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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Digital Potentiometers

Renesas X9251TV24

Name: X9251TV24
Brand: Renesas
SKU: X9251TV24
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: X9251TV24

Manufacturer:: Renesas

Category:: Digital Potentiometers

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: X9251TV24.pdf

Description:: IC DGT POT 100KOHM 256TP 24TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

X9251TV24 from Renesas Electronics is a quad digitally controlled potentiometer (XDCP™) IC integrating four independent 256-tap, 50kΩ end-to-end resistance DCPs on a single CMOS die. It operates from 2.7V to 5.5V, features SPI interface control, nonvolatile data register storage (100-year retention), and <5µA standby current. It serves as programmable voltage dividers or variable resistors in precision analog signal conditioning circuits.

For engineers reviewing the X9251TV24 datasheet, X9251TV24 pinout, X9251TV24 application, or X9251TV24 equivalent, this page delivers verified technical context, real-world use cases for gain/voltage trimming, confirmed pin functions per TSSOP-24 layout, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The X9251TV24 implements four independent digital potentiometers using resistor arrays and CMOS switches, each with an 8-bit volatile Wiper Counter Register (WCR) and four 8-bit nonvolatile Data Registers (DR0–DR3). Wiper position is updated via SPI write, transfer, or increment/decrement commands - all supporting global or per-DCP operation.

Its SPI interface complies with standard mode-0 timing (CPOL=0, CPHA=0), supports device addressing via A0/A1 pins, includes hardware write protection (WP), and uses HOLD to pause ongoing transfers without resetting the sequence. Power-up loads DR#0 values into corresponding WCRs, enabling deterministic startup behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
DCP Count	Four independent digitally controlled potentiometers on one die
Resolution	256 taps (8-bit), enabling 0.4% step resolution across full scale
Total Resistance	50kΩ ±20% per DCP - sets max adjustable range and load impedance
V_CC Range	2.7V to 5.5V - supports single-supply operation across industrial and commercial rails
Standby Current	<5µA max - enables low-power system sleep modes without losing configuration
Data Retention	100 years - ensures long-term calibration stability without refresh
Endurance	100,000 write cycles per bit - supports repeated field calibration over product lifetime
Wiper Resistance	220Ω typical at V_CC = 5V - impacts insertion loss and linearity in voltage divider configurations

Pinout & Package

Package: 24-lead TSSOP (4.4mm body width), RoHS-compliant, Pb-free, moisture sensitivity level per M24.173 drawing.

Pin/Terminal	Circuit Role	Design Meaning
SO	SPI serial output	Three-state data output; driven on falling SCK edge during read operations
A0, A1	Device address inputs	Set LSBs of slave address; must be hard-wired to V_SS or V_CC for SPI bus arbitration
RW0–RW3	Wiper terminals	Equivalent to mechanical wiper; voltage output point for each DCP's adjustable tap
RH0–RH3	High-side terminals	Fixed positive end of each potentiometer; connects to V_CC or reference voltage
RL0–RL3	Low-side terminals	Fixed negative end of each potentiometer; connects to ground or signal return
CS	Chip select	Active-low enable; must transition HIGH→LOW before any SPI command sequence
WP	Hardware write protect	Active-low lock preventing nonvolatile writes to Data Registers during operation
SI	SPI serial input	Latches data on rising SCK edge; accepts opcodes, addresses, and register values
SCK	SPI clock	Drives synchronous communication; max 2MHz frequency per AC specs
HOLD	SPI pause control	Halts active transfer without resetting state; requires SCK LOW before assertion
V_CC, V_SS	Power supply	Single 2.7–5.5V rail; V_CC must always ≥ voltages on RH/RL/RW pins
NC (Pins 6, 19)	No connect	Internally unused; must remain floating per Renesas manufacturing specification

Key Features

Feature	Design Value
Quad DCP integration	Reduces board space and BOM count vs. four discrete pots; enables synchronized parameter tuning
Nonvolatile DR storage	Preserves up to four distinct wiper settings per DCP across power cycles - critical for factory calibration
SPI Increment/Decrement mode	Enables real-time fine-tuning of wiper position via clocked SI HIGH/LOW pulses - no register address overhead
Hardware write protection	Prevents accidental overwrites of calibrated DR values during system runtime via dedicated WP pin
Low-power standby	Draws <5µA when CS HIGH - allows host MCU to idle while retaining DCP configuration state
100-year data retention	Eliminates need for battery-backed RAM or external EEPROM in long-lifecycle industrial equipment

Applications

Audio Volume Control	Voltage Regulator Feedback Trimming
Use Scenario: Adjusting gain in headphone amplifier stages or line-out circuits. IC Role / Device Role / Timing Role: Acts as two-terminal variable resistor between amplifier output and feedback network. Use Value: Enables software-controlled volume without mechanical wear, pop/click suppression via SPI slew rate control, and recall of user presets from nonvolatile registers.	Use Scenario: Setting precise output voltage of adjustable DC-DC converters or LDOs. IC Role / Device Role / Timing Role: Replaces fixed resistor in feedback divider to dynamically adjust regulation setpoint. Use Value: Supports remote calibration, adaptive output scaling, and factory-trimmed accuracy (±0.4% step resolution improves V_OUT tolerance).
Sensor Signal Conditioning	RF Power Amplifier Bias Control
Use Scenario: Zero/gain compensation in bridge-based pressure or temperature sensor front-ends. IC Role / Device Role / Timing Role: Configures offset nulling and span adjustment in instrumentation amplifier feedback paths. Use Value: Allows one-time calibration at production and field recalibration without hardware change; 50kΩ resistance matches typical sensor bridge impedances.	Use Scenario: Setting quiescent bias current in GaAs or SiGe RF power amplifiers. IC Role / Device Role / Timing Role: Provides stable, low-noise DC bias voltage via three-terminal potentiometer configuration. Use Value: Reduces thermal drift impact via ratiometric tempco (±20ppm/°C), and avoids manual trimmer replacement in sealed RF modules.

Audio Volume Control

Voltage Regulator Feedback Trimming

Use Scenario: Adjusting gain in headphone amplifier stages or line-out circuits.

IC Role / Device Role / Timing Role: Acts as two-terminal variable resistor between amplifier output and feedback network.

Use Value: Enables software-controlled volume without mechanical wear, pop/click suppression via SPI slew rate control, and recall of user presets from nonvolatile registers.

Use Scenario: Setting precise output voltage of adjustable DC-DC converters or LDOs.

IC Role / Device Role / Timing Role: Replaces fixed resistor in feedback divider to dynamically adjust regulation setpoint.

Use Value: Supports remote calibration, adaptive output scaling, and factory-trimmed accuracy (±0.4% step resolution improves V_OUT tolerance).

Sensor Signal Conditioning

RF Power Amplifier Bias Control

Use Scenario: Zero/gain compensation in bridge-based pressure or temperature sensor front-ends.

IC Role / Device Role / Timing Role: Configures offset nulling and span adjustment in instrumentation amplifier feedback paths.

Use Value: Allows one-time calibration at production and field recalibration without hardware change; 50kΩ resistance matches typical sensor bridge impedances.

Use Scenario: Setting quiescent bias current in GaAs or SiGe RF power amplifiers.

IC Role / Device Role / Timing Role: Provides stable, low-noise DC bias voltage via three-terminal potentiometer configuration.

Use Value: Reduces thermal drift impact via ratiometric tempco (±20ppm/°C), and avoids manual trimmer replacement in sealed RF modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD5204BRUZ10	Quad 10kΩ DCP, I²C interface, 128-tap resolution, no hardware WP pin	Lower resistance range suits current-sensing bias networks; lacks HOLD and global transfer instructions	Choose for I²C systems requiring lower R_TOTAL and simpler control; avoid where SPI hold/pause or nonvolatile multi-setting retention is required.
MCP42050-I/P	Dual 50kΩ DCP, SPI interface, 256-tap, but only two pots per package and no global XFR support	Requires two devices for quad functionality; lacks A0/A1 addressing and hardware write protection	Use when board space allows dual placement and application needs only two independently adjustable channels; not suitable for space-constrained quad-channel designs.

Compared with X9251TV24, AD5204BRUZ10 offers I²C simplicity but sacrifices resolution, write protection, and SPI flexibility; MCP42050-I/P provides matching 50kΩ/256-tap specs but forces duplication for quad-channel use and omits critical system-level features like HOLD and per-device addressing.

Availability

X9251TV24 is available at Aetrix Electronics and suitable for audio volume control, voltage regulator feedback trimming, sensor signal conditioning, and RF power amplifier bias control requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9251TV24 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 mixed-signal solutions for automotive, industrial, and IoT applications.

The X9251TV24 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in precision analog systems requiring programmable, nonvolatile, and low-power resistance adjustment.

FAQ

What is the operating voltage range for the X9251TV24?

The X9251TV24 operates from 2.7V to 5.5V on a single supply. This range is explicitly specified in the datasheet's Recommended Operating Conditions table and supports compatibility with both 3.3V and 5V logic systems. Operation outside this range may cause undefined behavior or damage, and V_CC must always be ≥ voltages applied to RH, RL, or RW pins per power-up guidelines.

How many wiper positions does each potentiometer in the X9251TV24 support?

Each of the four potentiometers in the X9251TV24 supports 256 discrete wiper positions, implemented via an 8-bit Wiper Counter Register (WCR). This yields 0.4% resolution per step and is confirmed in the Features section and Table 1 (WCR definition) of the FN8166 datasheet.

Does the X9251TV24 retain its settings after power cycling?

Yes - the X9251TV24 retains wiper settings across power cycles by loading DR#0 values into each WCR at power-up. Its four nonvolatile Data Registers provide 100-year data retention and withstand 100,000 write cycles, enabling reliable factory calibration and field updates without external memory.

Can the X9251TV24 be used as a two-terminal variable resistor?

Yes - the X9251TV24 supports both three-terminal potentiometer (RH–RW–RL) and two-terminal variable resistor (RW–RH or RW–RL) configurations. The datasheet explicitly states this capability in the first paragraph of the Functional Description and shows both topologies in Application Circuits on Page 17.

What is the maximum SPI clock frequency supported by the X9251TV24?

The X9251TV24 supports a maximum SPI clock frequency of 2MHz, as specified in the AC Timing table (f_SCK parameter) on Page 14 of FN8166 Rev 7.00. Timing margins (t_WH, t_WL, t_SU) are guaranteed down to 500ns cycle time, confirming reliable operation at this rate under recommended conditions.

X9251TV24 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: XDCP™

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Taper:: Linear

Configuration:: Potentiometer

Number of Circuits:: 4

Number of Taps:: 256

Resistance (Ohms):: 100k

Interface:: SPI

Memory Type:: Non-Volatile

Voltage - Supply:: 5V

Features:: Selectable Address

Tolerance:: ±20%

Temperature Coefficient (Typ):: ±300ppm/°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 24-TSSOP

Operating Temperature:: 0°C ~ 70°C

Resistance - Wiper (Ohms) (Typ):: 220 (Max)

X9251TV24 FAQ

1.How can I place an order for X9251TV24 through Aetrix?

Please submit a Request for Quotation (RFQ) for X9251TV24 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for X9251TV24 reliable?

The price and inventory of X9251TV24 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9251TV24 is usually 5 days.

3.What payment methods are accepted for X9251TV24?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9251TV24 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for X9251TV24?

X9251TV24 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your X9251TV24 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for X9251TV24?

For technical support, including X9251TV24 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9251TV24 requirements.

6.How does Aetrix verify that X9251TV24 is sourced from the original manufacturer or authorized distributors?

All X9251TV24 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that X9251TV24 meets industry standards.

7.What is the process for return or replacement of X9251TV24?

All X9251TV24 units undergo pre-shipment inspection (PSI). If there is an issue with X9251TV24, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The X9251TV24 part is unused and in its original packaging.

Return procedure for X9251TV24:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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