Renesas X9315TM-2.7

Overview

X9315TM-2.7 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 discrete wiper tap points, nonvolatile wiper position storage, and low-power CMOS operation. It functions as a three-terminal voltage divider or two-terminal variable resistor in analog signal conditioning circuits, supporting VCC from 2.7V to 5.5V, ±3.75mA max wiper current, and 100kΩ end-to-end resistance.

For engineers reviewing the X9315TM-2.7 datasheet, X9315TM-2.7 pinout, X9315TM-2.7 application, or X9315TM-2.7 equivalent, this device is selected for precision analog trimming where power efficiency, temperature-stable resistance matching, and automatic power-up recall of last setting are required in industrial sensor interfaces and programmable gain stages.

Technical Context

The X9315TM-2.7 uses a 5-bit up/down counter driving a decoder to select one of 32 wiper positions across a monolithic resistor ladder. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction, and CS enables selection or initiates nonvolatile store on rising edge with INC HIGH.

Wiper switching operates in make-before-break mode, ensuring continuity during position changes. The device retains wiper state for 100 years and withstands 100,000 data changes per bit, with ratiometric temperature coefficient of ±20 ppm/°C and absolute linearity error limited to ±1 MI (minimum increment).

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free), JEDEC MO-187AA compliant, dimensions 3.0mm × 3.0mm × 0.85mm (D × E × A2), thermal resistance θJA = 154°C/W.

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 X9315TM-2.7 offers unique advantages in ultra-low standby current (5µA), guaranteed power-up wiper recall without firmware intervention, and optimized 3-wire timing for resource-constrained MCUs-making it ideal for maintenance-free analog trimming in remote or battery-operated equipment.

Availability

X9315TM-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifier design, and power supply trim requiring stable component supply with full RoHS compliance and long-term lifecycle support.

Supply support for X9315TM-2.7 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, communications, and computing markets, emphasizing reliability and precision.

The X9315 product line delivers solid-state digitally controlled potentiometers targeting applications where mechanical potentiometer wear, environmental instability, or manual calibration are unacceptable-enabling programmable analog front-ends in harsh or inaccessible environments.

FAQ

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

The X9315TM-2.7 specifies a maximum wiper current (IW) of ±3.75mA under recommended operating conditions. This limit ensures safe operation within the 10mW maximum power rating and prevents degradation of the wiper switch contacts or resistor elements. Exceeding this current may cause irreversible resistance drift or increased noise in the X9315TM-2.7.

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

Yes, the X9315TM-2.7 stores the last wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior requires that the wiper position was previously stored using the CS HIGH + INC HIGH sequence. The X9315TM-2.7 guarantees 100-year data retention and 100,000 store cycles, making it suitable for unattended recalibration systems.

Can the X9315TM-2.7 operate from a 3.3V supply?

Yes, the X9315TM-2.7 supports VCC from 2.7V to 5.5V, fully covering standard 3.3V logic supplies. At 3.3V, active current remains ≤80µA, wiper resistance is approximately 600Ω, and all timing parameters-including tCYC (4µs) and tIW (1–5µs)-remain valid per the FN8179 datasheet. The X9315TM-2.7 maintains full functionality without derating.

What is the temperature coefficient of the X9315TM-2.7's end-to-end resistance?

The X9315TM-2.7 has an RTOTAL temperature coefficient of ±300 ppm/°C and a ratiometric temperature coefficient of ±20 ppm/°C. The latter governs voltage division accuracy and is the more relevant spec for potentiometer use cases. This means the ratio of RH–RW to RW–RL remains stable to within ±20 ppm per °C across -40°C to +85°C, ensuring consistent gain or attenuation in the X9315TM-2.7.

Is the X9315TM-2.7 pin-compatible with other X9315 variants?

Yes, the X9315TM-2.7 shares identical 8-lead MSOP pinout and electrical interface with all X9315 family members, including X9315WMZ-2.7 and X9315UMZ-2.7. Differences are limited to RTOTAL (100kΩ), temperature grade (0°C to +70°C), and marking code (DDP). No PCB layout change is needed when substituting within the same package type, preserving design reuse for the X9315TM-2.7.