UN25N064
64Mb SPI NOR Flash with 104MHz clock, cost-effective solution for boot code and firmware storage.
Product Overview
Description
The UN25N064 provides 64Mb (8MB) of non-volatile storage with SPI interface supporting up to 104MHz clock. It offers an economical solution for boot code and firmware storage in cost-sensitive applications.
The device features uniform 4KB sector erase and software/hardware write protection. Standard SPI interface ensures compatibility with most microcontrollers and processors.
Operating from 2.7V to 3.6V supply, the device supports industrial temperature range (-40C to +85C). Available in compact SOP-8 and WSON-8 packages.
Product Series
UN
Primary Application
Boot code
Key Features
- 64Mb density
- 104MHz SPI
- Cost effective
- Low power
Specifications
| Density | 64Mb (8MB) |
|---|---|
| Interface | SPI |
| Clock Rate | Up to 104MHz |
| Read Speed | Up to 13MB/s |
| Supply Voltage | 2.7V to 3.6V |
| Operating Temperature | -40C to +85C |
| Package | SOP-8, WSON-8 |
Applications
Boot code
Electronic system design
Firmware
Electronic system design
Consumer electronics
Consumer electronics
IoT
Electronic system design
FAE Expert Insights
"The UN25N064 is my go-to recommendation for cost-sensitive boot applications. At under $0.30 in volume, it offers excellent value for basic firmware storage. I have successfully used this in numerous consumer electronics and IoT projects. The 104MHz SPI is adequate for most boot applications, though I recommend the UN25N128 if you need faster boot times. The write protection features work reliably. One consideration: verify your code fits within 8MB with room for growth. I typically recommend this for applications with code size under 6MB."
Cost-effective NOR Flash ideal for budget-conscious designs
— Zhang Ming, BeiLuo
Frequently Asked Questions
Is 64Mb sufficient for my application?
64Mb (8MB) is sufficient for: 1) Simple bootloaders under 1MB. 2) RTOS-based applications under 4MB. 3) Linux kernel with minimal rootfs under 6MB. Calculate your needs: bootloader + kernel + application + 30% margin. If total exceeds 6MB, consider 128Mb. Many IoT and consumer applications fit comfortably in 64Mb.
Calculate total code size with margin. Contact us for code size optimization tips.
What is the difference between UN25N064 and UN25N128?
Main differences: 1) Density: 64Mb vs 128Mb. 2) Clock: 104MHz vs 133MHz. 3) Quad support: UN25N064 has standard SPI only, UN25N128 supports dual/quad. 4) Price: UN25N064 is approximately 40% lower cost. Choose UN25N064 for cost-sensitive applications with moderate performance needs. Choose UN25N128 for larger code or higher performance requirements.
Choose UN25N064 for cost optimization, UN25N128 for performance and capacity.
What is the typical boot time with this Flash?
Boot time depends on code size and interface speed. At 104MHz SPI: 1MB code loads in ~80ms. 4MB code loads in ~320ms. 8MB code loads in ~640ms. For faster boot, consider: 1) Using UN25N128 with 133MHz and quad mode. 2) Compressing code. 3) Loading only critical code initially. 4) Using XIP for non-critical code. Typical embedded systems achieve boot times under 500ms with proper optimization.
For boot time critical applications, consider UN25N128 with quad mode support.
Can this device be used for firmware updates?
Yes, the UN25N064 supports in-system firmware updates. Key considerations: 1) Implement dual-bank scheme for safe updates. 2) Use write protection to prevent corruption. 3) Verify update integrity before activation. 4) Include rollback mechanism. 5) Test update process thoroughly. The device supports sector erase for partial updates. Typical update time: 1-2 seconds for full firmware depending on size.
Implement robust update mechanism with verification and rollback capability.
What is the programming voltage requirement?
The UN25N064 operates from 2.7V to 3.6V supply voltage. Programming and erase operations use the same voltage as read operations - no high voltage required. This simplifies power supply design. The device accepts standard SPI commands for programming. Typical page program time is 0.5-3ms per 256-byte page. Bulk programming can be done efficiently using continuous page program mode.
Ensure your system provides stable 3.3V supply for reliable programming.