Renesas X9118TV14IZ

Overview

X9118TV14IZ from Intersil is a digitally controlled potentiometer (XDCP™) with 1024-tap resolution, 2-wire serial interface, and 100kΩ end-to-end resistance. It operates from 2.7V to 5.5V system supply and supports analog voltage rails from –5V to +5V, enabling precision DC biasing and gain control in mixed-signal circuits such as sensor signal conditioning and voltage regulator feedback loops.

For engineers reviewing the X9118TV14IZ datasheet, X9118TV14IZ pinout, X9118TV14IZ application, or X9118TV14IZ equivalent, this device delivers non-volatile wiper position storage across four registers, power-on recall from DR0, <15µA standby current, and TSSOP-14 packaging suitable for space-constrained industrial and embedded designs requiring stable programmable resistance.

Technical Context

The X9118TV14IZ implements a monolithic CMOS resistor array of 1023 segments with CMOS transmission-gate switches controlled by a 10-bit volatile Wiper Counter Register (WCR). Its 2-wire bus interface uses open-drain SDA with pull-up (2–2.5kΩ typical), supports up to 400kHz clock frequency, and includes hardware write protection via the WP pin.

It features dual analog supplies (V+, V−) independent of digital VCC/VSS, allowing operation with bipolar analog signals while maintaining digital logic compatibility. Power-up loads DR0 into WCR, and non-volatile writes to data registers require up to 10ms with ACK polling support.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (M14.173), RoHS-compliant, Pb-free matte tin finish, MSL Level 3 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-100 and MCP41HV51-103, the X9118TV14IZ uniquely combines 10-bit resolution, true bipolar analog operation (–5V to +5V), four non-volatile registers, and power-on DR0 recall - making it optimal for industrial calibration-critical systems requiring long-term analog stability and flexible digital control.

Availability

X9118TV14IZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply design, and embedded audio control requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for X9118TV14IZ 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 X9118 series was designed as a drop-in replacement for mechanical potentiometers in automated calibration, closed-loop control, and programmable analog signal paths - emphasizing non-volatility, bipolar operation, and robust serial interface reliability.

FAQ

What is the maximum analog voltage range supported by the X9118TV14IZ?

The X9118TV14IZ supports analog voltages from –5.5V to +5.5V on V+ and V− pins, enabling true bipolar operation. RH and RL terminals may swing between V− and V+, and the wiper (RW) remains functional across this full range as long as V+ ≥ VRH/RL ≥ V−. This makes X9118TV14IZ suitable for applications like op-amp offset trimming with dual supplies.

How does the power-on recall function work in the X9118TV14IZ?

On power-up, the X9118TV14IZ automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR), positioning the wiper accordingly. This behavior occurs regardless of prior WCR state and requires no host intervention. The X9118TV14IZ guarantees this load only if VCC, V+, and V− reach stable values within 1ms of each other.

Can the X9118TV14IZ be used with a 3.3V microcontroller I²C bus?

Yes - the X9118TV14IZ's 2-wire interface is compatible with 3.3V I²C masters. Its VIH threshold is VCC × 0.7 (min), and with VCC = 3.3V, that equals ~2.3V, safely exceeded by standard 3.3V logic highs. SDA is open-drain, so a 3.3V pull-up resistor (e.g., 2.2kΩ) ensures proper signal levels without level shifting.

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

The X9118TV14IZ exhibits a wiper response time of 8µs (typical) after any load instruction (e.g., Write WCR or XFR DR→WCR) is fully acknowledged. This delay reflects internal switch settling and is independent of bus speed. For volatile writes, the new wiper position is active within one instruction cycle plus tWRL; no wait states are required.

Does the X9118TV14IZ require external components for basic operation?

Yes - the X9118TV14IZ requires external pull-up resistors on SDA and SCL (2–2.5kΩ typical for 400kHz), and decoupling capacitors on VCC and analog supplies (e.g., 100nF ceramic near each supply pin). No external DAC, EEPROM, or voltage references are needed, as all non-volatile storage and interface logic are integrated within the X9118TV14IZ.