Renesas X9408YV24IZ-2.7T1

Overview

X9408YV24IZ-2.7T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 64-tap resistor arrays per channel, 2-wire I²C-compatible interface, and dual ±2.7V to ±5.5V analog supplies (V+/V−). It integrates four independent volatile wiper counter registers and sixteen nonvolatile data registers (four per pot), enabling precise digital adjustment of analog signal paths in audio, sensor biasing, and power supply trimming applications.

For engineers reviewing the X9408YV24IZ-2.7T1 datasheet, X9408YV24IZ-2.7T1 pinout, X9408YV24IZ-2.7T1 application, or X9408YV24IZ-2.7T1 equivalent, this device supports industrial temperature operation (−40°C to +85°C), Pb-free TSSOP-24 packaging, and hardware write protection via the WP pin - critical for field-reprogrammable analog calibration systems requiring long-term parameter retention.

Technical Context

The X9408YV24IZ-2.7T1 implements four independent 6-bit wiper counter registers controlling 63-resistor-segment arrays, each configurable as a three-terminal potentiometer or two-terminal variable resistor. Its 2-wire serial interface uses open-drain SDA with SCL clocking, supporting up to 16 devices on one bus via A0–A3 address inputs.

Each potentiometer features four nonvolatile data registers (6-bit each) with 100-year data retention and 100,000 write cycles. Power-up loads DR0 into the WCR; nonvolatile writes require V+ and V− applied before VCC, with tPUW = 5 ms minimum delay before write initiation.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), Pb-free (RoHS compliant), tape-and-reel (T1 suffix).

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 X9408YV24IZ-2.7T1 delivers integrated quad-channel control, bipolar analog operation, and guaranteed DR0 recall - reducing component count and eliminating boot-time host intervention in industrial calibration systems.

Availability

X9408YV24IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, audio equipment manufacturing, programmable power supply design, and PLC analog I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9408YV24IZ-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

Intersil (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9408 product line was designed for digitally reconfigurable analog signal conditioning - targeting applications demanding nonvolatile calibration storage, multi-channel synchronization, and robust operation under varying thermal and supply conditions.

FAQ

What is the power-up behavior of the X9408YV24IZ-2.7T1?

The X9408YV24IZ-2.7T1 automatically loads the contents of Data Register 0 (DR0) into each wiper counter register (WCR) upon power-up, ensuring a known analog state without host intervention. This requires correct power sequencing: V− first, then VCC and V+, with all supplies stable before applying signals to VH/VL/VW pins. The tPUW specification mandates a 5 ms delay before issuing nonvolatile write commands.

Does the X9408YV24IZ-2.7T1 support true bipolar operation?

Yes, the X9408YV24IZ-2.7T1 supports true bipolar analog operation via dedicated V+ and V− pins rated from ±2.7V to ±5.5V. This allows the resistor arrays to handle signals swinging fully between these rails - unlike unipolar DCPs - making it suitable for AC-coupled audio paths, op-amp level-shifting, and sensor front-ends requiring negative bias voltages.

How does the hardware write protect (WP) pin function on the X9408YV24IZ-2.7T1?

The WP pin on the X9408YV24IZ-2.7T1 is active-low: when held LOW, it disables all nonvolatile writes to the data registers, preventing accidental overwrites of factory-calibrated values. During normal operation, WP can be tied HIGH or driven by a microcontroller GPIO. The pin has no effect on volatile WCR updates or read operations - only EEPROM-style storage is blocked.

What is the maximum clock frequency supported by the 2-wire interface of the X9408YV24IZ-2.7T1?

The X9408YV24IZ-2.7T1 supports a maximum SCL clock frequency of 400 kHz, compliant with standard-mode I²C. Timing parameters including tHIGH (600 ns min), tLOW (1300 ns min), and tSU:DAT (100 ns min) are specified over the full industrial temperature range. Pull-up resistor values must be selected per bus capacitance to meet rise/fall time requirements (tR/tF ≤ 300 ns).

Can the X9408YV24IZ-2.7T1 be used as a two-terminal variable resistor?

Yes, the X9408YV24IZ-2.7T1 can be configured as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the wiper VW/RW, leaving the other terminal unconnected or grounded. This mode is explicitly supported in the datasheet and maintains the same 64-step resolution and nonvolatile storage capability - commonly used for programmable current limiting or LED brightness control.