Renesas X9259US24Z-2.7

Overview

X9259US24Z-2.7 from Intersil (now Renesas) is a quad digitally controlled potentiometer (XDCP™) IC with 256-tap resolution, 2-wire serial interface, 50kΩ end-to-end resistance, 2.7V–5.5V single-supply operation, and nonvolatile data register storage-used for precision gain control in voltage amplifiers and DC bias trimming in sensor signal conditioning circuits.

For engineers reviewing the X9259US24Z-2.7 datasheet, X9259US24Z-2.7 pinout, X9259US24Z-2.7 application, or X9259US24Z-2.7 equivalent, this device supports volatile wiper position control and nonvolatile storage of four independent 8-bit settings per potentiometer, enabling repeatable power-up behavior and system-level calibration without external memory.

Technical Context

The X9259US24Z-2.7 integrates four independent DCP cores on a monolithic CMOS die, each with RH/RL/RW terminals, an 8-bit volatile Wiper Counter Register (WCR), and four 8-bit nonvolatile Data Registers (DR00–DR33). Wiper position is set via 2-wire bus commands including Write WCR, Read DR, and XFR DR→WCR.

It operates as a slave-only 2-wire device with address pins A3–A0 defining one of 16 possible slave addresses; hardware write protection (WP) disables nonvolatile writes when asserted low; standby current is <5µA; and wiper resistance is 300Ω at 3V and 220Ω at 5V.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (M24.3), RoHS-compliant, surface-mount. Pin count and layout match industry-standard 24L SOIC footprint with 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP41HV51-502, the X9259US24Z-2.7 uniquely combines quad-channel integration, 2-wire simplicity, hardware write protection, and guaranteed power-up recall from nonvolatile DR0x registers-making it optimal for compact, calibration-critical embedded systems with limited MCU GPIO resources.

Availability

X9259US24Z-2.7 is available at Aetrix Electronics and suitable for audio gain control, DC bias trimming, voltage regulator setpoint adjustment, and sensor signal conditioning requiring stable component supply and long-term calibration integrity.

Supply support for X9259US24Z-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

Renesas Electronics (formerly Intersil) is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for industrial, automotive, and communications markets.

The X9259 product line delivers digitally programmable analog functions-including quad DCPs with nonvolatile storage-to replace mechanical potentiometers in calibration-sensitive, space-constrained embedded systems.

FAQ

What is the operating voltage range specified for the X9259US24Z-2.7?

The X9259US24Z-2.7 is rated for 2.7V to 5.5V single-supply operation. This extended low-voltage capability distinguishes it from the standard X9259 (5V ±10%) and enables direct compatibility with 3.3V and Li-ion battery-powered systems without level-shifting. The device maintains full functionality-including 256-tap resolution and nonvolatile write-across this entire range.

How does the X9259US24Z-2.7 handle power-up initialization?

At power-up, the X9259US24Z-2.7 automatically loads the contents of DR00, DR10, DR20, and DR30 into the corresponding Wiper Counter Registers (WCR0–WCR3), establishing a known analog state without host intervention. This behavior is guaranteed by internal power-on reset circuitry and requires no software initialization sequence-critical for fail-safe operation in unattended equipment.

Can the X9259US24Z-2.7 be used as both a potentiometer and a variable resistor?

Yes, the X9259US24Z-2.7 supports both configurations: as a three-terminal potentiometer (RH–RW–RL) for voltage division, and as a two-terminal variable resistor (RW–RH or RW–RL) for current-limiting or gain-setting applications. Its 50kΩ end-to-end resistance and 300Ω typical wiper resistance ensure predictable performance in either topology without external compensation.

What is the endurance specification for nonvolatile register writes in the X9259US24Z-2.7?

The X9259US24Z-2.7 guarantees 100,000 data changes per bit per register for its nonvolatile Data Registers. Each write cycle takes up to 10ms to complete, and the device ignores further bus activity during this time. This endurance rating supports decades of field recalibration in industrial sensors and medical devices where periodic calibration updates are required.

Does the X9259US24Z-2.7 require external pull-up resistors on its 2-wire interface lines?

Yes, the SDA pin of the X9259US24Z-2.7 is open-drain and requires an external pull-up resistor to VCC; SCL is a CMOS input and also benefits from a pull-up for noise immunity. Typical values are 2.2kΩ to 10kΩ depending on bus capacitance and speed-400kHz operation is supported with ≤400pF total bus capacitance. No pull-downs are permitted on either line.