Renesas AT25SL128A-UUE-T

Overview

AT25SL128A-UUE-T from Renesas Electronics is a 128-Mbit SPI serial flash memory IC supporting Quad I/O (1-4-4), Dual I/O (1-1-2), and QPI (4-4-4) interfaces, operating at 1.7–2.0 V supply with fast read up to 133 MHz and 10 μA standby current. It enables Execute-in-Place (XiP) in industrial embedded systems requiring reliable nonvolatile code storage.

For engineers reviewing the AT25SL128A-UUE-T datasheet, AT25SL128A-UUE-T pinout, AT25SL128A-UUE-T application, or AT25SL128A-UUE-T equivalent, key selection criteria include quad/dual I/O timing compliance, 4-kB/32-kB/64-kB erase granularity, SFDP register support for auto-configuration, and WP/HOLD pin-controlled memory protection in space-constrained industrial designs.

Technical Context

The AT25SL128A-UUE-T implements a flexible SPI command architecture supporting four operational modes: standard SPI (Modes 0/3), Dual SPI (1-1-2), Quad SPI (1-1-4), and QPI (4-4-4). Its memory array is organized into uniform 4-kB sectors, with configurable block protection via status register bits BP2–BP0 and TB/SEC fields.

It integrates hardware-based erase/program suspend-resume functionality, deep power-down mode (2 µA), and Serial Flash Discoverable Parameter (SFDP) v1.6 compliance for runtime configuration discovery. The device uses a single 1.7–2.0 V supply and supports continuous read with 8/16/32/64-byte wrap addressing.

Key Specifications

Pinout & Package

AT25SL128A-UUE-T 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 W25Q128JVSIM and MX25L12833FZDI-08G, the AT25SL128A-UUE-T uniquely delivers 1.7–2.0 V operation, 133 MHz QPI, and 2 µA deep power-down-making it the only option for energy-constrained, low-voltage XiP applications demanding industrial-grade endurance and retention.

Availability

AT25SL128A-UUE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and medical imaging device code storage requiring stable component supply across extended product lifecycles.

Supply support for AT25SL128A-UUE-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 enterprise applications.

The AT25SL128A-UUE-T belongs to Renesas' AT25SL family of low-voltage serial flash memories engineered for Execute-in-Place operation in resource-constrained, high-reliability embedded systems.

FAQ

What voltage range does the AT25SL128A-UUE-T support, and why is this important for system design?

The AT25SL128A-UUE-T supports a strict 1.7 V to 2.0 V supply range. This narrow window enables direct interfacing with 1.8 V I/O domains of modern microcontrollers and SoCs without level shifters, reducing BOM cost and PCB area. Operating outside this range risks data corruption or failure to enter QPI mode-verified in Renesas' DS-AT25SL128A-109 Rev. T Section 9.1. The AT25SL128A-UUE-T's tight voltage tolerance also ensures consistent timing margins across temperature and process variation.

Does the AT25SL128A-UUE-T support Execute-in-Place (XiP), and what features enable it?

Yes, the AT25SL128A-UUE-T explicitly supports Execute-in-Place (XiP) per its datasheet introduction. Key enablers include Quad I/O (1-4-4) and QPI (4-4-4) modes for high-bandwidth instruction fetch, continuous read with wrap addressing to eliminate command overhead, and 133 MHz maximum read speed for sub-100 ns effective access. These features collectively reduce instruction latency to levels compatible with real-time embedded execution-confirmed in DS-AT25SL128A-109 Rev. T Page 7. The AT25SL128A-UUE-T achieves this without external cache, simplifying system architecture.

How does memory protection work on the AT25SL128A-UUE-T, and can it be configured in-system?

Memory protection on the AT25SL128A-UUE-T is implemented via status register bits BP2–BP0, TB (Top/Bottom), and SEC (Sector/Block granularity), allowing user-definable protected zones at either end of the memory array. Protection is enabled/disabled via the WP pin or software commands (e.g., Write Status Register), and settings persist through power cycles. DS-AT25SL128A-109 Rev. T Sections 6.1 and 7.3–7.5 confirm full in-system configurability without hardware modification. The AT25SL128A-UUE-T thus supports secure bootloader partitioning and field-upgrade-safe firmware layouts.

What package type is used for the AT25SL128A-UUE-T, and what are its assembly advantages?

The AT25SL128A-UUE-T uses an 8-pad DFN package measuring 6 mm × 5 mm × 0.6 mm with wettable flanks. This footprint offers superior thermal performance vs. SOIC, reduced board area vs. WLCSP, and compatibility with standard reflow profiles. Wettable flanks enable automated optical inspection (AOI) of solder joints-critical for automotive and industrial manufacturing. Per DS-AT25SL128A-109 Rev. T Section 11.1, the AT25SL128A-UUE-T's DFN meets IPC/JEDEC J-STD-020 moisture sensitivity level 3, simplifying handling logistics.

Is the AT25SL128A-UUE-T compatible with SFDP v1.6, and how does that benefit firmware development?

Yes, the AT25SL128A-UUE-T implements Serial Flash Discoverable Parameter (SFDP) v1.6 per Section 8.36 of DS-AT25SL128A-109 Rev. T. This allows host systems to auto-detect timing parameters, erase block sizes, and feature flags at runtime-eliminating hardcoded driver tables. Developers gain portability across flash vendors and simplified qualification, as SFDP compliance guarantees standardized register layout and behavior. For the AT25SL128A-UUE-T, SFDP enables plug-and-play integration with Linux MTD, Zephyr, and bare-metal bootloaders without vendor-specific patches.