Renesas X9315TM

Overview

X9315TM 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 functions as a solid-state replacement for mechanical potentiometers in precision analog trimming applications requiring power-up recall, low noise (–120 dBV), and ±20% end-to-end resistance tolerance. Designed for use in voltage dividers or two-terminal variable resistors, it supports VCC = 5 V ±10% and RTOTAL = 100 kΩ.

For engineers reviewing the X9315TM datasheet, X9315TM pinout, X9315TM application, or X9315TM equivalent, key selection criteria include its 100 kΩ total resistance, MSOP-8 RoHS-compliant package, nonvolatile memory retention (100 years), 5 µA standby current, and compatibility with 0°C to +70°C commercial temperature operation.

Technical Context

The X9315TM uses a 5-bit up/down counter driving a decoder that selects one of 32 wiper positions across a linear 31-resistor array. Wiper movement is controlled by edge-triggered INC input with direction set by U/D logic level, and CS enables selection or initiates nonvolatile store on CS↑ while INC = HIGH.

Its architecture provides make-before-break switching during wiper transitions, temperature-compensated resistance (±300 ppm/°C), ratiometric stability (±20 ppm/°C), and wiper resistance of 200 Ω (typ.) at VCC = 5 V. The device operates without power sequencing constraints as long as VCC ≥ VH, VL, VW.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), JEDEC MO-187AA, body dimensions 3.0 mm × 3.0 mm × 0.85 mm (M8.118).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ100 and MCP45HV51-104E/MS, the X9315TM offers simpler 3-wire control, guaranteed power-up recall without firmware intervention, and lower standby current-making it optimal for cost-sensitive, single-pot, low-power embedded trimming where deterministic initialization is critical.

Availability

X9315TM is available at Aetrix Electronics and suitable for audio equipment calibration, laser diode bias circuits, power supply voltage trim, and sensor offset nulling requiring stable component supply and long-term parametric consistency.

Supply support for X9315TM 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 X9315TM belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically to replace electromechanical trimpots in automated calibration, programmable gain/offset, and adaptive analog signal conditioning systems.

FAQ

What is the total resistance value and tolerance of the X9315TM?

The X9315TM has a nominal end-to-end resistance (RTOTAL) of 100 kΩ with a tolerance of ±20%, measured across RH/VH and RL/VL terminals. This value is fixed per device variant and applies across the full commercial temperature range (0°C to +70°C). The tolerance reflects initial manufacturing variation and is not affected by wiper position.

Does the X9315TM retain its wiper position after power cycling?

Yes, the X9315TM stores the current wiper position in nonvolatile memory upon command (CS↑ while INC = HIGH), and automatically recalls that value at next power-up. Data retention is rated for 100 years under normal conditions, ensuring consistent startup behavior without host MCU intervention.

What package type and footprint does the X9315TM use?

The X9315TM is supplied in an 8-lead MSOP (Mini Small Outline Plastic) package, Pb-free and RoHS compliant, with JEDEC MO-187AA outline (drawing M8.118). Its compact 3.0 mm × 3.0 mm body and 0.65 mm lead pitch support high-density PCB layouts typical in portable and telecom equipment.

Can the X9315TM operate from a 3.3 V supply?

No-the X9315TM is specified only for VCC = 5 V ±10% (4.5 V to 5.5 V). For 3.3 V operation, consider the X9315TMZ-2.7 variant, which supports 2.7 V to 5.5 V and shares identical 100 kΩ resistance and MSOP-8 packaging but uses different internal voltage references and timing parameters.

How is the wiper position controlled on the X9315TM?

The X9315TM uses a 3-wire asynchronous interface: CS (active-low chip select), U/D (direction control), and INC (negative-edge-triggered increment clock). With CS LOW, each falling edge on INC moves the wiper one step up or down depending on the U/D logic level; no microcontroller firmware stack or protocol parsing is required.