Renesas AT25QL641-MHE-T

Overview

AT25QL641-MHE-T from Renesas Electronics is a 64-Mbit (8 × 8 Mbit) serial NOR Flash memory IC designed for code shadowing and embedded data storage in resource-constrained systems. It operates from a single 1.7–2.0 V supply, supports SPI/QPI protocols up to 133 MHz, delivers 6 ns clock-to-output timing, and achieves up to 66 MB/s continuous read throughput via Quad I/O mode.

For engineers reviewing the AT25QL641-MHE-T datasheet, AT25QL641-MHE-T pinout, AT25QL641-MHE-T application, or AT25QL641-MHE-T equivalent, key selection considerations include its industrial temperature range (−40 °C to +85 °C), 4-kbit secured OTP register, deep power-down current (2 µA typical), flexible erase architecture (4/32/64 kB blocks), and JEDEC-compliant SFDP register support.

Technical Context

The AT25QL641-MHE-T implements a dual-mode serial interface supporting both standard SPI (Modes 0/3) and quad-protocol QPI operation, with hardware-configurable Quad Enable (QE) bit factory-set for default Quad I/O activation. Its memory array comprises 32,768 pages of 256 bytes each, organized into eight 8-Mbit physical blocks.

Command execution includes full chip erase, granular block erases (4/32/64 kB), suspend/resume for program/erase operations, and hardware write protection via dedicated WP pin and status register lock bits (SRP0/SRP1). The device integrates Serial Flash Discoverable Parameters (SFDP) v1.6 for automatic configuration by host controllers.

Key Specifications

Pinout & Package

AT25QL641-MHE-T is packaged in an 8-pad UDFN (6 × 5 × 0.6 mm) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial NOR Flash memory applications.

Compared with W25Q64JW-IQ and MX25L6433FZNI-10G, the AT25QL641-MHE-T provides native 1.8 V operation, factory-default Quad Enable, and full SFDP v1.6 compliance - reducing firmware integration effort and improving boot-time predictability in new designs.

Availability

AT25QL641-MHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive ADAS sensor modules, and smart energy meter firmware requiring stable component supply across multi-year production cycles.

Supply support for AT25QL641-MHE-T 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

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and IoT applications.

The AT25QL641 product line delivers high-performance, low-voltage serial NOR Flash memory optimized for code execution and secure data storage in space- and power-constrained embedded systems.

FAQ

What is the operating voltage range for the AT25QL641-MHE-T?

The AT25QL641-MHE-T operates from a single 1.7 V to 2.0 V supply, with typical operation at 1.8 V. This narrow voltage window ensures compatibility with modern low-power microcontrollers and reduces need for external voltage regulation. The device maintains full functionality-including 133 MHz QPI operation and 6 ns tV1-across this range, as verified in Renesas' DS-AT25QL641-130 Rev. H electrical characteristics table.

Does the AT25QL641-MHE-T support Quad SPI mode out of the box?

Yes, the AT25QL641-MHE-T has Quad Enable (QE) bit factory-set to '1', enabling Quad I/O and QPI protocols immediately after power-up without software configuration. This default state is documented in Section 7.7 of the datasheet and confirmed by the "Quad enabled (factory default setting)" feature bullet on page 1. Users retain full control to disable QE via Status Register-2 writes if needed.

How does the AT25QL641-MHE-T handle power-loss during programming?

The AT25QL641-MHE-T incorporates hardware write protection (WP pin) and volatile/non-volatile status register locks (SRP0/SRP1) to prevent unintended writes during brown-out conditions. While it does not include internal power-loss recovery circuitry, its 256-byte page programming granularity and suspend/resume commands (75h/7Ah) allow host firmware to implement robust transactional update logic-ensuring partial writes do not corrupt valid code or data sectors.

What package type is used for the AT25QL641-MHE-T?

The AT25QL641-MHE-T uses an 8-pad UDFN (6 × 5 × 0.6 mm) package with wettable flanks, as specified in the Ordering Information table (page 75) and Packaging Information section (11.1). This compact, leadless package supports high-density PCB layouts and automated optical inspection, distinguishing it from SOIC and WLCSP variants in the same family.

Is the 4-kbit OTP security register accessible via standard SPI commands?

Yes, the 4-kbit secured OTP register in the AT25QL641-MHE-T is accessed using dedicated commands: Enter Secured OTP (B1h), Exit Secured OTP (C1h), Read Security Register (2Bh), and Write Security Register (2Fh). These are defined in Sections 8.36–8.39 of the datasheet and require explicit entry into secured mode before read/write operations-preventing accidental or unauthorized access during normal SPI traffic.