Renesas X9408YV24-2.7

Overview

X9408YV24-2.7 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 64-tap resistor arrays per channel, 2-wire I²C-compatible interface, 2.5kΩ end-to-end resistance, and operation from 2.7V to 5.5V VCC. It integrates volatile wiper counter registers and four nonvolatile data registers per pot, enabling precise analog parameter adjustment in mixed-signal systems.

For engineers reviewing the X9408YV24-2.7 datasheet, X9408YV24-2.7 pinout, X9408YV24-2.7 application, or X9408YV24-2.7 equivalent, key selection criteria include its TSSOP-24 package, ±2.7V to ±5.5V analog supply range (V+/V−), 100,000-cycle endurance, 100-year data retention, and hardware write-protect (WP) functionality for register integrity.

Technical Context

The X9408YV24-2.7 implements four independent 63-element resistor arrays with CMOS-switched wiper terminals, each controlled by a 6-bit volatile Wiper Counter Register (WCR). Wiper position is set via direct write, register transfer, or real-time increment/decrement using SCL clock edges while holding SDA high/low.

It uses a fixed 0101b device-type identifier on the 2-wire bus, with A0–A3 pins selecting one of 16 possible slave addresses. Nonvolatile writes to Data Registers require high-voltage timing (tWR = 5–10 ms), and power-up automatically loads DR0 into each WCR - contingent on proper V−/VCC/V+ sequencing.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm wide), RoHS-compliant, Pb-free (e3 termination).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9408YV24-2.7 uniquely delivers bipolar analog operation, hardware write protection, and guaranteed 100-year data retention - making it the only option for safety-critical, field-deployed calibration systems requiring tamper-resistant, long-term analog configuration storage.

Availability

X9408YV24-2.7 is available at Aetrix Electronics and suitable for audio signal conditioning, laser diode biasing, industrial sensor calibration, and medical instrument gain setting requiring stable component supply and long-term configuration integrity.

Supply support for X9408YV24-2.7 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

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

The X9408 family was designed for high-reliability analog parameter control in systems requiring nonvolatile configuration storage, bipolar signal handling, and robust I²C-based digital adjustment - targeting test equipment, medical devices, and telecom infrastructure.

FAQ

What is the absolute maximum V+ and V− rating for X9408YV24-2.7?

The absolute maximum ratings specify V+ up to +10V and V− down to −10V, with a maximum differential of 12V between them. However, the recommended operating range for X9408YV24-2.7 is ±2.7V to ±5.5V. Exceeding these limits risks permanent damage to the internal resistor arrays and switch transistors, and violates the device's qualified operating conditions defined in FN8191 Rev.4.00.

Does X9408YV24-2.7 support true I²C bus compliance including ACK polling?

Yes, X9408YV24-2.7 fully supports standard I²C protocol features including start/stop conditions, 7-bit addressing with 0101b prefix, and acknowledge polling during nonvolatile write cycles. After issuing a Write Data Register command, the host can immediately poll using START + slave address; absence of ACK indicates ongoing tWR (5–10 ms), while ACK confirms completion - enabling deterministic firmware timing without fixed delays.

How does the WP pin affect operation of X9408YV24-2.7?

The WP pin on X9408YV24-2.7 is an active-low hardware lock that disables all nonvolatile writes to the four Data Registers per potentiometer. When WP is held HIGH, commands like Write Data Register or XFR WCR to DR are ignored - preserving factory or field-calibrated settings against accidental overwrite. Volatile operations (e.g., Write WCR, Increment/Decrement) remain fully functional regardless of WP state.

Can X9408YV24-2.7 be used as a two-terminal variable resistor?

Yes, X9408YV24-2.7 supports two-terminal variable resistor configuration by connecting either VH/RH or VL/RL to VW/RW, leaving the unused terminal open or tied to a fixed potential. This mode is explicitly supported in the datasheet and maintains full 64-step resolution and nonvolatile storage capability. Wiper resistance (40Ω typ. at 5V) directly impacts minimum achievable resistance and must be accounted for in low-R design.

What is the power-up sequencing requirement for reliable DR0 recall in X9408YV24-2.7?

X9408YV24-2.7 requires strict power-up sequencing: V− must be applied first, followed by VCC and V+, then analog pins (VH/VL/VW). The VCC ramp rate must be 0.2–50 V/msec, and VCC must remain below 0.1V for >1 second after power-down to ensure clean DR0 reload. Failure to follow this sequence may result in undefined wiper positions or failure to restore default settings on power-up.