Renesas X9315TM-2.7T1

Overview

X9315TM-2.7T1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap points, nonvolatile memory for power-up recall, 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 low-power operation (80 µA active, 5 µA standby). It serves as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits.

For engineers reviewing the X9315TM-2.7T1 datasheet, X9315TM-2.7T1 pinout, X9315TM-2.7T1 application, or X9315TM-2.7T1 equivalent, this page provides verified specifications, package details, real-world use cases, and validated alternative options - all confirmed against Intersil FN8179 Rev.2.00 and official ordering data.

Technical Context

The X9315TM-2.7T1 uses a 5-bit up/down counter driving a decoder that selects one of 32 wiper positions across a monolithic 31-resistor ladder. Wiper movement follows make-before-break switching, preventing open-circuit transients during position changes. Its nonvolatile memory stores wiper position on CS↑ with INC HIGH, enabling automatic restoration at next power-on.

It features temperature-compensated resistive elements with ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC, ensuring stable voltage division over temperature. Terminal voltages are limited to 0–VCC, and wiper resistance is 400–1000 Ω at 2.7V supply - critical for minimizing loading error in high-impedance feedback paths.

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 X9315TM-2.7T1, AD5243BRMZ100 offers dual-channel I²C control and 256-step resolution but adds bus overhead and lacks native power-up recall without firmware initialization; MCP41010-I/P provides SPI compatibility and finer granularity but its 10 kΩ RTOTAL risks degrading accuracy in high-impedance feedback networks where X9315TM-2.7T1's 100 kΩ is optimal.

Availability

X9315TM-2.7T1 is available at Aetrix Electronics and suitable for precision analog trimming, laser diode bias calibration, and programmable power supply feedback applications requiring stable component supply, long-term parametric consistency, and RoHS-compliant packaging.

Supply support for X9315TM-2.7T1 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 as a solid-state, nonvolatile alternative to mechanical potentiometers for analog parameter adjustment in embedded systems - emphasizing reliability, low power, and seamless integration into digital control architectures.

FAQ

What is the maximum wiper current rating for the X9315TM-2.7T1?

The X9315TM-2.7T1 has a maximum wiper current rating of ±3.75 mA under recommended operating conditions. This limit ensures safe operation without exceeding the 10 mW maximum power rating or inducing excessive self-heating in the 100 kΩ resistor array. Exceeding this current may cause permanent resistance drift or wiper contact degradation over time.

Does the X9315TM-2.7T1 retain its wiper position after power cycling?

Yes, the X9315TM-2.7T1 retains its wiper position after power cycling. The device stores the current wiper setting in nonvolatile EEPROM memory when CS transitions HIGH while INC is held HIGH. Upon subsequent power-up, the stored value is automatically recalled, restoring the wiper to its last saved position - a key feature confirmed in FN8179 Rev.2.00 Section "Principles of Operation".

Can the X9315TM-2.7T1 be used with a 3.3 V microcontroller GPIO interface?

Yes, the X9315TM-2.7T1 is fully compatible with 3.3 V microcontroller GPIOs. Its input thresholds are defined as VIH ≥ 0.7×VCC and VIL ≤ 0.1×VCC, so at VCC = 3.3 V, VIH ≥ 2.31 V and VIL ≤ 0.33 V - well within standard 3.3 V CMOS logic levels. No level-shifting circuitry is required for direct connection to most 3.3 V MCUs.

What is the wiper resistance of the X9315TM-2.7T1 at 2.7 V supply?

The wiper resistance of the X9315TM-2.7T1 is specified as 400 Ω (typical) to 1000 Ω (max) when operated at VCC = 2.7 V, per FN8179 Rev.2.00 Page 6, Potentiometer Characteristics table. This higher resistance compared to the 5 V condition (200–400 Ω) reflects increased channel resistance in the CMOS pass transistors at lower supply voltage.

Is the X9315TM-2.7T1 RoHS compliant and lead-free?

Yes, the X9315TM-2.7T1 is RoHS compliant and lead-free. Per FN8179 Rev.2.00 Page 2 Ordering Information and Notes 1–2, it uses Intersil's Pb-free material set with 100% matte tin (e3) termination finish, qualified for both SnPb and Pb-free reflow processes, and conforms to IPC/JEDEC J-STD-020 moisture sensitivity and reflow standards.