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Renesas X9251UV24I-2.7
- Part No.:
- X9251UV24I-2.7
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
X9251UV24I-2.7.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,364
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Product details
Overview
X9251UV24I-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 X9251UV24I-2.7 datasheet, X9251UV24I-2.7 pinout, X9251UV24I-2.7 application, or X9251UV24I-2.7 equivalent, this page delivers verified electrical specs, SPI timing constraints, nonvolatile register behavior, wiper resistance at low VCC, and real-world circuit-level use cases without generic assumptions.
Technical Context
The X9251UV24I-2.7 implements four independent CMOS-switched resistor arrays, 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, with power-up loading DR#0 into corresponding WCR.
Its SPI interface complies with standard mode-0 (CPOL=0, CPHA=0), supports up to 2MHz clock, includes hardware write protection (WP), HOLD for serial pause, and dual device address pins (A0/A1) enabling up to four devices on one bus. All nonvolatile writes require internal high-voltage generation and complete in 5–10ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of DCPs | Four independent digitally controlled potentiometers on one die-enables multi-channel analog tuning without discrete components. |
| Resolution | 256 taps (8-bit), ±0.4% typical linearity error-supports precise voltage division with <1mV step error at 5V full-scale. |
| VCC Range | 2.7V to 5.5V-operates reliably from Li-ion battery minimum to standard 5V rails, with standby current <3µA. |
| End-to-End Resistance | 50kΩ ±20%-matches common op-amp feedback and sensor bridge impedance requirements. |
| Wiper Resistance | 300Ω typical at VCC = 3V-low enough to avoid significant gain error in voltage divider configurations. |
| Nonvolatile Endurance | 100,000 data changes per bit per register-supports field calibration cycles over product lifetime. |
| Data Retention | 100 years at +25°C-ensures factory-trimmed settings persist across decades of storage or operation. |
| SPI Clock Max | 2MHz-compatible with mid-speed microcontrollers without requiring high-frequency peripherals. |
Pinout & Package
24-lead TSSOP (4.4mm width, M24.173 package drawing), RoHS-compliant, Pb-free matte tin termination. Pin 1 marked by dot; pins 6 and 19 are NC and must be left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SO | Serial output | Three-state SPI data output; driven only when CS is low and instruction requires response-enables bus sharing with other SPI slaves. |
| A0, A1 | Device address inputs | Set two LSBs of slave address; must be hardwired to VSS or VCC-allows up to four X9251UV24I-2.7 devices on same SPI bus. |
| RW0–RW3 | Wiper terminals | Each connects to intermediate node of its DCP; wiper resistance ≤300Ω at 3V enables direct connection to op-amp inputs without buffer. |
| RH0–RH3, RL0–RL3 | Potentiometer terminals | Fixed high/low ends of each 50kΩ resistor array; RH/RL voltage differential must stay within VSS to VCC limits. |
| CS | Chip select | Active-low enable; HIGH places SO in high-Z and enters standby (<3µA)-critical for multi-device SPI arbitration. |
| WP | Write protect | Active-low hardware lock; prevents accidental nonvolatile writes to Data Registers during normal operation. |
| HOLD | Serial pause | Pauses ongoing SPI transaction without resetting state-enables host interrupt handling without losing command context. |
| VCC, VSS | Power supply | Single 2.7–5.5V rail; VCC must always be ≥ all RH/RL/RW voltages-no level-shifting needed for analog signal range. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 256-tap DCPs | Reduces board space and BOM count vs. four discrete digital pots-ideal for multi-channel audio, sensor arrays, or programmable power supplies. |
| Four nonvolatile registers per DCP | Enables storage of multiple calibrated states (e.g., min/max/center/default) per channel-supports factory trim, user presets, and fail-safe recovery. |
| Increment/Decrement command | Allows real-time fine-tuning via clocked SI pulses-eliminates need for host to track absolute position during manual adjustment loops. |
| Hardware write protection (WP) | Prevents corruption of stored calibration data during firmware updates or brown-out events-no software dependency required. |
| Low VCC operation down to 2.7V | Supports direct integration with 3.3V or battery-powered systems without LDO-reduces system power budget and component count. |
| 100-year data retention | Guarantees long-term stability of factory-set parameters in infrastructure or medical equipment where recalibration is impractical. |
Applications
| Audio Gain Control | Sensor Offset Trim |
|---|---|
|
Use Scenario: Adjusting volume or tone in portable audio amplifiers using I²C/SPI microcontroller. IC Role / Device Role / Timing Role: Acts as programmable voltage divider in op-amp feedback path to set closed-loop gain. Use Value: Replaces mechanical potentiometers with stable, repeatable, and remotely configurable attenuation-no drift or wear-out. |
Use Scenario: Compensating thermal offset in bridge-based pressure sensors in industrial transmitters. IC Role / Device Role / Timing Role: Provides adjustable DC bias injection point to nullify zero-point error before signal amplification. Use Value: Enables one-time factory calibration stored in nonvolatile DR#0, surviving power cycles and temperature cycling. |
| Voltage Regulator Feedback | RF Power Amplifier Bias |
|
Use Scenario: Dynamically setting output voltage of adjustable DC-DC converters in telecom power modules. IC Role / Device Role / Timing Role: Serves as programmable resistor in feedback divider network of TLV431 or similar shunt regulator. Use Value: Allows remote reconfiguration of output voltage without hardware change-supports multi-voltage SKUs from single PCB design. |
Use Scenario: Setting quiescent current (IQ) in GaAs RF power amplifiers for LTE base stations. IC Role / Device Role / Timing Role: Functions as two-terminal variable resistor in emitter degeneration path to control DC bias point. Use Value: Maintains consistent linearity and efficiency across temperature via closed-loop calibration stored in nonvolatile registers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ10 | Dual 256-tap, I²C interface, 10kΩ RAB, no HOLD/WP pins, 2.7–5.5V supply. | Lacks hardware write protection and serial pause; requires I²C instead of SPI-less suitable for SPI-only hosts or safety-critical trim. | Choose AD5242BRUZ10 only if I²C bus is available and nonvolatile write security is not required. |
| MCP42050-I/SL | Quad 256-tap, SPI interface, 50kΩ RAB, 2.7–5.5V, but only one nonvolatile register per pot and no HOLD pin. | Lower register count limits preset flexibility; absence of HOLD restricts use in interrupt-driven real-time systems. | Select MCP42050-I/SL when cost is primary constraint and multi-preset storage or serial pause is unnecessary. |
Compared with AD5242BRUZ10 and MCP42050-I/SL, the X9251UV24I-2.7 uniquely combines quad-channel density, four nonvolatile registers per channel, hardware write protection, and serial pause-making it optimal for industrial calibration, multi-parameter sensor systems, and field-upgradable analog front-ends.
Availability
X9251UV24I-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, and audio signal processing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for X9251UV24I-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 delivering microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and IoT applications-with emphasis on reliability, longevity, and system-level integration.
The X9251UV24I-2.7 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in high-reliability analog tuning applications where repeatability, nonvolatile storage, and SPI configurability are essential.
FAQ
What is the minimum VCC required for reliable operation of the X9251UV24I-2.7?
The X9251UV24I-2.7 is specified for operation from 2.7V to 5.5V. At 2.7V, wiper resistance is 300Ω typical, SPI timing remains compliant up to 2MHz, and nonvolatile write time stays within 10ms. Operation below 2.7V may cause undefined behavior or register corruption-do not operate outside this range.
How does the X9251UV24I-2.7 handle power-up initialization?
At power-up, the X9251UV24I-2.7 automatically loads the contents of DR00, DR10, DR20, and DR30 into WCR0–WCR3 respectively. This ensures repeatable startup wiper positions without host intervention-critical for fail-safe analog circuits like voltage references or bias networks.
Can the X9251UV24I-2.7 be used as a two-terminal variable resistor?
Yes-the X9251UV24I-2.7 supports both three-terminal potentiometer (RH–RW–RL) and two-terminal variable resistor (e.g., RH–RW or RW–RL) configurations. Its 50kΩ end-to-end resistance and ≤300Ω wiper resistance make it suitable for current-setting and gain-control applications without external buffering.
What is the purpose of the HOLD pin on the X9251UV24I-2.7?
The HOLD pin on the X9251UV24I-2.7 pauses active SPI communication without resetting the instruction sequence. When asserted LOW (with SCK LOW), it freezes data transfer mid-command-allowing the host MCU to service interrupts and resume seamlessly, preserving timing-critical analog control loops.
Does the X9251UV24I-2.7 support daisy-chaining multiple devices on one SPI bus?
No-the X9251UV24I-2.7 does not support daisy-chaining. It uses standard SPI with individual CS lines. However, up to four units can share one SPI bus using A0/A1 address pins to differentiate slave addresses-enabling compact multi-channel designs without additional GPIOs.
X9251UV24I-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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-TSSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 300 (Max)
X9251UV24I-2.7 FAQ
1.How can I place an order for X9251UV24I-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9251UV24I-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 X9251UV24I-2.7 reliable?
The price and inventory of X9251UV24I-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 X9251UV24I-2.7 is usually 5 days.
3.What payment methods are accepted for X9251UV24I-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9251UV24I-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9251UV24I-2.7?
X9251UV24I-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9251UV24I-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 X9251UV24I-2.7?
For technical support, including X9251UV24I-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9251UV24I-2.7 requirements.
6.How does Aetrix verify that X9251UV24I-2.7 is sourced from the original manufacturer or authorized distributors?
All X9251UV24I-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 X9251UV24I-2.7 meets industry standards.
7.What is the process for return or replacement of X9251UV24I-2.7?
All X9251UV24I-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X9251UV24I-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 X9251UV24I-2.7 part is unused and in its original packaging.
Return procedure for X9251UV24I-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9251UV24I-2.7 Tags
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MCP4011T-103E/SN
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