Renesas X9315TMI

Overview

X9315TMI 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 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 three-terminal voltage divider or two-terminal variable resistor in analog signal conditioning circuits.

For engineers reviewing the X9315TMI datasheet, X9315TMI pinout, X9315TMI application, or X9315TMI equivalent, this page provides verified technical context, exact pin roles, confirmed RTOTAL = 100kΩ value, wiper resistance (400–1000Ω at 2.7V), noise performance (–120 dBV), and industrial-grade reliability specs including 100,000 endurance cycles and 100-year data retention.

Technical Context

The X9315TMI uses a 5-bit up/down counter driving a decoder that selects one of 32 wiper positions across a monolithic 31-resistor array. Wiper movement follows make-before-break switching, preventing open-circuit transients during tap transitions. The device stores wiper position in nonvolatile EEPROM upon CS↑ while INC = HIGH, enabling automatic recall at power-up.

It supports ratiometric operation with terminal voltages bounded by VSS and VCC, exhibits ±300 ppm/°C total resistance temperature coefficient, and maintains absolute linearity within ±1 MI (minimum increment = RTOTAL/31). Its low-power CMOS design draws ≤5 µA standby current and ≤400 µA during EEPROM store operations.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free matte tin termination, dimensions 3.0 mm × 3.0 mm × 0.85 mm (D × E × A2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ100 and MCP41010-I/P, the X9315TMI offers guaranteed industrial temperature operation, 2.7 V compatibility, and deterministic 3-wire timing-making it optimal for ruggedized analog trimming where interface simplicity and supply flexibility outweigh resolution requirements.

Availability

X9315TMI is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply trim, laser diode biasing, and portable audio signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9315TMI 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, aerospace, and communications markets.

The X9315TMI belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in analog signal path trimming, calibration, and gain/offset adjustment applications demanding nonvolatile storage and robust environmental performance.

FAQ

What is the exact end-to-end resistance value and tolerance of the X9315TMI?

The X9315TMI has a nominal end-to-end resistance (RTOTAL) of 100 kΩ with a tolerance of ±20% over the full industrial temperature range (–40°C to +85°C). This value is confirmed in the Ordering Information table on page 2 of FN8179 Rev.2.00 and applies specifically to the X9315TMI variant. The tolerance remains valid under all recommended operating conditions and is not degraded by nonvolatile store cycles or wiper movement.

Does the X9315TMI retain its wiper position after power loss?

Yes, the X9315TMI retains its wiper position after power loss using on-chip EEPROM. When CS transitions HIGH while INC is HIGH, the current wiper position is stored nonvolatily and automatically recalled at next power-up. This behavior is intrinsic to the X9315TMI and requires no external components. Data retention is rated for 100 years per the datasheet's Endurance and Data Retention section.

What is the supply voltage range supported by the X9315TMI?

The X9315TMI supports a supply voltage (VCC) range of 2.7 V to 5.5 V, as specified in the Recommended Operating Conditions table (page 6) and confirmed in the Ordering Information for X9315TMI variants. This dual-voltage capability allows direct interfacing with both 3.3 V and 5 V microcontrollers without level shifters, distinguishing it from 5 V-only alternatives like the MCP41010-I/P.

How many wiper positions does the X9315TMI provide, and what is the underlying architecture?

The X9315TMI provides exactly 32 wiper positions, implemented via a 31-resistor ladder array and a 5-bit up/down counter driving a decoder. Each position corresponds to a discrete tap point between resistors, with minimum increment (MI) defined as RTOTAL/31. This architecture is explicitly detailed in the "Principles of Operation" section (page 4) and block diagram (page 2) of FN8179 Rev.2.00.

What package type and footprint does the X9315TMI use?

The X9315TMI uses an 8-lead MSOP package per JEDEC MO-187AA (package drawing M8.118), with body dimensions 3.0 mm × 3.0 mm × 0.85 mm. Pin 1 is located at the top-left corner adjacent to the index area, and the package is RoHS-compliant with Pb-free matte tin termination. This footprint is distinct from SOIC or PDIP variants and requires specific land pattern dimensions per the M8.118 outline drawing (page 13).