Renesas X9315UMIZT1

Overview

X9315UMIZT1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 discrete wiper tap positions, nonvolatile memory for power-up recall, and 3-wire serial interface (CS/U/D/INC). It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming applications requiring stable resistance values across temperature, such as sensor calibration and DC bias adjustment in industrial signal conditioning circuits.

For engineers reviewing the X9315UMIZT1 datasheet, X9315UMIZT1 pinout, X9315UMIZT1 application, or X9315UMIZT1 equivalent, this page delivers verified specifications including ±20% end-to-end resistance tolerance, 50 kΩ total resistance, -40°C to +85°C operating range, MSOP-8 package, and 5 µA standby current - all critical for embedded analog control design and long-term field reliability validation.

Technical Context

The X9315UMIZT1 uses a 5-bit up/down counter driving a decoder that selects one of 32 wiper positions across a monolithic 31-resistor ladder. Wiper movement follows make-before-break switching to prevent open-circuit transients during position changes.

Nonvolatile storage is triggered by a CS↑ transition while INC is HIGH, writing the current counter state to EEPROM with 100,000-cycle endurance and 100-year data retention. The device operates at VCC = 5V ±10% and supports terminal voltages from VSS to VCC without damage.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ50 and MCP41050-I/P, the X9315UMIZT1 offers deterministic 3-wire timing, guaranteed power-up position retention, and industrial temperature rating - making it optimal for unattended calibration and maintenance-free analog subsystems.

Availability

X9315UMIZT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply feedback networks, and audio signal path trimming requiring stable component supply and long-term parametric consistency.

Supply support for X9315UMIZT1 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 industrial, communications, and computing markets.

The X9315 product line delivers solid-state digitally controlled potentiometers optimized for precision analog trimming in harsh environments, emphasizing nonvolatile retention, low power, and robust temperature stability.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9315UMIZT1?

The X9315UMIZT1 specifies ΔV = |VH – VL| ≤ 5 V as an absolute maximum rating. This limit ensures safe operation of the internal resistor array and switching elements. Exceeding 5 V risks permanent damage to the device, regardless of whether VCC is applied. The terminals must also remain within VSS ≤ VH, VL ≤ VCC at all times.

Does X9315UMIZT1 retain its wiper position after power cycling?

Yes, X9315UMIZT1 retains its last stored wiper position in nonvolatile EEPROM memory and automatically recalls it on power-up. This behavior is guaranteed by design: the wiper position is written to memory only when CS transitions HIGH while INC is HIGH, and the recalled value is loaded into the counter at VCC stabilization.

Can X9315UMIZT1 operate from a 3.3 V supply?

No, X9315UMIZT1 is specified only for VCC = 5 V ±10% (4.5–5.5 V). It is not rated for 3.3 V operation. For 2.7–5.5 V compatibility, the X9315UMIZ-2.7T1 variant must be used - the "-2.7" suffix explicitly denotes extended supply range support.

What is the wiper resistance specification for X9315UMIZT1 at 5 V supply?

The wiper resistance (RW) for X9315UMIZT1 is specified as 200 Ω typical and 400 Ω maximum at VCC = 5 V. This value represents the series resistance between the RW/VW pin and the selected resistor tap point, directly impacting voltage division accuracy and loading effects in high-impedance circuits.

Is X9315UMIZT1 pin-compatible with other members of the X9315 family?

Yes, all X9315 variants-including X9315UMIZT1-share identical 8-pin MSOP pinout and electrical interface. Differences are limited to RTOTAL (50 kΩ), temperature grade (-40°C to +85°C), and packaging (Pb-free MSOP), ensuring direct substitution where those parameters align with system requirements.