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Microchip Technology SST25VF032B-66-4I-S2AF
- Part No.:
- SST25VF032B-66-4I-S2AF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SST25VF032B-66-4I-S2AF.pdf
- Description:
- IC FLASH 32MBIT SPI 66MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,668
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Product details
Overview
SST25VF032B-66-4I-S2AF from Microchip Technology is a 32 Mbit (4 MB) SPI serial flash memory IC with single-supply operation (2.7–3.6 V), 80 MHz high-speed read capability, and uniform 4 KByte sector/32 KByte/64 KByte block erase architecture. It implements Auto Address Increment (AAI) word programming and supports SPI Modes 0 and 3 for embedded firmware storage in industrial microcontroller systems.
For engineers reviewing the SST25VF032B-66-4I-S2AF datasheet, SST25VF032B-66-4I-S2AF pinout, SST25VF032B-66-4I-S2AF application, or SST25VF032B-66-4I-S2AF equivalent, key selection considerations include its 8-lead SOIC (200 mil) package, hardware-ready/busy signaling via SO pin in AAI mode, 100,000 program/erase endurance, and software-controlled block protection using BP3–BP0 bits.
Technical Context
The SST25VF032B-66-4I-S2AF uses SST's proprietary SuperFlash technology with split-gate cell design and thick-oxide tunneling injector, enabling faster erase times (18 ms sector-erase typical) and lower total energy consumption versus conventional flash. Its SPI interface operates at up to 80 MHz in High-Speed Read mode (0BH command) with dummy cycle support.
It features dual end-of-write detection: software polling of BUSY bit (bit 0) in status register or hardware RY/BY# output on SO pin when enabled via EBSY (70H) command. The device supports three erase granularities-4 KByte sectors, 32 KByte blocks, and 64 KByte blocks-with chip-erase (60H/C7H) requiring all BP bits = 0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4,194,304 bytes), organized as uniform 4 KByte sectors (1024 sectors) |
| Supply Voltage | 2.7–3.6 V - enables direct interfacing with 3.3 V logic without level-shifting |
| Max Clock Frequency | 80 MHz - supports high-throughput firmware reads in boot and update sequences |
| Endurance | 100,000 program/erase cycles - suitable for field-upgradable embedded applications with infrequent writes |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage of calibration data or configuration |
| Erase Times | Sector-erase: 18 ms typ; Chip-erase: 35 ms typ - reduces firmware update latency vs. legacy SPI flash |
| Active Read Current | 10 mA typical at 80 MHz - balances speed and power in battery-backed or low-power host systems |
Pinout & Package
Package: 8-lead SOIC (200 mil), RoHS-compliant, industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence; deassertion returns device to standby |
| SO | Serial Data Output / RY/BY# (in AAI mode) | Outputs data on falling SCK edge; configurable as hardware ready/busy indicator during AAI programming |
| WP# | Write Protect | Enables lock-down of Block-Protection Lock (BPL) bit; disables WRSR execution when BPL=1 and WP#=L |
| HOLD# | Hold | Suspends ongoing SPI transaction without deselecting device; maintains internal state and clock alignment |
| SCK | Serial Clock | Timing reference; inputs latched on rising edge, outputs shifted on falling edge; supports Mode 0 (SCK idle low) and Mode 3 (SCK idle high) |
| SI | Serial Data Input | Accepts commands, addresses, and data MSB-first; sampled on rising SCK edge |
| 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 |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces multi-byte programming time by eliminating repeated address transmission; supports sequential word writes with single ADH command per 2-byte pair |
| Flexible Block Protection | Software-configurable BP3–BP0 bits protect memory regions from accidental write/erase - from upper 1/64 (64 KB) to full array (4 MB) |
| Hardware RY/BY# via SO Pin | Eliminates software polling overhead during AAI programming by driving ready/busy status directly on SO pin after EBSY (70H) command |
| Uniform Erase Architecture | Three independent erase granularities (4 KB sector / 32 KB block / 64 KB block) enable optimized wear leveling and partial firmware updates |
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector delivers 10× faster erase and higher endurance than standard NOR flash |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile code storage with fast read access for cold-boot and watchdog-triggered recovery sequences. Use Value: 80 MHz High-Speed Read (0BH) enables sub-100 ms boot time; 100-year data retention ensures calibration persistence across equipment lifecycle. |
Use Scenario: Holding certified bootloader and safety-critical application code in Class II medical instruments requiring traceable firmware integrity. IC Role / Device Role / Timing Role: Secure, write-protected storage for immutable boot assets, leveraging BP bits and WP# pin to prevent runtime corruption. Use Value: Block-protection granularity down to 64 KB allows isolation of bootloader region while permitting field updates to application partition. |
| Automotive Telematics Module | Smart Energy Meter Configuration |
|
Use Scenario: Storing OTA update packages and vehicle-specific parameter sets in cellular-connected telematics control units (TCUs). IC Role / Device Role / Timing Role: High-reliability storage for over-the-air firmware patches, supporting incremental updates via sector/block erase. Use Value: 18 ms sector-erase time minimizes downtime during staged updates; AAI programming accelerates patch application to large memory regions. |
Use Scenario: Retaining tariff tables, metering history, and cryptographic keys in utility-grade smart meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Long-life, low-power non-volatile memory for infrequently written but mission-critical operational data. Use Value: 5 µA standby current extends battery life in backup-powered meters; industrial temp rating (–40°C to +85°C) ensures operation in extreme ambient conditions. |
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 W25Q32JVSSIQ | 32 Mbit, 1.8 V or 3.3 V supply, Quad SPI support (x4 I/O), 133 MHz max clock, 100K endurance | Supports faster Quad I/O reads and lower-voltage operation; lacks HOLD#/WP# dual-pin hardware flow control | Select for higher bandwidth or dual-voltage designs; verify compatibility with existing SPI controller timing margins and command set. |
| Macronix MX25L3206EM2I-12G | 32 Mbit, 2.7–3.6 V, 80 MHz max clock, 100K endurance, same SOIC-8 package, JEDEC-standard command set | Pin-compatible and functionally identical except for minor status register bit definitions and default BP settings | Drop-in replacement with minimal firmware changes; confirm BP bit defaults match legacy initialization routines. |
Compared with SST25VF032B-66-4I-S2AF, W25Q32JVSSIQ offers higher throughput via Quad SPI but requires controller reconfiguration, while MX25L3206EM2I-12G provides seamless migration with identical pinout, timing, and erase behavior - ideal for continuity-driven redesigns.
Availability
SST25VF032B-66-4I-S2AF is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive telematics, and smart metering applications requiring stable component supply and long-term obsolescence management.
Supply support for SST25VF032B-66-4I-S2AF 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 SST25VF032B-66-4I-S2AF belongs to Microchip's SST25 serial flash product line, designed specifically for cost-sensitive, space-constrained embedded systems needing robust, low-pin-count non-volatile storage with industrial-grade endurance and retention.
FAQ
What is the package type and lead count of the SST25VF032B-66-4I-S2AF?
The SST25VF032B-66-4I-S2AF uses an 8-lead SOIC package with 200-mil body width. This surface-mount package is RoHS-compliant and rated for industrial temperature operation (–40°C to +85°C). It is not offered in WSON or other variants under this specific suffix; the "S2AF" denotes the SOIC-8 industrial-grade variant.
Does the SST25VF032B-66-4I-S2AF support both SPI Mode 0 and Mode 3?
Yes, the SST25VF032B-66-4I-S2AF fully supports SPI Modes 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). In both modes, SI data is sampled on the rising edge of SCK, and SO data is driven on the falling edge. The device automatically adapts to the master's idle clock polarity and phase configuration.
How does the HOLD# pin function during active SPI communication?
The HOLD# pin on the SST25VF032B-66-4I-S2AF suspends ongoing SPI transactions without resetting internal state or requiring CE# toggling. When HOLD# is asserted low while CE# is active, SO enters high-impedance and communication pauses; resuming requires only deasserting HOLD#. This enables priority arbitration in multi-peripheral systems.
What is the purpose of the EBSY (70H) and DBSY (80H) commands in the SST25VF032B-66-4I-S2AF?
EBSY (70H) configures the SO pin to output hardware-ready/busy status during AAI programming, eliminating software polling. DBSY (80H) disables this function and restores SO to normal data output. Both commands must be issued before or after AAI sequences - they do not affect standard read/write operations.
Can the SST25VF032B-66-4I-S2AF be used as a direct replacement for older SST25VF032B variants?
The SST25VF032B-66-4I-S2AF is functionally identical to earlier SST25VF032B revisions in command set, timing, and electrical behavior. However, it is an End-of-Life (EOL) device per Microchip's DS20005071B datasheet (April 2015). For new designs, consult Microchip for recommended replacements; for legacy support, SST25VF032B-66-4I-S2AF remains available through authorized channels.
SST25VF032B-66-4I-S2AF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 66 MHz
- Write Cycle Time - Word, Page:
- 10µs
- 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
SST25VF032B-66-4I-S2AF FAQ
1.How can I place an order for SST25VF032B-66-4I-S2AF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF032B-66-4I-S2AF 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 SST25VF032B-66-4I-S2AF reliable?
The price and inventory of SST25VF032B-66-4I-S2AF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25VF032B-66-4I-S2AF is usually 5 days.
3.What payment methods are accepted for SST25VF032B-66-4I-S2AF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF032B-66-4I-S2AF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF032B-66-4I-S2AF?
SST25VF032B-66-4I-S2AF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF032B-66-4I-S2AF 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 SST25VF032B-66-4I-S2AF?
For technical support, including SST25VF032B-66-4I-S2AF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF032B-66-4I-S2AF requirements.
6.How does Aetrix verify that SST25VF032B-66-4I-S2AF is sourced from the original manufacturer or authorized distributors?
All SST25VF032B-66-4I-S2AF 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 SST25VF032B-66-4I-S2AF meets industry standards.
7.What is the process for return or replacement of SST25VF032B-66-4I-S2AF?
All SST25VF032B-66-4I-S2AF units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF032B-66-4I-S2AF, 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 SST25VF032B-66-4I-S2AF part is unused and in its original packaging.
Return procedure for SST25VF032B-66-4I-S2AF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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