Renesas X9455TV24I-2.7

Overview

X9455TV24I-2.7 from Intersil is a dual two-wiper digitally controlled potentiometer (XDCP™) with 256-tap resolution, 100 kΩ end-to-end resistance, and dual 2-wire/Up-Down interfaces. It integrates two independent resistor arrays-each with two volatile wiper counter registers and four non-volatile data registers-and operates from 2.7V to 5.5V. Used for precision bias voltage trimming in analog front-ends and programmable gain networks.

For engineers reviewing the X9455TV24I-2.7 datasheet, X9455TV24I-2.7 pinout, X9455TV24I-2.7 application, or X9455TV24I-2.7 equivalent, this device supports deterministic wiper positioning via serial or discrete control, nonvolatile power-up recall of DR0A0/DR0B0/DR1A0/DR1B0 values, and hardware write protection via active-low WP pin-critical for field-programmable calibration stability.

Technical Context

The X9455TV24I-2.7 implements two monolithic CMOS resistor arrays, each with 255 series-connected segments and dual independently addressable wipers (RW0A/RW0B and RW1A/RW1B). Wiper positions are controlled by 8-bit volatile Wiper Counter Registers (WCRs), each backed by four non-volatile Data Registers (DR0A0–DR0A3, etc.) that load into their respective WCR on power-up.

It supports two concurrent interface modes: a 400 kHz 2-wire bus (SCL/SDA) with slave address A2–A0 and R/W bit, and an Up/Down mode using CS, U/D, SCL, DS0, and DS1 to select DCP and wiper. Hardware write protection (WP) disables nonvolatile writes when low, and standby current is <20 µA at 5.5 V.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), RoHS-compliant, Pb-free plus anneal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ100 and MCP42100-E/SL, the X9455TV24I-2.7 uniquely delivers dual two-wiper control with dual-interface redundancy and hardware write protection-making it the only option supporting fail-safe analog trimming in safety-critical or maintenance-constrained deployments.

Availability

X9455TV24I-2.7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable power supply feedback, and medical instrument calibration requiring stable component supply and long-term parameter retention.

Supply support for X9455TV24I-2.7 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 X9455TV24I-2.7 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in automated calibration, adaptive biasing, and field-programmable analog signal chains.

FAQ

What is the default wiper position loaded at power-up for X9455TV24I-2.7?

At power-up, X9455TV24I-2.7 automatically loads the contents of non-volatile Data Registers DR0A0, DR0B0, DR1A0, and DR1B0 into their corresponding volatile Wiper Counter Registers (WCR0A, WCR0B, WCR1A, WCR1B). This ensures repeatable startup behavior without requiring host initialization, provided VCC rises above 2.7 V and CS is held high during power sequencing.

Can X9455TV24I-2.7 operate reliably at 2.7 V supply voltage?

Yes, X9455TV24I-2.7 is fully specified for operation from 2.7 V to 5.5 V. Its 2-wire interface functions at 400 kHz, standby current remains below 20 µA, and wiper resistance stays within 40 Ω typical at minimum VCC-making it suitable for battery-powered systems where rail voltage sags near 2.7 V during discharge.

How does the hardware write protect (WP) pin function on X9455TV24I-2.7?

The WP pin on X9455TV24I-2.7 is an active-low input that disables all nonvolatile write operations-including 2-wire "Write to DR" commands and Up/Down "Store" actions-when pulled low. This prevents accidental overwriting of calibrated trim values in deployed systems, and must be held high during any intended nonvolatile programming sequence.

What is the maximum wiper current rating for X9455TV24I-2.7?

X9455TV24I-2.7 specifies a maximum wiper current of ±3 mA per wiper terminal. Exceeding this limit risks irreversible damage to internal switches and degrades long-term endurance. For current-sensing or LED bias applications, ensure external circuitry limits current through RW0A/RW0B/RW1A/RW1B to ≤3 mA under all operating conditions.

Does X9455TV24I-2.7 support true dual-ratio operation using both wipers of one DCP?

Yes, X9455TV24I-2.7 supports true dual-ratio operation: DCP0's RW0A and RW0B can independently divide the same RH0–RL0 100 kΩ resistor array, enabling simultaneous high-side/low-side threshold setting or ratiometric gain control. Matching between wipers is guaranteed at 0.75–2.0%, critical for balanced analog functions.