Microchip Technology SST25VF020B-80-4I-Q3AE-T

Overview

SST25VF020B-80-4I-Q3AE-T from Microchip Technology is a 2-Mbit SPI serial Flash memory IC with single-supply 2.7V–3.6V operation, 80 MHz high-speed read capability, and industrial temperature range (–40°C to +85°C). It features uniform 4-Kbyte sectors, 32-Kbyte and 64-Kbyte overlay blocks, and Auto Address Increment (AAI) programming for accelerated firmware updates in embedded microcontroller systems.

For engineers reviewing the SST25VF020B-80-4I-Q3AE-T datasheet, SST25VF020B-80-4I-Q3AE-T pinout, SST25VF020B-80-4I-Q3AE-T application, or SST25VF020B-80-4I-Q3AE-T equivalent, key selection considerations include SPI Mode 0/3 compatibility, hardware/software write protection granularity, sector/block erase timing (18 ms typical), low active current (10 mA), and industrial-grade reliability (100,000 program/erase cycles, >100 years data retention).

Technical Context

The SST25VF020B-80-4I-Q3AE-T implements a four-wire SPI interface with CE#, SCK, SI, and SO signals, supporting both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) clocking. Its SuperFlash® split-gate CMOS technology enables faster erase (35 ms chip erase) and lower energy per operation versus conventional Flash.

It integrates dual software status registers: STATUS register (BP0/BP1/BPL/AAI/BUSY/WEL bits) for block-level protection and AAI control, and STATUS Register 1 (TSP/BSP bits) for independent top/bottom sector lock-down. Write protection is enforced via both hardware (WP# pin enabling BPL lock-down) and software (BP bits and TSP/BSP configuration).

Key Specifications

Pinout & Package

Package: 8-Lead SOIC (150 mil), 8-Contact USON (3 mm × 2 mm), and 8-Contact WSON (6 mm × 5 mm); this part uses the 8-Lead SOIC variant per Q3AE-T suffix.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SPI serial Flash applications.

Compared with AT25DF021A-SSH-T and W25Q20EWUXIE, the SST25VF020B-80-4I-Q3AE-T uniquely combines industrial temperature rating, hardware HOLD# support, and AAI programming in a standard SPI-4 package - making it optimal for cost-sensitive, interrupt-aware embedded systems requiring robust field update capability without layout change.

Availability

SST25VF020B-80-4I-Q3AE-T is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and IoT edge node designs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for SST25VF020B-80-4I-Q3AE-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and Flash memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The SST25VF020B-80-4I-Q3AE-T belongs to Microchip's 25-series Serial Flash family, engineered specifically for cost-effective, low-pin-count code and data storage in resource-constrained embedded systems where reliability, low power, and industrial-grade operation are mandatory.

FAQ

What is the maximum clock frequency supported by the SST25VF020B-80-4I-Q3AE-T during high-speed read operations?

The SST25VF020B-80-4I-Q3AE-T supports up to 80 MHz during High-Speed Read operations using the 0BH opcode and a dummy byte. This is confirmed in Section 5.2 of the official Microchip datasheet DS20005054D. The 80 MHz rating applies specifically to the -80 speed grade variant, and the SST25VF020B-80-4I-Q3AE-T meets this specification under 2.7V–3.6V supply and industrial temperature conditions.

Does the SST25VF020B-80-4I-Q3AE-T support both SPI Mode 0 and Mode 3?

Yes, the SST25VF020B-80-4I-Q3AE-T explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as stated in the Features section and Section 4.0 of DS20005054D. This dual-mode compatibility allows seamless integration with diverse microcontroller SPI peripherals without requiring hardware modifications or clock polarity inversion.

How does the HOLD# pin function on the SST25VF020B-80-4I-Q3AE-T, and what is its timing requirement?

The HOLD# pin on the SST25VF020B-80-4I-Q3AE-T suspends an ongoing SPI transaction without deselecting the device, allowing the host to service interrupts. Per Section 4.1, HOLD# activation requires CE# to be low and the falling edge of HOLD# to coincide with the SCK active-low state; if misaligned, suspension occurs at the next SCK low phase. This behavior is fully documented in Figure 4-2 of DS20005054D.

What erase granularities are available on the SST25VF020B-80-4I-Q3AE-T, and how are they selected?

The SST25VF020B-80-4I-Q3AE-T supports three erase granularities: 4-Kbyte sectors (20H opcode), 32-Kbyte blocks (52H opcode), and 64-Kbyte blocks (D8H opcode). Selection is determined solely by the instruction opcode used - no address-bit masking or configuration register setting is required. Each command targets contiguous memory regions aligned to their respective boundaries, as defined in Table 4-4 and Section 5.7–5.8 of DS20005054D.

Is the SST25VF020B-80-4I-Q3AE-T RoHS compliant, and what package variant does the Q3AE-T suffix indicate?

Yes, the SST25VF020B-80-4I-Q3AE-T is RoHS compliant, as confirmed in the Features section of DS20005054D. The Q3AE-T suffix denotes the 8-Lead SOIC (150 mil) package with industrial temperature range (–40°C to +85°C), tape-and-reel packaging, and lead-free finish - consistent with Microchip's standard ordering nomenclature for this family.