Renesas X9418WV24IZ-2.7

Overview

X9418WV24IZ-2.7 from Intersil is a dual digitally controlled potentiometer (XDCP™) with 2-wire serial interface, 64-tap resolution per pot, ±2.7V to ±5.5V analog supply range, and 10kΩ end-to-end resistance. It operates across -40°C to +85°C in a Pb-free 24-lead TSSOP package and is used for precision voltage divider and variable resistor functions in programmable power supplies and sensor calibration circuits.

For engineers reviewing the X9418WV24IZ-2.7 datasheet, X9418WV24IZ-2.7 pinout, X9418WV24IZ-2.7 application, or X9418WV24IZ-2.7 equivalent, key selection criteria include dual-potentiometer integration, nonvolatile wiper position storage (DR0–DR3), hardware write protection (WP), 2.7V–5.5V VCC compatibility, and support for bidirectional 2-wire bus timing up to 400kHz.

Technical Context

The X9418WV24IZ-2.7 implements two independent 63-segment resistor arrays with CMOS-switched wipers controlled by volatile 6-bit Wiper Counter Registers (WCR). Each potentiometer features four nonvolatile 6-bit Data Registers (DR0–DR3) for storing wiper positions or system parameters, with automatic DR0→WCR load at power-up.

It uses a register-oriented 2-wire interface supporting nine instructions-including Read/Write WCR, Read/Write DR, transfer between DR and WCR, global transfers, and increment/decrement-with ACK polling for nonvolatile write completion. The WP pin disables nonvolatile writes when low, and address pins A0–A3 enable up to 16 devices on one bus.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm width), RoHS-compliant Pb-free finish, MDP0044 drawing.

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/SL, X9418WV24IZ-2.7 uniquely delivers dual 64-tap pots with independent ±2.7V to ±5.5V analog supplies in a single 24-lead TSSOP-making it the only option for compact, bipolar, I²C-controlled trimming in space-constrained industrial analog front-ends.

Availability

X9418WV24IZ-2.7 is available at Aetrix Electronics and suitable for programmable power supplies, sensor calibration systems, audio gain stages, and comparator hysteresis networks requiring stable component supply and long-term configuration retention.

Supply support for X9418WV24IZ-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 Corporation, now part of Renesas Electronics, designs high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.

The X9418 product line delivers digitally controlled potentiometers optimized for precision analog trimming in battery-powered and industrial environments-emphasizing nonvolatile storage, low power, and robust 2-wire interface operation.

FAQ

What is the absolute maximum voltage rating on the VH0/RH0 pin of the X9418WV24IZ-2.7?

The absolute maximum voltage on any VH/RH, VL/RL, or VW/RW pin is specified as V− to V+. For X9418WV24IZ-2.7, V− ranges from −5.5V to −2.7V and V+ from +2.7V to +5.5V, so the pin can withstand −5.5V to +5.5V relative to VSS. Exceeding these limits risks permanent damage per Absolute Maximum Ratings on page 11 of FN8194 Rev 2.00. Always ensure applied voltages stay within this window during operation and power sequencing.

Does the X9418WV24IZ-2.7 support true 2-wire (I²C) communication with standard bus timing?

Yes, X9418WV24IZ-2.7 fully complies with standard 2-wire (I²C) timing: fSCL up to 400kHz, tHIGH ≥600ns, tLOW ≥1300ns, and tSU:STA/tHD:STA ≥600ns. Its open-drain SDA/SCL pins require external pull-ups, and it responds to slave address 0101xxxx (where A0–A3 set LSBs). ACK polling is supported for nonvolatile write completion, and all nine instructions-including Read/Write WCR and DR-follow I²C protocol conventions as defined in pages 3–7 of FN8194.

How does power-up sequencing affect wiper register recall in the X9418WV24IZ-2.7?

X9418WV24IZ-2.7 requires strict power-up order: VCC first, then V+ and V−, then potentiometer pins (VH/VL/VW). If VCC drops below 0.1V, it must remain there >1 second before re-powering to guarantee DR0→WCR reload. Violating this sequence-such as applying voltage to VH0 before V+-may cause incomplete or incorrect wiper initialization. Full recall occurs only after all three supplies (VCC, V+, V−) stabilize, with tPUR = 1ms minimum delay before issuing read commands.

Can the X9418WV24IZ-2.7 be used as a two-terminal variable resistor, and what is its maximum power rating?

Yes, X9418WV24IZ-2.7 supports two-terminal variable resistor mode using any VH/RH–VW/RW or VL/RL–VW/RW pair. Its maximum power rating is 50mW per potentiometer at +25°C, derived from 10kΩ resistance and ±3mA wiper current limit. Power dissipation must stay below this threshold under worst-case voltage/current conditions; exceeding it risks resistor array degradation or parametric shift per Analog Characteristics table on page 11.

What is the function of the WP pin on the X9418WV24IZ-2.7, and how does it interact with nonvolatile writes?

The WP (Write Protect) pin on X9418WV24IZ-2.7 is a low-active hardware lock that disables all nonvolatile writes to Data Registers DR0–DR3 when pulled LOW. When WP is HIGH, writes proceed normally; when LOW, instructions like Write Data Register or XFR WCR→DR are ignored. This provides fail-safe protection against unintended EEPROM corruption during firmware updates or ESD events, independent of software control-ensuring DR contents remain intact even if host code malfunctions.