Renesas X93156UM8IZ-2.7T1

Overview

X93156UM8IZ-2.7T1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 32-tap, 50kΩ end-to-end resistance ladder with nonvolatile wiper position storage, Up/Down serial interface, and operation from 2.7V to 5.5V supply - used for precision analog trimming in LCD bias control, sensor calibration, and programmable gain circuits.

For engineers reviewing the X93156UM8IZ-2.7T1 datasheet, X93156UM8IZ-2.7T1 pinout, X93156UM8IZ-2.7T1 application, or X93156UM8IZ-2.7T1 equivalent, key selection criteria include its 50kΩ RTOTAL tolerance (±25%), 2µA max standby current, -40°C to +85°C industrial temperature range, and Pb-free 8-lead MSOP package compatibility with SnPb and lead-free reflow.

Technical Context

The X93156UM8IZ-2.7T1 integrates a 31-element resistor array, 5-bit up/down counter, nonvolatile EEPROM memory, and transfer-gate wiper switching network. Wiper position is updated on negative-edge transitions of INC while CS is active low, with direction controlled by U/D logic level.

It supports volatile operation during system adjustment and nonvolatile store-on-CS-high-with-INC-high, enabling power-up recall of last-trimmed setting. Terminal voltage range spans 0 to VCC, and wiper resistance is specified at 1100Ω typical with ±0.6mA max current handling.

Key Specifications

Pinout & Package

8-lead Mini Small Outline Plastic (MSOP) package per JEDEC MO-187AA, 3.0mm × 3.0mm body, 0.65mm lead pitch, matte tin e3 termination, compatible with both SnPb and Pb-free reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-50 and MCP41050-I/P, the X93156UM8IZ-2.7T1 offers minimal pin count (3-wire Up/Down), compact MSOP packaging, and deterministic nonvolatile store timing - making it optimal for space-constrained, low-pin-count embedded systems where simplicity and reliability outweigh protocol flexibility.

Availability

X93156UM8IZ-2.7T1 is available at Aetrix Electronics and suitable for LCD display tuning, sensor calibration, programmable gain amplifier design, and DC-DC feedback loop trimming requiring stable component supply across industrial temperature ranges.

Supply support for X93156UM8IZ-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) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X93156 series was developed as a solid-state replacement for mechanical potentiometers in industrial and consumer electronics requiring repeatable, maintenance-free analog trimming under varying environmental conditions.

FAQ

What is the maximum wiper current rating for the X93156UM8IZ-2.7T1?

The X93156UM8IZ-2.7T1 specifies a maximum wiper current (IW) of ±0.6mA. This limit ensures reliable operation of the internal transfer-gate switches and prevents localized heating or degradation of the 31-element resistor array. Exceeding this value may cause nonmonotonic behavior or accelerated wear. The device is intended for signal-level adjustment, not power-level control.

Does the X93156UM8IZ-2.7T1 require an external power-on reset or initialization sequence?

No, the X93156UM8IZ-2.7T1 does not require external reset. Upon power-up, it automatically recalls the last stored wiper position from nonvolatile memory if the CS pin is held HIGH during VCC ramp-up. If CS is left floating or pulled LOW at power-on, the wiper defaults to position 0. The internal 30kΩ pull-up on CS simplifies implementation in most systems.

Can the X93156UM8IZ-2.7T1 be used in a two-terminal (rheostat) configuration?

Yes, the X93156UM8IZ-2.7T1 supports two-terminal operation by connecting either RH or RL to Rw and using the remaining fixed terminal with the wiper as the variable resistance path. In this mode, the effective resistance ranges from near 0Ω (wiper at terminal) to RTOTAL (wiper at opposite end). Designers must observe the ±0.6mA wiper current limit and avoid exceeding 1mW total power dissipation.

What is the meaning of "-2.7" in the X93156UM8IZ-2.7T1 part number?

The "-2.7" suffix in X93156UM8IZ-2.7T1 indicates guaranteed operation across the extended 2.7V to 5.5V supply range, as opposed to standard versions rated only for 5V ±10%. This enables direct compatibility with 3.3V systems and brown-out tolerant designs without external regulators. The "UM8IZ" denotes 50kΩ RTOTAL, Pb-free MSOP package, and tape-and-reel delivery ("T1").

How is nonvolatile storage triggered on the X93156UM8IZ-2.7T1?

Nonvolatile storage on the X93156UM8IZ-2.7T1 is triggered by raising CS from LOW to HIGH while the INC input is held HIGH. This specific edge-and-level condition initiates an internal EEPROM write cycle lasting 5–10ms. During this time, the device enters standby mode and ignores further INC or U/D activity. No external command or timing controller is needed - the hardware detects and executes the store autonomously.