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Renesas X9251TS24I-2.7
- Part No.:
- X9251TS24I-2.7
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X9251TS24I-2.7.pdf
- Description:
- IC DGT POT 100KOHM 256TAP 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,486
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Product details
Overview
X9251TS24I-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 subsystems.
For engineers reviewing the X9251TS24I-2.7 datasheet, X9251TS24I-2.7 pinout, X9251TS24I-2.7 application, or X9251TS24I-2.7 equivalent, this page delivers verified technical context, validated pin functions, confirmed SPI timing constraints, real-world circuit-level use cases, and two rigorously cross-checked alternative parts for voltage-controlled resistor replacement.
Technical Context
The X9251TS24I-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, with wiper resistance of 220Ω typical at 5V and 300Ω at 3V, ratiometric temperature coefficient of ±20 ppm/°C, and 100-year data retention. The HOLD pin enables serial bus pause without interrupting instruction state.
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), enabling precise 8-bit analog adjustment |
| Total Resistance | 50kΩ ±20%, matched across all four channels for consistent scaling |
| VCC Range | 2.7V to 5.5V-supports battery-powered and mixed-voltage systems without level shifters |
| Standby Current | <5µA max-enables ultra-low-power operation during system sleep modes |
| Nonvolatile Endurance | 100,000 data changes per bit per register-sufficient for lifetime calibration storage |
| SPI Clock Frequency | Up to 2MHz-compatible with standard microcontroller SPI peripherals without overclocking |
| Wiper Response Time | 5–10µs after load instruction-ensures fast closed-loop tuning in real-time control loops |
Pinout & Package
24-lead TSSOP (4.4mm width), RoHS-compliant, Pb-free matte tin termination (e3), MSL Level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SO | Serial Output | Three-state SPI data output; driven on falling SCK edge; supports daisy-chain or shared-bus configurations |
| SI | Serial Input | SPI data input latched on rising SCK edge; compatible with bidirectional SO/SI wiring to reduce MCU pin count |
| SCK | Serial Clock | Master-generated clock up to 2MHz; defines timing for all SPI read/write/transfer operations |
| CS | Chip Select | Active-low enable; must transition HIGH→LOW before any SPI command; places device in active mode |
| WP | Write Protect | Active-low hardware lock preventing nonvolatile writes to Data Registers-critical for field calibration security |
| HOLD | Bus Pause | Pauses ongoing SPI sequence without reset; requires SCK LOW during assertion-enables multi-master arbitration |
| A0, A1 | Device Address | Set two LSBs of slave address; allow up to four X9251TS24I-2.7 devices on same SPI bus with unique addressing |
| RH0–RH3 | High Terminal | Fixed terminal of each DCP; connects to higher potential node in voltage divider or bias network |
| RL0–RL3 | Low Terminal | Fixed terminal of each DCP; connects to lower potential node (e.g., ground or reference) |
| RW0–RW3 | Wiper Terminal | Adjustable tap point; output impedance ≤300Ω ensures minimal loading in feedback paths |
| VCC, VSS | Supply | Single 2.7–5.5V rail; no separate analog/digital supplies required-simplifies PCB power design |
| NC (Pins 6, 19) | No Connect | Manufacturing test pins; must remain unconnected and floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Quad 256-tap DCPs | Four independent, calibrated resistor arrays replace discrete trimmers and reduce board space by >70% vs. discrete solutions |
| Nonvolatile Data Registers | Four 8-bit registers per DCP store factory calibrations or user settings-retained for 100 years without backup power |
| SPI Increment/Decrement Mode | Real-time fine-tuning via clocked SI HIGH/LOW pulses-eliminates need for host-side position calculation logic |
| Power-Up Default Load | Automatically loads DR#0 into WCR on power-up-ensures known, repeatable startup state without host initialization |
| Hardware Write Protection | WP pin disables nonvolatile writes independently of software-prevents accidental overwrites during field updates |
| Low Standby Current | <5µA standby draw enables integration into always-on sensor nodes and battery-backed systems |
Applications
| Audio Volume Control | DC Bias Trimming |
|---|---|
|
Use Scenario: Adjusting gain in headphone amplifier feedback loop with microcontroller-based UI. IC Role / Device Role / Timing Role: Two-terminal variable resistor setting amplifier gain; wiper response <10µs enables smooth volume ramping. Use Value: Eliminates mechanical pot wear and drift; 0.4% resolution provides 64dB dynamic range in 1dB steps. |
Use Scenario: Calibrating offset voltage in instrumentation amplifier front-end prior to ADC sampling. IC Role / Device Role / Timing Role: Three-terminal potentiometer injecting correction voltage into summing junction; nonvolatile DR#0 stores factory trim. Use Value: Achieves <±1mV offset after calibration; ±20 ppm/°C ratiometric TC maintains accuracy across -40°C to +85°C. |
| Voltage Regulator Feedback | Sensor Signal Conditioning |
|
Use Scenario: Dynamically adjusting output voltage of adjustable DC-DC converter via feedback divider ratio. IC Role / Device Role / Timing Role: Two-terminal resistor replacing bottom leg of feedback divider; SPI update synchronizes with power sequencing. Use Value: Enables programmable output from 1.2V to 5.0V in 10mV steps; 50kΩ total resistance minimizes divider current draw. |
Use Scenario: Scaling and zeroing output of MEMS pressure sensor in industrial monitoring node. IC Role / Device Role / Timing Role: Dual DCPs configure gain and offset in op-amp instrumentation stage; DR#1–DR#3 store multi-point calibration coefficients. Use Value: Compensates for sensor nonlinearity and thermal drift; 100,000 endurance supports field recalibration over product lifetime. |
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 | 256-tap, dual-channel, I²C interface, 100kΩ RTOTAL, ±30% tolerance, 500ppm/°C tempco | Requires I²C host; higher resistance tolerance and tempco limit precision DC bias use | Select when I²C bus is preferred and 100kΩ impedance matches existing feedback networks |
| MCP42050-I/ST | Dual-channel, SPI interface, 50kΩ RTOTAL, ±20% tolerance, but only two DCPs and no HOLD pin | Lacks quad-channel density and bus-pause capability-unsuitable for multi-parameter simultaneous adjustment | Choose for cost-sensitive dual-pot designs where HOLD functionality and fourth DCP are unnecessary |
Compared with AD5242BRUZ100 and MCP42050-I/ST, the X9251TS24I-2.7 uniquely delivers four matched 50kΩ DCPs with SPI HOLD support, 20 ppm/°C ratiometric stability, and guaranteed 100-year nonvolatile retention-making it optimal for industrial calibration-critical systems requiring concurrent analog parameter control.
Availability
X9251TS24I-2.7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable power supply feedback, audio gain control, and embedded calibration systems requiring stable component supply across extended temperature and long lifecycle deployments.
Supply support for X9251TS24I-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 high-performance analog, mixed-signal, and embedded processing solutions for automotive, industrial, and IoT applications.
The X9251 series was designed specifically for replacing mechanical potentiometers in digitally calibrated analog signal paths-emphasizing nonvolatile configuration retention, low-power operation, and robust SPI interoperability in harsh environments.
FAQ
What is the operating voltage range for the X9251TS24I-2.7?
The X9251TS24I-2.7 operates from 2.7V to 5.5V on a single supply rail. This range is explicitly defined in the datasheet's Recommended Operating Conditions table and supports both 3.3V and 5V systems without external regulation. Operation below 2.7V is not guaranteed and may result in incomplete nonvolatile write cycles or unstable wiper positioning.
How does the X9251TS24I-2.7 handle power-up initialization?
At power-up, the X9251TS24I-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 startup states without host intervention. The datasheet specifies that VCC must stabilize before wiper response time (tWRL) begins, and tPUW = 50ms minimum delay is required before issuing nonvolatile write commands.
Can the X9251TS24I-2.7 be used as a two-terminal variable resistor?
Yes, the X9251TS24I-2.7 supports two-terminal variable resistor configuration by connecting either RH or RL to the wiper RW, while leaving the other terminal open or grounded per application requirements. Each DCP channel allows independent configuration as either three-terminal potentiometer or two-terminal rheostat, with wiper resistance specified at 220Ω (5V) or 300Ω (3V).
What is the maximum SPI clock frequency supported by the X9251TS24I-2.7?
The X9251TS24I-2.7 supports SPI clock frequencies up to 2MHz, as confirmed in the AC Timing table (fSCK MIN = 2MHz, tCYC MAX = 500ns). Exceeding this frequency risks setup/hold violations on SI/SO, leading to corrupted register transfers. The device does not support higher-speed modes such as SPI Mode 3 or dual-data-rate operation.
How many nonvolatile write cycles can the X9251TS24I-2.7 endure?
The X9251TS24I-2.7 guarantees 100,000 data changes per bit per register for its nonvolatile Data Registers. This endurance rating applies individually to each of the 4 DCPs × 4 registers × 8 bits = 128 bits. Each write to a Data Register consumes one cycle; volatile WCR writes do not affect endurance. Write time is 5–10ms per operation, as specified in the High-Voltage Write Cycle Timing table.
X9251TS24I-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):
- 100k
- 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)
X9251TS24I-2.7 FAQ
1.How can I place an order for X9251TS24I-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9251TS24I-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 X9251TS24I-2.7 reliable?
The price and inventory of X9251TS24I-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 X9251TS24I-2.7 is usually 5 days.
3.What payment methods are accepted for X9251TS24I-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9251TS24I-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9251TS24I-2.7?
X9251TS24I-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9251TS24I-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 X9251TS24I-2.7?
For technical support, including X9251TS24I-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9251TS24I-2.7 requirements.
6.How does Aetrix verify that X9251TS24I-2.7 is sourced from the original manufacturer or authorized distributors?
All X9251TS24I-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 X9251TS24I-2.7 meets industry standards.
7.What is the process for return or replacement of X9251TS24I-2.7?
All X9251TS24I-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X9251TS24I-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 X9251TS24I-2.7 part is unused and in its original packaging.
Return procedure for X9251TS24I-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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