Renesas AT25SL641-SUE-Y

Overview

AT25SL641-SUE-Y from Renesas Electronics is a 64-Mbit serial flash memory IC supporting SPI, Dual I/O, Quad I/O, and QPI interfaces with 133 MHz max clock frequency, 6 ns clock-to-output delay, and 1.7–2.0 V single-supply operation. It delivers up to 66 MB/s continuous data transfer and integrates hardware write protection, 4-kbit secured OTP, and SFDP compliance for embedded code storage and XiP applications in industrial IoT gateways.

For engineers reviewing the AT25SL641-SUE-Y datasheet, AT25SL641-SUE-Y pinout, AT25SL641-SUE-Y application, or AT25SL641-SUE-Y equivalent, key selection criteria include its dual/quad I/O timing performance, 2 µA deep power-down current, flexible erase architecture (4/32/64-kB blocks), JEDEC ID compatibility, and support for suspend/resume during program/erase operations.

Technical Context

The AT25SL641-SUE-Y implements a hierarchical erase architecture with physically distinct 4-kB, 32-kB, and 64-kB blocks-enabling efficient code partitioning and data logging without over-erasing. Its QPI mode uses a 4-bit command/address/data bus to achieve 532 MHz effective throughput, while Fast Read Quad I/O (EBh) and Word Read Quad I/O (E7h) commands optimize burst access latency.

Internal status register control includes dedicated BP2/BP1/BP0 bits for block protection, SRP0/SRP1 for status register lock, QE bit for quad enable, and SUS flag for erase/program suspend state tracking. The device supports both volatile and non-volatile status register writes, and integrates a 4-kbit one-time programmable security register accessible via B1h/C1h/2Bh/2Fh commands.

Key Specifications

Pinout & Package

AT25SL641-SUE-Y is packaged in an 8-pad DFN (6 × 5 × 0.6 mm), RoHS-compliant, green package with wettable flanks for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial flash memory applications.

Compared with W25Q64JVSSIQ and MT25QL512ABB8E12-0SIT, the AT25SL641-SUE-Y uniquely combines 1.7–2.0 V operation, QPI protocol, and 6 ns tV1 for ultra-low-latency XiP in space-constrained, battery-sensitive industrial edge nodes - making it optimal where voltage headroom and instruction fetch timing are limiting factors.

Availability

AT25SL641-SUE-Y is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical sensor data logging, automotive ADAS camera modules, and smart energy meter bootloader applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AT25SL641-SUE-Y 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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT markets.

The AT25SL641-SUE-Y belongs to Renesas' serial NOR flash product line, engineered specifically for ultra-low-voltage, high-reliability embedded code and data storage in space- and power-constrained industrial and medical edge devices.

FAQ

What interface protocols does the AT25SL641-SUE-Y support?

The AT25SL641-SUE-Y supports standard SPI (Modes 0 and 3), Dual I/O, Quad I/O, and QPI protocols. It achieves up to 133 MHz clock frequency in SPI/QPI modes, with Fast Read Quad I/O (EBh) and QPI Read commands enabling up to 66 MB/s continuous transfer. The device uses the same pinout across all modes, eliminating PCB redesign when upgrading interface bandwidth.

Does the AT25SL641-SUE-Y support execute-in-place (XiP) operation?

Yes, the AT25SL641-SUE-Y supports XiP through its 6 ns clock-to-output (tV1) timing and 133 MHz QPI interface, enabling low-latency instruction fetch directly from flash. Its flexible erase architecture - with 4-kB blocks aligned to typical code module sizes - minimizes erase overhead during runtime firmware updates, making AT25SL641-SUE-Y well-suited for microcontroller-based XiP deployments.

How is hardware write protection implemented on the AT25SL641-SUE-Y?

The AT25SL641-SUE-Y implements dual-layer hardware write protection: the WP# pin provides physical lock of status registers (BP2/BP1/BP0, SRP0/SRP1), while SRP0/SRP1 bits in Status Register-1 enable software-controlled locking of block protection settings. This ensures that critical boot sectors remain immutable even during field firmware updates, preserving system integrity in AT25SL641-SUE-Y-based designs.

What is the purpose and accessibility of the 4-kbit secured OTP register in the AT25SL641-SUE-Y?

The 4-kbit secured OTP register in the AT25SL641-SUE-Y stores immutable data such as cryptographic keys, device-specific identifiers, or calibration constants. It is accessed exclusively via dedicated commands: Enter Secured OTP (B1h), Exit Secured OTP (C1h), Read Security Register (2Bh), and Write Security Register (2Fh). Once programmed, OTP bits cannot be altered - ensuring persistent security for AT25SL641-SUE-Y implementations in regulated environments.

Can the AT25SL641-SUE-Y operate across the full industrial temperature range?

Yes, the AT25SL641-SUE-Y is fully specified for operation from -40 °C to +85 °C. All electrical characteristics - including 2 µA deep power-down current, 133 MHz max clock, and 100,000 program/erase cycles - are guaranteed across this range. Its 8-pad DFN package (6 × 5 × 0.6 mm) is qualified for industrial thermal cycling, making AT25SL641-SUE-Y suitable for deployment in harsh environments like factory automation and outdoor metering.