SST25VF020B-80-4I-SAE-T

Memory IC Overview

The SST25VF020B-80-4I-SAE-T is a 2-Mbit SPI Serial Flash memory manufactured by Microchip Technology using SuperFlash technology. It operates within a voltage range of 2.7V to 3.6V and supports clock frequencies up to 80 MHz via SPI Mode 0 and Mode 3. The device features a 256K x 8 organization, uniform 4-Kbyte sectors, and 32/64-Kbyte overlay blocks. It includes hardware write protection, AAI programming, and hold functionality. The industrial temperature grade (-40°C to +85°C) is housed in an 8-lead SOIC package.

Memory IC Feature Summary

• SuperFlash technology provides high endurance and data retention with low power consumption.
• SPI interface supports standard and high-speed read operations up to 80 MHz.
• Flexible erase architecture allows sector, block, or chip-level erasing.
• Hardware and software write protection mechanisms ensure data integrity.

Memory IC Applications

• Firmware storage for microcontrollers
• Code execution from XIP (Execute-In-Place)
• Data logging applications

Memory IC Procurement Notes

Verify the specific suffix '4I' confirms the industrial temperature range and 'SAE' denotes the tape-and-reel packaging format. Confirm the datasheet revision matches the production lot. Ensure ESD precautions are observed during handling as the device is moisture sensitive.

Memory IC Selection Notes

Select this part when an industrial temperature range is required alongside high-speed serial access. The 80 MHz capability suits systems needing rapid firmware updates. Verify that the system voltage aligns with the 2.7V to 3.6V operating window. Consider the 8-pin SOIC footprint for PCB layout constraints.

Memory IC Part Context

This component belongs to the SST25VF series of SPI Serial Flash memories. It utilizes split-gate cell design for improved reliability compared to alternative approaches. The family offers various densities and packages, with this specific model focusing on industrial robustness and high-speed performance.

Memory IC Replacement Considerations

Check for pin-compatible alternatives within the SST25VF family such as SST25VF010B or SST25VF040B if density changes are acceptable. Verify that any substitute maintains the 80 MHz speed grade and industrial temperature rating.

Memory IC FAQ

How does the HOLD# pin function?

The HOLD# pin pauses serial communication without resetting the device. It requires CE# to be active-low and synchronizes with the SCK signal to enter and exit the hold state.

What is the purpose of the WP# pin?

The WP# pin enables or disables the lock-down function of the Block Protection bits in the STATUS register, providing hardware-assisted write protection.