AT25DF081-SSHN-B Microchip Integrated Circuit (Small Outline Packages) In Stock
AT25DF081-SSHN-B is a Microchip 8 Mbit SPI NOR Flash memory with a 7 ns read cycle time, operating from a 1.65 V to 1.95 V supply voltage, housed in an 8-pin SOIC package for low-voltage embedded storage applications.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- AT25DF081-SSHN-B Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8 Mbit SPI NOR Flash with fast 7 ns read cycle time for rapid firmware retrieval
- Low-voltage 1.65 V to 1.95 V supply range ideal for 1.8 V MCU and FPGA designs
- SPI serial interface (up to 4-wire) enabling simple connection with minimal GPIO overhead
- 8-pin SOIC package providing compact, industry-standard footprint for easy PCB integration
Applications
AT25DF081-SSHN-B is used for firmware storage and code shadowing in low-power microcontroller systems, IoT edge nodes, and wearable devices operating from 1.8 V supply rails. Its fast 7 ns read cycle suits applications requiring rapid boot or over-the-air firmware update storage, such as wireless sensor hubs and BLE modules. It is also deployed in industrial controllers and smart meter data loggers that need reliable non-volatile storage within a compact 8-pin footprint.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the read access time of AT25DF081-SSHN-B, and how does it benefit firmware boot sequences?
AT25DF081-SSHN-B offers a 7 ns read cycle time, which enables fast sequential reads during firmware boot on MCUs running at up to 100 MHz. This low latency reduces boot time for embedded systems executing code directly from SPI Flash via execute-in-place (XIP) or shadow-copy methods.
What supply voltage range does AT25DF081-SSHN-B require, and which MCU families does it pair well with?
AT25DF081-SSHN-B operates from a 1.65 V to 1.95 V supply, making it directly compatible with 1.8 V ARM Cortex-M, MSP430, and low-power RISC-V MCUs without requiring level-shifting circuitry. This narrow 1.8 V range also suits FPGA configuration memory applications where supply accuracy is maintained by an LDO regulator.
How much non-volatile storage does AT25DF081-SSHN-B provide, and is it sufficient for typical embedded firmware images?
AT25DF081-SSHN-B provides 8 Mbit (1 MB) of NOR Flash storage, which is sufficient for most bare-metal firmware images in the 128 KB to 512 KB range, with room left for over-the-air update dual-bank storage. Applications requiring larger images above 1 MB should consider 16 Mbit or 32 Mbit variants such as AT25DF161.
What serial interface protocol does AT25DF081-SSHN-B use, and how many I/O pins does it consume on the host MCU?
AT25DF081-SSHN-B uses a standard 4-wire SPI interface (CS, SCK, MOSI, MISO), consuming just 4 GPIO pins on the host MCU plus an optional Write Protect pin. This minimal pin count makes it easy to integrate in pin-limited microcontrollers with as few as 8 I/O lines total.
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