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AT45DB081B-RC
Microchip Technology
IC FLASH 8MBIT SPI 20MHZ 28SOIC
2317 Pcs New Original In Stock
FLASH Memory IC 8Mbit SPI 20 MHz 28-SOIC
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5.0 / 5.0
- (476 Ratings)
AT45DB081B-RC
Product Overview
1290920
DiGi Electronics Part Number
AT45DB081B-RC-DGManufacturer
Microchip Technology
AT45DB081B-RC
Description
IC FLASH 8MBIT SPI 20MHZ 28SOICInventory
2317 Pcs New Original In Stock
FLASH Memory IC 8Mbit SPI 20 MHz 28-SOIC
Quantity
Minimum 1
Minimum 1
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AT45DB081B-RC Technical Specifications
Category
Memory, Memory
Packaging
-
Series
-
Product Status
Obsolete
DiGi-Electronics Programmable
Not Verified
Memory Type
Non-Volatile
Memory Format
FLASH
Technology
FLASH
Memory Size
8Mbit
Memory Organization
264 Bytes x 4096 pages
Memory Interface
SPI
Clock Frequency
20 MHz
Write Cycle Time - Word, Page
14ms
Voltage - Supply
2.7V ~ 3.6V
Operating Temperature
0°C ~ 70°C (TC)
Mounting Type
Surface Mount
Package / Case
28-SOIC (0.342", 8.69mm Width)
Supplier Device Package
28-SOIC
Base Product Number
AT45DB081
Datasheet & Documents
HTML Datasheet
AT45DB081B-RC-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0071
Additional Information
Standard Package
26
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
網站提供詳細的商品資訊與圖片，即使是第一次購買也能很有信心。
de desembre 02, 2025
Ich schätze die transparente Preisgestaltung, die bei DiGi Electronics stets offen kommuniziert wird.
de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
Their team was very patient and understanding, making complex processes seem simple.
de desembre 02, 2025
Timely delivery and responsive service from DiGi Electronics have reduced our operational worries.
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Frequently Asked Questions (FAQ)
Can I use the AT45DB081B-RC as a direct replacement for the AT45DB161D in an existing SPI flash memory design, and what are the key compatibility risks?
The AT45DB081B-RC is not a direct drop-in replacement for the AT45DB161D due to differences in memory density and page size. The AT45DB081B-RC offers 8Mbit (1MB) organized as 264 bytes per page across 4096 pages, while the AT45DB161D provides 16Mbit (2MB) with larger page sizes (528 bytes). Using the AT45DB081B-RC may require firmware adjustments for address mapping and wear-leveling algorithms, especially in applications near memory capacity limits. Additionally, confirm SPI mode compatibility—both support standard SPI modes, but command set variations (e.g., wrap-around addressing) could impact data integrity if not handled. Verify timing parameters at your system clock frequency and consider future availability, as the AT45DB081B-RC is marked obsolete.
What design-in challenges should I expect with the AT45DB081B-RC given its 2.7V to 3.6V supply range in battery-powered embedded systems?
When integrating the AT45DB081B-RC into battery-powered systems, maintain a stable supply within 2.7V–3.6V to avoid write corruption or unintended resets. Lithium-based batteries start above 3.6V and drop below 3.0V during discharge, so a low-quiescent LDO or buck-boost regulator is essential to stay within spec. Pay attention to peak current during page programming (up to 20mA)—transient voltage drops on weak power rails can cause MCU resets. Include local decoupling (100nF ceramic) close to VCC pins and consider disabling writes during low-battery conditions. Since the AT45DB081B-RC lacks write protection pin by default, implement software-controlled status register checks to prevent partial writes during brown-out events.
How does the AT45DB081B-RC handle SPI bus contention in multi-device systems, and what layout practices improve reliability?
The AT45DB081B-RC relies on standard SPI slave select (SS) signaling to prevent bus contention. Ensure SS is actively driven high when the device is idle to prevent false enablement. Avoid floating inputs by tying unused control pins (e.g., RESET, WP) to VCC or GND via pull-ups/pull-downs. For robust operation with multiple SPI peripherals, keep trace lengths short and use point-to-point routing to minimize crosstalk. Match impedance where possible, especially at 20MHz clock speeds. Add series resistors (22–33Ω) near the driver to reduce ringing. In noisy environments, shield the SPI lines and avoid routing near switching power supplies. Always validate timing margins with worst-case propagation delays across temperature.
Is the AT45DB081B-RC suitable for industrial applications requiring reliable data logging at 70°C operating temperature, and what are the long-term reliability risks?
While the AT45DB081B-RC supports operation up to 70°C, sustained high temperatures accelerate wear-out mechanisms in SPI flash memory. At elevated temperatures, data retention may degrade below the typical 20-year spec—especially after repeated page cycling. The AT45DB081B-RC has no built-in ECC, so bit flips become more likely over time. For continuous data logging, implement host-side ECC and wear leveling to distribute writes across pages. Avoid hot-plugging scenarios that could disrupt ongoing writes. Monitor the status register before and after each write operation. Given the device's obsolete status, consider stock availability and lifetime buy risks for long-term production. Evaluate alternatives like the MX25L8006E (8Mbit SPI NOR) with better industrial support.
What are the implications of using the AT45DB081B-RC in new designs given its obsolete status and RoHS non-compliance, and are there recommended alternatives?
Designing the AT45DB081B-RC into new products poses long-term supply and compliance risks. With its obsolete status and RoHS non-compliance, it's unsuitable for commercial or industrial products targeting global markets. You may face supply chain interruptions and additional import compliance hurdles. For replacement, consider the Winbond W25Q80JV (8Mbit SPI NOR), which is RoHS-compliant, widely available, pin-compatible in 28-SOIC, and supports SPI speeds up to 104MHz. Verify command set compatibility—W25Q80JV uses standard opcodes, while the AT45DB081B-RC uses proprietary commands—requiring firmware updates. Evaluate endurance (100k vs 10k write cycles) and data retention improvements in modern alternatives to ensure reliability in your application.
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AT45DB081B-RC CAD Models
Microchip Technology AT45DB081B-RC PCB symbols & footprints
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