Renesas X9118TV14IZ-2.7

Overview

X9118TV14IZ-2.7 from Intersil is a single digitally controlled potentiometer (XDCP™) with 1024-tap resolution, 2-wire serial interface, and 100kΩ end-to-end resistance, operating from 2.7V to 5.5V supply. It functions as a programmable three-terminal voltage divider or two-terminal variable resistor in precision analog signal conditioning circuits.

For engineers reviewing the X9118TV14IZ-2.7 datasheet, X9118TV14IZ-2.7 pinout, X9118TV14IZ-2.7 application, or X9118TV14IZ-2.7 equivalent, this device supports nonvolatile wiper position storage, power-on recall from DR0, hardware write protection via WP pin, and ±5V analog rail operation - critical for industrial sensor trimming and DC bias control where supply headroom is constrained.

Technical Context

The X9118TV14IZ-2.7 implements a 1023-element CMOS resistor array with decoded 10-bit Wiper Counter Register (WCR) controlling transmission-gate switches to select one of 1024 tap points. Its volatile WCR loads default value from nonvolatile Data Register 0 (DR0) at power-up.

Communication occurs over a standard 2-wire bus (SCL/SDA) with slave address determined by A1/A0 pins, supporting up to four devices on one bus. The WP pin disables nonvolatile writes when asserted low, and all register transfers (read/write/XFR) follow defined 2- or 4-byte instruction sequences with ACK polling for write completion.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (Pb-free, RoHS compliant), M14.173 drawing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-100 and MCP41010-I/P, the X9118TV14IZ-2.7 uniquely combines 10-bit resolution, hardware write protection, power-on recall, and ±5V analog operation - making it the only option among the three qualified for industrial sensor calibration and unattended analog trimming.

Availability

X9118TV14IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and audio gain control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9118TV14IZ-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) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing precision, reliability, and robustness.

The X9118TV14IZ-2.7 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimmers in analog signal-path calibration where nonvolatile storage, wide analog voltage range, and 2-wire simplicity are required.

FAQ

What is the minimum VCC voltage required for reliable operation of the X9118TV14IZ-2.7?

The X9118TV14IZ-2.7 is specified for operation from 2.7V to 5.5V on VCC. Below 2.7V, internal logic may fail to decode 2-wire commands correctly, and nonvolatile write timing (tWR) becomes unreliable. The device will not function at VCC < 2.7V, as confirmed in the Absolute Maximum Ratings table on page 10 of FN8161 Rev 5.00. Always maintain VCC ≥ 2.7V for guaranteed operation of X9118TV14IZ-2.7.

Does the X9118TV14IZ-2.7 support true bipolar analog operation?

Yes. The X9118TV14IZ-2.7 supports analog supplies V+ = +2.7V to +5.5V and V− = −5.5V to −2.7V, enabling RH/RL/RW voltages spanning −5.5V to +5.5V. This permits direct use in bipolar op-amp circuits, such as instrumentation amplifiers or dual-supply filters, without external level shifters - a capability explicitly verified in the Analog Specifications table (page 10) and Functional Diagram (page 2) of the X9118TV14IZ-2.7 datasheet.

How does the hardware write protect (WP) pin affect nonvolatile register writes in the X9118TV14IZ-2.7?

When the WP pin is driven LOW, the X9118TV14IZ-2.7 blocks all nonvolatile writes to its four Data Registers (DR0–DR3). Volatile writes to the Wiper Counter Register (WCR) remain fully functional. This behavior is hardware-enforced and independent of command execution - confirmed in the Pin Descriptions section (page 3) and Instruction Set table (page 6) of FN8161. WP provides fail-safe protection against unintended calibration erasure in the X9118TV14IZ-2.7.

Can the X9118TV14IZ-2.7 be used with standard I²C master controllers?

Yes. The X9118TV14IZ-2.7 implements a standard 2-wire (I²C-compatible) slave interface with open-drain SDA/SCL, 7-bit slave addressing (0101xxx), and ACK/NACK handshaking. It complies with I²C timing requirements up to 400kHz (page 12), including start/stop conditions, data setup/hold, and clock stretching via ACK polling during nonvolatile writes. No protocol translation is needed for integration with standard I²C masters in the X9118TV14IZ-2.7.

What is the wiper response time after issuing a write command to the X9118TV14IZ-2.7?

The wiper responds to volatile register updates (WCR writes or XFR instructions) in 8µs maximum, as specified in the XDCP Timing table (page 12, tWRL). This delay is independent of VCC or temperature and applies to all load instructions that change the wiper position. The value is measured from the final falling edge of SCL in the command sequence to stable RW voltage - a hard timing limit validated across the −40°C to +85°C range for X9118TV14IZ-2.7.