My Inquiry
My Account
Microchip Technology SST25VF512A-33-4I-QAE
- Part No.:
- SST25VF512A-33-4I-QAE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25VF512A-33-4I-QAE.pdf
- Description:
- IC FLASH 512KBIT SPI 33MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,021
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST25VF512A-33-4I-QAE from Microchip Technology is a 512 Kbit SPI serial flash memory IC with SuperFlash technology, supporting 33 MHz high-speed read, 2.7–3.6 V single-supply operation, and industrial temperature range (–40°C to +85°C). It delivers fast byte-program (14 µs typ), sector/block erase (18 ms typ), and chip-erase (70 ms typ) for firmware storage in microcontroller-based embedded systems.
For engineers reviewing the SST25VF512A-33-4I-QAE datasheet, SST25VF512A-33-4I-QAE pinout, SST25VF512A-33-4I-QAE application, or SST25VF512A-33-4I-QAE equivalent, this page provides verified pin functions, real-world use cases, validated alternatives, and supply-chain support for production design-in.
Technical Context
The SST25VF512A-33-4I-QAE implements a four-wire SPI interface compliant with Mode 0 and Mode 3 protocols, using CE#, SCK, SI, and SO signals for command/address/data transfer. Its split-gate SuperFlash cell architecture enables 100,000 program/erase cycles and >100 years data retention.
It integrates hardware HOLD# and WP# pins for runtime suspend and block-level write protection, plus software-controlled status register (BP0/BP1/BPL bits) enabling configurable memory lockdown. Auto Address Increment (AAI) mode reduces sequential programming time without address retransmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64 KByte), organized as 128 × 4 KByte uniform sectors |
| Max Clock Frequency | 33 MHz for High-Speed Read - enables 4.125 MB/s sustained throughput |
| Supply Voltage | 2.7–3.6 V - compatible with 3.3 V logic rails and low-power system designs |
| Endurance | 100,000 program/erase cycles - supports frequent firmware updates in field-deployed devices |
| Data Retention | >100 years at +25°C - ensures long-term reliability in unpowered storage applications |
| Operating Temp | –40°C to +85°C (Industrial grade) - qualified for automotive body control and industrial PLC environments |
| Active Read Current | 7 mA typical - minimizes power draw during boot-time code fetch |
| Standby Current | 8 µA typical - enables ultra-low-power sleep modes in battery-backed systems |
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; must remain low throughout command sequence to prevent premature termination |
| SCK | Serial Clock | Timing reference for SPI transfers; rising edge latches input (SI), falling edge outputs data (SO) |
| SI | Serial Data Input | Receives opcodes, addresses, and program data; MSB-first, synchronized to SCK rising edge |
| SO | Serial Data Output | Transmits read data and status register contents; driven on SCK falling edge |
| WP# | Write Protect | Hardware-enables lock-down of Block-Protection bits (BP0/BP1/BPL) when pulled low |
| HOLD# | Hold | Suspends ongoing SPI transaction without deselecting device; maintains internal state and clock alignment |
| VDD | Power Supply | 2.7–3.6 V main supply; decoupling capacitor required near pin for noise immunity |
| VSS | Ground | Reference return path; must be connected to system ground plane with low-impedance trace |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector enables lower program current and faster erase vs. conventional flash |
| Uniform Erase Architecture | 4 KByte sectors and 32 KByte overlay blocks allow granular firmware partitioning and partial update capability |
| Auto Address Increment (AAI) | Eliminates repeated address transmission during multi-byte programming, reducing total SPI bus occupancy |
| Hardware Write Protection | WP# pin directly controls BPL bit lock-down, providing tamper-resistant configuration of BP0/BP1 protection levels |
| HOLD# Functionality | Enables concurrent SPI bus sharing - e.g., MCU can pause flash access to service higher-priority peripherals |
| Software Status Register | Real-time BUSY/WEL/BP/BPL monitoring via RDSR instruction supports robust polling-based firmware flow control |
Applications
| Boot Code Storage | Firmware Over-the-Air (OTA) Update |
|---|---|
Use Scenario: Storing bootloader and initial application code executed by an MCU at power-on reset. IC Role / Device Role / Timing Role: Non-volatile storage for executable code; accessed via SPI during cold start with deterministic timing. Use Value: 33 MHz High-Speed Read enables sub-100 ms boot latency; 100K endurance supports field-revisionable boot images. |
Use Scenario: Receiving and validating new firmware images over wireless or wired interfaces before committing to flash. IC Role / Device Role / Timing Role: Dual-bank capable storage (via sector/block erase) allows safe A/B firmware swapping. Use Value: Uniform 4 KByte sectors enable atomic update of individual modules; HOLD# permits interruption during large writes. |
| Configuration Parameter Storage | Industrial Sensor Calibration Data |
Use Scenario: Persisting user-configurable settings (e.g., display brightness, network SSID, calibration offsets) across power cycles. IC Role / Device Role / Timing Role: Low-frequency, byte-level write storage; accessed only during setup or save operations. Use Value: Byte-program time of 14 µs and 8 µA standby current minimize energy per write and idle drain in battery-powered devices. |
Use Scenario: Storing factory-calibrated coefficients and sensor-specific compensation tables in industrial transmitters. IC Role / Device Role / Timing Role: One-time or infrequent write, long-term read-only storage; requires guaranteed 100-year data integrity. Use Value: >100 years data retention and industrial temp rating ensure accuracy stability across product lifetime in harsh environments. |
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 |
|---|---|---|---|
| AT25DF041A-SSH-T | 4 Mbit density (8× larger), 85 MHz max clock, same SOIC-8 package and SPI Mode 0/3 compatibility | Better suited for systems requiring larger firmware images or future scalability; higher speed supports faster OTA downloads | Select when board layout accommodates same footprint but design needs headroom for firmware growth or performance uplift |
| W25Q80DVSSIG | 8 Mbit density, 104 MHz dual/quad SPI, different pinout (SOIC-8 but non-identical function mapping for WP#/HOLD#) | Requires PCB redesign due to differing WP#/HOLD# behavior and quad-SPI dependency; not drop-in | Choose only if migrating to dual/quad SPI architecture and revising layout; not suitable for direct replacement |
Compared with AT25DF041A-SSH-T and W25Q80DVSSIG, the SST25VF512A-33-4I-QAE offers optimal balance of proven industrial reliability, minimal power consumption, and straightforward SPI-4 wire integration - making it ideal for cost-sensitive, space-constrained, and long-lifecycle embedded applications where 512 Kbit capacity suffices.
Availability
SST25VF512A-33-4I-QAE is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, medical diagnostic peripherals, and IoT edge nodes requiring stable component supply across extended product lifecycles.
Supply support for SST25VF512A-33-4I-QAE 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 semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with strong focus on embedded control and reliability-critical applications.
The SST25VF512A-33-4I-QAE belongs to Microchip's legacy SST serial flash product line, designed specifically for cost-effective, low-pin-count, high-reliability code and data storage in resource-constrained embedded systems.
FAQ
What is the maximum operating frequency supported by SST25VF512A-33-4I-QAE for read operations?
The SST25VF512A-33-4I-QAE supports up to 33 MHz for High-Speed Read operations using the 0BH opcode and dummy byte. This enables sustained data throughput of 4.125 MB/s. Standard Read (03H) operates up to 20 MHz. The "33" in the part number explicitly denotes this 33 MHz capability, confirmed in DS25090A Section 9.
Does SST25VF512A-33-4I-QAE support both SPI Mode 0 and Mode 3?
Yes, SST25VF512A-33-4I-QAE is fully compatible with both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as stated in the Features section and detailed in Figure 3 of DS25090A. This dual-mode support ensures interoperability with diverse host controllers without hardware modification.
What is the purpose of the HOLD# pin on SST25VF512A-33-4I-QAE?
The HOLD# pin on SST25VF512A-33-4I-QAE suspends an active SPI transaction without deselecting the device or resetting internal state. When asserted low during CE# active, it places SO in high-impedance while preserving address and command context - enabling time-critical MCU tasks to preempt flash access without data loss or reinitialization overhead.
How does write protection work on SST25VF512A-33-4I-QAE?
SST25VF512A-33-4I-QAE implements dual-layer write protection: hardware via the WP# pin (enabling BPL bit lock-down), and software via BP0/BP1 bits in the status register. When WP# is low and BPL=1, BP0/BP1 become read-only, preventing accidental overwrite of protected sectors - a critical safeguard for boot code and calibration data.
What is the endurance and data retention specification for SST25VF512A-33-4I-QAE?
The SST25VF512A-33-4I-QAE guarantees 100,000 program/erase cycles and greater than 100 years of data retention at +25°C, as specified in the Features section of DS25090A. These values are measured and characterized per JEDEC standards, ensuring suitability for long-life industrial and automotive applications.
SST25VF512A-33-4I-QAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not 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-WSON
SST25VF512A-33-4I-QAE FAQ
1.How can I place an order for SST25VF512A-33-4I-QAE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF512A-33-4I-QAE 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-QAE reliable?
The price and inventory of SST25VF512A-33-4I-QAE 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-QAE is usually 5 days.
3.What payment methods are accepted for SST25VF512A-33-4I-QAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF512A-33-4I-QAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF512A-33-4I-QAE?
SST25VF512A-33-4I-QAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF512A-33-4I-QAE 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-QAE?
For technical support, including SST25VF512A-33-4I-QAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF512A-33-4I-QAE requirements.
6.How does Aetrix verify that SST25VF512A-33-4I-QAE is sourced from the original manufacturer or authorized distributors?
All SST25VF512A-33-4I-QAE 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-QAE meets industry standards.
7.What is the process for return or replacement of SST25VF512A-33-4I-QAE?
All SST25VF512A-33-4I-QAE units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF512A-33-4I-QAE, 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-QAE part is unused and in its original packaging.
Return procedure for SST25VF512A-33-4I-QAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25VF512A-33-4I-QAE Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
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.
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.
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…
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…
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…
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 …
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…
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…
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…
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…
