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Renesas X9258US24IZT1
- Part No.:
- X9258US24IZT1
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X9258US24IZT1.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,806
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Product details
Overview
X9258US24IZT1 from Intersil (now Renesas) is a quad digital controlled potentiometer (XDCP™) integrating four independent 256-tap resistor arrays on a single CMOS IC. It functions as a digitally programmable three-terminal potentiometer or two-terminal variable resistor, with 2-wire (I²C-compatible) interface, nonvolatile wiper position storage, and dual ±5V analog supplies. Used in precision gain/offset trimming for instrumentation amplifiers and sensor signal conditioning circuits.
For engineers reviewing the X9258US24IZT1 datasheet, X9258US24IZT1 pinout, X9258US24IZT1 application, or X9258US24IZT1 equivalent, key selection criteria include its 50kΩ end-to-end resistance, -40°C to +85°C industrial temperature range, 24-lead SOIC package, 40Ω typical wiper resistance at ±5V, and support for hardware write protection via WP pin.
Technical Context
The X9258US24IZT1 implements four independent resistor arrays, each with 255 discrete segments and 256 tap points controlled by an 8-bit volatile Wiper Counter Register (WCR). Each array has dedicated VH/RH, VL/RL, and VW/RW terminals, enabling true three-terminal potentiometer operation or two-terminal rheostat configuration.
It uses a standard 2-wire serial interface with slave address 0101xxxx2, supports up to 16 devices on one bus via A0–A3 address pins, and features four nonvolatile data registers (DR0–DR3) per potentiometer for persistent wiper settings. Power-up automatically loads DR0 into the WCR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-end resistance | 50kΩ - defines maximum adjustable resistance range per potentiometer; matches common feedback network values in op-amp circuits. |
| Resolution | 0.4% - corresponds to 1/256 step size; enables fine-grained analog adjustment in calibration applications. |
| Wiper resistance | 40Ω typical @ V+ = 5V, V− = −5V - low on-resistance minimizes signal path error in precision voltage divider configurations. |
| Supply range | VCC = 2.7V to 5.5V; V+ = +2.7V to +5.5V; V− = −2.7V to −5.5V - supports bipolar analog signal conditioning with single or dual supply systems. |
| Nonvolatile endurance | 100,000 data changes per bit - ensures long-term reliability for field-programmable calibration storage across product lifetime. |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade embedded systems requiring stable performance across thermal extremes. |
| Interface | 2-wire (I²C-compatible) - enables direct connection to microcontrollers without protocol translation; supports up to 400kHz clock frequency. |
Pinout & Package
Package: 24-lead SOIC (300 mil), RoHS-compliant, Pb-free (e3 termination finish).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial clock input | Master-provided clock synchronizing all I²C read/write operations; requires external pull-up resistor. |
| SDA | Serial data bidirectional I/O | Open-drain interface supporting multi-device bus sharing; requires external pull-up resistor. |
| A0–A3 | Device address inputs | Set LSBs of 8-bit slave address (0101xxxx2); allow up to 16 X9258 devices on same bus. |
| VH0/RH0 – VH3/RH3 | Potentiometer high-side terminals | Connect to positive analog rail (V+) or signal source; define upper voltage boundary of each resistor array. |
| VL0/RL0 – VL3/RL3 | Potentiometer low-side terminals | Connect to negative analog rail (V−) or reference ground; define lower voltage boundary of each resistor array. |
| VW0/RW0 – VW3/RW3 | Wiper outputs | Provide adjustable output voltage/current; electrically equivalent to mechanical potentiometer wiper contact. |
| WP | Hardware write protect | Low-active pin disabling nonvolatile writes to DR0–DR3; prevents accidental calibration overwrite during operation. |
| V+, V− | Analog supply rails | Power the DCP resistor arrays and switches; support true bipolar operation (±5V typical). |
| VCC, VSS | Digital supply and ground | Power interface logic and control circuitry; independent from analog supplies for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent DCPs in one package | Reduces board space and BOM count vs. discrete potentiometers; enables matched tracking in multi-channel systems (e.g., quad amplifier gain control). |
| Nonvolatile data registers (4 per pot) | Preserves calibrated wiper positions across power cycles; eliminates need for host MCU to reprogram at startup. |
| Hardware write protection (WP pin) | Physically blocks DR writes without software intervention; critical for field-deployed equipment requiring tamper-resistant calibration. |
| 256-tap resolution with 0.4% step accuracy | Enables sub-1mV offset trimming in 10V full-scale sensor interfaces; meets precision requirements for medical and test equipment. |
| Standby current <5µA total | Supports battery-powered or energy-harvesting applications where ultra-low quiescent power is mandatory. |
Applications
| Instrumentation Amplifier Gain Control | Multi-Channel Sensor Offset Calibration |
|---|---|
|
Use Scenario: Adjusting feedback resistor ratio in a 3-op-amp instrumentation amplifier to set precise gain (e.g., ×10 to ×1000) for strain gauge or thermocouple front-ends. IC Role / Device Role / Timing Role: Quad potentiometer provides matched, digitally programmable gain-setting resistors for all four amplifier channels simultaneously. Use Value: Eliminates manual trimmer replacement; enables factory and field calibration via firmware; maintains channel-to-channel matching within ±0.6% relative linearity. |
Use Scenario: Compensating zero-point drift across four temperature sensors in an HVAC controller, where each sensor requires individual DC offset correction. IC Role / Device Role / Timing Role: Acts as four independent 2-terminal variable resistors in voltage-divider networks feeding op-amp summing junctions. Use Value: Stores unique calibration coefficients per sensor in nonvolatile DR0; survives power loss; supports automated calibration routines during manufacturing. |
| Programmable Reference Voltage Divider | Audio Channel Balance Control |
|
Use Scenario: Generating adjustable reference voltages (e.g., 0.5V to 4.5V) for ADCs or comparators in programmable power supply monitoring circuits. IC Role / Device Role / Timing Role: Functions as a three-terminal potentiometer with VH tied to V+, VL to V−, and VW delivering ratiometric output. Use Value: Delivers 0.4% resolution over full range; wiper resistance ≤40Ω avoids loading errors in high-impedance reference paths. |
Use Scenario: Implementing digital volume/balance control in a 4-channel audio mixer, where left/right channel pairs require independent attenuation. IC Role / Device Role / Timing Role: Configured as two-terminal rheostats in series with audio signal paths; wiper position sets attenuation level. Use Value: Supports smooth, glitch-free increment/decrement commands via I²C; avoids audible clicks during real-time adjustment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5204BRUZ10 | Quad 10kΩ pot; SPI interface; no bipolar V+/V− support; max 5.5V single supply only. | Requires level-shifting for bipolar signal paths; lacks hardware write protect pin. | Select when cost-sensitive designs use only unipolar supplies and SPI host interface is available. |
| MCP42050-I/P | Quad 50kΩ pot; SPI interface; single 2.7–5.5V supply; no V+/V− rails; 100kΩ end-to-end option only. | Cannot replace X9258US24IZT1 in ±5V analog sections; limited to unipolar operation. | Choose for legacy PIC-based systems with SPI peripherals and no bipolar analog requirements. |
Compared with AD5204BRUZ10 and MCP42050-I/P, the X9258US24IZT1 uniquely supports true bipolar analog operation (±5V), includes hardware write protection, and uses the simpler 2-wire interface-making it the only option for industrial sensor signal chains requiring robust, field-calibratable, dual-supply DCP functionality.
Availability
X9258US24IZT1 is available at Aetrix Electronics and suitable for industrial instrumentation, sensor calibration, and programmable power supply design requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for X9258US24IZT1 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 X9258 product line was designed for high-precision, field-programmable analog trimming in harsh environments-emphasizing nonvolatile storage, bipolar operation, and industrial temperature resilience.
FAQ
What is the absolute maximum voltage rating for the V+ and V− pins of the X9258US24IZT1?
The X9258US24IZT1 supports absolute maximum ratings of +10V on V+ and −10V on V−, with a maximum differential (V+ − V−) of 12V. These limits ensure safe operation during transient conditions, though recommended operating range remains ±5.5V. The X9258US24IZT1 must not be operated beyond these absolute maxima to prevent permanent damage to the internal resistor arrays or switches.
Does the X9258US24IZT1 support true bipolar analog signal paths?
Yes, the X9258US24IZT1 supports true bipolar operation via separate V+ and V− analog supply pins, allowing VH/RH terminals to swing up to +5.5V and VL/RL terminals down to −5.5V. This enables direct integration into ±5V op-amp circuits without level-shifting, unlike unipolar-only digital potentiometers. The X9258US24IZT1's resistor arrays and wiper switches are fully rated across this bipolar range.
How does the hardware write protect (WP) pin function on the X9258US24IZT1?
The WP pin on the X9258US24IZT1 is active-low: when pulled to VSS (GND), it disables all nonvolatile writes to the four data registers (DR0–DR3), preventing accidental overwrites of calibrated settings. Volatile WCR updates remain enabled. This feature is implemented in silicon-not firmware-so it remains effective even if the host MCU fails or resets. The X9258US24IZT1 ignores write-data instructions to DRs while WP is asserted.
What is the wiper response time after issuing a Write Wiper Counter Register command to the X9258US24IZT1?
After issuing a Write Wiper Counter Register command, the X9258US24IZT1 updates its wiper position within 10µs (tWRL), as specified in the DCP Timing table. This fast settling enables real-time closed-loop adjustments in servo or feedback control systems. The X9258US24IZT1 guarantees this timing across the full −40°C to +85°C operating range and under all valid supply conditions.
Can the X9258US24IZT1 be used as a two-terminal variable resistor (rheostat)?
Yes, the X9258US24IZT1 can be configured as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the wiper VW/RW terminal, leaving the other fixed terminal open or grounded. This configuration is explicitly supported in the datasheet and maintains full 256-step resolution and nonvolatile storage. In rheostat mode, the X9258US24IZT1 delivers 50kΩ maximum resistance with ≤40Ω wiper resistance at ±5V.
X9258US24IZT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 24-SOIC (0.295", 7.50mm 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:
- I2C
- 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:
- 24-SOIC
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 40
X9258US24IZT1 FAQ
1.How can I place an order for X9258US24IZT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9258US24IZT1 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 X9258US24IZT1 reliable?
The price and inventory of X9258US24IZT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9258US24IZT1 is usually 5 days.
3.What payment methods are accepted for X9258US24IZT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9258US24IZT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9258US24IZT1?
X9258US24IZT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9258US24IZT1 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 X9258US24IZT1?
For technical support, including X9258US24IZT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9258US24IZT1 requirements.
6.How does Aetrix verify that X9258US24IZT1 is sourced from the original manufacturer or authorized distributors?
All X9258US24IZT1 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 X9258US24IZT1 meets industry standards.
7.What is the process for return or replacement of X9258US24IZT1?
All X9258US24IZT1 units undergo pre-shipment inspection (PSI). If there is an issue with X9258US24IZT1, 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 X9258US24IZT1 part is unused and in its original packaging.
Return procedure for X9258US24IZT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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