Renesas X93156WM8IZ-2.7T1

Overview

X93156WM8IZ-2.7T1 from Intersil is a single-channel digitally controlled potentiometer (XDCP™) with 32-tap resolution, nonvolatile wiper position storage, and low-noise CMOS architecture. It functions as a programmable three-terminal resistor or two-terminal variable resistor, operating from 2.7V to 5.5V supply, delivering 12.5kΩ end-to-end resistance and ±1 MI absolute linearity for precision analog trimming in LCD bias control and sensor calibration circuits.

For engineers reviewing the X93156WM8IZ-2.7T1 datasheet, X93156WM8IZ-2.7T1 pinout, X93156WM8IZ-2.7T1 application, or X93156WM8IZ-2.7T1 equivalent, key selection considerations include its Up/Down interface timing (tCYC = 2µs), EEPROM store capability on CS↑/INC↑, 2µA max standby current, and MSOP-8 Pb-free RoHS-compliant packaging suitable for space-constrained industrial and consumer designs.

Technical Context

The X93156WM8IZ-2.7T1 implements a 31-element resistor array with electronically switched wiper positions controlled by a 5-bit up/down counter and decoded logic. Wiper position is stored in nonvolatile memory upon CS rising edge while INC is HIGH, enabling automatic power-up recall without external configuration.

Its operation requires no clock or serial bus-only three digital control lines (CS, U/D, INC) with negative-edge-triggered INC and level-sensitive U/D direction control. Terminal voltages are rail-to-rail (0 to VCC), and wiper resistance is specified at 1100Ω with ±0.6mA maximum wiper current, supporting direct connection to op-amp feedback paths and voltage divider networks.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS-compliant), JEDEC MO-187AA footprint (3.0mm × 3.0mm × 1.1mm height), thermal resistance θJA = 190°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP4017T-103I/OT, the X93156WM8IZ-2.7T1 uniquely combines Up/Down simplicity, nonvolatile retention, and 12.5kΩ resistance optimized for bias-setting applications-making it ideal for self-contained analog trimming where I²C overhead or external state management is undesirable.

Availability

X93156WM8IZ-2.7T1 is available at Aetrix Electronics and suitable for LCD brightness control, sensor offset calibration, audio volume trim, and power supply feedback divider applications requiring stable component supply, long-term obsolescence mitigation, and RoHS-compliant packaging.

Supply support for X93156WM8IZ-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 (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.

The X93156 series belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical potentiometers in analog trimming, calibration, and bias-setting applications where reliability, programmability, and nonvolatile state retention are critical.

FAQ

What is the supply voltage range supported by the X93156WM8IZ-2.7T1?

The X93156WM8IZ-2.7T1 operates from 2.7V to 5.5V, as confirmed in the "Recommended Operating Conditions" section of FN8182 Rev 3.00. This wide range allows direct compatibility with both 3.3V and 5V logic systems without level translation. The "-2.7" suffix explicitly denotes this extended low-voltage capability, distinguishing it from the 5V±10% variants. The X93156WM8IZ-2.7T1 maintains full functionality-including wiper movement, storage, and linearity-across this entire range.

Does the X93156WM8IZ-2.7T1 retain its wiper position after power loss?

Yes, the X93156WM8IZ-2.7T1 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is enabled by asserting CS HIGH while INC is HIGH-a store command that writes the current 5-bit counter value to EEPROM. Data retention is rated for 100 years, and endurance is 200,000 write cycles per bit. The X93156WM8IZ-2.7T1 does not require external backup power or host MCU intervention to preserve trim settings across power cycles.

How many wiper positions does the X93156WM8IZ-2.7T1 provide, and what is its resolution?

The X93156WM8IZ-2.7T1 provides 32 discrete wiper positions (0 through 31), implemented via a 5-bit up/down counter driving a 31-resistor ladder. Resolution is defined as 3% of full-scale resistance per step (RTOT/31), with absolute linearity error limited to ±1 MI (minimum increment). This yields monotonic, repeatable adjustment suitable for precision analog trimming tasks where step consistency matters more than ultra-fine granularity.

What package type and lead finish does the X93156WM8IZ-2.7T1 use?

The X93156WM8IZ-2.7T1 uses an 8-lead MSOP package (JEDEC MO-187AA, pkg drawing M8.118) with dimensions 3.0mm × 3.0mm × 1.1mm. It features a Pb-free (RoHS-compliant) termination with 100% matte tin plating and annealing (e3 finish), compatible with both SnPb and Pb-free soldering processes. The "Z" in the part number explicitly denotes this Pb-free construction, and thermal resistance θJA is 190°C/W under standard test conditions.

Can the X93156WM8IZ-2.7T1 be used as a two-terminal variable resistor?

Yes, the X93156WM8IZ-2.7T1 can be configured as a two-terminal variable resistor by connecting either RH or RL to Rw and leaving the other fixed terminal unconnected or grounded. The datasheet confirms this usage in the "Applications" section, citing bias voltage programming and ladder networks. Wiper current is rated ±0.6mA, and terminal voltage range remains 0 to VCC, ensuring safe operation in rheostat mode without derating. The X93156WM8IZ-2.7T1 maintains its 12.5kΩ RTOT and nonvolatile storage functionality in this configuration.