Renesas X9258TS24Z-2.7T1

Overview

X9258TS24Z-2.7T1 from Renesas (formerly Intersil) is a quad digital controlled potentiometer (XDCP™) with 256 taps per channel, 100kΩ end-to-end resistance, dual ±2.7V to ±5.5V analog supplies (V+/V−), and 2-wire I²C-compatible serial interface. It integrates four independent volatile wiper counter registers and nonvolatile data registers for persistent wiper position storage, used in precision gain/offset trimming of op-amp circuits, sensor calibration, and programmable filter tuning.

For engineers reviewing the X9258TS24Z-2.7T1 datasheet, X9258TS24Z-2.7T1 pinout, X9258TS24Z-2.7T1 application, or X9258TS24Z-2.7T1 equivalent, key selection criteria include its 2.7V–5.5V VCC range, ±2.7V to ±5.5V analog rail support, 40Ω typical wiper resistance at ±5V, 100kΩ potentiometer value, and 24-pin SOIC package with hardware write-protect (WP) input.

Technical Context

The X9258TS24Z-2.7T1 implements four independent resistor arrays-each with 255 discrete segments and 256 tap points-controlled via an I²C-compatible 2-wire bus (SCL/SDA). Each array features dedicated VH/RH, VL/RL, and VW/RW terminals, enabling three-terminal potentiometer or two-terminal variable resistor configurations.

Its architecture includes four volatile 8-bit Wiper Counter Registers (WCRs), each mapped to one potentiometer, and four nonvolatile 8-bit Data Registers (DR0–DR3) per channel. Power-up automatically loads DR0 into the corresponding WCR. Nonvolatile writes require high-voltage enable via V+ and V− rails and take 5–10ms, with hardware write protection via the WP pin.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant, Pb-free (e3 termination).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ100 and MCP42050-I/P, the X9258TS24Z-2.7T1 uniquely supports true bipolar analog operation (±2.7V to ±5.5V), includes hardware write protection, and uses I²C - making it the only option among the three for robust, low-pin-count, field-calibratable bipolar signal conditioning.

Availability

X9258TS24Z-2.7T1 is available at Aetrix Electronics and suitable for audio gain control, instrumentation amplifier trimming, programmable filter tuning, and industrial sensor linearization requiring stable component supply and long-term calibration integrity.

Supply support for X9258TS24Z-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 Corporation (acquired Intersil in 2017) is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT markets.

The X9258 product line was designed specifically for high-reliability, nonvolatile analog parameter adjustment in harsh environments - emphasizing 100-year data retention, bipolar rail support, and hardware-protected configuration storage.

FAQ

What is the minimum VCC voltage required for reliable operation of the X9258TS24Z-2.7T1?

The X9258TS24Z-2.7T1 is rated for VCC from 2.7V to 5.5V. At 2.7V, all digital interface functions (I²C communication, register access, and wiper updates) operate reliably per datasheet specifications. Below 2.7V, functionality is not guaranteed and may result in communication failure or incomplete nonvolatile writes. The -2.7 suffix explicitly denotes this extended low-voltage capability versus standard 4.5V–5.5V variants.

Can the X9258TS24Z-2.7T1 be used with only a single positive supply (e.g., VCC = 3.3V, V+ = 3.3V, V− = 0V)?

No. The X9258TS24Z-2.7T1 requires both V+ and V− rails to be biased within their specified ranges (V+ = +2.7V to +5.5V, V− = −2.7V to −5.5V). Using V− = 0V violates the absolute maximum rating for V− (−10V min) and disables proper CMOS switch biasing in the resistor arrays. For unipolar applications, consider alternatives like the MCP42050 or AD5204.

How does the hardware write-protect (WP) pin function on the X9258TS24Z-2.7T1?

When the WP pin is driven LOW, all nonvolatile write operations (Write Data Register, XFR WCR→DR) are disabled - even if correct I²C commands and V+/V− voltages are present. This prevents accidental corruption of calibration data during power transitions or noise events. WP has no effect on volatile operations (Read/Write WCR, Increment/Decrement). The pin is active-low and internally pulled up; external pull-down is required to assert protection.

What is the wiper response time after issuing a Write Wiper Counter Register command to the X9258TS24Z-2.7T1?

After issuing a Write Wiper Counter Register command, the wiper voltage settles to its new position within 10µs (tWRL), as specified in the DCP Timing table. This delay is independent of VCC, V+, or V− levels within rated ranges and applies to all four potentiometers simultaneously. No additional wait state is required before measuring the updated analog output.

Does the X9258TS24Z-2.7T1 support standard I²C addressing and ACK protocols?

Yes. The X9258TS24Z-2.7T1 uses a fixed 4-bit device type identifier (0101) and 4-bit user-configurable address (A0–A3), forming a full 8-bit slave address compatible with standard I²C masters. It responds with ACK after address recognition and after each byte transfer (instruction or data), adhering to I²C timing requirements including tSU:DAT (100ns), tHD:DAT (30ns), and tAA (900ns).