AT45DB011B-SU Microchip Integrated Circuit (Small Outline Packages) In Stock
AT45DB011B-SU is a 1 Mbit DataFlash serial memory from Microchip featuring SPI interface, 264-byte page size, and 2.7 V operation in an 8-pin SOIC package. Designed for embedded data logging and code storage in low-power systems. From $1.20 in stock, worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- AT45DB011B-SU Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2500(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1 Mbit (128 KB) DataFlash with SPI interface supporting clock rates up to 20 MHz for fast serial data access
- 264-byte page architecture with integrated SRAM buffer enabling efficient byte-level write operations without full-page erase
- 2.7 V to 3.6 V supply operation with ultra-low standby current under 5 µA for battery-powered IoT applications
- 8-pin SOIC small outline package with RoHS-compliant construction for straightforward PCB integration
Applications
The AT45DB011B-SU is used for code shadowing, data logging, and parameter storage in embedded systems such as handheld instruments, sensor nodes, and industrial controllers requiring reliable non-volatile serial flash memory. Its SPI interface and 2.7 V operation make it compatible with a wide range of low-power microcontrollers in IoT and wearable applications. The 264-byte page size with internal SRAM buffer simplifies firmware update routines and incremental data writes without block erase overhead.
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
How much storage capacity does the AT45DB011B-SU provide, and what is its page size organization?
The AT45DB011B-SU offers 1 Mbit (approximately 128 KB) of flash storage organized into pages of 264 bytes each. This page-based architecture with an integrated SRAM buffer allows partial page writes and efficient sequential logging at SPI clock rates up to 20 MHz without requiring a full-block erase cycle before each write.
At what supply voltage does the AT45DB011B-SU operate, and how does this affect its use in battery-powered sensor nodes?
The AT45DB011B-SU operates from 2.7 V to 3.6 V, aligning with single-cell LiPo and regulated 3.3 V supplies common in IoT sensor nodes. Its standby current below 5 µA ensures negligible battery drain when the device is idle between data logging events, extending sensor node runtime by weeks in duty-cycled deployments.
How does the SPI interface of the AT45DB011B-SU compare to parallel flash in a microcontroller-based data logging system?
The AT45DB011B-SU's SPI interface requires only 4 signal lines versus 8 to 16 lines for parallel flash, significantly reducing GPIO usage and PCB routing complexity. Operating at up to 20 MHz SPI clock, it achieves read throughput sufficient for most embedded logging applications while consuming far less board space than parallel alternatives in the 8-pin SOIC package.
Is the AT45DB011B-SU suitable for storing firmware images in a microcontroller bootloader scenario, given its 1 Mbit capacity?
The AT45DB011B-SU's 1 Mbit (128 KB) capacity is appropriate for storing firmware images for small to mid-size microcontrollers with flash budgets under 64 KB, allowing a full firmware backup plus working copy. Its 264-byte pages and SPI access at 20 MHz support typical bootloader read-and-verify cycles in under 50 ms, making it a cost-effective choice for over-the-air update storage.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.9200 | $1.92 |
| 100+ | $1.4400 | $144.00 |
| 1000+ | $1.2500 | $1250.00 |
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