Renesas X9315TMZ

Overview

X9315TMZ from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap points, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates at 5V ±10%, delivers 100kΩ end-to-end resistance, supports 0°C to +70°C operation, and functions as a three-terminal voltage divider or two-terminal variable resistor in analog signal conditioning circuits.

For engineers reviewing the X9315TMZ datasheet, X9315TMZ pinout, X9315TMZ application, or X9315TMZ equivalent, this page provides verified technical context, pin-level design meaning, real-world use cases in precision trimming and parameter adjustment, and validated alternative options for industrial control and sensor calibration systems.

Technical Context

The X9315TMZ 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↑ with INC HIGH and recalled automatically at power-up.

Its solid-state architecture eliminates mechanical wear, supports make-before-break switching during tap transitions, and maintains wiper position stability with ±20% RTOTAL tolerance, ±300 ppm/°C total resistance TC, and ratiometric TC of ±20 ppm/°C - critical for voltage-divider accuracy over temperature.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free), JEDEC MO-187AA compliant, 3.0mm × 3.0mm footprint, 0.65mm pitch.

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 X9315TMZ uniquely combines 100kΩ resistance, 32-tap simplicity, and guaranteed power-on wiper recall - making it optimal for single-pot, 5V, self-initializing analog trim applications without firmware overhead.

Availability

X9315TMZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifier trim, laser diode bias control, and audio tone stack adjustment requiring stable component supply and long-term parametric consistency.

Supply support for X9315TMZ 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 X9315 product line delivers solid-state digital potentiometers optimized for analog signal conditioning in environments demanding reliability, nonvolatile setting retention, and compatibility with legacy 5V systems.

FAQ

What is the maximum wiper current rating for the X9315TMZ?

The X9315TMZ has a maximum wiper current rating of ±3.75mA under recommended operating conditions. This limit ensures safe operation within the 10mW maximum power rating and prevents thermal drift or resistor element damage. Exceeding this current may degrade linearity or shorten endurance life. The X9315TMZ wiper resistance is typically 200Ω at 5V, supporting direct connection to op-amp inputs without additional buffering.

Does the X9315TMZ retain its wiper position after power cycling?

Yes, the X9315TMZ retains its wiper position after power cycling. It stores the last wiper setting in nonvolatile EEPROM memory, which provides 100-year data retention. Upon power-up, the device automatically recalls the stored value and positions the wiper accordingly. This behavior is intrinsic to the X9315TMZ architecture and requires no external circuitry or host MCU intervention.

Can the X9315TMZ operate from a 3.3V supply?

No, the X9315TMZ is specified only for 5V ±10% operation (4.5V to 5.5V). It is not rated for 3.3V supply - doing so may result in unreliable wiper movement, incomplete EEPROM writes, or failure to meet timing specifications. For 3.3V-compatible digital potentiometers, consider the X9315TMZ-2.7 variant or alternatives like the MCP41HV51.

What is the absolute linearity error specification for the X9315TMZ?

The X9315TMZ has an absolute linearity error of ±1 MI (Minimum Increment), where MI = RTOTAL/31 ≈ 3.226kΩ for the 100kΩ version. This means the actual wiper voltage deviates by no more than ±3.226kΩ × (VH–VL)/100kΩ from the ideal linear step. Measured across temperature, this translates to ±1% of full-scale output voltage - sufficient for precision trimming but not metrology-grade applications.

How is nonvolatile storage triggered on the X9315TMZ?

Nonvolatile storage on the X9315TMZ is triggered by a specific control sequence: while CS is LOW and the wiper is at the desired position, raise CS to HIGH while holding INC HIGH. This edge-triggered store command writes the current 5-bit counter value to EEPROM. The operation takes 5–10ms to complete, after which the device enters standby mode. No separate write-enable command or address is required - the action is implicit in the CS↑/INC HIGH transition.