AT45DB642D-TU – 64Mbit SPI Serial Flash Memory – Renesas Electronics

This AT45DB642D-TU SPI Serial Flash Memory IC from Renesas Electronics delivers high-performance, non-volatile storage for embedded systems requiring reliable data retention. Featuring a flexible serial interface and low-voltage operation, it provides an efficient solution for code shadowing, data logging, and configuration storage with fast read/write capabilities.

Key Features

• Memory Size: 64Mbit (8MB) storage capacity
• Interface: High-speed SPI (Serial Peripheral Interface)
• Clock Frequency: 66 MHz operation
• Voltage Range: 2.7V–3.6V (low-power compatible)
• Write Speed: 6ms page write cycle
• Temperature Range: Industrial-grade -40°C to 85°C
• Package: 28-TSSOP surface-mount design

Technical Details

Organized as 8,192 pages of 1,056 bytes each, this SPI flash memory IC utilizes Renesas’ advanced FLASH technology for robust data integrity. The serial interface minimizes pin count while supporting 66 MHz clock rates for rapid data transfer. Its industrial temperature tolerance ensures reliable performance in demanding environments, and the compact 28-TSOP package enables space-efficient PCB layouts.

Common Applications

• Embedded system firmware storage
• Industrial automation configuration modules
• IoT device data logging
• Automotive infotainment systems
• Medical device parameter storage

About Renesas Electronics

Renesas Electronics Corporation is a globally recognized leader in advanced semiconductor solutions, renowned for innovation in microcontrollers, analog, and power devices. With decades of industry expertise, Renesas consistently delivers high-reliability components that meet stringent automotive, industrial, and consumer electronics standards.

Their commitment to quality and technological advancement makes Renesas a preferred partner for mission-critical applications. Products undergo rigorous validation processes, ensuring exceptional performance and longevity even in extreme operating conditions.

About Serial Flash Memory

SPI Serial Flash Memory provides non-volatile storage using a simple 4-wire interface, drastically reducing system complexity compared to parallel alternatives. These ICs retain data without power, making them ideal for boot code, calibration settings, and event recording in space-constrained designs.

Modern serial flash devices offer high-speed access, sector-based erase/write functionality, and low standby power consumption. Their versatility supports diverse applications—from consumer wearables to industrial controllers—where reliable, compact, and cost-effective storage is essential.

Packaging

Available in industry-standard trays for automated assembly processes.

FAQs

Question: Is this flash memory compatible with 3.3V systems?
Answer: Yes, it operates from 2.7V to 3.6V, making it ideal for 3.3V designs.

Question: What is the maximum SPI clock rate supported?
Answer: The AT45DB642D-TU supports clock frequencies up to 66 MHz for fast data transfers.

Question: Does it require external components for write protection?
Answer: Integrated hardware and software write protection features eliminate the need for external circuits.

Question: Is the memory organized in erasable blocks?
Answer: Yes, it supports flexible page (1,056B) and sector erase operations.

Question: How does SPI flash benefit embedded designs?
Answer: SPI interface reduces pin count by 70% vs parallel flash, simplifying layouts and lowering BOM costs.

Question: Can this IC operate in automotive environments?
Answer: While industrial-grade (-40°C to 85°C), verify specific automotive qualifications with Renesas datasheets.

Note: Product images are representational. Refer to datasheet for exact specifications.
Download Full Datasheet

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