Renesas X9259US24Z-2.7T1

Overview

X9259US24Z-2.7T1 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, and 2.7V–5.5V single-supply operation. It integrates four independent DCPs for precision analog trimming in voltage amplifier gain control, sensor signal conditioning, and DC bias adjustment.

For engineers reviewing the X9259US24Z-2.7T1 datasheet, X9259US24Z-2.7T1 pinout, X9259US24Z-2.7T1 application, or X9259US24Z-2.7T1 equivalent, key selection criteria include its 2.7V minimum VCC, nonvolatile data register storage (100-year retention), wiper resistance ≤300Ω at 3V, and SOIC-24 package compatibility with industrial temperature range (0°C to +70°C).

Technical Context

The X9259US24Z-2.7T1 implements four independent resistor arrays using CMOS switch networks, each controlled by an 8-bit volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers (DR00–DR33). Wiper position is updated via 2-wire bus commands including Write/Read WCR, Write/Read DR, and XFR operations between registers.

It supports hardware write protection (WP pin active-low), device addressing via A0–A3 pins (up to 16 devices on one bus), and incremental/decremental wiper control synchronized to SCL edges. Standby current is <5µA, and nonvolatile writes require high-voltage timing (tWR = 5–10ms).

Key Specifications

Pinout & Package

Package: 24-lead SOIC (RoHS-compliant, M24.3 drawing), body size 15.4mm × 7.5mm × 2.3mm, standard JEDEC MS-013 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/P, the X9259US24Z-2.7T1 offers unique quad-channel integration, hardware write protection, and four nonvolatile registers per channel-making it optimal for multi-parameter calibration systems where layout density and configuration persistence are critical.

Availability

X9259US24Z-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, audio system tuning, and power supply feedback loop trimming requiring stable component supply and long-lifecycle support.

Supply support for X9259US24Z-2.7T1 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 analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The X9259 product line delivers digitally programmable analog front-ends for precision calibration and real-time parameter adjustment in embedded systems requiring nonvolatile configuration storage and low-voltage operation.

FAQ

What is the minimum operating voltage for the X9259US24Z-2.7T1?

The X9259US24Z-2.7T1 operates down to 2.7V, as confirmed by the "X9259-2.7" designation in the ordering table and Absolute Maximum Ratings section. This allows direct interfacing with 3.3V and lower-voltage microcontrollers without level translation. At 2.7V, wiper resistance increases to ≤300Ω and nonvolatile write time remains within 10ms specification. The X9259US24Z-2.7T1 maintains full 256-tap functionality across its entire 2.7V–5.5V range.

Does the X9259US24Z-2.7T1 retain wiper settings after power loss?

Yes-the X9259US24Z-2.7T1 automatically loads the contents of DR00–DR30 into WCR0–WCR3 at power-up, ensuring repeatable analog behavior. While the volatile Wiper Counter Registers (WCRs) lose state on power-down, the four nonvolatile Data Registers per DCP retain values for 100 years. This enables factory calibration storage and eliminates need for host MCU re-initialization. The X9259US24Z-2.7T1 supports both immediate volatile updates and persistent nonvolatile saves via distinct instruction sets.

How many independent potentiometers does the X9259US24Z-2.7T1 integrate?

The X9259US24Z-2.7T1 integrates four fully independent digitally controlled potentiometers (DCPs) on a single monolithic CMOS die. Each DCP has dedicated RH, RL, and RW pins, plus its own Wiper Counter Register and four nonvolatile Data Registers. They share only the 2-wire bus interface and power rails-no crosstalk or shared control logic. This quad architecture reduces component count versus discrete DCP solutions and simplifies PCB routing for multi-channel analog calibration. The X9259US24Z-2.7T1 is explicitly described as "quad" in its datasheet title and functional diagram.

What package type is used for the X9259US24Z-2.7T1?

The X9259US24Z-2.7T1 uses a 24-lead SOIC package (RoHS-compliant, JEDEC MS-013 outline, package drawing M24.3), measuring 15.4mm × 7.5mm × 2.3mm. This surface-mount package features gull-wing leads, standard pitch (1.27mm), and is compatible with automated assembly processes. The "US" in the part number denotes SOIC; "UV" would indicate TSSOP. The "T1" suffix confirms tape-and-reel packaging for SMT placement. The X9259US24Z-2.7T1's SOIC-24 footprint is documented in Pin Configuration (Page 3) and Ordering Information (Page 2) of FN8169 Rev 6.00.

Can the X9259US24Z-2.7T1 be used as a two-terminal variable resistor?

Yes-the X9259US24Z-2.7T1 supports both three-terminal potentiometer and two-terminal variable resistor configurations. In two-terminal mode, either RH or RL is tied to the wiper (RW), effectively creating a digitally adjustable resistance between RW and the remaining terminal. Datasheet Section 1 states: "The XDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor." This flexibility enables use in current-limiting, gain-setting, and bias-adjustment circuits where only one adjustable node is required. The X9259US24Z-2.7T1's 50kΩ total resistance and ≤300Ω wiper resistance ensure predictable performance in either topology.