AT25DN512C-SSHF-T

The AT25DN512C-SSHF-T is a high-density, 512-Mbit serial non-volatile flash memory from Atmel/Microchip. It uses a low-pin SPI-compatible interface with support for standard SPI as well as Dual I/O and Quad I/O modes, enabling higher data throughput for firmware images and data storage. It operates from 2.7 V to 3.6 V and is available in compact packages (including 8‑pin options) with an industrial temperature variant denoted by the -SSHF-T suffix (package/ordering details vary by supplier). Typical features include fast read, page program, sector and block erase, and hardware protection (e.g., block locking). It is well-suited for embedded applications such as boot code storage, firmware updates, code shadowing, and data logging where compact, non-volatile, high-density memory is required. For exact electrical specs, timing, memory organization, and package data, refer to the AT25DN512C datasheet and product selector.

Direct equivalents (same device, rebrand):
- Microchip 25DN512C (the Microchip/DataFlash rebrand of AT25DN512C-SSHF-T)
Closest cross-vendor options (512Kbit SPI DataFlash with similar footprint):
- Macronix MX25DN512 (or MX25DN512E)
- Renesas F25D512
Note: check each datasheet for exact pinouts, timing, and command set compatibility.

Key features of AT25DN512C-SSHF-T:
- 512 Mbit (64 MBytes) serial NOR flash memory
- Dual I/O and Quad I/O SPI interfaces for higher throughput
- 4‑byte addressing for >16 MB addressing
- Fast read up to ~104 MHz clock; supports multiple read modes
- Page program size: 256 bytes
- Erase architecture: 4 KB sectors; 32 KB and 64 KB blocks; chip erase
- Single-supply voltage: 2.7 V–3.6 V
- Low-power operation with deep power-down mode
- Security features: write-protect regions, hardware protection, and programmable security options (OTP area)
- Data retention up to many years; suitable for robust applications
- Industrial temperature range (-40°C to +85°C)
- Packaging/profile: 8-pin device in SSHF-T (Tape & Reel) options available
Note: exact timing and endurance depend on operating conditions; refer to the datasheet for detailed electrical specs.

- Pin count: 8 pins (8-pin package).
- Function: AT25DN512C-SSHF-T is a 512‑Mbit SPI Serial Flash memory with standard SPI interface. Pins include CS#, SCK, SI (MOSI), SO (MISO), VCC, VSS, WP#, and HOLD#. Example SOIC-8 mapping: 1 CS#, 2 SO/MISO, 3 WP#, 4 GND, 5 DI/MOSI, 6 SCK, 7 HOLD#, 8 VCC.

Manufacturer: Microchip Technology Inc. (the company that acquired Atmel in 2016; AT25DN parts are from the Atmel/DataFlash family).
What kind of company: An American multinational semiconductor company that designs, develops, and manufactures microcontrollers, memory (including serial flash), and other integrated circuits. It is publicly traded on NASDAQ (ticker: MCHP).

AT25DN512C-SSHF-T is a 512-Mbit dual-port serial DataFlash. It supports two independent ports for simultaneous access by two masters, enabling shared nonvolatile memory in multi-processor systems. Typical application areas:
- Dual‑processor/FPGA/MCU systems needing firmware storage and code shadowing
- Boot/config memory for automotive, industrial, and networking equipment
- Data buffering/logging and real-time lookups
- Memory bridge between microcontrollers and peripherals or network processors
- Field-updatable firmware for devices in harsh or distributed environments
Provides nonvolatile storage with high read throughput and a simple SPI interface.

It comes in an 8-pin Small Outline Integrated Circuit package (SOIC), typically 150 mil wide, with Tape-and-Reel packaging (suffix -T).