Renesas X9C303S8Z

Overview

X9C303S8Z from Intersil is a logarithmic digitally controlled potentiometer (XDCP™) with 100 tap positions, 32kΩ end-to-end resistance (±15%), ±5V terminal voltage rating, and nonvolatile wiper position storage. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal trimming, audio volume control, and sensor calibration circuits.

For engineers reviewing the X9C303S8Z datasheet, X9C303S8Z pinout, X9C303S8Z application, or X9C303S8Z equivalent, this device offers log-taper precision, 750µA standby current, make-before-break switching, and RoHS-compliant 8-lead SOIC packaging for industrial-grade analog adjustment without mechanical wear.

Technical Context

The X9C303S8Z implements a 7-bit up/down counter driving a 100-position decoder to select taps across a 99-element logarithmic resistor array. Wiper position is stored in nonvolatile EEPROM upon CS↑/INC↑ transition and recalled at power-up.

Its three-wire serial interface (CS, U/D, INC) enables deterministic wiper control with 100ns setup timing, 100µs INC-to-VW response, and ±1mA max wiper current. The device operates at 5V ±10% with active current ≤3mA and features temperature-compensated log taper (±20ppm/°C ratiometric TC at tap 84).

Key Specifications

Pinout & Package

Package: 8-lead SOIC (150 mil), Pb-free, RoHS-compliant (MDP0027 drawing). Operating temperature range: 0°C to +70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP41010-I/P, the X9C303S8Z uniquely delivers logarithmic taper, ±5V bipolar terminal capability, and autonomous nonvolatile recall-making it optimal for audio, sensor offset, and industrial analog trimming where mechanical reliability and power-loss resilience are mandatory.

Availability

X9C303S8Z is available at Aetrix Electronics and suitable for audio volume control, sensor signal conditioning, power supply feedback tuning, and industrial display brightness control requiring stable component supply and long-term calibration integrity.

Supply support for X9C303S8Z 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 with ISO9001-certified manufacturing.

The X9C303 product line delivers digitally programmable analog resistance with nonvolatile memory for applications demanding mechanical-replacement reliability, log-taper precision, and robust bipolar signal handling.

FAQ

What is the operating voltage range for the X9C303S8Z?

The X9C303S8Z operates with a VCC supply of 5V ±10% (4.5V to 5.5V). Its VH and VL terminals support independent voltages from –5V to +5V relative to VSS, enabling true bipolar analog signal handling without level-shifting circuitry. This makes the X9C303S8Z suitable for applications involving AC-coupled signals or dual-supply op-amp configurations where terminal voltage swing exceeds the supply rail.

Does the X9C303S8Z retain its wiper setting after power loss?

Yes, the X9C303S8Z stores the wiper position in nonvolatile EEPROM memory. When CS is raised while INC is HIGH, the current counter value is written to memory and retained for up to 100 years at +55°C. Upon subsequent power-up, the device automatically recalls this stored value and positions the wiper accordingly-ensuring repeatable startup behavior without host intervention. This feature is intrinsic to the X9C303S8Z design and requires no external components.

How does the logarithmic taper of the X9C303S8Z differ from linear potentiometers?

The X9C303S8Z uses a 99-element resistor array configured for logarithmic (audio) taper, where resistance change per tap approximates a constant dB increment-±0.115dB step error across 100 positions. This matches human auditory and visual perception curves, unlike linear pots where resistance changes uniformly. As a result, the X9C303S8Z delivers smooth, perceptually uniform adjustments in volume or brightness control, avoiding coarse jumps at low settings that occur with linear devices.

Can the X9C303S8Z be used in place of a mechanical potentiometer?

Yes, the X9C303S8Z functions as a direct solid-state replacement for 32kΩ mechanical potentiometers in three-terminal (VH–VW–VL) or two-terminal (VW–VL or VW–VH) configurations. Its make-before-break switching prevents signal interruption during adjustment, and its 100,000-cycle endurance far exceeds typical mechanical pot life. Unlike mechanical units, the X9C303S8Z eliminates wear, contamination sensitivity, and position drift-making it ideal for sealed or high-vibration environments where the X9C303S8Z's reliability is critical.

What package type and footprint does the X9C303S8Z use?

The X9C303S8Z uses an 8-lead SOIC package (150 mil width, MDP0027 drawing) with Pb-free, RoHS-compliant terminations. Its pinout matches industry-standard SOIC-8 footprints, including compatibility with legacy designs using X9C303S8 or X9C303P variants. The package supports standard reflow soldering profiles and is rated for 0°C to +70°C operation-ensuring drop-in manufacturability and thermal stability in commercial-grade electronics where the X9C303S8Z is deployed.