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Renesas X9271UV14Z
- Part No.:
- X9271UV14Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
X9271UV14Z.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,583
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Product details
Overview
X9271UV14Z from Intersil (now Renesas) is a single-supply, low-power, 256-tap digitally controlled potentiometer (XDCP™) with SPI interface, 50kΩ end-to-end resistance, ±20% tolerance, and 14-lead TSSOP package. It functions as a programmable three-terminal potentiometer or two-terminal variable resistor for precision analog trimming in voltage regulators, sensor signal conditioning, and audio gain control.
For engineers reviewing the X9271UV14Z datasheet, X9271UV14Z pinout, X9271UV14Z application, or X9271UV14Z equivalent, this page delivers verified electrical parameters, SPI timing constraints, nonvolatile register behavior, wiper resistance at 3V/5V, power-on recall functionality, and real-world circuit-level use cases - all confirmed for the exact X9271UV14Z variant with 0°C to +70°C temperature range and 2.7V–5.5V VCC operation.
Technical Context
The X9271UV14Z implements a monolithic CMOS resistor ladder of 255 segments with CMOS-switched wiper access controlled by an 8-bit volatile Wiper Counter Register (WCR). Its SPI interface supports read/write/transfer operations using a 3-byte instruction set with device address pins A0/A1 and hardware write protection via WP.
Power-up automatically loads DR0 into the WCR, enabling deterministic startup behavior. Nonvolatile data registers (16 total, organized in 4 banks) retain wiper positions for up to 100 years with 100,000 write cycles per bit; standby current remains below 3µA, supporting battery-powered applications requiring persistent analog tuning without continuous power draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 50kΩ ±20% - defines full-scale analog adjustment range for gain, bias, or reference setting |
| Wiper Resistance | 150Ω typical at VCC = 5V - limits insertion error and thermal noise in precision divider configurations |
| VCC Operating Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V logic systems without level shifting |
| SPI Clock Frequency | Up to 2.5MHz - supports fast digital reconfiguration during system calibration or dynamic parameter updates |
| Standby Current | <3µA max - allows integration into always-on, ultra-low-power sensor nodes and portable devices |
| Data Retention | 100 years - ensures long-term reliability of factory-trimmed or user-saved settings across product lifetime |
| Resolution | 0.4% - corresponds to 256 discrete tap positions, enabling fine-grained analog control (≈392Ω/step) |
Pinout & Package
Package: 14-lead TSSOP (4.4mm width), RoHS-compliant, Pb-free plus anneal finish (M14.173 drawing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SO | Serial Data Output | Three-state output for SPI read operations; clocked on SCK falling edge; may be tied to SI for single-wire bus reduction |
| 2 A0 | Device Address Input | LSB of 2-bit slave address; sets unique SPI address when multiple X9271 devices share bus |
| 3 NC | No Connect | Internally unused; must remain floating per manufacturer specification |
| 4 CS | Chip Select | Active-low enable; HIGH places device in standby; LOW initiates SPI communication sequence |
| 5 SCK | Serial Clock | Master-generated clock; rising edge latches SI data, falling edge clocks SO data |
| 6 SI | Serial Data Input | Accepts instruction bytes, addresses, and data; compatible with SO for bidirectional bus sharing |
| 7 VSS | System Ground | Reference node for all analog and digital circuitry; requires low-impedance connection to PCB ground plane |
| 8 WP | Hardware Write Protect | LOW disables nonvolatile writes to data registers; prevents accidental configuration erasure during operation |
| 9 A1 | Device Address Input | MSB of 2-bit slave address; combined with A0, selects one of four possible SPI addresses |
| 10 HOLD | Serial Bus Pause | Pauses ongoing SPI transfer without resetting state; requires SCK LOW before assertion |
| 11 RW | Wiper Terminal | Analog output node of potentiometer; connects to amplifier feedback, comparator input, or bias network |
| 12 RH | High Terminal | Fixed high-side resistor array terminal; typically connected to VCC or positive reference voltage |
| 13 RL | Low Terminal | Fixed low-side resistor array terminal; typically connected to VSS or negative reference |
| 14 VCC | System Supply Voltage | Power rail for analog ladder and digital interface; must exceed RH/RL/RW voltages per absolute max ratings |
Key Features
| Feature | Design Value |
|---|---|
| 256-tap resistor ladder | Enables precise 0.4% resolution analog adjustment without mechanical wear or contact bounce |
| Nonvolatile data registers (16 bytes) | Stores up to 16 independent wiper positions or system parameters across power cycles |
| Power-on recall from DR0 | Guarantees known startup state without host initialization delay or firmware dependency |
| SPI-compatible serial interface | Reduces MCU pin count vs. parallel interfaces; supports daisy-chaining and multi-device addressing |
| Hardware write protect (WP) | Prevents unintended register corruption during ESD events, noise transients, or firmware faults |
Applications
| Audio Volume Control | Voltage Regulator Feedback Trim |
|---|---|
|
Use Scenario: Adjusting gain in headphone amplifier stages or line-out circuits with digital control from microcontroller. IC Role / Device Role / Timing Role: Acts as programmable two-terminal variable resistor between amplifier output and inverting input, setting closed-loop gain. Use Value: Eliminates manual potentiometers; enables remote volume control, mute, and preset storage via nonvolatile registers. |
Use Scenario: Fine-tuning output voltage of adjustable DC-DC converters or LDOs during production calibration or field updates. IC Role / Device Role / Timing Role: Replaces fixed resistor in feedback divider network to dynamically adjust regulation setpoint. Use Value: Enables post-manufacture compensation for component tolerances and thermal drift without hardware change. |
| Sensor Signal Conditioning | RF Power Amplifier Bias Control |
|
Use Scenario: Nulling offset voltage and scaling full-scale range in bridge-based pressure or temperature sensor front-ends. IC Role / Device Role / Timing Role: Configures programmable gain and zero-point offset in instrumentation amplifier feedback paths. Use Value: Supports auto-calibration routines and adaptive compensation for aging or environmental variation. |
Use Scenario: Setting quiescent bias current in GaAs or SiGe RF power amplifiers to optimize linearity and efficiency. IC Role / Device Role / Timing Role: Provides stable, digitally adjustable DC bias voltage to amplifier base/gate terminals. Use Value: Allows dynamic PA class adjustment (e.g., Class A to AB) and temperature-compensated biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5241BRMZ10 | 10kΩ end-to-end resistance, I²C interface, 128 taps, no hardware write protect pin | Limited resolution and narrower resistance range; lacks HOLD and WP pins for robust industrial bus operation | Preferred where I²C infrastructure exists and lower resolution suffices; not drop-in due to interface and pinout mismatch |
| MCP41010-I/P | 10kΩ end-to-end resistance, SPI interface, 257 taps, no nonvolatile register bank structure | Single volatile wiper register only; no DR0 power-on recall or multi-register storage capability | Selected for cost-sensitive designs needing basic SPI pot functionality without persistent configuration storage |
Compared with AD5241BRMZ10 and MCP41010-I/P, the X9271UV14Z provides higher resolution (256 vs. 128/257), wider resistance range (50kΩ), hardware write protection, and true nonvolatile multi-register storage - making it uniquely suited for applications demanding deterministic startup, field recalibration, and industrial-grade bus robustness.
Availability
X9271UV14Z is available at Aetrix Electronics and suitable for voltage regulator trimming, sensor signal conditioning, audio gain control, and RF bias adjustment requiring stable component supply across commercial temperature range (0°C to +70°C) and 2.7V–5.5V operation.
Supply support for X9271UV14Z 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 (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The X9271UV14Z belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in precision analog systems requiring programmable, nonvolatile, and low-power resistance adjustment.
FAQ
What is the operating voltage range for the X9271UV14Z?
The X9271UV14Z operates from 2.7V to 5.5V on VCC, supporting both 3.3V and 5V system rails. This range is explicitly specified for the X9271UV14Z variant in the ordering table and validated across its 0°C to +70°C commercial temperature grade. Operation outside this range violates absolute maximum ratings and may cause functional failure or reduced data retention.
Does the X9271UV14Z retain its wiper position after power cycling?
Yes - the X9271UV14Z loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) on every power-up, ensuring repeatable startup behavior. DR0 itself is nonvolatile and retains its value for up to 100 years, so the X9271UV14Z delivers deterministic analog state restoration without host intervention.
Can the X9271UV14Z be used as a two-terminal variable resistor?
Yes - the X9271UV14Z supports both three-terminal potentiometer (RH–RW–RL) and two-terminal variable resistor (e.g., RH–RW or RW–RL) configurations. Its datasheet confirms this dual-mode operation, and the 50kΩ end-to-end resistance and 150Ω typical wiper resistance at 5V define usable range and insertion loss in either topology.
How many nonvolatile registers does the X9271UV14Z have, and what are they used for?
The X9271UV14Z contains 16 bytes of nonvolatile memory organized as four 8-bit data registers per bank across four banks (Bank 0–3). Bank 0 registers support direct transfer to the WCR for wiper positioning; Banks 1–3 serve as general-purpose nonvolatile storage for system parameters or user preferences, with full SPI read/write access.
Is the X9271UV14Z pin-compatible with other variants in the X9271 family?
Yes - all X9271 variants, including X9271UV14Z, X9271UV14IZ, and X9271UV14IZ-2.7T1, share identical 14-lead TSSOP packaging and pinout per the M14.173 drawing. Differences lie solely in temperature grade, VCC range, and marking; thus, X9271UV14Z can be substituted onto existing footprints designed for any X9271 variant, provided operating conditions align.
X9271UV14Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- 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:
- 14-TSSOP
- Operating Temperature:
- 0°C ~ 70°C
- Resistance - Wiper (Ohms) (Typ):
- 150 (Max)
X9271UV14Z FAQ
1.How can I place an order for X9271UV14Z through Aetrix?
Please submit a Request for Quotation (RFQ) for X9271UV14Z 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 X9271UV14Z reliable?
The price and inventory of X9271UV14Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9271UV14Z is usually 5 days.
3.What payment methods are accepted for X9271UV14Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9271UV14Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9271UV14Z?
X9271UV14Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9271UV14Z 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 X9271UV14Z?
For technical support, including X9271UV14Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9271UV14Z requirements.
6.How does Aetrix verify that X9271UV14Z is sourced from the original manufacturer or authorized distributors?
All X9271UV14Z 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 X9271UV14Z meets industry standards.
7.What is the process for return or replacement of X9271UV14Z?
All X9271UV14Z units undergo pre-shipment inspection (PSI). If there is an issue with X9271UV14Z, 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 X9271UV14Z part is unused and in its original packaging.
Return procedure for X9271UV14Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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