Microchip Technology AT25F512N-10SI-2.7

Overview

AT25F512N-10SI-2.7 from Atmel (now Microchip) is a 512 Kbit serial Flash memory IC organized as 65,536 × 8 bits, operating via SPI interface in Modes 0 and 3 at up to 20 MHz, with 2.7–3.6 V supply, sector-based write protection, and self-timed erase/program cycles - deployed in industrial microcontroller boot code storage and firmware update modules.

For engineers reviewing the AT25F512N-10SI-2.7 datasheet, AT25F512N-10SI-2.7 pinout, AT25F512N-10SI-2.7 application, or AT25F512N-10SI-2.7 equivalent, key selection considerations include JEDEC SOIC-8 package compatibility, 2.7 V minimum VCC operation, sector-level hardware/software write protection, and SPI timing compliance for embedded host MCU integration.

Technical Context

The AT25F512N-10SI-2.7 implements a synchronous SPI slave interface with dedicated SI/SO pins, CS-controlled selection, and HOLD/ WP pins for communication suspension and hardware write lockout. It uses an 8-bit instruction register with MSB-first data transfer and supports WREN/WRDI/RDSR/WRSR/READ/PROGRAM/SECTOR ERASE/CHIP ERASE op-codes.

Memory architecture comprises two 32 KB sectors (total 64 KB addressable space), each containing 128 pages of 256 bytes. Status register bits BP0/BP1 enable full-array protection; WPEN bit controls hardware write protect functionality. All write cycles - including status register updates - are self-timed and nonvolatile.

Key Specifications

Pinout & Package

AT25F512N-10SI-2.7 is housed in an 8-lead JEDEC SOIC package (8S1), 0.150" wide body, gull-wing lead form, compatible with standard surface-mount assembly processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25F512N-10SI-2.7, AT25DF041A-SSHN-B offers greater density and speed but removes HOLD functionality, while M95M02-DRMN6TP/K trades bandwidth for ECC-based reliability - both require validation of sector protection mapping and status register compatibility before substitution.

Availability

AT25F512N-10SI-2.7 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.

Supply support for AT25F512N-10SI-2.7 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

Atmel Corporation, now part of Microchip Technology, designs high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and consumer markets.

The AT25F512N-10SI-2.7 belongs to the AT25F serial Flash family, engineered specifically for low-voltage, SPI-based embedded firmware storage with robust hardware/software write protection for mission-critical updates.

FAQ

What is the maximum SPI clock frequency supported by the AT25F512N-10SI-2.7?

The AT25F512N-10SI-2.7 supports a maximum SCK clock frequency of 20 MHz under recommended operating conditions (VCC = 2.7 V to 3.6 V, TA = −40°C to +85°C). This value is specified in the AC Characteristics table and verified across temperature and voltage ranges - exceeding it may cause command rejection or data corruption. The AT25F512N-10SI-2.7 does not support higher frequencies even with tighter timing margins.

Does the AT25F512N-10SI-2.7 support SPI Mode 1 or Mode 2?

No, the AT25F512N-10SI-2.7 explicitly supports only SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in the Features section and Functional Description. Attempting Mode 1 or Mode 2 will result in incorrect data sampling or command misinterpretation because the device's internal timing logic is hardwired to those two modes only.

How many sectors does the AT25F512N-10SI-2.7 have, and what is their size?

The AT25F512N-10SI-2.7 contains exactly two sectors, each 32 KB in size (64 KB total), as defined in the Sector Architecture description and Table 7. This differs from the AT25F1024 variant, which has four 32 KB sectors. Sector boundaries are fixed at 000000–007FFF (Sector 1) and 008000–00FFFF (Sector 2); no partial-sector erase capability exists.

Can the AT25F512N-10SI-2.7 be used with a 2.5 V supply?

No, the AT25F512N-10SI-2.7 requires a minimum supply voltage of 2.7 V, as stated in the Absolute Maximum Ratings and DC Characteristics tables. Operation below 2.7 V violates the specified operating range and may cause unpredictable behavior, including failed write cycles, corrupted reads, or inability to enter standby mode. The "-2.7" suffix denotes the 2.7 V minimum, not compatibility with lower voltages.

Is the HOLD pin functional during a write cycle on the AT25F512N-10SI-2.7?

Yes, the HOLD pin remains fully functional during active write cycles (including PROGRAM, SECTOR ERASE, and WRSR operations) on the AT25F512N-10SI-2.7. When asserted low while SCK is low, HOLD suspends the serial interface without aborting the internal self-timed operation - the device resumes communication upon HOLD deassertion, and the write completes autonomously. This behavior is documented in the HOLD section and timing diagrams.