Renesas AT25PE80-SHN-B

Overview

AT25PE80-SHN-B from Microchip Technology is an 8-Mbit serial Flash memory with SPI interface, 256/264-byte page size, dual 256/264-byte SRAM buffers, and RapidS™ high-speed read capability up to 85 MHz. It operates from 1.7V–3.6V, supports industrial temperature range (−40°C to +85°C), and is packaged in 8-lead SOIC (0.208" wide). It serves as nonvolatile storage for firmware, configuration data, and audio/image assets in embedded systems.

For engineers reviewing the AT25PE80-SHN-B datasheet, AT25PE80-SHN-B pinout, AT25PE80-SHN-B application, or AT25PE80-SHN-B equivalent, key selection criteria include its dual-buffer interleaved write architecture, ultra-low 300nA deep power-down current, flexible erase granularity (page/2KB block/64KB sector/chip), and hardware write protection via WP pin.

Technical Context

The AT25PE80-SHN-B implements a sequential-access DataFlash®-Lite architecture with two independent SRAM buffers enabling concurrent receive-and-program operation. Its SPI interface supports modes 0 and 3, with four distinct continuous read opcodes (01h, 03h, 0Bh, 1Bh) optimized for low-power, standard, high-frequency, and ultra-high-frequency operation respectively.

Memory organization comprises 4,096 pages of 256 bytes (default) or 264 bytes (customer-selectable), totaling 8,650,752 bits. Erase operations are fully self-timed and support page (256/264 B), block (2 KB), sector (64 KB), and chip (8 Mbit) levels - all executed without external high-voltage programming signals.

Key Specifications

Pinout & Package

AT25PE80-SHN-B is supplied in an 8-lead SOIC package (0.208" wide, JEDEC MS-012AC), with pins arranged as follows:

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25PE80-SHN-B, AT25SF041-SSHD-B offers faster read speed but half the capacity and no dual-buffer write acceleration, while W25Q80DVSSIQ provides broader SPI mode flexibility but requires additional firmware overhead to replicate AT25PE80-SHN-B's seamless read-modify-write and hardware write lock behavior.

Availability

AT25PE80-SHN-B is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive infotainment, and smart metering applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AT25PE80-SHN-B 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

Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, Flash memory, and security ICs, with a focus on robust, long-lifecycle components for industrial and automotive markets.

The AT25PE80-SHN-B belongs to Microchip's DataFlash®-Lite family - engineered specifically for sequential-access, high-reliability embedded storage where low pin count, ultra-low power, and concurrent read/write operation are essential.

FAQ

What is the default page size configuration for the AT25PE80-SHN-B?

The AT25PE80-SHN-B ships with a default page size of 256 bytes. A customer-selectable 264-byte page option is available at order time and affects address bit allocation (20-bit vs. 21-bit addressing), buffer addressing (BFA7–BFA0 vs. BFA8–BFA0), and dummy byte count in read/write commands. The AT25PE80-SHN-B datasheet specifies exact timing and opcode variations for both configurations.

Does the AT25PE80-SHN-B support Quad SPI or only standard SPI?

The AT25PE80-SHN-B supports only standard 3-wire SPI (CS, SCK, SI, SO) in modes 0 and 3. It does not implement Quad SPI, Dual SPI, or QPI interfaces. Its RapidS™ enhancement increases clock rate to 85 MHz within standard SPI timing constraints, and all commands use single-bit I/O on SI and SO lines. The AT25PE80-SHN-B pinout and functional description confirm absence of IO2/IO3 pins required for quad operation.

How does the dual-buffer architecture of the AT25PE80-SHN-B improve write performance?

The AT25PE80-SHN-B's two independent 256/264-byte SRAM buffers allow one buffer to accept incoming data via SPI while the other buffer simultaneously programs data into main memory - enabling true interleaved operation. This eliminates the traditional "stop-and-wait" write bottleneck, sustaining continuous data streams in audio buffering, firmware patching, or sensor logging. The AT25PE80-SHN-B achieves this without external DMA or host intervention.

What is the purpose of the RESET pin on the AT25PE80-SHN-B, and is it mandatory to use?

The RESET pin on the AT25PE80-SHN-B provides hardware-level abortion of ongoing program/erase operations and forces the internal state machine back to idle. It is not mandatory: the AT25PE80-SHN-B includes an internal power-on reset circuit, and normal operation proceeds without external RESET assertion. If unused, the pin must be externally held high per datasheet recommendation - leaving it floating is discouraged due to potential noise-induced resets.

Can the AT25PE80-SHN-B be used in place of standard NOR Flash in existing designs?

The AT25PE80-SHN-B is not a drop-in replacement for parallel NOR Flash due to its sequential-access DataFlash®-Lite architecture and lack of random-address capability. It requires SPI-based firmware drivers and supports only page-aligned reads/writes - not byte-random access. However, for new designs targeting firmware storage, logging, or media buffering, the AT25PE80-SHN-B offers superior power efficiency, smaller footprint, and enhanced streaming write performance compared to conventional NOR Flash.