BY25D80ASTJG(R)

Memory IC Overview

The BY25D80AS is an 8M-bit SPI NOR Flash memory supporting Standard and Dual SPI interfaces. It operates on a single 2.7V to 3.6V supply. Key performance metrics include a Normal Read clock rate of 55MHz, Fast Read and Dual Read rates of 108MHz, and a maximum active current of 20mA. The device features a flexible architecture with 4KB sectors and 32/64KB blocks. Program/Erase speeds are characterized by a typical page program time of 0.7ms, sector erase of 100ms, block erase of 0.3s or 0.5s, and chip erase of 8s.

Memory IC Feature Summary

• Supports Standard SPI and Dual SPI modes for data transfer at up to two times the standard rate.
• Provides hardware and software write protection mechanisms including status register locking and block protection.
• Includes a Deep Power-Down mode to minimize standby current consumption for battery-powered applications.
• Features a unique 64-bit factory-set ID number for system security and anti-cloning purposes.

Memory IC Applications

• Consumer electronics requiring non-volatile code storage
• Industrial control systems needing reliable firmware retention
• Automotive embedded applications demanding wide temperature range operation
• Network infrastructure equipment utilizing high-speed read capabilities

Memory IC Procurement Notes

Verify the specific package variant (SOP8, TSSOP8, or USON8) required for your design, as the datasheet lists multiple options. Confirm the temperature grade (Commercial, Industrial -40 to +85°C, or Extended Industrial -40 to +105°C) matches your environmental specifications. Ensure the ordering suffix corresponds to the exact pin configuration and material compliance needed for your manufacturing process.

Memory IC Selection Notes

Select this component when an 8M-bit capacity is sufficient for application requirements. Choose based on the necessary interface speed; Dual SPI offers higher throughput than Standard SPI. Consider the operating temperature range required by your environment. Evaluate the package size constraints to determine between SOP8, TSSOP8, or USON8 form factors. Verify voltage compatibility with the 2.7V to 3.6V supply rail.

Memory IC Part Context

The BY25D80AS belongs to the BYTe Semiconductor SPI NOR Flash family. It shares architectural similarities with other devices in the series, such as the BY25Q16BSSIG and BY25D16ASSIG, which offer different densities like 16M-bit. These components generally utilize similar SPI command sets and protection features but differ in memory capacity and potentially supported package types.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-referencing with other manufacturers requires independent verification of electrical characteristics and pinouts.

Memory IC FAQ

How does the Write Protect feature function?

The device supports both hardware and software write protection. Hardware protection is activated by driving the /WP pin low, which locks the Status Register bits. Software protection allows selective locking of memory sectors or blocks via the BP2, BP1, and BP0 bits in the Status Register.

What is the purpose of the Unique ID Number?

The Read Unique ID Number instruction accesses a factory-set, read-only 64-bit number unique to each device. This ID can be used by user software to prevent copying or cloning of the system.

How is the device reset during power-up?

A Power-On Reset (POR) circuit prevents inadvertent write operations. The device does not respond to instructions until VCC reaches the POR threshold voltage. After power-up, the device remains deselected until a falling edge is detected on the Chip Select (/CS) line.