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Renesas X9251UV24IZ-2.7T1
- Part No.:
- X9251UV24IZ-2.7T1
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
X9251UV24IZ-2.7T1.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
X9251UV24IZ-2.7T1 from Renesas is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution, SPI interface, 50kΩ end-to-end resistance, -40°C to +85°C operating range, and 2.7V–5.5V single-supply operation-used for precision gain control, DC bias trimming, and sensor signal conditioning in industrial and embedded systems.
For engineers reviewing the X9251UV24IZ-2.7T1 datasheet, X9251UV24IZ-2.7T1 pinout, X9251UV24IZ-2.7T1 application, or X9251UV24IZ-2.7T1 equivalent, this page delivers verified electrical specs, validated SPI timing, confirmed nonvolatile register behavior, wiper resistance at 3V/5V, and real-world circuit-level use cases including LCD contrast adjustment and RF power amplifier biasing.
Technical Context
The X9251UV24IZ-2.7T1 integrates 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 tWRL ≤ 10µs response after instruction issuance.
It implements true three-terminal potentiometer or two-terminal variable resistor configurations per channel, supports hardware write protection (WP), device addressing via A0/A1 pins, and HOLD-based SPI pause functionality-all while maintaining <5µA standby current and 100-year data retention in DR registers.
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 tuning in closed-loop systems |
| End-to-End Resistance | 50kΩ ±20%; matches standard feedback network values for op-amp gain setting |
| Wiper Resistance | 300Ω typical at VCC = 3V; 220Ω typical at VCC = 5V-minimizes loading error in high-impedance nodes |
| Supply Voltage Range | 2.7V to 5.5V; supports battery-powered and mixed-voltage industrial designs |
| Operating Temperature | -40°C to +85°C; qualified for industrial-grade embedded applications |
| Nonvolatile Endurance | 100,000 data changes per bit per register; sufficient for field calibration cycles over product lifetime |
| Standby Current | <5µA max; enables low-power sleep modes in portable and IoT edge devices |
Pinout & Package
24-lead TSSOP (4.4mm wide), RoHS-compliant, Pb-free, moisture sensitivity level (MSL) compliant per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SO | SPI serial output | Three-state output; data clocked out on SCK falling edge-enables daisy-chaining or shared bus topology |
| SI | SPI serial input | Latches data on SCK rising edge; supports bidirectional SO/SI wire sharing to reduce MCU pin count |
| SCK | SPI clock input | Accepts up to 2MHz clock; timing-critical for register access and wiper update synchronization |
| CS | Chip select (active low) | Enables active power mode; HIGH places SO in high-Z and enters standby (<5µA) |
| WP | Hardware write protect | Active-low; blocks nonvolatile writes to DR registers-prevents accidental calibration loss |
| HOLD | SPI communication pause | Pauses ongoing SPI sequence without reset; requires SCK LOW before assertion |
| A0, A1 | Device address inputs | Set LSBs of slave address; allow up to four X9251UV24IZ-2.7T1 devices on same SPI bus |
| RH0–RH3 | High terminal (each DCP) | Fixed end of resistor ladder; connects to VCC or reference voltage in divider configuration |
| RL0–RL3 | Low terminal (each DCP) | Fixed end of resistor ladder; connects to GND or signal return path |
| RW0–RW3 | Wiper terminal (each DCP) | Programmable tap point; output node for voltage division or variable resistance |
| VCC, VSS | Power supply and ground | Single 2.7–5.5V rail; VCC must always be ≥ all RH/RL/RW voltages during operation |
| NC (pins 6, 19) | No connect | Internally unused; must remain floating per Renesas specification |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration | Replaces four discrete mechanical pots or DAC+buffer circuits-reducing board area and BOM count |
| Nonvolatile data storage | Four 8-bit DRs per channel retain wiper positions across power cycles; eliminates boot-time reinitialization |
| SPI increment/decrement mode | Real-time fine-tuning via clocked SI HIGH/LOW pulses-enables user-adjustable knobs without host CPU intervention |
| Hardware write protection | WP pin disables DR writes independently of software control-ensures calibration integrity in field-deployed systems |
| Low-power standby | <5µA ICC2 at VCC = 6V with CS HIGH-extends battery life in portable instrumentation and sensor nodes |
| Industrial temperature rating | -40°C to +85°C operation validated per Renesas test flow-supports deployment in harsh environments |
Applications
| Audio Volume Control | RF Power Amplifier Biasing |
|---|---|
Use Scenario: Adjusting gain in headphone amplifier stages or line-out circuits. IC Role / Device Role / Timing Role: Acts as programmable two-terminal variable resistor in feedback path of op-amp or as three-terminal voltage divider for DC-coupled attenuation. Use Value: Eliminates mechanical wear and noise; enables digital recall of user volume presets via DR0–DR3 storage. |
Use Scenario: Setting quiescent current (IQ) and bias point in GaAs or SiGe RF PAs. IC Role / Device Role / Timing Role: Provides stable, temperature-compensated DC bias voltage via RH/RW/RL configuration with ratiometric tempco of ±20ppm/°C. Use Value: Maintains PA linearity and efficiency across thermal cycling-no manual recalibration required. |
| LCD Contrast Adjustment | Sensor Signal Conditioning |
Use Scenario: Tuning contrast voltage (VCOM) in character or segment LCD displays. IC Role / Device Role / Timing Role: Functions as three-terminal potentiometer between VDD and VSS, delivering adjustable mid-rail reference to LCD driver IC. Use Value: Enables factory-set or user-adjustable contrast without external trimmer; retains setting through power cycles. |
Use Scenario: Trimming offset and gain in bridge-based pressure or temperature sensor front-ends. IC Role / Device Role / Timing Role: Configured as Wheatstone bridge arm or op-amp feedback element to null sensor zero-error and scale full-scale output. Use Value: Achieves <±1 LSB absolute linearity error and ±0.6 LSB relative linearity-meeting industrial sensor accuracy requirements. |
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 | I²C interface only; 10kΩ end-to-end resistance; no HOLD or WP pins; 2.7–5.5V supply | Lacks SPI compatibility and hardware write protection-requires firmware-level lockout for DR-equivalent registers | Select when I²C bus availability and lower resistance value are prioritized over SPI timing control and robust calibration security |
| MCP42010-I/P | Dual-channel (not quad); 10kΩ; SPI interface; no nonvolatile DRs-wiper resets to mid-scale on power-up | Requires host MCU to reload wiper positions at startup; unsuitable for unattended or remote recalibration scenarios | Choose for cost-sensitive dual-pot applications where nonvolatile storage is not required and board space allows separate devices |
Compared with AD5242BRUZ10 and MCP42010-I/P, the X9251UV24IZ-2.7T1 uniquely delivers quad-channel SPI control with hardware write protection, four nonvolatile registers per channel, and industrial temperature support-making it optimal for field-programmable, maintenance-free analog tuning in embedded systems.
Availability
X9251UV24IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and communications infrastructure requiring stable component supply, long-term calibration retention, and SPI-compatible digital potentiometer functionality.
Supply support for X9251UV24IZ-2.7T1 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 power, and mixed-signal solutions for automotive, industrial, and IoT markets.
The X9251UV24IZ-2.7T1 belongs to Renesas' XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically to replace mechanical trimmers in programmable analog signal paths while ensuring calibration persistence and system-level configurability.
FAQ
What is the maximum SPI clock frequency supported by the X9251UV24IZ-2.7T1?
The X9251UV24IZ-2.7T1 supports SPI clock frequencies up to 2 MHz, with minimum cycle time of 500 ns, tWH/tWL ≥ 200 ns, and setup/hold times of 50 ns. This allows reliable communication with most modern microcontrollers without requiring clock stretching or additional timing margins.
How does the X9251UV24IZ-2.7T1 handle power-up initialization?
At power-up, the X9251UV24IZ-2.7T1 automatically loads the contents of DR00, DR10, DR20, and DR30 into their respective Wiper Counter Registers (WCR0–WCR3). This ensures repeatable, factory-programmed wiper positions without host intervention-critical for unattended startup in industrial controllers.
Can the X9251UV24IZ-2.7T1 be used as a two-terminal variable resistor?
Yes-the X9251UV24IZ-2.7T1 supports both three-terminal potentiometer (RH–RW–RL) and two-terminal variable resistor (e.g., RH–RW or RW–RL) configurations. Each DCP channel operates independently, enabling flexible analog design such as current-limiting or gain-setting resistors in discrete amplifier stages.
What is the wiper resistance of the X9251UV24IZ-2.7T1 at 3.3V supply?
Per the datasheet, the X9251UV24IZ-2.7T1 exhibits typical wiper resistance of 300Ω at VCC = 3V and 220Ω at VCC = 5V. At 3.3V, interpolation yields ~280Ω typical-low enough to avoid significant loading error in 10kΩ+ feedback networks used in precision op-amp circuits.
Does the X9251UV24IZ-2.7T1 support daisy-chained SPI connections?
No-the X9251UV24IZ-2.7T1 uses standard SPI with dedicated CS per device and does not support daisy-chain mode. However, its A0/A1 address pins allow up to four units on a shared SPI bus, and SO/SI can be wired together (with tri-state control) to minimize MCU pin usage in multi-pot systems.
X9251UV24IZ-2.7T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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)
X9251UV24IZ-2.7T1 FAQ
1.How can I place an order for X9251UV24IZ-2.7T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9251UV24IZ-2.7T1 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 X9251UV24IZ-2.7T1 reliable?
The price and inventory of X9251UV24IZ-2.7T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9251UV24IZ-2.7T1 is usually 5 days.
3.What payment methods are accepted for X9251UV24IZ-2.7T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9251UV24IZ-2.7T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9251UV24IZ-2.7T1?
X9251UV24IZ-2.7T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9251UV24IZ-2.7T1 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 X9251UV24IZ-2.7T1?
For technical support, including X9251UV24IZ-2.7T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9251UV24IZ-2.7T1 requirements.
6.How does Aetrix verify that X9251UV24IZ-2.7T1 is sourced from the original manufacturer or authorized distributors?
All X9251UV24IZ-2.7T1 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 X9251UV24IZ-2.7T1 meets industry standards.
7.What is the process for return or replacement of X9251UV24IZ-2.7T1?
All X9251UV24IZ-2.7T1 units undergo pre-shipment inspection (PSI). If there is an issue with X9251UV24IZ-2.7T1, 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 X9251UV24IZ-2.7T1 part is unused and in its original packaging.
Return procedure for X9251UV24IZ-2.7T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9251UV24IZ-2.7T1 Tags
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