Renesas X9250TV24I

Overview

X9250TV24I from Intersil is a quad digitally controlled potentiometer (XDCP™) IC with SPI interface, 256-tap resolution per channel, ±20% end-to-end resistance tolerance, and dual analog supply capability (V+ = −5.5V to −2.7V, V− = +2.7V to +5.5V). It integrates four independent 100kΩ resistor arrays in a single 24-lead TSSOP package and supports nonvolatile wiper position storage for industrial-grade parameter tuning in analog signal paths.

For engineers reviewing the X9250TV24I datasheet, X9250TV24I pinout, X9250TV24I application, or X9250TV24I equivalent, this device serves as a precision replacement for mechanical potentiometers in voltage divider, gain control, offset adjustment, and programmable filter configurations-requiring verified SPI timing compliance, wiper resistance ≤250Ω, and 100-year data retention across −40°C to +85°C.

Technical Context

The X9250TV24I implements four independent 255-segment CMOS resistor arrays, each controlled by an 8-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). Wiper position is updated via SPI commands including direct write, register transfer, or increment/decrement modes-with tWRL ≤10µs response latency after instruction issuance.

Its dual-supply architecture separates digital logic (VCC/VSS) from analog sections (V+/V−), enabling bipolar operation with VH/RH referenced to V+ and VL/RL referenced to V−. The hardware write-protect (WP) pin disables nonvolatile writes, while HOLD allows pausing ongoing SPI sequences without reset-both critical for robust embedded system integration.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm body width, MDP0044 footprint).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9250TV24I uniquely supports bipolar analog operation via dedicated V+/V− supplies and guarantees 100-year nonvolatile data retention-making it the only option among the three for maintenance-free, field-deployed instrumentation requiring long-term calibration stability and true AC signal handling.

Availability

X9250TV24I is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable power supply feedback networks, and audio signal processing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9250TV24I 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 communications markets.

The X9250TV24I belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability analog systems where long-term calibration stability, SPI configurability, and bipolar operation are mandatory.

FAQ

What is the maximum SPI clock frequency supported by the X9250TV24I?

The X9250TV24I supports a maximum SPI clock frequency of 2.0 MHz, as specified in its AC timing characteristics. This limit ensures reliable setup/hold timing for SI, SCK, CS, and HOLD signals under all operating conditions. Exceeding 2 MHz may cause command misreads or incomplete register transfers. The X9250TV24I uses standard SPI mode 0 (CPOL=0, CPHA=0) with data latched on the rising SCK edge and output on the falling edge.

Does the X9250TV24I retain wiper settings after power cycling?

Yes, the X9250TV24I retains wiper settings after power cycling via its nonvolatile Data Registers. Upon power-up, the contents of DR0 are automatically loaded into the Wiper Counter Register (WCR) for each potentiometer. This behavior is guaranteed for 100 years under specified temperature and voltage conditions. The X9250TV24I requires all three supplies (VCC, V+, V−) to stabilize before recall completes, with tPUW ≤5 ms from final supply stability to first valid write.

Can the X9250TV24I operate with bipolar analog signals?

Yes, the X9250TV24I supports true bipolar analog operation using separate V+ (−5.5V to −2.7V) and V− (+2.7V to +5.5V) supplies. This allows VH/RH terminals to be referenced to V+ and VL/RL to V−, enabling symmetric ±5.5V signal swings across each potentiometer array. Unlike unipolar DCPs, the X9250TV24I maintains linearity and wiper resistance specs across the full bipolar range without external level-shifting circuitry.

How many devices can share the same SPI bus with the X9250TV24I?

Up to four X9250TV24I devices can share the same SPI bus using the A0 and A1 address pins. These two inputs set the two least-significant bits of the 8-bit slave address, allowing unique identification within a multi-drop configuration. Each device must have a distinct A0/A1 combination (00, 01, 10, or 11); tying both to VCC or VSS is permitted. The device type identifier (0101) occupies the four MSBs, ensuring no conflict with other SPI peripherals.

What is the purpose of the HOLD pin on the X9250TV24I?

The HOLD pin on the X9250TV24I pauses an active SPI transaction without resetting internal state or requiring reinitialization. To pause, HOLD must be driven LOW while SCK is LOW; to resume, it is returned HIGH-also while SCK is LOW. This feature enables microcontrollers to service higher-priority interrupts mid-transaction and guarantees bit-perfect resumption. If unused, HOLD must be tied HIGH to avoid unintended pauses that could stall communication.