SST25VF020B-80-4I-SAE

2 Mbit SPI serial flash memory, 80MHz, 4KB uniform sectors, 2.7-3.6V, -40~85°C, SOIC-8

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Manufacturer Part：

SST25VF020B-80-4I-SAE

Package：

SOIC-8 (SAE, 200 mil)

Description

Product Overview

The SST25VF020B-80-4I-SAE is a 2 Mbit (256KB) serial flash memory from Microchip Technology (formerly SST – Silicon Storage Technology). It features a standard SPI interface with single, dual, and quad I/O support for high-speed data transfer. With 80MHz clock frequency and uniform 4KB sectors, this device is ideal for code storage in embedded systems. The 4I variant operates over the industrial temperature range of -40°C to +85°C and is packaged in the SAE (SOIC-8) package. It supports Software Write Protect and Block Protection features.

Key Specifications

Manufacturer	Microchip Technology (SST)
Product Category	SPI Serial Flash Memory
Density	2 Mbit (256 KBytes)
Interface	SPI (Serial Peripheral Interface)
Data Transfer Modes	SPI, Dual I/O, Quad I/O
Maximum Clock Frequency	80 MHz
Sector Size	4 KB (uniform sectors)
Block Size	32 KB / 64 KB
Page Size	256 bytes
Voltage Supply Range	2.7V to 3.6V
Page Program Time	1.5 ms typical
Sector Erase Time	25 ms typical
Chip Erase Time	50 ms typical
Endurance	100,000 cycles (min)
Data Retention	20 years (typical)
Operating Temperature	-40°C to +85°C (industrial)
Package	SOIC-8 (SAE) – 200 mil body

Features

2 Mbit serial flash memory with SPI interface
Single, Dual, and Quad I/O SPI modes
High speed: 80 MHz clock frequency
Uniform 4KB sector architecture
Low voltage operation: 2.7V to 3.6V
Software Write Protect (SWP)
Block Protection: top/bottom, 4KB, 32KB, 64KB
JEDEC Standard Manufacturer ID
Auto Address Increment (AAI) programming
Low power consumption
Active current: 15mA typical (read at 80MHz)
Standby current: 5μA typical
Deep power-down mode: 0.5μA typical
High endurance: 100,000 cycles minimum
20 years data retention
Industrial temperature range: -40°C to +85°C
RoHS compliant SOIC-8 package

Applications

Firmware and boot code storage
Consumer electronics
Networking equipment
Industrial control systems
Automotive electronics
Set-top boxes and digital TVs
Wireless communication devices
Data logging and parameter storage

Product Introduction:SST25VF020B-80-4I-SAE Product Introduction

The SST25VF020B-80-4I-SAE is a 2-megabit (256KB) serial flash memory device manufactured by Microchip Technology (originally from Silicon Storage Technology – SST). It features a standard Serial Peripheral Interface (SPI) with support for Single, Dual, and Quad I/O modes, enabling high-speed data transfer at clock frequencies up to 80 MHz. The device has a uniform 4KB sector architecture with 64 sectors total, offering flexible erase options including 4KB sector erase, 32KB block erase, 64KB block erase, and full chip erase. Program operations are supported via Byte-Program and Auto Address Increment (AAI) Word-Program modes. The SST25VF020B includes comprehensive write protection features including Software Write Protect (SWP), Block Protection for top/bottom 4KB, 32KB, and 64KB blocks, and a Write Protect (WP) pin for hardware protection. Operating from a 2.7V to 3.6V power supply with very low active and standby current consumption, this device is ideal for portable and battery-powered applications. The 4I industrial temperature variant operates reliably from -40°C to +85°C. Packaged in an 8-pin SOIC (SAE, 200 mil body width), this flash memory is widely used for storing firmware, boot code, configuration data, and user parameters in a broad range of consumer, industrial, networking, and automotive applications.

Working Principle:SST25VF020B-80-4I-SAE Working Principle

The SST25VF020B is a NOR-type serial flash memory that stores data using floating-gate transistor technology. Each memory cell contains a floating gate surrounded by oxide insulation. Programming (writing) is accomplished by injecting electrons onto the floating gate through Fowler-Nordheim tunneling, which raises the threshold voltage of the transistor, representing a logic ‘0’. Erasing removes electrons from the floating gate via tunneling, returning the transistor to its low-threshold state, representing a logic ‘1’. The device communicates with a host controller through a 4-wire SPI interface (CE, SCK, SI, SO) which can be expanded to Dual I/O and Quad I/O modes for faster data transfer. All operations including read, program, and erase are initiated through standard SPI command sequences. The internal state machine handles the timing and algorithms for program and erase operations automatically, with status register bits indicating operation progress. Write protection features prevent accidental writes/erases by locking specific memory regions via command or hardware pin. The device features uniform 4KB sectors, allowing fine-grained erase granularity, and supports high-speed operations with 80MHz clock for fast read access.

Pin Description:SST25VF020B-80-4I-SAE Pin Definition and Functions

Pin Number	Pin Name	Description
1	CE#	Chip Enable Input (active low)
2	SO	Serial Data Output (MISO)
3	WP#	Write Protect Input (active low)
4	VSS	Ground
5	SI	Serial Data Input (MOSI)
6	SCK	Serial Clock Input
7	HOLD#	Hold Input (suspends serial communication)
8	VDD	Power Supply (2.7V to 3.6V)

Application Scenarios:In which products and applications isSST25VF020B-80-4I-SAE used

Firmware storage for microcontrollers and processors
Boot code storage in embedded systems
Consumer electronics products
Networking and telecom equipment
Industrial control and automation
Automotive electronics systems
Set-top boxes and digital television
Data logging and parameter storage

Alternative Models:What chips are recommended as replacements for SST25VF020B-80-4I-SAE

Model	Manufacturer	Description
W25Q32JV	Winbond	32Mbit SPI flash, 133MHz, SOIC-8
GD25Q16	GigaDevice	16Mbit SPI flash, 120MHz, SOIC-8
MX25L3206E	Macronix	32Mbit SPI flash, 86MHz, SOIC-8
AT25DF041A	Adesto/Dialog	4Mbit serial flash, 85MHz, SOIC-8
SST25VF040B	Microchip	4Mbit version, same family