Renesas X9C102PI

Overview

X9C102PI from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 1 kΩ end-to-end resistance, 100 wiper tap points, nonvolatile wiper position storage, ±5 V terminal voltage rating, and 8-lead PDIP package. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning, power supply trimming, and system calibration circuits.

For engineers reviewing the X9C102PI datasheet, X9C102PI pinout, X9C102PI application, or X9C102PI equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin roles, confirmed alternatives for industrial temperature-range digital potentiometer replacement, and supply support for long-lifecycle embedded systems.

Technical Context

The X9C102PI 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 wiper positions, with wiper position stored in nonvolatile memory upon CS↑ while INC = HIGH.

It operates at 5 V ±10%, supports -40°C to +85°C industrial temperature range, features ±600 ppm/°C end-to-end resistance temperature coefficient, and delivers 40 Ω typical wiper resistance with ±1 MI absolute linearity error across its full range.

Key Specifications

Pinout & Package

Package: 8-lead plastic dual-in-line package (PDIP), RoHS-compliant, MDP0031 outline, through-hole mounting, 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 X9C102PI, AD5171BRMZ-10 trades self-contained nonvolatility for I²C compatibility and lower supply sensitivity, while MCP41HV51-103E/P offers wider voltage operation and finer resolution but demands continuous host supervision - making X9C102PI optimal for autonomous, low-pin-count, industrial-grade trim applications.

Availability

X9C102PI is available at Aetrix Electronics and suitable for industrial temperature-range analog trimming, sensor calibration, and programmable power supply applications requiring stable component supply across multi-year production lifecycles.

Supply support for X9C102PI 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 manufacturer delivering microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and infrastructure markets.

The X9C102PI belongs to Renesas' XDCP™ digitally controlled potentiometer family, designed specifically for replacing mechanical trimmers in harsh-environment analog systems where reliability, nonvolatile setting retention, and simple digital control are critical.

FAQ

What is the operating temperature range of the X9C102PI?

The X9C102PI is rated for industrial operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table on page 2 of FN8222 Rev 4.00, where X9C102PIZ is explicitly listed with "-40 to +85°C" under TEMP RANGE. The device maintains full electrical performance-including ±20% end-to-end resistance tolerance and ±1 MI linearity-across this entire range.

Does the X9C102PI retain its wiper position after power loss?

Yes, the X9C102PI stores the wiper position in nonvolatile memory and automatically recalls it on power-up. As stated on page 1 of FN8222, "The position of the wiper can be stored in non-volatile memory and then be recalled upon a subsequent power-up operation." Data retention is specified at 100 years, and recall occurs once VCC reaches its final value, per the Power-up and Down Requirements section on page 5.

What is the maximum voltage allowed across the VH/RH and VL/RL terminals of the X9C102PI?

The maximum differential voltage |VH/RH − VL/RL| for the X9C102PI is 4 V, as specified in the Absolute Maximum Ratings table on page 4 of FN8222. This is distinct from the ±5 V absolute terminal voltage rating (relative to VSS); exceeding 4 V across the end terminals risks damage to the internal resistor array or switching network.

Can the X9C102PI be used with a 3.3 V microcontroller interface?

Yes, the X9C102PI's digital inputs (CS, U/D, INC) accept VIH ≥ 2 V and VIL ≤ 0.8 V, fully compatible with standard 3.3 V CMOS logic levels. Page 4 of FN8222 lists VIH = 2 V min and VIL = 0.8 V max under DC Operating Characteristics. However, VCC must remain at 5 V ±10% to power the internal charge pump and ensure ±5 V analog terminal operation.

Is the X9C102PI pin-compatible with other members of the X9C family such as X9C103PI?

No - while X9C102PI shares identical pinout and package (8-lead PDIP) with X9C103PI, X9C104PI, and X9C503PI, their end-to-end resistances differ (1 kΩ vs. 10 kΩ vs. 100 kΩ vs. 50 kΩ). Substituting them alters gain, current, or time constants in the circuit; thus, they are functionally interchangeable only if the design tolerates the specific RTOTAL value and associated power dissipation (e.g., X9C102PI's 16 mW max vs. X9C103PI's 10 mW).