Renesas X9110TV14I

Overview

X9110TV14I from Intersil is a dual-supply, low-power, 1024-tap digitally controlled potentiometer (XDCP™) with SPI interface, 100kΩ end-to-end resistance, ±5V analog voltage range (V+/V−), and industrial −40°C to +85°C operation - used for precision gain control in audio amplifiers and DC bias trimming in RF power amplifier stages.

For engineers reviewing the X9110TV14I datasheet, X9110TV14I pinout, X9110TV14I application, or X9110TV14I equivalent, this page delivers verified technical context, SPI timing constraints, nonvolatile register behavior, wiper resistance at 3V/5V, power-up recall functionality, and real-world circuit-level use cases including voltage regulator feedback scaling and Wheatstone bridge trimming.

Technical Context

The X9110TV14I implements a monolithic CMOS 1024-element resistor ladder with CMOS switch-controlled wiper positioning via a volatile 10-bit Wiper Counter Register (WCR). Its SPI interface supports four-byte read/write instructions and two-byte transfer commands between WCR and four nonvolatile 10-bit data registers (DR0–DR3).

It operates with independent analog supplies (V+ = +2.7V to +5.5V, V− = −5.5V to −2.7V) and system supply (VCC = 2.7V to 5.5V), enabling true bipolar signal handling across RH/RL terminals while maintaining <5µA standby current and 100-year data retention in DR registers.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (RoHS-compliant, M14.173 drawing), 5.0mm × 4.4mm × 1.2mm body, 0.65mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42010-I/P, the X9110TV14I uniquely supports true bipolar analog operation (±5.5V), integrates hardware write protection, and provides guaranteed power-up recall - making it the only option for precision RF biasing, AC-coupled sensor conditioning, and fail-safe industrial calibrations.

Availability

X9110TV14I is available at Aetrix Electronics and suitable for audio amplifier gain control, voltage regulator feedback scaling, RF power amplifier bias tuning, and Wheatstone bridge offset trimming requiring stable component supply across industrial temperature ranges.

Supply support for X9110TV14I 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, communications, and computing markets.

The X9110TV14I belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability, programmable analog signal paths requiring nonvolatile storage and SPI configurability.

FAQ

What is the absolute maximum voltage rating on the RH and RL pins of the X9110TV14I?

The RH and RL pins of the X9110TV14I tolerate voltages from V− to V+, with V+ rated up to +5.5V and V− down to −5.5V. Per Absolute Maximum Ratings, any RH/RL voltage must not exceed V+ nor fall below V−; violating this risks latch-up or permanent damage. The X9110TV14I datasheet explicitly states "Any Voltage on RH/RL ≤ V+" and "Any Voltage on RL/RH ≥ V−", confirming strict adherence to the analog supply rails.

Does the X9110TV14I support true bipolar operation, and how is it implemented?

Yes, the X9110TV14I supports true bipolar operation via separate V+ and V− analog supply pins, allowing RH and RL to swing from −5.5V to +5.5V relative to VSS. This architecture enables AC-coupled signal paths - such as comparator hysteresis networks or RF attenuator biasing - without level-shifting circuitry. The X9110TV14I's internal CMOS switches are biased independently by V+ and V−, ensuring linear conduction across the full bipolar range.

How does the power-up recall function work in the X9110TV14I, and which register is loaded?

On power-up, the X9110TV14I automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR), establishing the initial wiper position without host intervention. This behavior is hardwired and occurs after all supplies (VCC, V+, V−) stabilize within 1ms. The X9110TV14I datasheet confirms "Power-on recall, loads saved wiper position on power-up" and specifies DR0 as the default source in Figure 1 and Table 1.

What is the wiper resistance specification for the X9110TV14I at 3V and 5V supply, and why does it vary?

The X9110TV14I wiper resistance is 150Ω typical at VCC = 3V and 100Ω typical at VCC = 5V (per Page 10 Analog Specifications). This variation arises from the on-resistance characteristics of the internal CMOS pass transistors, which decrease with higher gate drive voltage. Designers must account for this in low-impedance feedback paths - e.g., a 100kΩ pot with 150Ω wiper introduces <0.15% gain error in a noninverting amplifier configuration.

Can the X9110TV14I be used in a two-wire SPI configuration where SO and SI share a single line?

Yes, the X9110TV14I supports two-wire SPI operation because both SO and SI are three-state outputs. When CS is HIGH, SO enters high-impedance mode, allowing SI to drive the shared line; during reads, SO drives while SI is tri-stated. The X9110TV14I datasheet explicitly states "SO and SI pins can be connected together… to reduce system pin count", and timing diagrams (Figures 7–8) confirm compatible edge-triggered behavior.