoHS-compliant, as confirmed in the Ordering Information and Package Outline Drawing sections (pages 2 and 13).

Can the X9315TMIT1 operate from a 3.3V supply?

Yes, the X9315TMIT1 supports VCC from 2.7 V to 5.5 V, fully covering 3.3 V operation. Its logic inputs (CS, U/D, INC) accept VIH ≥ 0.7 × VCC and VIL ≤ 0.1 × VCC, ensuring reliable interfacing with 3.3 V microcontrollers. DC Electrical Specifications on page 7 confirm ICC1 active current of 80 µA max at VCC = 5 V and scalability down to 2.7 V.

How many wiper positions does the X9315TMIT1 provide, and what is the resolution?

The X9315TMIT1 provides exactly 32 discrete wiper tap positions, corresponding to a 5-bit counter. Resolution is defined as RTOTAL/31 ≈ 3.226 kΩ per step for the 100 kΩ variant. Absolute linearity error is ±1 minimum increment (MI), and relative linearity error is ±0.2 MI, as specified in the Potentiometer Characteristics table on page 6.