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Microchip Technology SST25VF512A-33-4C-SAE
- Part No.:
- SST25VF512A-33-4C-SAE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25VF512A-33-4C-SAE.pdf
- Description:
- IC FLASH 512KBIT SPI 33MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,093
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Product details
Overview
SST25VF512A-33-4C-SAE from Microchip Technology is a 512 Kbit SPI serial flash memory IC designed for embedded firmware storage and configuration data retention in resource-constrained systems. It operates at 2.7–3.6 V, supports up to 33 MHz clock frequency, delivers 100,000 program/erase cycles, and guarantees >100 years data retention - enabling reliable boot code storage in industrial controllers and IoT edge nodes.
For engineers reviewing the SST25VF512A-33-4C-SAE datasheet, SST25VF512A-33-4C-SAE pinout, SST25VF512A-33-4C-SAE application, or SST25VF512A-33-4C-SAE equivalent, key selection criteria include SPI Mode 0/3 compatibility, 4 KByte sector erase granularity, Auto Address Increment (AAI) programming efficiency, HOLD#/WP# hardware control support, and commercial temperature range (0°C to +70°C) compliance.
Technical Context
The SST25VF512A-33-4C-SAE implements a four-wire SPI interface with CE#, SCK, SI, and SO lines, supporting both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) timing configurations. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve faster erase times (18 ms sector-erase, 70 ms chip-erase) and lower active current (7 mA typical) versus conventional NOR flash.
It integrates a software status register with BUSY, WEL, BP0/BP1, AAI, and BPL bits for real-time operation monitoring and flexible block protection. Hardware pins HOLD# and WP# enable suspend-on-demand and lock-down write protection independent of software state - critical for fail-safe firmware updates in automotive and industrial gateways.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64 KByte), organized as sixteen 4 KByte uniform sectors |
| Max Clock Frequency | 33 MHz - enables high-speed read via 0BH command with dummy byte, reducing firmware load latency |
| Supply Voltage | 2.7–3.6 V - compatible with single-supply 3.3 V logic domains without level shifting |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years in deployed devices |
| Data Retention | >100 years at +25°C - ensures configuration integrity across product lifecycle without refresh |
| Active Read Current | 7 mA typical - minimizes power budget impact during boot sequence execution |
| Standby Current | 8 µA typical - supports ultra-low-power sleep modes in battery-backed applications |
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 instruction execution; high-to-low transition initiates command latch |
| SCK | Serial Clock | Timing reference for SPI transfers; rising edge latches SI, falling edge outputs SO; supports Mode 0/3 polarity |
| SI | Serial Data Input | Command, address, and data input path; MSB-first; sampled on SCK rising edge |
| SO | Serial Data Output | Data output path during read/status operations; driven on SCK falling edge; high-impedance during HOLD# active |
| WP# | Write Protect | Hardware-enables status register lock-down (BPL bit); low = BPL functional; high = BPL, BP0/BP1 writable |
| HOLD# | Hold | Suspends ongoing SPI transaction without deselecting device; maintains internal state and clock alignment |
| VDD | Power Supply | 2.7–3.6 V supply input; powers core logic and memory array |
| VSS | Ground | Reference ground for all I/O and internal circuitry; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell architecture reduces program/erase energy by shortening pulse duration and lowering current draw |
| Auto Address Increment (AAI) | Eliminates repeated address transmission during sequential byte programming - cuts total flash write time by ~40% vs standard Byte-Program |
| Flexible Block Protection | BP0/BP1 bits configure 0%, 25%, 50%, or 100% memory area write protection; BPL bit locks status register when WP# is low |
| HOLD# Pin Functionality | Enables multi-master arbitration and debug pause without resetting internal address pointer or command state |
| High-Speed Read (33 MHz) | 0BH command with dummy byte achieves 33 MHz throughput - accelerates boot image loading in real-time systems |
Applications
| Firmware Boot Storage | Configuration Parameter Storage |
|---|---|
|
Use Scenario: Storing bootloader and application firmware images for microcontrollers in industrial PLCs. IC Role / Device Role / Timing Role: Non-volatile code storage accessed during cold start; supports fast read at 33 MHz to minimize boot delay. Use Value: 100-year data retention ensures firmware persistence across equipment lifetime without backup power or refresh. |
Use Scenario: Holding calibration coefficients, network settings, and user preferences in smart meters. IC Role / Device Role / Timing Role: Configuration data repository updated infrequently but requiring guaranteed write endurance and sector-level erase isolation. Use Value: 4 KByte uniform sectors allow selective reprogramming of parameter blocks without disturbing firmware or other settings. |
| Firmware Field Updates | Secure Boot Key Storage |
|
Use Scenario: Enabling over-the-air (OTA) firmware upgrades in connected HVAC controllers. IC Role / Device Role / Timing Role: Dual-role memory: holds active firmware while staging new version in protected sectors. Use Value: HOLD# pin allows safe interruption of update sequences during power loss or reset events. |
Use Scenario: Storing cryptographic keys and secure boot manifests in medical diagnostic devices. IC Role / Device Role / Timing Role: Tamper-resistant storage with hardware write protection (WP# + BPL) preventing unauthorized modification. Use Value: Software-controlled BP0/BP1 bits enable permanent lockdown of key regions after initial provisioning. |
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 W25Q80DVSSIG | 8 Mbit density, 104 MHz dual/quad SPI, 3.3 V only, no HOLD# pin | Higher capacity and speed, but lacks hardware hold functionality required for interrupt-safe updates | Select when higher throughput and larger code footprint justify absence of HOLD# and increased voltage constraint |
| Macronix MX25L512AL | 512 Kbit, 33 MHz, same SOIC-8 package, but only supports SPI Mode 0 (not Mode 3) | Compatible pinout and voltage, but incompatible with legacy host controllers configured for Mode 3 timing | Choose only if host system uses SPI Mode 0 exclusively; verify timing margins before substitution |
Compared with SST25VF512A-33-4C-SAE, W25Q80DVSSIG offers greater density and speed but removes HOLD# - eliminating safe suspend capability - while MX25L512AL matches capacity and package but restricts SPI mode flexibility, risking interoperability with Mode 3 hosts.
Availability
SST25VF512A-33-4C-SAE is available at Aetrix Electronics and suitable for industrial control systems, IoT sensor nodes, and medical diagnostics equipment requiring stable component supply, long-term firmware integrity, and field-upgrade resilience.
Supply support for SST25VF512A-33-4C-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 semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on reliability, longevity, and embedded system integration.
The SST25VF512A-33-4C-SAE belongs to Microchip's legacy SST serial flash product line, engineered for cost-sensitive, low-power embedded applications where deterministic timing, robust data retention, and simple SPI interface are prioritized over high bandwidth.
FAQ
What is the operating temperature range for SST25VF512A-33-4C-SAE?
The SST25VF512A-33-4C-SAE is rated for commercial temperature operation from 0°C to +70°C. This range is validated per the DS25090A datasheet and applies specifically to the -4C suffix variant. It does not support industrial (-40°C to +85°C) or extended (-20°C to +85°C) ranges unless explicitly marked with -4I or -4E suffixes. Always verify ambient thermal design against this specification when deploying SST25VF512A-33-4C-SAE in enclosed enclosures or high-power-density boards.
Does SST25VF512A-33-4C-SAE support both SPI Mode 0 and Mode 3?
Yes, SST25VF512A-33-4C-SAE natively supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as confirmed in Section 5 of the DS25090A datasheet. The device samples SI on the rising edge and drives SO on the falling edge in both modes. This dual-mode capability ensures compatibility with diverse host controllers - including legacy ASICs and newer MCUs - without requiring hardware redesign or firmware abstraction layers when integrating SST25VF512A-33-4C-SAE.
What is the purpose of the HOLD# pin on SST25VF512A-33-4C-SAE?
The HOLD# pin on SST25VF512A-33-4C-SAE suspends an ongoing SPI transaction without deselecting the device or resetting internal state. When asserted low during active CE#, it places SO in high-impedance while preserving address pointer and command context - enabling safe multi-master arbitration or debug pause. This behavior is electrically defined in Figure 4 and timing-critical for fault-tolerant firmware updates where power loss or reset must not corrupt SST25VF512A-33-4C-SAE memory contents.
How does the Auto Address Increment (AAI) feature improve programming efficiency in SST25VF512A-33-4C-SAE?
AAI in SST25VF512A-33-4C-SAE eliminates the need to retransmit the full 16-bit address for each subsequent byte during sequential programming. After issuing AFH + address + first data byte, successive bytes require only AFH + data - reducing instruction overhead by ~50% per byte. As documented in Figure 8 and Table 6, this cuts total programming time significantly, especially during full-array writes. For example, programming 1 KByte drops from ~140 ms (standard Byte-Program) to ~85 ms using AAI in SST25VF512A-33-4C-SAE.
Can SST25VF512A-33-4C-SAE be used as a direct replacement for SST25VF512A-33-4I?
No, SST25VF512A-33-4C-SAE is not a direct replacement for SST25VF512A-33-4I due to differing temperature specifications: the -4C suffix denotes commercial (0°C to +70°C), while -4I specifies industrial (-40°C to +85°C). Electrical parameters such as standby current and timing margins are characterized only within their respective temperature ranges. Substituting SST25VF512A-33-4C-SAE in an industrial design may result in parametric failure under cold-start or high-temperature operation - always match suffix codes to environmental requirements before qualifying SST25VF512A-33-4C-SAE.
SST25VF512A-33-4C-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25VF512A-33-4C-SAE FAQ
1.How can I place an order for SST25VF512A-33-4C-SAE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF512A-33-4C-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-33-4C-SAE reliable?
The price and inventory of SST25VF512A-33-4C-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-33-4C-SAE is usually 5 days.
3.What payment methods are accepted for SST25VF512A-33-4C-SAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF512A-33-4C-SAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF512A-33-4C-SAE?
SST25VF512A-33-4C-SAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF512A-33-4C-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-33-4C-SAE?
For technical support, including SST25VF512A-33-4C-SAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF512A-33-4C-SAE requirements.
6.How does Aetrix verify that SST25VF512A-33-4C-SAE is sourced from the original manufacturer or authorized distributors?
All SST25VF512A-33-4C-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-33-4C-SAE meets industry standards.
7.What is the process for return or replacement of SST25VF512A-33-4C-SAE?
All SST25VF512A-33-4C-SAE units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF512A-33-4C-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-33-4C-SAE part is unused and in its original packaging.
Return procedure for SST25VF512A-33-4C-SAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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