AT45DB011D-SSH Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip AT45DB011D-SSH is a 1Mbit SPI DataFlash serial Flash memory operating from 2.7V to 3.6V at up to 66 MHz, organized in 512-byte programmable pages. Offers built-in SRAM page buffers and hardware write-protect in a compact SOIC-8 package.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- AT45DB011D-SSH Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1Mbit (1M bits) SPI DataFlash with 66 MHz max clock frequency for fast serial read and program operations
- Low operating voltage range of 2.7V to 3.6V compatible with 3.3V embedded microcontroller systems without level shifting
- Dual internal 512-byte SRAM page buffers enabling continuous background write operations while reading from main Flash array
- Built-in hardware and software write-protect features safeguarding critical firmware or calibration data from accidental overwrite
- Compact SOIC-8 package (SSH) measuring approximately 5 mm x 4 mm for space-efficient PCB integration in portable devices
Applications
The AT45DB011D-SSH is well-suited for data logging, firmware storage, and configuration parameter retention in low-power embedded systems and IoT sensor nodes operating from a 3.3V supply. Its dual-buffer architecture allows continuous data streaming from a microcontroller to Flash without interrupting ongoing read operations, making it useful in audio recording, metering, and wearable device applications. The compact SOIC-8 footprint and low operating current make it an efficient choice for battery-powered handheld instruments.
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 maximum SPI clock frequency of the AT45DB011D-SSH, and which microcontroller interfaces does it support?
The AT45DB011D-SSH supports a maximum SPI clock frequency of 66 MHz, allowing fast page reads and program operations over the standard SPI bus. It is compatible with all microcontrollers that provide a 4-wire SPI interface (SCK, MOSI, MISO, CS), including ARM Cortex-M, AVR, PIC, and MSP430 families operating at 2.7V to 3.6V supply voltages.
How do the dual internal SRAM page buffers of the AT45DB011D-SSH benefit continuous data logging applications?
The AT45DB011D-SSH contains two internal 512-byte SRAM buffers. While one buffer receives incoming data from the host microcontroller via SPI, the second buffer can simultaneously program its contents to the main 1Mbit Flash array. This double-buffering allows continuous data logging at rates consistent with the 66 MHz SPI interface without requiring the host to pause and wait for each Flash programming cycle to complete.
What operating voltage range does the AT45DB011D-SSH support, and how does this affect 3.3V system design?
The AT45DB011D-SSH operates from 2.7V to 3.6V, making it directly compatible with 3.3V power rails common in modern embedded systems. Designers do not need external level-shifting or voltage translation circuits between the Flash and a 3.3V microcontroller, simplifying the BOM and reducing PCB area. The low minimum voltage of 2.7V also permits operation as a lithium-ion cell discharges to near its end-of-discharge voltage.
In which space-constrained portable designs does the AT45DB011D-SSH SOIC-8 package provide a footprint advantage over larger Flash packages?
The SOIC-8 package of the AT45DB011D-SSH (SSH suffix) measures approximately 5 mm x 4 mm, which is significantly smaller than 16-pin or 20-pin packages used by higher-density Flash devices. For wearable health monitors, compact data loggers, and handheld instruments where PCB area is limited to 30 mm x 20 mm or less, the SOIC-8 footprint allows the 1Mbit DataFlash to fit alongside a microcontroller and power regulator without dominating the board layout.
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