Microchip Technology AT25FS010N-SH27-B

Overview

AT25FS010N-SH27-B from Microchip Technology is a 1 Mbit (131,072 × 8) serial SPI Flash memory IC optimized for industrial embedded systems requiring low-voltage operation (2.7V–3.6V), fast 50 MHz read access, and robust data retention. It features sector/block/page erase architecture, hardware/software write protection, and operates across –40°C to +85°C.

For engineers reviewing the AT25FS010N-SH27-B datasheet, AT25FS010N-SH27-B pinout, AT25FS010N-SH27-B application, or AT25FS010N-SH27-B equivalent, this device serves as a drop-in replacement for legacy SPI NOR Flash in firmware storage, boot code execution, and configuration data logging where JEDEC-compliant identification, 256-byte page programming, and self-timed erase cycles are critical.

Technical Context

The AT25FS010N-SH27-B implements a synchronous SPI slave interface with dedicated SI/SO pins, supporting Modes 0 and 3 at up to 50 MHz. Its internal architecture divides memory into four uniform 32 KB blocks, each containing eight 4 KB sectors and 256-byte pages - enabling granular erase/program control without disturbing adjacent data.

All write operations (PROGRAM, SECTOR ERASE, BLOCK ERASE, CHIP ERASE, WRSR) require prior WREN instruction activation and are fully self-timed. Status register bits (RDY, WEN, BP0–BP4, WPEN) provide real-time readiness feedback and configurable block-level write protection, with hardware lockout via the WP pin when WPEN = 1.

Key Specifications

Pinout & Package

AT25FS010N-SH27-B uses an 8-lead JEDEC-standard 150-mil SOIC package (package code 8S1), lead-free/halogen-free with NiPdAu finish. Pin 1 is marked by a dot on the top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q80DVSSIG and S25FL008A0XMFI00, the AT25FS010N-SH27-B offers precise 1 Mbit capacity with integrated HOLD and WP pins, deterministic 50 MHz timing, and simpler status register-based protection - making it optimal for cost-sensitive, thermally demanding, or legacy SPI-only systems where minimal firmware changes are mandatory.

Availability

AT25FS010N-SH27-B is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive body electronics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AT25FS010N-SH27-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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on reliability, longevity, and industrial-grade qualification.

The AT25FS010N-SH27-B belongs to Microchip's AT25FS family of high-reliability SPI Flash memories designed specifically for embedded firmware storage in harsh environments where voltage tolerance, data integrity, and long-term availability are critical.

FAQ

What is the maximum clock frequency supported by the AT25FS010N-SH27-B?

The AT25FS010N-SH27-B supports a maximum SCK clock frequency of 50 MHz for both READ and FAST READ operations. This is specified across the full operating voltage range (2.7 V to 3.6 V) and temperature range (–40°C to +85°C), enabling high-speed firmware access in real-time embedded systems. AC characteristics confirm tWH/tWL ≥ 9 ns, consistent with 50 MHz timing margins.

Does the AT25FS010N-SH27-B support SPI Mode 3 (1,1) in addition to Mode 0 (0,0)?

Yes, the AT25FS010N-SH27-B explicitly supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as stated in its official features list. While the datasheet timing diagrams and functional description focus on Mode 0, the device's input sampling and output timing are designed to comply with JEDEC-standard SPI slave behavior for both modes, ensuring interoperability with diverse microcontroller SPI peripherals.

How does hardware write protection work on the AT25FS010N-SH27-B?

Hardware write protection on the AT25FS010N-SH27-B is enabled by asserting the WP pin low *and* setting the WPEN bit (bit 7) in the status register to "1". When active, this combination inhibits all writes to the status register - including BP bits and WPEN itself - and locks protected memory blocks to read-only access. If WPEN = 0, the WP pin is ignored, allowing full register and memory write capability regardless of WP state.

What is the purpose of the HOLD pin on the AT25FS010N-SH27-B?

The HOLD pin on the AT25FS010N-SH27-B suspends ongoing SPI communication without resetting the internal command sequence or address counter. When asserted low while SCK is low, it places SO in high-impedance state and ignores SI inputs, allowing the master to pause transfers (e.g., during interrupt servicing) and resume seamlessly upon deassertion - preserving byte alignment and eliminating re-synchronization overhead in time-critical applications.

Can the AT25FS010N-SH27-B be used in place of the AT25FS010N-SH27-T?

Yes, the AT25FS010N-SH27-B and AT25FS010N-SH27-T share identical electrical, thermal, and functional specifications - differing only in packaging format: "-B" denotes bulk packaging, while "-T" indicates tape-and-reel (4,000 units per reel for SOIC). Both use the same 8S1 SOIC package, operate across –40°C to +85°C, and support identical SPI commands, timing, and protection features - making them functionally interchangeable in design and production.