Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology SST25VF512A-33-4I-SAE

Name: SST25VF512A-33-4I-SAE
Brand: Microchip Technology
SKU: SST25VF512A-33-4I-SAE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SST25VF512A-33-4I-SAE

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: SST25VF512A-33-4I-SAE.pdf

Description:: IC FLASH 512KBIT SPI 33MHZ 8SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:819

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SST25VF512A-33-4I-SAE from Microchip Technology is a 512 Kbit SPI serial flash memory IC designed for embedded firmware storage and configuration data retention in space-constrained systems. It operates from a single 2.7–3.6 V supply, supports up to 33 MHz clock frequency, delivers 100,000 program/erase cycles, and guarantees >100 years data retention - deployed in industrial control modules requiring reliable nonvolatile code storage.

For engineers reviewing the SST25VF512A-33-4I-SAE datasheet, SST25VF512A-33-4I-SAE pinout, SST25VF512A-33-4I-SAE application, or SST25VF512A-33-4I-SAE equivalent, key selection criteria include SPI Mode 0/3 compatibility, industrial temperature range (−40°C to +85°C), SOIC-8 package footprint, sector/block erase granularity, and hardware/software write protection implementation.

Technical Context

The SST25VF512A-33-4I-SAE implements a four-wire SPI interface (SCK, SI, SO, CE#) with dual-mode support (Mode 0 and Mode 3), enabling interoperability with diverse host controllers. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve faster erase times (18 ms sector-erase typical) and lower active current (7 mA typical) versus conventional NOR flash.

It integrates dedicated control pins - HOLD# for pausing ongoing serial transfers without resetting the interface, and WP# for enabling status register lock-down - alongside a software-managed status register (BUSY, WEL, BP0/BP1, BPL, AAI bits) that governs write enable state, block protection level, and programming mode selection.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	512 Kbit (64 KByte), organized as sixteen 4 KByte uniform sectors and two 32 KByte overlay blocks - enables fine-grained firmware updates without full chip erase.
Max Clock Frequency	33 MHz (High-Speed Read mode), allowing 33 MB/s peak read throughput - critical for fast boot-time code fetch in microcontroller-based systems.
Supply Voltage	2.7–3.6 V single supply - compatible with 3.3 V logic domains and eliminates need for voltage translation in modern embedded designs.
Endurance & Retention	100,000 program/erase cycles typical; >100 years data retention at 25°C - ensures long-term reliability in unattended industrial deployments.
Operating Temperature	−40°C to +85°C (Industrial grade) - validated for use in motor drives, PLCs, and outdoor telemetry equipment.
Active/Standby Current	7 mA typical active read current; 8 µA typical standby current - reduces system power budget in battery-backed or energy-sensitive applications.
Erase/Program Speed	18 ms sector-erase typical; 14 µs byte-program typical; 70 ms chip-erase typical - minimizes firmware update latency during field upgrades.

Pinout & Package

Package: 8-lead SOIC (150 mil body width), RoHS-compliant, lead-free.

Pin/Terminal	Circuit Role	Design Meaning
CE#	Chip Enable	Active-low device select signal; must remain low throughout command execution - defines SPI transaction boundaries and enables multi-device bus sharing.
SCK	Serial Clock	Timing reference for SPI communication; latches input on rising edge, outputs data on falling edge - supports both Mode 0 (idle low) and Mode 3 (idle high) configurations.
SI	Serial Data Input	Unidirectional command/address/data input path - accepts opcodes (e.g., 03H for Read), addresses, and program data MSB-first.
SO	Serial Data Output	Unidirectional data output path - streams read data or status register contents MSB-first; enters high-impedance during HOLD# assertion.
WP#	Write Protect	Hardware-enables status register lock-down (BPL bit); when low, prevents modification of BP0/BP1 unless BPL=0 - provides tamper-resistant configuration locking.
HOLD#	Hold	Pauses ongoing SPI transfer without deselecting device or resetting internal address pointer - allows host CPU to service higher-priority interrupts mid-sequence.
VDD	Power Supply	2.7–3.6 V core supply input - powers all internal logic and memory array; requires local decoupling per layout guidelines.
VSS	Ground	Reference return path for VDD and I/O signals - must be connected to system ground plane with low-inductance routing.

Key Features

Feature	Design Value
Auto Address Increment (AAI) Programming	Reduces total programming time for sequential writes by eliminating repeated address transmission - ideal for bulk firmware image loading.
Flexible Erase Architecture	Supports uniform 4 KByte sector erase and 32 KByte block erase - enables partial updates while preserving critical bootloader or calibration data.
Dual SPI Mode Support	Compatible with both Mode 0 and Mode 3 timing - ensures plug-and-play integration with ARM Cortex-M, PIC, and FPGA SPI masters without timing reconfiguration.
Hardware Write Protection	WP# pin controls lock-down of Block-Protection bits (BP0/BP1) via BPL bit - prevents accidental corruption of protected memory regions during field operation.
End-of-Write Detection	Software-readable BUSY bit in status register - enables polling-based synchronization without fixed delay timers, improving system determinism.

Applications

Industrial PLC Firmware Storage	Medical Device Configuration Memory
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage IC interfaced via SPI to an ARM9 host processor; provides deterministic read access during cold boot and supports in-field firmware patching. Use Value: 100,000-cycle endurance and −40°C to +85°C rating ensure uninterrupted operation over 10+ years; sector erase allows updating HMI screens without disturbing safety-critical control routines.	Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic ultrasound units requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Secure configuration memory IC with hardware WP# and software BP bits - protects calibration constants from unintended overwrite during device servicing. Use Value: >100-year data retention guarantees traceability of calibration history across product lifetime; SOIC-8 package fits tight PCB real estate constraints in handheld enclosures.
Smart Energy Meter Bootloader	Automotive Body Control Module (BCM)
Use Scenario: Hosting secure bootloader code and cryptographic keys in ANSI C12.22-compliant smart meters exposed to utility grid transients and extended outdoor thermal cycling. IC Role / Device Role / Timing Role: Trusted boot source for ARM Cortex-M4 MCU; verified via checksum before executing application firmware - relies on consistent 33 MHz read speed for sub-100 ms boot time. Use Value: High-speed read mode (33 MHz) meets strict boot timing budgets; industrial temp grade ensures reliability at −40°C startup in northern climates.	Use Scenario: Storing lighting profiles, window position memories, and CAN node configuration in automotive BCMs subjected to ISO 16750-2 load dump and reverse battery stress. IC Role / Device Role / Timing Role: SPI-connected nonvolatile memory IC supporting EEPROM-emulation via byte-program and sector-erase - retains settings across ignition cycles. Use Value: Low 8 µA standby current extends battery drain life during vehicle sleep mode; HOLD# pin allows seamless arbitration between BCM MCU and infotainment system SPI bus.

Industrial PLC Firmware Storage

Medical Device Configuration Memory

Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI exposure.

IC Role / Device Role / Timing Role: Nonvolatile code storage IC interfaced via SPI to an ARM9 host processor; provides deterministic read access during cold boot and supports in-field firmware patching.

Use Value: 100,000-cycle endurance and −40°C to +85°C rating ensure uninterrupted operation over 10+ years; sector erase allows updating HMI screens without disturbing safety-critical control routines.

Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic ultrasound units requiring FDA-compliant data integrity.

IC Role / Device Role / Timing Role: Secure configuration memory IC with hardware WP# and software BP bits - protects calibration constants from unintended overwrite during device servicing.

Use Value: >100-year data retention guarantees traceability of calibration history across product lifetime; SOIC-8 package fits tight PCB real estate constraints in handheld enclosures.

Smart Energy Meter Bootloader

Automotive Body Control Module (BCM)

Use Scenario: Hosting secure bootloader code and cryptographic keys in ANSI C12.22-compliant smart meters exposed to utility grid transients and extended outdoor thermal cycling.

IC Role / Device Role / Timing Role: Trusted boot source for ARM Cortex-M4 MCU; verified via checksum before executing application firmware - relies on consistent 33 MHz read speed for sub-100 ms boot time.

Use Value: High-speed read mode (33 MHz) meets strict boot timing budgets; industrial temp grade ensures reliability at −40°C startup in northern climates.

Use Scenario: Storing lighting profiles, window position memories, and CAN node configuration in automotive BCMs subjected to ISO 16750-2 load dump and reverse battery stress.

IC Role / Device Role / Timing Role: SPI-connected nonvolatile memory IC supporting EEPROM-emulation via byte-program and sector-erase - retains settings across ignition cycles.

Use Value: Low 8 µA standby current extends battery drain life during vehicle sleep mode; HOLD# pin allows seamless arbitration between BCM MCU and infotainment system SPI bus.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Winbond W25Q20CLSNIG	2 Mbit density, 104 MHz max clock, quad SPI support - no HOLD#/WP# pins in 8-pin SOIC variant; different status register layout.	Higher bandwidth but lacks hardware HOLD# - unsuitable where interrupt-latency-critical pause capability is required.	Select only if migrating to quad SPI architecture and firmware supports alternate command set; verify pin compatibility and protection scheme alignment.
Macronix MX25L512AL	512 Kbit, 33 MHz, same SOIC-8 package; supports SPI Mode 0 only; 20-year data retention (vs. >100 years).	Lower retention spec may limit suitability for medical/aerospace applications requiring ultra-long-term data integrity.	Valid drop-in alternative for cost-sensitive industrial designs where 20-year retention suffices and Mode 3 compatibility is unused.

Compared with SST25VF512A-33-4I-SAE, W25Q20CLSNIG offers higher density and speed but removes critical hardware flow-control pins, while MX25L512AL matches form-factor and speed but trades off long-term data integrity - making SST25VF512A-33-4I-SAE optimal for applications demanding industrial-grade reliability with robust SPI bus management.

Availability

SST25VF512A-33-4I-SAE is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and smart metering platforms requiring stable component supply and long-lifecycle support.

Supply support for SST25VF512A-33-4I-SAE 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 is a global provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its serial flash portfolio.

The SST25VF512A-33-4I-SAE belongs to SST's SuperFlash serial flash family, engineered specifically for cost-sensitive, space-constrained embedded systems needing high reliability, low power, and SPI simplicity - targeting industrial, medical, and consumer IoT endpoints.

FAQ

What is the maximum clock frequency supported by SST25VF512A-33-4I-SAE?

The SST25VF512A-33-4I-SAE supports a maximum clock frequency of 33 MHz in High-Speed Read mode (command 0BH). This enables faster code execution and reduced boot times compared to standard 20 MHz SPI flash devices. The part maintains full functionality at lower frequencies down to DC, ensuring compatibility with legacy or low-power host controllers.

Does SST25VF512A-33-4I-SAE support both SPI Mode 0 and Mode 3?

Yes, SST25VF512A-33-4I-SAE explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as confirmed in the DS25090A datasheet Section 5. This dual-mode capability ensures seamless integration with a broad range of microcontrollers and FPGAs without requiring hardware or firmware workarounds for clock polarity or phase mismatches.

What is the purpose of the HOLD# pin on SST25VF512A-33-4I-SAE?

The HOLD# pin on SST25VF512A-33-4I-SAE allows the host controller to temporarily suspend an ongoing SPI transaction without deselecting the device or resetting internal state. When asserted low (with CE# active), it places SO in high-impedance and freezes the address counter - enabling the host to service interrupts or switch bus masters while preserving transaction context for resumption.

How does write protection work on SST25VF512A-33-4I-SAE?

SST25VF512A-33-4I-SAE implements layered write protection: hardware via the WP# pin (enabling BPL lock-down), and software via BP0/BP1 bits in the status register. When WP# is low and BPL=1, BP0/BP1 become read-only, protecting up to the full 64 KByte array. This dual mechanism prevents accidental or malicious overwrites of critical firmware or calibration data during field operation.

What package type is used for SST25VF512A-33-4I-SAE?

SST25VF512A-33-4I-SAE is packaged in an 8-lead SOIC with 150 mil body width (standard JEDEC MS-012AC), RoHS-compliant and lead-free. This surface-mount package offers proven manufacturability, thermal performance, and compatibility with automated PCB assembly processes - widely adopted in industrial and medical electronics where reliability and supply chain stability are essential.

SST25VF512A-33-4I-SAE Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: SST25

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH

Memory Size:: 512Kbit

Memory Organization:: 64K x 8

Memory Interface:: SPI

Clock Frequency:: 33 MHz

Write Cycle Time - Word, Page:: 20µs

Access Time:: -

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

SST25VF512A-33-4I-SAE FAQ

1.How can I place an order for SST25VF512A-33-4I-SAE through Aetrix?

Please submit a Request for Quotation (RFQ) for SST25VF512A-33-4I-SAE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SST25VF512A-33-4I-SAE reliable?

The price and inventory of SST25VF512A-33-4I-SAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25VF512A-33-4I-SAE is usually 5 days.

3.What payment methods are accepted for SST25VF512A-33-4I-SAE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF512A-33-4I-SAE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SST25VF512A-33-4I-SAE?

SST25VF512A-33-4I-SAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SST25VF512A-33-4I-SAE order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SST25VF512A-33-4I-SAE?

For technical support, including SST25VF512A-33-4I-SAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF512A-33-4I-SAE requirements.

6.How does Aetrix verify that SST25VF512A-33-4I-SAE is sourced from the original manufacturer or authorized distributors?

All SST25VF512A-33-4I-SAE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SST25VF512A-33-4I-SAE meets industry standards.

7.What is the process for return or replacement of SST25VF512A-33-4I-SAE?

All SST25VF512A-33-4I-SAE units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF512A-33-4I-SAE, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SST25VF512A-33-4I-SAE part is unused and in its original packaging.

Return procedure for SST25VF512A-33-4I-SAE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…