Renesas X9315UMIT1

Overview

X9315UMIT1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates at VCC = 5V ±10%, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (–40°C to +85°C) in an 8-lead MSOP package. It functions as a three-terminal voltage divider or two-terminal variable resistor for precision analog trimming in sensor signal conditioning circuits.

For engineers reviewing the X9315UMIT1 datasheet, X9315UMIT1 pinout, X9315UMIT1 application, or X9315UMIT1 equivalent, this page provides verified specifications including wiper resistance (200 Ω typ. at 5V), active current (80 µA max.), standby current (5 µA max.), absolute linearity (±1 MI), and ratiometric temperature coefficient (±20 ppm/°C) - all confirmed for the exact X9315UMIT1 variant.

Technical Context

The X9315UMIT1 uses a 5-bit up/down counter driving a 32-position decoder to select one of 31 resistive elements in series, enabling precise digital control of wiper position. Its nonvolatile memory stores the last wiper setting and recalls it on power-up, eliminating need for host initialization.

It employs "make-before-break" switching during wiper transitions to prevent open-circuit conditions, and supports bidirectional wiper movement via U/D input polarity while INC triggers edge-sensitive stepping. The device requires no external components for basic operation and maintains wiper position stability across temperature (±300 ppm/°C RTOTAL TC).

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free matte tin finish, body dimensions 3.0 mm × 3.0 mm × 0.85 mm (JEDEC MO-187AA).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ10 and MCP41050-I/P, the X9315UMIT1 offers guaranteed 5V-only operation, deterministic 3-wire timing, and true nonvolatile retention - making it optimal for industrial systems where supply stability, interface simplicity, and zero-host-initialization are design priorities.

Availability

X9315UMIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, laser diode biasing, audio signal conditioning, and precision ADC reference scaling requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9315UMIT1 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 focused on power management, precision analog, and interface solutions for industrial, computing, and communications markets.

The X9315UMIT1 belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) product line, engineered specifically for replacing mechanical potentiometers in applications demanding long-term stability, programmability, and nonvolatile setting retention under harsh environmental conditions.

FAQ

What is the exact end-to-end resistance value of the X9315UMIT1?

The X9315UMIT1 has a nominal RTOTAL of 50 kΩ with a tolerance of ±20%, meaning its actual resistance falls between 40 kΩ and 60 kΩ at 25°C. This value is fixed per device variant and confirmed in the Ordering Information table of FN8179 Rev.2.00 - unlike other X9315 variants offering 10 kΩ or 100 kΩ, the X9315UMIT1 is exclusively the 50 kΩ version.

Does the X9315UMIT1 support 2.7V operation?

No, the X9315UMIT1 is rated only for VCC = 5V ±10% (4.5 V to 5.5 V). It is not the "-2.7" variant (e.g., X9315UMIT1-2.7 does not exist); the datasheet explicitly lists X9315UMIT1 under the 5V column in the Ordering Information table and specifies "X9315" (not "X9315-2.7") in its Absolute Maximum Ratings and Recommended Operating Conditions.

How is wiper position stored and recalled in the X9315UMIT1?

The X9315UMIT1 stores wiper position in nonvolatile EEPROM when CS transitions HIGH while INC is held HIGH. Upon power-up, the stored value is automatically loaded into the wiper counter, positioning RW/VW at the last saved tap. This occurs without host intervention and is guaranteed for 100 years per Intersil's specification in FN8179 Rev.2.00.

What is the maximum allowable wiper current for the X9315UMIT1?

The maximum wiper current (IW) for the X9315UMIT1 is ±3.75 mA, as specified in the Recommended Operating Conditions section of FN8179 Rev.2.00. Exceeding this limit risks exceeding the 10 mW maximum power rating and may cause irreversible resistance drift or wiper switch degradation over time.

Is the X9315UMIT1 pin-compatible with other X9315 variants in MSOP packages?

Yes, all X9315 variants in 8-lead MSOP (including X9315UMIT1, X9315WMIT2, X9315UMIZ, etc.) share identical pinout, package outline (M8.118), and footprint. Mechanical and electrical compatibility is confirmed by the unified Pin Configuration diagram and Package Outline Drawing on pages 4 and 13 of FN8179 Rev.2.00.