Renesas X9258TV24IZ-2.7

Overview

X9258TV24IZ-2.7 from Intersil is a quad digital controlled potentiometer (XDCP™) with 256-tap resolution per channel, 2-wire I²C-compatible interface, ±2.7V to ±5.5V dual analog supply range, and nonvolatile wiper position storage in four 8-bit data registers per potentiometer. It operates across –40°C to +85°C and is used for precision gain/offset trimming in instrumentation amplifiers and programmable filter tuning.

For engineers reviewing the X9258TV24IZ-2.7 datasheet, X9258TV24IZ-2.7 pinout, X9258TV24IZ-2.7 application, or X9258TV24IZ-2.7 equivalent, key selection criteria include dual-supply analog rail support (V+/V−), TSSOP-24 package footprint, 40Ω typical wiper resistance at ±5V, 100-year nonvolatile data retention, and hardware write-protection via WP pin.

Technical Context

The X9258TV24IZ-2.7 integrates four independent 255-segment resistor arrays, each with an 8-bit volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers (DR0–DR3). Wiper position is set via I²C commands including direct WCR write, DR-to-WCR transfer, or real-time increment/decrement using SCL edge-triggered logic.

It supports full 2-wire bus operation with slave address configuration via A0–A3 pins, ACK polling during nonvolatile writes (tWR = 5–10 ms), and hardware write protection via active-low WP pin. Power-up automatically loads DR0 into each WCR, enabling deterministic startup behavior without host initialization.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm width), RoHS-compliant, moisture sensitivity level (MSL) 3 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital potentiometer applications.

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9258TV24IZ-2.7 uniquely supports true bipolar analog operation (±2.7V to ±5.5V), retains calibrated settings for 100 years, and provides hardware write protection-making it the only option for safety-critical or field-calibrated industrial instrumentation.

Availability

X9258TV24IZ-2.7 is available at Aetrix Electronics and suitable for instrumentation amplifier calibration, programmable audio filter design, medical sensor signal conditioning, and industrial temperature transmitter applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9258TV24IZ-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

Intersil (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, aerospace, and medical applications.

The X9258 product line delivers digitally programmable analog components with nonvolatile calibration storage, targeting high-reliability systems where mechanical potentiometer replacement and field recalibration are critical requirements.

FAQ

What is the minimum analog supply voltage supported by the X9258TV24IZ-2.7?

The X9258TV24IZ-2.7 supports analog supply rails from ±2.7V to ±5.5V. This means V+ must be ≥ +2.7V and V− must be ≤ –2.7V, with a maximum differential of 12V between them. Operation below ±2.7V is not guaranteed and may result in degraded linearity or failure to retain wiper position.

Does the X9258TV24IZ-2.7 require external pull-up resistors on the I²C bus?

Yes, the X9258TV24IZ-2.7 requires external pull-up resistors on both SCL and SDA lines because its SDA pin is open-drain. Typical values range from 1.8kΩ to 10kΩ depending on bus capacitance and speed; the datasheet recommends calculating based on tR/tF timing limits and CBUS load.

How does the hardware write protect (WP) pin function on the X9258TV24IZ-2.7?

When the WP pin is driven LOW, the X9258TV24IZ-2.7 blocks all nonvolatile writes to its Data Registers (DR0–DR3). Volatile WCR updates remain enabled. This prevents accidental overwrites during power transitions or firmware glitches, ensuring calibration integrity remains intact across system resets.

Can the X9258TV24IZ-2.7 operate with only a single supply voltage?

No-the X9258TV24IZ-2.7 requires three independent supplies: VCC (digital logic), V+ (positive analog rail), and V− (negative analog rail). It cannot function with only VCC and ground; V+ and V− must be supplied even if one is grounded, though grounding V− while applying +5V to V+ violates the ±2.7V specification and risks damage.

What happens to the wiper position of the X9258TV24IZ-2.7 after power cycling?

On power-up, the X9258TV24IZ-2.7 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding Wiper Counter Register (WCR). This ensures repeatable startup behavior without host intervention, provided DR0 was previously programmed with the desired calibration value.