Microchip Technology AT25HP512W210SU2.7

Overview

AT25HP512W210SU2.7 from Atmel (now Microchip Technology) is a 512 Kbit serial SPI EEPROM organized as 65,536 × 8-bit words, supporting 1.8V–5.5V operation with 2 MHz clock rate at 1.8V, 5 MHz at 2.7V, and 10 MHz at 5V. It features hardware/software write protection, 128-byte page write mode, and operates across –40°C to +85°C for industrial embedded systems requiring nonvolatile data logging and configuration storage.

For engineers reviewing the AT25HP512W210SU2.7 datasheet, AT25HP512W210SU2.7 pinout, AT25HP512W210SU2.7 application, or AT25HP512W210SU2.7 equivalent, key selection criteria include verified 128-byte page write timing, block protection granularity (1/4, 1/2, or full array), WP/HOLD pin behavior under low-voltage conditions, and compatibility with SPI Mode 0/3 in resource-constrained microcontroller interfaces.

Technical Context

The AT25HP512W210SU2.7 implements a synchronous SPI slave interface with separate SI/SO lines, MSB-first data framing, and op-code–driven command execution (WREN, WRITE, RDSR, WRSR). It requires explicit Write Enable before programming and supports automatic address increment during page writes.

Its status register (BP1/BP0/WPEN/RDY/WEN) controls nonvolatile block protection and write-enable state; hardware write protection via WP pin is conditional on WPEN=1. The HOLD pin suspends ongoing serial transfers without resetting sequence state, and all internal write cycles are self-timed with no external erase step required.

Key Specifications

Pinout & Package

AT25HP512W210SU2.7 is packaged in an 8-lead SOIC Array Package (SAP), 6.00 mm × 4.90 mm body, RoHS-compliant and lead-free ("U" suffix), with gull-wing leads and marked Pin 1 identifier.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95512-DFMN6TP and AT25SF512A-SHN-T, the AT25HP512W210SU2.7 uniquely combines HOLD pin support, true EEPROM byte-write semantics (via 128-byte page), and SAP package for space-constrained layouts - making it optimal for deterministic, low-overhead configuration storage in real-time embedded systems.

Availability

AT25HP512W210SU2.7 is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, and smart energy meters requiring stable component supply, long-life data retention, and RoHS-compliant packaging.

Supply support for AT25HP512W210SU2.7 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

Microchip Technology (formerly Atmel) is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer markets.

The AT25HP512W210SU2.7 belongs to the AT25HP serial EEPROM family, designed specifically for high-reliability, low-voltage embedded systems needing fast, flexible, and secure nonvolatile data storage with minimal host resource usage.

FAQ

What is the function of the HOLD pin on the AT25HP512W210SU2.7?

The HOLD pin on the AT25HP512W210SU2.7 suspends ongoing SPI communication without resetting the internal address counter or command state. When asserted low while SCK is low, it pauses data transfer; resuming requires bringing HOLD high while SCK remains low. This feature is used in AT25HP512W210SU2.7 to allow the host MCU to handle interrupts or bus arbitration mid-sequence, preserving transaction integrity without reinitialization.

Does the AT25HP512W210SU2.7 support true byte-write operations?

No, the AT25HP512W210SU2.7 supports only 128-byte page write mode - not individual byte writes. Attempting to write fewer than 128 bytes within a page leaves the remaining bytes in that page undefined. The AT25HP512W210SU2.7 requires full-page writes for guaranteed data integrity, and the address counter auto-increments within the 128-byte boundary before rolling over.

How does write protection work on the AT25HP512W210SU2.7?

Write protection on the AT25HP512W210SU2.7 is implemented through both hardware (WP pin) and software (status register BP0/BP1 bits). Hardware protection is enabled only when WPEN=1 and WP is low; software protection configures which memory segments (none, top 1/4, top 1/2, or full array) are read-only. The AT25HP512W210SU2.7 enforces both layers simultaneously - for example, WP low + WPEN=1 blocks all writes to protected regions and the status register itself.

What package type is used for the AT25HP512W210SU2.7?

The AT25HP512W210SU2.7 uses an 8-lead SOIC Array Package (SAP), also referenced as 8Y4, with dimensions 6.00 mm × 4.90 mm and 1.27 mm lead pitch. It is RoHS-compliant and lead-free ("U" suffix), featuring gull-wing leads and a marked Pin 1 index area - distinct from standard SOIC or PDIP footprints.

Is the AT25HP512W210SU2.7 compatible with SPI Mode 1 or Mode 2?

No, the AT25HP512W210SU2.7 explicitly supports only SPI Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), as confirmed in its official documentation. It does not operate in Mode 1 (CPOL=0, CPHA=1) or Mode 2 (CPOL=1, CPHA=0). Host systems must configure their SPI controller accordingly; using unsupported modes will result in communication failure or corrupted data transfers with the AT25HP512W210SU2.7.