My Inquiry
My Account
Renesas X9251US24Z-2.7
- Part No.:
- X9251US24Z-2.7
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X9251US24Z-2.7.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,433
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
X9251US24Z-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 nonvolatile data register storage - used for precision gain/voltage trimming in analog signal chains.
For engineers reviewing the X9251US24Z-2.7 datasheet, X9251US24Z-2.7 pinout, X9251US24Z-2.7 application, or X9251US24Z-2.7 equivalent, this page delivers verified electrical specs, validated SPI timing behavior, confirmed wiper position control logic, and real-world use cases in sensor conditioning, audio volume control, and DC bias adjustment.
Technical Context
The X9251US24Z-2.7 implements four independent DCPs using resistor ladders and CMOS switches, each controlled by an 8-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). At power-up, DR#0 values load into corresponding WCRs to restore default wiper positions.
Its SPI interface supports three-byte read/write operations (e.g., Read/Write WCR, Read/Write DR), two-byte transfer instructions (e.g., XFR DR→WCR), and real-time increment/decrement mode with SI-driven step control. Hardware write protection (WP) and HOLD pause functionality ensure robust system-level bus management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of DCPs | Four independent digitally controlled potentiometers on one die |
| Resolution | 256 taps (8-bit), enabling 0.4% resistance step resolution |
| End-to-End Resistance | 50kΩ ±20%, stable across 0°C to +70°C operating range |
| VCC Range | 2.7V to 5.5V - supports low-voltage microcontroller interfacing without level shifters |
| Standby Current | <5µA max - enables battery-powered applications with extended sleep duration |
| Data Retention | 100 years - ensures long-term calibration storage without refresh |
| Nonvolatile Write Endurance | 100,000 cycles per bit - sufficient for field calibration and firmware updates |
| SPI Clock Frequency | Up to 2MHz - compatible with standard MCU SPI peripherals at moderate speed |
Pinout & Package
24-lead TSSOP (4.4mm body width, Pb-free RoHS-compliant); pin-compatible with other X9251 variants including X9251UV24Z and X9251UV24IZ-2.7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SO | Serial Output | Three-state SPI data output; driven on falling SCK edge during reads |
| A0, A1 | Device Address Inputs | Set LSBs of slave address (00–11); must be hardwired to VSS/VCC for multi-device SPI bus |
| RW0–RW3 | Wiper Terminals | Output nodes for each DCP; voltage follows WCR position between RHx and RLx |
| RH0–RH3, RL0–RL3 | Potentiometer Terminals | Fixed high/low ends of each 50kΩ resistor ladder; support 3-terminal pot or 2-terminal rheostat use |
| VCC, VSS | Power Supply | Single 2.7V–5.5V supply; no separate analog/digital rails required |
| CS, SCK, SI, WP, HOLD | SPI Control & Protection | Standard SPI signals plus hardware write protect (WP active-low) and communication pause (HOLD) |
| NC (Pins 6, 19) | No Connect | Reserved for manufacturing test; must remain unconnected and floating |
Key Features
| Feature | Design Value |
|---|---|
| Quad DCP Integration | Replaces four discrete mechanical pots or DAC+buffer circuits, reducing board area and BOM count |
| Volatile WCR + Nonvolatile DRs | Enables runtime wiper adjustment (WCR) while preserving factory/user calibration settings (DR0–DR3) |
| Hardware Write Protect (WP) | Prevents accidental overwrites of nonvolatile registers during firmware execution or noise events |
| Increment/Decrement Mode | Allows fine-grained, clock-synchronized wiper stepping via SI level during active SPI session |
| Power-Up Default Recall | Automatically loads DR#0 into WCR on reset - ensures known startup state without host initialization |
| Low Power Standby | <5µA current draw in CS=HIGH state - critical for always-on sensor nodes and portable devices |
Applications
| Audio Volume Control | Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Adjusting gain in line-level audio preamplifiers or headphone drivers. IC Role / Device Role / Timing Role: Acts as programmable voltage divider in feedback path of op-amp-based amplifier stages. Use Value: Enables digital volume control with 0.4% step resolution and zero drift over temperature (±20ppm ratiometric TC). |
Use Scenario: Trimming offset and gain errors in bridge-based pressure or temperature sensor interfaces. IC Role / Device Role / Timing Role: Configures reference voltage and feedback ratio in instrumentation amplifier front-ends. Use Value: Delivers 100-year calibration retention and 256-step precision to maintain accuracy across product lifetime. |
| DC Bias Adjustment in RF PA | Voltage Regulator Feedback Scaling |
|
Use Scenario: Setting quiescent current in GaAs or SiGe RF power amplifiers for optimal linearity and efficiency. IC Role / Device Role / Timing Role: Provides programmable DC bias voltage to gate/base terminals via resistive divider network. Use Value: Supports 2.7V–5.5V operation matching modern RF IC supply domains; wiper resistance ≤300Ω minimizes loading error. |
Use Scenario: Dynamically scaling output voltage of adjustable switching regulators (e.g., buck converters). IC Role / Device Role / Timing Role: Replaces fixed resistor in feedback divider to enable software-controlled VOUT tuning. Use Value: Enables closed-loop calibration and adaptive output regulation without hardware modification. |
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 | Single 10kΩ DCP, I²C interface, 256-tap, ±30% RTOTAL tolerance | Lacks quad integration and nonvolatile DR storage; requires external EEPROM for calibration persistence | Choose when board space is constrained and only one pot is needed with I²C bus compatibility |
| MCP42050-I/P | Dual 50kΩ DCP, SPI interface, 256-tap, no nonvolatile registers, 100kΩ wiper resistance typical | Requires continuous host refresh of wiper positions; no power-up recall or multi-setting storage | Choose for cost-sensitive dual-pot applications where calibration persistence is handled externally |
Compared with AD5242BRUZ10 and MCP42050-I/P, the X9251US24Z-2.7 uniquely combines quad-channel integration, nonvolatile multi-register storage, and guaranteed 0.4% resolution - eliminating external memory and reducing calibration overhead in multi-parameter analog systems.
Availability
X9251US24Z-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, audio equipment design, and RF power amplifier biasing requiring stable component supply and long-term parameter retention.
Supply support for X9251US24Z-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 mixed-signal, and power management solutions for industrial, automotive, and IoT applications.
The X9251 product line delivers digitally programmable analog front-end components optimized for precision trimming, calibration, and dynamic gain control in resource-constrained embedded systems.
FAQ
What is the power-up behavior of the X9251US24Z-2.7?
At power-up, the X9251US24Z-2.7 automatically loads the contents of Data Register zero (DR00, DR10, DR20, DR30) into the corresponding volatile Wiper Counter Registers (WCR0–WCR3). This ensures repeatable default wiper positions without host intervention, provided VCC ramp rate meets minimum 0.2V/ms specification.
Does the X9251US24Z-2.7 support true 3-wire SPI configuration?
Yes, the X9251US24Z-2.7 supports 3-wire SPI by connecting SO and SI together, leveraging their three-state outputs. The device uses rising-edge sampling on SI and falling-edge output on SO, allowing bidirectional half-duplex communication on a single data line - reducing MCU pin count in space-constrained designs.
How does hardware write protection (WP) function on the X9251US24Z-2.7?
When the WP pin is held LOW, the X9251US24Z-2.7 blocks all nonvolatile write operations to its Data Registers (DR0–DR3), preventing accidental corruption of stored calibration values. Volatile WCR writes remain enabled, allowing runtime adjustment without altering persistent settings.
What is the maximum wiper current rating for the X9251US24Z-2.7?
The X9251US24Z-2.7 specifies a maximum wiper current of ±3mA per DCP channel. Exceeding this limit risks localized heating and long-term resistance drift. For higher-current applications, external buffer amplifiers should be used to isolate the wiper node from load currents.
Can the X9251US24Z-2.7 operate reliably at 2.7V supply?
Yes, the X9251US24Z-2.7 is explicitly rated for 2.7V to 5.5V operation. At 2.7V, wiper resistance increases to 300Ω typical (vs. 220Ω at 5V), and SPI timing remains compliant up to 2MHz - making it suitable for ultra-low-power systems powered by single Li-ion cells or energy-harvesting sources.
X9251US24Z-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:
- 0°C ~ 70°C
- Resistance - Wiper (Ohms) (Typ):
- 300 (Max)
X9251US24Z-2.7 FAQ
1.How can I place an order for X9251US24Z-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9251US24Z-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 X9251US24Z-2.7 reliable?
The price and inventory of X9251US24Z-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 X9251US24Z-2.7 is usually 5 days.
3.What payment methods are accepted for X9251US24Z-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9251US24Z-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9251US24Z-2.7?
X9251US24Z-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9251US24Z-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 X9251US24Z-2.7?
For technical support, including X9251US24Z-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9251US24Z-2.7 requirements.
6.How does Aetrix verify that X9251US24Z-2.7 is sourced from the original manufacturer or authorized distributors?
All X9251US24Z-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 X9251US24Z-2.7 meets industry standards.
7.What is the process for return or replacement of X9251US24Z-2.7?
All X9251US24Z-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X9251US24Z-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 X9251US24Z-2.7 part is unused and in its original packaging.
Return procedure for X9251US24Z-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9251US24Z-2.7 Tags
-
MCP4018T-103E/LT
Microchip Technology
-
MCP4018T-503E/LT
Microchip Technology
-
MCP4011T-103E/SN
Microchip Technology
-
MCP4018T-104E/LT
Microchip Technology
-
MCP4017T-503E/LT
Microchip Technology
-
MCP4018T-502E/LT
Microchip Technology
-
MCP4017T-103E/LT
Microchip Technology
-
MCP4531T-103E/MF
Microchip Technology
-
MCP4021T-202E/SN
Microchip Technology
-
MCP4023T-103E/CH
Microchip Technology
-
MCP4022T-503E/CH
Microchip Technology
-
MCP4551T-502E/MS
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
