Renesas X9250US24T1

Overview

X9250US24T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) integrating four 256-tap, 50kΩ resistor arrays with SPI serial interface, nonvolatile wiper position storage, and dual analog supplies (V+/V−). It operates from 2.7V to 5.5V VCC, delivers <5µA standby current, and supports precision voltage divider and variable resistor configurations in analog signal conditioning circuits.

For engineers reviewing the X9250US24T1 datasheet, X9250US24T1 pinout, X9250US24T1 application, or X9250US24T1 equivalent, key selection considerations include its 24-pin SOIC package, 0.4% resolution per pot, hardware write-protect (WP) pin, HOLD-enabled pause capability, and compatibility with industrial temperature range (−40°C to +85°C) when ordered as X9250US24I variants.

Technical Context

The X9250US24T1 implements four independent 255-segment 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 WCR write, DR-to-WCR transfer, or real-time increment/decrement using SI-driven clocked steps.

Its SPI interface complies with standard mode-0 timing (CPOL=0, CPHA=0), supports up to 2MHz SCK, and features tri-state SO/SI for bus sharing. The device requires VCC, V+, and V− supplies to stabilize within 1ms of each other; power-up automatically loads DR0 into each WCR, enabling deterministic startup behavior without host initialization.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant, Pb-free plus anneal option available. Pin pitch: 1.27mm. Body dimensions: 15.4mm × 7.5mm × 2.3mm (max).

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/P, the X9250US24T1 uniquely supports true bipolar analog operation via independent V+/V− supplies, provides hardware write protection, and offers HOLD-enabled SPI pausing - making it optimal for high-reliability industrial and test equipment requiring robust calibration persistence and flexible signal routing.

Availability

X9250US24T1 is available at Aetrix Electronics and suitable for programmable gain amplifiers, DC power supply regulation, audio level control, and comparator hysteresis tuning requiring stable component supply and long-term calibration integrity.

Supply support for X9250US24T1 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 manufacturer specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.

The X9250US24T1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability analog signal conditioning, calibration, and programmable bias applications.

FAQ

What is the operating temperature range for the X9250US24T1?

The X9250US24T1 is rated for commercial temperature range (0°C to +70°C) per its ordering suffix "US". For extended operation from −40°C to +85°C, the X9250US24I or X9250US24IZ variants must be selected. The X9250US24T1 itself does not support industrial temperature range.

Does the X9250US24T1 require external pull-up resistors on SPI lines?

No, the X9250US24T1 does not require external pull-ups on SI, SCK, or CS - its inputs meet standard CMOS logic thresholds (VIH = 0.7×VCC, VIL = 0.3×VCC). However, SO is tri-state and may need a pull-up if shared with other devices on a wired-OR bus configuration.

How many nonvolatile write cycles can the X9250US24T1 support per Data Register?

The X9250US24T1 guarantees 100,000 nonvolatile write cycles per bit in each of its four Data Registers (DR0–DR3). Each 8-bit register therefore supports ≥100,000 full register writes, with endurance validated per JEDEC standards and specified in the FN8165 datasheet.

Can the X9250US24T1 operate with only VCC and VSS, omitting V+ and V−?

No. The X9250US24T1 requires three independent supplies: VCC (digital logic), V+ (analog high rail), and V− (analog low rail). Omitting V+ or V− violates absolute maximum ratings and will prevent proper operation of the resistor arrays. Both analog rails must be present and within −5.5V to +5.5V relative to VSS.

What is the maximum SPI clock frequency supported by the X9250US24T1?

The X9250US24T1 supports SPI clock frequencies up to 2.0 MHz, as specified in the AC timing section of the FN8165 datasheet. At this rate, minimum clock high/low times are 200 ns each, and setup/hold times for SI, SCK, CS, and HOLD are 50 ns and 75 ns respectively.