Renesas X9315TMI-2.7T2

Overview

X9315TMI-2.7T2 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 discrete wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates from 2.7V to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (–40°C to +85°C) in an 8-lead MSOP package. It serves as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits.

For engineers reviewing the X9315TMI-2.7T2 datasheet, X9315TMI-2.7T2 pinout, X9315TMI-2.7T2 application, or X9315TMI-2.7T2 equivalent, this page provides verified technical context, exact pin functions, real-world use scenarios, confirmed alternative parts with documented differences, and supply-chain support details specific to the X9315TMI-2.7T2 variant.

Technical Context

The X9315TMI-2.7T2 uses a 5-bit up/down counter driving a 32-position decoder to select one of 32 wiper taps across a monolithic 31-resistor ladder. Wiper position is stored in nonvolatile EEPROM upon CS↑ while INC = HIGH, enabling power-up recall without external configuration.

Its 3-wire interface operates with make-before-break switching, ensuring continuity during wiper transitions. Terminal voltage range spans 0 V to VCC, wiper resistance is 400–1000 Ω at 2.7 V, and absolute linearity error is limited to ±1 MI (minimum increment), supporting stable analog control in closed-loop systems.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free, 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 AD5175BRMZ-100 and MCP41010-I/P, the X9315TMI-2.7T2 offers deterministic 3-wire control with zero protocol overhead, guaranteed nonvolatile recall, and lowest active current-making it optimal for resource-constrained industrial controllers where reliability and simplicity are critical.

Availability

X9315TMI-2.7T2 is available at Aetrix Electronics and suitable for industrial sensor calibration, motor control feedback loops, and programmable power supply trimming requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9315TMI-2.7T2 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, computing, and communications markets, emphasizing reliability, precision, and low-power operation.

The X9315 family was engineered specifically for solid-state replacement of mechanical potentiometers in analog trimming applications-prioritizing nonvolatile recall, wide supply range, and robust temperature performance over high resolution or complex interfaces.

FAQ

What is the maximum wiper current rating for the X9315TMI-2.7T2?

The X9315TMI-2.7T2 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 thermal degradation of the internal resistor array or wiper switches. Exceeding this current may cause irreversible resistance drift or open-circuit failure. The X9315TMI-2.7T2 wiper resistance ranges from 400 Ω to 1000 Ω at 2.7 V, so voltage differentials across RW/VW must remain below ~3.75 V to stay within spec.

Does the X9315TMI-2.7T2 require external components to operate?

No, the X9315TMI-2.7T2 operates autonomously with only VCC, VSS, and the three control signals (CS, U/D, INC); no external capacitors, resistors, or clock sources are required. Its internal nonvolatile memory retains wiper position without backup power, and the 3-wire interface needs no pull-ups or level shifters for 2.7–5.5 V systems. The X9315TMI-2.7T2 is designed for drop-in replacement of mechanical potentiometers with minimal board-level changes.

How does the X9315TMI-2.7T2 handle power-up sequencing?

The X9315TMI-2.7T2 has no strict power-up sequencing requirement: VCC may ramp before or after signals on RH/VH, RL/VL, or RW/VW, provided VCC ≥ all terminal voltages. Upon power-up, the device automatically recalls the last stored wiper position from nonvolatile memory within 5 µs. The X9315TMI-2.7T2 enters standby mode until CS is asserted, eliminating spurious wiper movement during supply stabilization.

Can the X9315TMI-2.7T2 be used in a two-terminal variable resistor configuration?

Yes, the X9315TMI-2.7T2 supports two-terminal operation by connecting either RH/VH or RL/VL to RW/VW and using the remaining fixed terminal with VSS or VCC. In this mode, it functions as a digitally adjustable resistor with 32 discrete values between 0 Ω and RTOTAL (100 kΩ). The X9315TMI-2.7T2 maintains its ±20% end-to-end tolerance and temperature coefficients in this configuration, making it suitable for programmable current limiting or bias network adjustment.

What is the wiper resistance specification for the X9315TMI-2.7T2 at 2.7 V?

The wiper resistance (RW) of the X9315TMI-2.7T2 is specified as 400 Ω (typical) to 1000 Ω (maximum) when operated at VCC = 2.7 V. This value represents the series resistance between the wiper terminal (RW/VW) and the selected tap node, directly impacting loading error in high-impedance voltage divider applications. The X9315TMI-2.7T2 wiper resistance increases at lower supply voltages due to CMOS switch R_ON characteristics, and must be factored into gain/offset calculations for precision analog circuits.