Renesas X9C104P

Overview

X9C104P from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100-kΩ end-to-end resistance, 100 wiper tap points, nonvolatile wiper position storage, ±5V terminal voltage rating, and 3mA max active supply current. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in precision analog trimming applications requiring power-cycle retention.

For engineers reviewing the X9C104P datasheet, X9C104P pinout, X9C104P application, or X9C104P equivalent, this device supports stable analog parameter adjustment in industrial control loops, sensor calibration circuits, and programmable gain stages where mechanical potentiometer wear, drift, or manual access are unacceptable.

Technical Context

The X9C104P implements a 99-element resistor array with make-before-break wiper switching, controlled via a negative-edge-triggered three-wire interface (CS, U/D, INC). Its 7-bit up/down counter drives a decoder selecting one of 100 discrete tap positions, with wiper resistance typically 40 Ω.

Nonvolatile memory stores the last wiper position at power-down and recalls it on VCC ramp-up (tPU ≤ 500 µs), while internal charge pump enables ±5V analog signal handling with single 5V supply. Absolute linearity is ±1 MI (±1% of RTOTAL), and ratiometric temperature coefficient is ±20 ppm/°C.

Key Specifications

Pinout & Package

Package: 8-lead PDIP (MDP0031), RoHS-compliant, through-hole wave-solder compatible only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9C104P, AD5204BRZ10 offers greater channel density and resolution but lacks direct 100-kΩ match and requires board-level SPI integration, while MCP41010-I/P provides finer granularity but mandates software-managed nonvolatile storage-neither replicates the X9C104P's self-contained 100-kΩ, 100-tap, auto-recall functionality in a PDIP package.

Availability

X9C104P is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, laser diode bias control, and audio tone stack trimming requiring stable component supply with long-term lifecycle support.

Supply support for X9C104P 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

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and infrastructure markets.

The X9C104P belongs to Renesas' XDCP™ digitally controlled potentiometer family, designed specifically for replacing mechanical trimmers in analog signal-path applications demanding reliability, programmability, and nonvolatile setting retention.

FAQ

What is the maximum allowable voltage across the VH/RH and VL/RL terminals for the X9C104P?

The X9C104P specifies a maximum ΔV = |VH/RH − VL/RL| of 10 V. This means the absolute voltage difference between its high-side and low-side fixed terminals must not exceed 10 V under any operating condition. Exceeding this limit risks permanent damage to the internal resistor array or switching elements, as confirmed in the Absolute Maximum Ratings table on page 4 of FN8222 Rev 4.00.

Does the X9C104P retain its wiper position after power removal, and how is that achieved?

Yes, the X9C104P retains its wiper position after power removal using on-chip nonvolatile memory. When CS transitions HIGH while INC is also HIGH, the current 7-bit counter value is written to EEPROM-like memory. Upon subsequent power-up, once VCC reaches its final value, the stored value is automatically recalled and applied to the wiper decoder-ensuring the X9C104P resumes operation at the last saved position without host intervention.

Can the X9C104P operate with analog signals outside the 0–5 V range?

Yes, the X9C104P supports analog terminal voltages from −5 V to +5 V on both VH/RH and VL/RL pins, enabling true bipolar operation. Its internal charge pump generates necessary bias for this extended range while accepting only a single 5 V supply on VCC. However, the voltage difference between VH/RH and VL/RL must remain ≤10 V, and all analog signals must stay within the specified −5 V to +5 V bounds relative to VSS.

What is the wiper resistance specification for the X9C104P, and why does it matter in circuit design?

The X9C104P has a typical wiper resistance (RW) of 40 Ω, with a maximum of 100 Ω per Electrical Specifications table (page 4). This series resistance directly impacts accuracy in low-impedance voltage divider or current-sensing applications-especially when the load impedance is comparable to RW. Designers must include RW in gain error calculations and verify that wiper current remains within ±4.4 mA limits to avoid nonlinearities or heating effects.

Is the X9C104P pin-compatible with other members of the X9Cxxx family, such as X9C103P or X9C503P?

Yes, the X9C104P shares identical pinout, package (8-lead PDIP or SOIC), and interface timing with X9C102P, X9C103P, and X9C503P. The only functional differences are end-to-end resistance values (1kΩ, 10kΩ, 100kΩ, 50kΩ respectively) and corresponding power ratings. This allows direct substitution in existing layouts when resistance value and power dissipation requirements align-verified across Ordering Information and Pin Descriptions sections of FN8222 Rev 4.00.