Renesas X9C104SIT2

Overview

X9C104SIT2 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 wiper tap points, nonvolatile memory for power-up recall, and three-wire serial interface (CS/U/D/INC). It provides 100 kΩ end-to-end resistance with ±20% tolerance, ±5 V terminal voltage range, and operates at 5 V supply. It serves as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits.

For engineers reviewing the X9C104SIT2 datasheet, X9C104SIT2 pinout, X9C104SIT2 application, or X9C104SIT2 equivalent, this device supports stable wiper positioning across power cycles, low-power standby operation (750 µA max), and make-before-break switching - critical for voltage divider stability, sensor calibration, and programmable gain control in industrial and embedded systems.

Technical Context

The X9C104SIT2 integrates a 7-bit up/down counter, nonvolatile EEPROM storage, and a 99-resistor ladder with electronic wiper switches. Wiper position is updated on negative-edge transitions of INC while CS is active, with direction controlled by U/D logic level.

It uses an internal charge pump to support ±5 V analog signals across VH/RH and VL/RL terminals while operating from a single 5 V supply. The wiper series resistance is typically 40 Ω, and absolute linearity is ±1 MI (±1% of RTOTAL), with ratiometric temperature coefficient of ±20 ppm/°C.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (M8.15E footprint), RoHS-compliant, narrow-body plastic package with 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5174BRMZ-100 and MCP41HV51-104, the X9C104SIT2 uniquely combines bipolar ±5 V analog operation, nonvolatile recall, and minimal GPIO interface - making it optimal for cost-sensitive, self-contained analog trimming where firmware overhead and external components must be minimized.

Availability

X9C104SIT2 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, audio level control, and laser diode biasing requiring stable component supply and long-term parameter retention.

Supply support for X9C104SIT2 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 SoC solutions for industrial, automotive, and infrastructure markets.

The X9C104SIT2 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in analog signal conditioning, calibration, and programmable bias applications where reliability and nonvolatile setting retention are essential.

FAQ

What is the maximum allowable voltage across VH/RH and VL/RL for X9C104SIT2?

The X9C104SIT2 specifies a maximum differential voltage ΔV = |VH/RH − VL/RL| of 10 V. This limit applies regardless of individual terminal voltages, which may each swing from −5 V to +5 V relative to VSS. Exceeding 10 V risks irreversible damage to the internal resistor array or wiper switches. Always ensure the voltage difference remains within this bound during operation and transient conditions.

Does X9C104SIT2 retain its wiper position after power cycling?

Yes, the X9C104SIT2 retains its wiper position after power cycling because it stores the last valid wiper setting in nonvolatile EEPROM memory. Upon power-up, once VCC reaches its final value, the device automatically recalls the stored position and configures the wiper accordingly - eliminating the need for host initialization or calibration at startup.

Can X9C104SIT2 be used with a 3.3 V microcontroller interface?

Yes, the X9C104SIT2's CS, U/D, and INC inputs accept TTL/CMOS logic levels with V_IL ≤ 0.8 V and V_IH ≥ 2.0 V, fully compatible with 3.3 V GPIOs. However, VCC must remain at 5 V ±10% to ensure proper internal charge pump operation and ±5 V analog signal handling - do not tie VCC to 3.3 V.

What is the wiper resistance specification for X9C104SIT2 and how does it affect circuit accuracy?

The X9C104SIT2 has a typical wiper resistance of 40 Ω, with a maximum of 100 Ω. In voltage divider configurations, this series resistance introduces a small offset error proportional to load current. For example, with 1 mA through the wiper, the error is ≤100 mV - acceptable in most trimming applications but must be accounted for in ultra-precision designs using high-impedance buffers.

Is X9C104SIT2 RoHS-compliant and what package options are offered?

Yes, the X9C104SIT2 is RoHS-compliant and supplied in an 8-lead SOIC package (M8.15E footprint). The "T2" suffix denotes tape-and-reel packaging per TB347 specifications. No PDIP variant carries the "T2" suffix in the ordering table - only SOIC variants (e.g., X9C104SZ, X9C104SIZ) support tape-and-reel; the "I" denotes industrial temperature grade (−40°C to +85°C).