Renesas X9250TS24T1

Overview

X9250TS24T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution per channel, SPI serial interface, dual ±2.7V to ±5.5V analog supplies (V+/V−), and 100kΩ end-to-end resistance. It integrates nonvolatile data registers (DR0–DR3), wiper counter registers (WCR), and hardware write protection (WP) for precision analog control in mixed-signal systems.

For engineers reviewing the X9250TS24T1 datasheet, X9250TS24T1 pinout, X9250TS24T1 application, or X9250TS24T1 equivalent, key selection considerations include its 24-pin TSSOP package, 2.7V–5.5V VCC range, 40Ω typical wiper resistance at 5V, <5µA standby current, and support for four independent potentiometer configurations with nonvolatile wiper position storage.

Technical Context

The X9250TS24T1 implements four independent 255-segment resistor arrays with CMOS-switched wipers controlled by 8-bit Wiper Counter Registers. Each array supports three-terminal potentiometer or two-terminal variable resistor operation, with wiper position updated via SPI commands including direct WCR load, DR-to-WCR transfer, and increment/decrement modes.

Its SPI interface complies with standard mode-0 timing (CPOL=0, CPHA=0), supports up to 2MHz clock frequency, and includes HOLD and chip-select (CS) for multi-device bus management. Nonvolatile writes require high-voltage internal programming cycles (5–10ms), while volatile wiper updates occur within 10µs after instruction completion.

Key Specifications

Pinout & Package

24-pin Thin Shrink Small Outline Package (TSSOP), 4.4mm body width, RoHS-compliant Pb-free finish (MDP0044 drawing). Pin 1 marked with dot; pin count matches SOIC variant but with reduced footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ100 and MCP42050-I/SL, the X9250TS24T1 uniquely provides four independent nonvolatile data registers per potentiometer, enabling robust field calibration, multi-point trimming, and guaranteed power-up repeatability - critical for industrial and medical equipment requiring traceable configuration history.

Availability

X9250TS24T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device analog front-ends, and telecom line-card bias control requiring stable component supply and long-term configuration retention.

Supply support for X9250TS24T1 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 high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9250 product line was designed for digitally programmable analog signal conditioning in space-constrained, reliability-critical systems - delivering nonvolatile precision where mechanical potentiometers fail due to wear or environmental stress.

FAQ

What is the operating voltage range for the analog supplies of the X9250TS24T1?

The X9250TS24T1 supports analog supplies V+ = +2.7V to +5.5V and V− = −2.7V to −5.5V, enabling true bipolar operation across its resistor arrays. This allows use in AC-coupled signal paths, dual-supply op-amps, and precision offset adjustment circuits where signals swing above and below ground. The digital VCC supply operates independently from 2.7V to 5.5V.

How does the X9250TS24T1 store wiper position across power cycles?

The X9250TS24T1 stores wiper position using four nonvolatile Data Registers (DR0–DR3) per potentiometer. On power-up, DR0 automatically loads into the volatile Wiper Counter Register (WCR), restoring the last saved setting. Nonvolatile writes to DR registers require explicit SPI commands and complete in 5–10ms; WP pin must be HIGH to enable these writes.

Can the X9250TS24T1 be used as a two-terminal variable resistor?

Yes, the X9250TS24T1 can operate as a two-terminal variable resistor by connecting either VH or VL to the circuit node and using VW as the adjustable terminal, leaving the other fixed terminal unconnected or tied to a rail. This configuration is commonly used in current-limiting, LED brightness control, and programmable load applications where only resistance variation-not voltage division-is required.

What is the maximum SPI clock frequency supported by the X9250TS24T1?

The X9250TS24T1 supports SPI clock frequencies up to 2.0MHz under standard operating conditions. Timing parameters such as tSU (50ns setup), tH (75ns hold), and tCYC (500ns cycle time) are specified to ensure reliable communication. For robust noise immunity in industrial environments, operation at ≤1MHz is recommended, especially with longer PCB traces or unshielded cables.

Does the X9250TS24T1 require specific power supply sequencing?

No, the X9250TS24T1 has no strict power supply sequencing requirement. VCC, V+, and V− may ramp in any order, provided all three reach final values within 1ms of each other. However, wiper position recall from nonvolatile memory is only active once all supplies are stable. Voltage on any potentiometer pin (VH, VL, VW) must remain strictly between V− and V+ at all times to avoid latch-up or damage.