Renesas X9315USZ-2.7T1

Overview

X9315USZ-2.7T1 from Intersil is a low-noise, low-power, 32-tap digitally controlled potentiometer (XDCP™) implemented with 31 resistive elements and nonvolatile memory. It operates from 2.7V to 5.5V, offers ±20% end-to-end resistance tolerance, stores wiper position on power-down, and functions as either a three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning circuits.

For engineers reviewing the X9315USZ-2.7T1 datasheet, X9315USZ-2.7T1 pinout, X9315USZ-2.7T1 application, or X9315USZ-2.7T1 equivalent, this device supports precise digital trimming of bias voltages, gain-setting networks, and offset calibration in battery-powered instrumentation where supply headroom is constrained to 2.7V and long-term setting retention is required.

Technical Context

The X9315USZ-2.7T1 uses a 5-bit up/down counter driving a 32-position decoder to select taps across a monolithic resistor array. Wiper movement is controlled via asynchronous 3-wire interface (CS, U/D, INC), with make-before-break switching ensuring continuity during transitions.

Its nonvolatile memory retains wiper position for ≥100 years and withstands ≥100,000 store cycles. The device features temperature-compensated resistance (±300 ppm/°C RTOTAL drift), ratiometric tracking (±20 ppm/°C), and wiper resistance of 400–1000 Ω at 2.7V - optimized for low-voltage analog front-ends.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), JEDEC MS-012-AA footprint (M8.15), body size 4.90 mm × 3.90 mm × 1.75 mm max.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-10 and MCP45HV51-103E/MS, the X9315USZ-2.7T1 uniquely combines 3-wire simplicity, guaranteed nonvolatile recall at 2.7 V, and proven 100-year data retention - making it optimal for cost-sensitive, low-pin-count designs requiring zero-host-initialization startup.

Availability

X9315USZ-2.7T1 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable audio systems, and industrial sensor signal conditioning requiring stable component supply with RoHS-compliant packaging and commercial temperature range support.

Supply support for X9315USZ-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 replacement for mechanical potentiometers in trimming, calibration, and analog control applications - emphasizing reliability, nonvolatile setting retention, and low-voltage operability.

FAQ

What is the guaranteed supply voltage range for reliable operation of the X9315USZ-2.7T1?

The X9315USZ-2.7T1 is specified for continuous operation from 2.7 V to 5.5 V. Within this range, all electrical parameters-including active current (80 µA max), wiper resistance (400–1000 Ω), and timing (4 µs INC cycle)-are guaranteed across the 0°C to +70°C commercial temperature range. Operation below 2.7 V may result in undefined behavior or failure to store wiper positions.

Does the X9315USZ-2.7T1 retain its wiper setting after power removal?

Yes. The X9315USZ-2.7T1 stores the current wiper position in nonvolatile EEPROM memory whenever CS transitions HIGH while INC is HIGH. That stored value is automatically recalled on subsequent power-up, ensuring repeatable startup conditions without host MCU involvement. Data retention is rated for ≥100 years at +25°C.

Can the X9315USZ-2.7T1 be used as a two-terminal variable resistor?

Yes. The X9315USZ-2.7T1 supports two-terminal operation by connecting either RH/VH or RL/VL to VW/RW and using the remaining fixed terminal with the wiper. In this configuration, it functions as a digitally adjustable rheostat with 32 discrete resistance values ranging from near-zero to 10 kΩ ±20%, maintaining the same 2.7–5.5 V supply compatibility and nonvolatile storage.

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals?

The absolute maximum voltage difference ΔV = |VH – VL| is limited to 5 V per the datasheet. This constraint applies regardless of VCC level and ensures safe operation of the internal resistor array and switching transistors. Exceeding 5 V risks permanent damage, even if VCC remains within 2.7–5.5 V.

How does the X9315USZ-2.7T1 handle rapid wiper position changes?

The X9315USZ-2.7T1 uses make-before-break switching during wiper transitions, temporarily connecting multiple taps to VW/RW for tIW (1–5 µs). If several positions are traversed rapidly, RTOTAL may drop significantly due to parallel conduction paths. For stable analog performance, limit sequential INC edges to ≤250 kHz and allow ≥5 µs settling after final position is reached.