Renesas X9258TV24Z-2.7

Overview

X9258TV24Z-2.7 from Intersil (now Renesas) is a quad digital potentiometer IC with 256-tap resolution per channel, dual ±2.7V to ±5.5V analog supplies, 2-wire I²C-compatible interface, and nonvolatile wiper position storage in 24-pin TSSOP package. It functions as four independent digitally controlled variable resistors for precision gain/offset trimming in low-noise analog signal paths.

For engineers reviewing the X9258TV24Z-2.7 datasheet, X9258TV24Z-2.7 pinout, X9258TV24Z-2.7 application, or X9258TV24Z-2.7 equivalent, key selection criteria include its 50kΩ end-to-end resistance, 40Ω typical wiper resistance at ±5V, <5µA standby current, and support for -40°C to +85°C industrial temperature operation.

Technical Context

The X9258TV24Z-2.7 integrates four independent resistor arrays-each with 255 segments and 256 tap points-controlled by volatile Wiper Counter Registers (WCR) and backed by four nonvolatile Data Registers (DR0–DR3) per channel. Its 2-wire serial interface uses open-drain SDA with pull-up and supports up to 400kHz clock frequency.

Each potentiometer operates with separate VH/RH, VL/RL, and VW/RW terminals, enabling three-terminal potentiometer or two-terminal rheostat configurations. Hardware write protection (WP) disables nonvolatile register writes, and power-up automatically loads DR0 into the WCR for deterministic startup behavior.

Key Specifications

Pinout & Package

24-pin TSSOP (4.4mm body width, MDP0044 package drawing), RoHS-compliant, moisture sensitivity level (MSL) 3 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42050-I/SL, the X9258TV24Z-2.7 uniquely delivers four independent bipolar-capable channels in one TSSOP package, eliminating external level shifters and reducing interconnect complexity in multi-sensor or multi-channel analog systems.

Availability

X9258TV24Z-2.7 is available at Aetrix Electronics and suitable for audio signal conditioning, sensor calibration, laser diode control, and medical instrument gain scaling requiring stable component supply and long-term lifecycle support.

Supply support for X9258TV24Z-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 analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The X9258 product line delivers digitally programmable precision analog components for systems requiring field-calibratable, nonvolatile, and low-noise resistor networks in compact packages.

FAQ

What is the maximum clock frequency supported by the X9258TV24Z-2.7 2-wire interface?

The X9258TV24Z-2.7 supports a maximum I²C-compatible clock frequency of 400kHz, with guaranteed timing parameters including tHIGH ≥600ns and tLOW ≥1300ns. This allows reliable communication with standard microcontrollers while maintaining noise immunity in electrically noisy industrial environments. The X9258TV24Z-2.7 does not support fast-mode plus (1MHz) or high-speed mode.

Does the X9258TV24Z-2.7 require external pull-up resistors on SDA and SCL lines?

Yes, the X9258TV24Z-2.7 requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a passive input. Typical values range from 1.8kΩ to 10kΩ depending on bus capacitance and speed; the datasheet provides calculation guidelines based on CBUS and VCC. Failure to install pull-ups will prevent I²C communication.

How does the X9258TV24Z-2.7 handle power supply sequencing between VCC, V+, and V−?

The X9258TV24Z-2.7 imposes no strict sequencing requirement: VCC, V+, and V− may power up in any order provided all three reach stable values within 1ms of each other. However, potentiometer pin voltages must always remain between V− and V+ to avoid damage. Wiper position recall from DR0 occurs only after all supplies stabilize.

Can the X9258TV24Z-2.7 be used as a two-terminal variable resistor?

Yes, the X9258TV24Z-2.7 can operate as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the wiper VW/RW, leaving the unused terminal open. This configuration is explicitly supported in the datasheet and maintains full 256-step resolution and nonvolatile storage, making it suitable for programmable current-limiting or LED brightness control.

What is the wiper response time after issuing a Write Wiper Counter Register command to the X9258TV24Z-2.7?

After issuing a Write Wiper Counter Register command, the X9258TV24Z-2.7 exhibits a wiper response time (tWRL) of 10µs maximum - the time required for the new wiper position to settle and produce stable output voltage. This applies to all load instructions including DR-to-WCR transfers and direct WCR writes, enabling real-time analog adjustments in closed-loop control systems.