Renesas X9111TV14IZ-2.7T1

Overview

X9111TV14IZ-2.7T1 from Intersil is a single-supply, low-power, 1024-tap digitally controlled potentiometer (XDCP™) with SPI interface, 100kΩ end-to-end resistance, 2.7V–5.5V operation, and 40Ω typical wiper resistance at 5V. It functions as a 3-terminal potentiometer or 2-terminal variable resistor in precision analog trimming applications such as gain control in op-amp circuits and DC bias adjustment in voltage regulators.

For engineers reviewing the X9111TV14IZ-2.7T1 datasheet, X9111TV14IZ-2.7T1 pinout, X9111TV14IZ-2.7T1 application, or X9111TV14IZ-2.7T1 equivalent, this page delivers verified technical context, SPI timing constraints, nonvolatile register behavior, power-up recall functionality, and real-world circuit-level use cases for embedded analog signal conditioning.

Technical Context

The X9111TV14IZ-2.7T1 implements a 1023-element CMOS resistor array with decoded 10-bit Wiper Counter Register (WCR) controlling one of 1024 tap switches. Its SPI interface complies with standard hardware conventions: data latched on SCK rising edge, output shifted on falling edge, and supports hold/pause via HOLD pin while SCK is low.

It integrates four 10-bit nonvolatile Data Registers (DR0–DR3), each supporting 100,000 write cycles and 100-year data retention. Power-on recall loads DR0 into the volatile WCR, enabling deterministic startup wiper position without host initialization.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm wide), RoHS-compliant, M14.173 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ10 and MCP41010-I/P, the X9111TV14IZ-2.7T1 uniquely provides four nonvolatile data registers, deterministic power-on recall from DR0, and 100kΩ resistance optimized for high-impedance analog nodes-making it superior for calibration-critical, maintenance-free industrial systems.

Availability

X9111TV14IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply trimming, and embedded audio level control requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for X9111TV14IZ-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 Corporation is a precision analog and power management IC specialist, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and automotive markets.

The X9111 product line was designed for digitally programmable analog trimming in space-constrained, low-power systems-emphasizing nonvolatile configuration storage, SPI compatibility, and robust operation across industrial temperature ranges.

FAQ

What is the power-up behavior of the X9111TV14IZ-2.7T1?

The X9111TV14IZ-2.7T1 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) upon power-up, ensuring a known, repeatable wiper position without host intervention. This recall occurs within 1ms after VCC stabilizes, and DR0 retains its value for 100 years. The X9111TV14IZ-2.7T1 thus guarantees deterministic analog startup behavior critical for unattended or remote systems.

Does the X9111TV14IZ-2.7T1 support multiple devices on the same SPI bus?

Yes, the X9111TV14IZ-2.7T1 supports up to four devices on a shared SPI bus using its dual address pins A0 and A1. These pins configure a 2-bit slave address matched against the ID byte sent by the master. Each device responds only when its physical A1/A0 state matches the transmitted address bits, enabling independent read/write/transfer operations without bus contention. The X9111TV14IZ-2.7T1 maintains full SPI compliance including tri-state SO and HOLD functionality.

How does the HOLD pin function during SPI communication with the X9111TV14IZ-2.7T1?

The HOLD pin on the X9111TV14IZ-2.7T1 pauses an active SPI transaction without resetting the command sequence: it must be asserted LOW while SCK is LOW, and resumed by returning HIGH while SCK remains LOW. During hold, the device retains internal state-including partial instruction decoding and register pointers-allowing the host MCU to service higher-priority interrupts and resume exactly where it left off. This feature is unique to the X9111TV14IZ-2.7T1 among 10-bit DCPs and eliminates retransmission overhead.

What is the maximum wiper current rating for the X9111TV14IZ-2.7T1?

The X9111TV14IZ-2.7T1 specifies a maximum wiper current (I_W) of ±3mA under steady-state conditions. Exceeding this limit risks localized heating and long-term degradation of the CMOS switch array. The wiper resistance is 40Ω typical at 5V, meaning voltage drop across RW remains below 120mV at ±3mA-preserving linearity in precision divider applications. For higher-current paths, external buffering or relay-based switching is recommended instead of direct wiper loading.

Can the X9111TV14IZ-2.7T1 be used as a two-terminal variable resistor?

Yes, the X9111TV14IZ-2.7T1 can operate as a two-terminal variable resistor by connecting either RH or RL to RW (e.g., short RH to RW for a rheostat between RL and RW). In this mode, total resistance varies from near 0Ω (wiper at shorted terminal) to 100kΩ (wiper at opposite terminal), with 10-bit resolution and ±1 MI linearity. The X9111TV14IZ-2.7T1 maintains its 40Ω typical wiper resistance and 2.7V–5.5V supply compatibility in rheostat configuration, making it suitable for LED current limiting and oscillator frequency tuning.