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Renesas X9251US24IZ-2.7
- Part No.:
- X9251US24IZ-2.7
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X9251US24IZ-2.7.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,710
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Product details
Overview
X9251US24IZ-2.7 from Renesas Electronics is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution, SPI interface, 50kΩ end-to-end resistance, 2.7V–5.5V single-supply operation, and -40°C to +85°C industrial temperature range-used for precision gain control, DC bias trimming, and sensor signal conditioning in embedded analog systems.
For engineers reviewing the X9251US24IZ-2.7 datasheet, X9251US24IZ-2.7 pinout, X9251US24IZ-2.7 application, or X9251US24IZ-2.7 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options for analog programmability in low-voltage industrial designs.
Technical Context
The X9251US24IZ-2.7 integrates four independent CMOS-switched resistor arrays, each with an 8-bit volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers (DR0–DR3). Wiper position is updated via SPI write, transfer, or increment/decrement commands, with power-up auto-load from DR#0.
It implements true three-terminal potentiometer or two-terminal variable resistor behavior per channel, supports hardware write protection (WP), device addressing (A0/A1), and serial pause (HOLD). All operations comply with standard SPI timing at up to 2 MHz, with wiper response time ≤10 µs after instruction execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of DCPs | Four independent digitally controlled potentiometers on one die |
| Resolution | 256 taps (0.4% step resolution); enables precise analog adjustment without mechanical wear |
| End-to-End Resistance | 50 kΩ ±20%; defines maximum adjustable resistance range per channel |
| VCC Range | 2.7 V to 5.5 V; supports direct interfacing with 3.3 V and 5 V logic/system rails |
| Standby Current | <5 µA max; enables ultra-low-power operation during system sleep modes |
| Data Retention | 100 years; ensures long-term storage of calibration or configuration settings |
| Nonvolatile Endurance | 100,000 write cycles per register bit; suitable for field recalibration over product lifetime |
| Wiper Resistance | 300 Ω typical at 3 V, 220 Ω at 5 V; impacts voltage divider accuracy and loading effects |
Pinout & Package
24-lead TSSOP (4.4 mm wide), RoHS-compliant, Pb-free, moisture sensitivity level (MSL) compliant per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SO | Serial data output | SPI MISO; outputs read data on falling SCK edge; tri-state when CS high |
| A0, A1 | Device address inputs | Set two LSBs of slave address; must be tied to VSS or VCC for deterministic SPI selection |
| RW0–RW3 | Wiper terminals | Equivalent to mechanical potentiometer wiper; voltage output point for each DCP |
| RH0–RH3, RL0–RL3 | High/low terminals | Fixed resistor ends; define full-scale voltage/current range per potentiometer |
| CS | Chip select | Active-low enable; initiates SPI communication and powers internal circuitry |
| WP | Hardware write protect | Active-low; blocks nonvolatile writes to Data Registers when asserted |
| SI | Serial data input | SPI MOSI; accepts opcodes, addresses, and data on rising SCK edge |
| SCK | Serial clock | Drives SPI timing; max 2 MHz; controls data latching and shifting |
| HOLD | Serial bus pause | Pauses ongoing SPI transaction without resetting state; requires SCK low to assert |
| VCC, VSS | Supply and ground | Single 2.7–5.5 V rail; VCC must always ≥ all RH/RL/RW voltages |
| NC (pins 6, 19) | No connect | Unused; must remain floating per Renesas specification |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration | Reduces board space and BOM count vs. four discrete digital pots; simplifies routing and calibration |
| Nonvolatile Data Registers | Four 8-bit registers per DCP store wiper positions or system parameters; retain values across power cycles |
| SPI Increment/Decrement mode | Enables real-time fine-tuning of wiper position with minimal host CPU overhead and no register address overhead |
| Hardware write protection | Prevents accidental overwrites of calibrated settings during firmware updates or runtime operation |
| Low-power standby | Draws <5 µA when deselected (CS high), enabling energy-efficient operation in battery-powered systems |
| Industrial temperature grade | Rated for -40°C to +85°C ambient; qualified for use in motor drives, industrial sensors, and outdoor equipment |
Applications
| Audio Gain Control | DC Bias Trimming |
|---|---|
|
Use Scenario: Adjusting volume or channel balance in professional audio mixers with microcontroller-based UI. IC Role / Device Role / Timing Role: Acts as four independent 50 kΩ variable resistors in voltage-divider configurations feeding op-amp inverting/non-inverting inputs. Use Value: Enables software-controlled, repeatable, and drift-free gain setting without manual potentiometers or DAC+buffer circuits. |
Use Scenario: Compensating offset voltage in instrumentation amplifiers used with strain gauges or thermocouples. IC Role / Device Role / Timing Role: Configured as two-terminal variable resistors in feedback paths or reference legs to null DC error terms. Use Value: Achieves sub-millivolt offset correction with 0.4% resolution and retains calibration across power cycles. |
| Voltage Regulator Setpoint | Sensor Signal Conditioning |
|
Use Scenario: Dynamically adjusting output voltage of adjustable LDOs or DC-DC converters in adaptive power management systems. IC Role / Device Role / Timing Role: Replaces fixed resistor divider on FB pin; wiper position sets VOUT = VREF × (1 + RH/RW). Use Value: Supports remote, firmware-driven voltage scaling with 256-step granularity and factory-trimmed defaults stored in DR0. |
Use Scenario: Scaling and zeroing analog outputs from MEMS accelerometers or RTD interfaces in industrial PLC modules. IC Role / Device Role / Timing Role: Used in both gain-setting (RH/RW) and offset injection (RW-to-ground) configurations within analog front-ends. Use Value: Delivers calibrated 4–20 mA or 0–10 V outputs with <±0.6 MI relative linearity and ratiometric tempco of ±20 ppm/°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ100 | Dual-channel, 100 kΩ, I²C interface, ±30% resistance tolerance, no HOLD or WP pins | Lacks quad-channel density and SPI hold functionality; requires external pull-ups and lacks hardware write protection | Choose for I²C-based systems needing lower channel count and higher resistance value |
| MCP42050-I/SL | Dual-channel, 50 kΩ, SPI interface, 128-tap resolution, 2.7–5.5 V, but only two DCPs and no global transfer instructions | Half the channel count and reduced resolution limit multi-parameter tuning flexibility in compact designs | Choose when dual-channel capability suffices and cost-per-channel is prioritized over configurability |
Compared with AD5242BRUZ100 and MCP42050-I/SL, the X9251US24IZ-2.7 provides superior channel density, finer 256-tap resolution, hardware write protection, and global register transfer-making it optimal for industrial systems requiring simultaneous multi-point calibration and robust field reprogramming.
Availability
X9251US24IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, and embedded audio control requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for X9251US24IZ-2.7 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 specializing in microcontrollers, analog, and power management ICs for industrial, automotive, and infrastructure markets.
The X9251 product line delivers digitally programmable analog front-end components optimized for precision trimming, gain control, and calibration in harsh-environment embedded systems.
FAQ
What is the operating voltage range for the X9251US24IZ-2.7?
The X9251US24IZ-2.7 operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V system rails. This range is explicitly defined in the "Recommended Operating Conditions" table of the FN8166 datasheet, and the "-2.7" suffix denotes this extended low-voltage capability versus the standard 5 V ±10% version.
How many independent potentiometers does the X9251US24IZ-2.7 contain?
The X9251US24IZ-2.7 contains four fully independent digitally controlled potentiometers (DCPs), each with its own RH, RL, and RW pins, dedicated Wiper Counter Register (WCR), and four nonvolatile Data Registers (DR0–DR3). This quad architecture is confirmed in the functional diagram, pin descriptions, and ordering information tables of the FN8166 datasheet.
Does the X9251US24IZ-2.7 support hardware write protection?
Yes, the X9251US24IZ-2.7 supports hardware write protection via the active-low WP pin. When WP is driven LOW, nonvolatile writes to the Data Registers are blocked-even if valid SPI write commands are issued. This feature is documented in the "Pin Descriptions" and "Principles of Operation" sections of the FN8166 datasheet.
What is the resolution and end-to-end resistance of each potentiometer in the X9251US24IZ-2.7?
Each potentiometer in the X9251US24IZ-2.7 offers 256-tap resolution (0.4% step size) and a nominal end-to-end resistance of 50 kΩ with ±20% tolerance. These values are specified in the "Analog Characteristics" table under RTOTAL and Resolution parameters in the FN8166 datasheet Rev 7.00.
Can the X9251US24IZ-2.7 retain wiper settings after power loss?
The X9251US24IZ-2.7 retains wiper settings across power cycles by loading the contents of Data Register zero (DR#0) into the corresponding Wiper Counter Register (WCR) at power-up. While the WCR itself is volatile, DR#0 is nonvolatile with 100-year data retention-ensuring consistent startup behavior without host intervention.
X9251US24IZ-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±300ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-SOIC
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 300 (Max)
X9251US24IZ-2.7 FAQ
1.How can I place an order for X9251US24IZ-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9251US24IZ-2.7 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 X9251US24IZ-2.7 reliable?
The price and inventory of X9251US24IZ-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9251US24IZ-2.7 is usually 5 days.
3.What payment methods are accepted for X9251US24IZ-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9251US24IZ-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9251US24IZ-2.7?
X9251US24IZ-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9251US24IZ-2.7 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 X9251US24IZ-2.7?
For technical support, including X9251US24IZ-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9251US24IZ-2.7 requirements.
6.How does Aetrix verify that X9251US24IZ-2.7 is sourced from the original manufacturer or authorized distributors?
All X9251US24IZ-2.7 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 X9251US24IZ-2.7 meets industry standards.
7.What is the process for return or replacement of X9251US24IZ-2.7?
All X9251US24IZ-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X9251US24IZ-2.7, 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 X9251US24IZ-2.7 part is unused and in its original packaging.
Return procedure for X9251US24IZ-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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