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Microchip Technology SST25PF040B-80-4C-SAE-T
- Part No.:
- SST25PF040B-80-4C-SAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040B-80-4C-SAE-T.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,811
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Product details
Overview
SST25PF040B-80-4C-SAE-T from Microchip Technology is a 4 Mbit SPI serial flash memory IC designed for embedded firmware storage and code execution in resource-constrained systems. It operates from a single 2.3–3.6V supply, supports 80 MHz read speed (at 2.7–3.6V), features uniform 4 KByte sectors and 64 KByte overlay blocks, and delivers 100,000 program/erase cycles with >100 years data retention - deployed in industrial control modules and IoT edge nodes.
For engineers reviewing the SST25PF040B-80-4C-SAE-T datasheet, SST25PF040B-80-4C-SAE-T pinout, SST25PF040B-80-4C-SAE-T application, or SST25PF040B-80-4C-SAE-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, hardware hold/write-protect functionality, AAI programming efficiency, and SOIC-150mil package suitability for legacy PCB layouts requiring drop-in replacement of prior-generation serial flash.
Technical Context
The SST25PF040B-80-4C-SAE-T implements a four-wire SPI interface with dual-mode clock polarity support (Mode 0 and Mode 3), enabling interoperability with diverse host controllers. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling to achieve faster erase times (18 ms sector-erase, 35 ms chip-erase) and lower active current (10 mA typical) versus conventional NOR flash.
Internal architecture includes dedicated I/O buffers, address latches, X/Y decoders, and status register logic supporting real-time BUSY/WEL monitoring and flexible block protection via BP3–BP0 bits. The HOLD# and WP# pins provide hardware-level suspend and write-lock control independent of software state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) organized as uniform 4 KByte sectors, 32 KByte and 64 KByte overlay blocks - enables granular firmware updates without full chip erase. |
| Supply Voltage | 2.3–3.6V single supply - compatible with 2.5V and 3.3V system rails; no external voltage translators required. |
| Max Read Speed | 80 MHz (2.7–3.6V), 50 MHz (2.3–2.7V) - supports high-throughput boot code fetch in microcontroller-based systems. |
| Endurance | 100,000 program/erase cycles (typical) - sufficient for field firmware upgrades over 10+ years in industrial deployments. |
| Data Retention | >100 years at +25°C - ensures long-term reliability in unpowered storage applications. |
| Active Current | 10 mA typical at 80 MHz - minimizes power budget impact during active read operations. |
| Standby Current | 5 μA typical - enables ultra-low-power sleep modes in battery-operated devices. |
Pinout & Package
Package: 8-lead SOIC (150 mils), RoHS compliant, surface-mountable with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence - enables multi-device SPI bus sharing. |
| SO | Serial Data Output | Drives output data on falling SCK edge; configurable as RY/BY# during AAI programming - supports hardware end-of-write detection. |
| WP# | Write Protect | Hardware lock-down control for status register BP bits - prevents accidental firmware corruption during power transients. |
| VSS | Ground | Reference return path for all digital and analog circuitry - requires low-impedance PCB connection to minimize noise coupling. |
| VDD | Power Supply | 2.3–3.6V input; bypass capacitor (0.1 μF) recommended near pin - ensures stable internal voltage regulation during fast transitions. |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device - preserves internal address pointer for resumed communication. |
| SCK | Serial Clock | Timing reference for SI/SO data transfer; rising edge samples input, falling edge outputs data - supports both SPI Mode 0 and Mode 3. |
| SI | Serial Data Input | Receives commands, addresses, and data MSB-first on rising SCK edge - compatible with standard SPI master implementations. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time by eliminating repeated address transmission - ideal for sequential firmware image writes. |
| Hardware End-of-Write Detection | SO pin outputs RY/BY# status during AAI mode - eliminates software polling overhead and improves deterministic timing. |
| Flexible Block Protection | BP3–BP0 bits enable software-selectable protection of upper 1/8, 1/4, 1/2, or full memory array - supports secure bootloader partitioning. |
| Uniform Erase Architecture | Consistent 4 KByte sector, 32 KByte and 64 KByte block erase granularity - simplifies memory management in RTOS and bare-metal firmware. |
| Low-Voltage Operation | Full functionality down to 2.3V - maintains reliability in brown-out conditions common in automotive and industrial power supplies. |
Applications
| Firmware Storage in Industrial PLCs | Secure Bootloader Partitioning |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Non-volatile code storage and execution source for ARM Cortex-M microcontrollers; provides deterministic 80 MHz read access during cold boot sequences. Use Value: 100-year data retention and 100,000-cycle endurance ensure firmware integrity across decades of unattended operation without field maintenance. | Use Scenario: Isolating immutable bootloader code from upgradable application firmware in medical diagnostic equipment requiring regulatory compliance and anti-tampering safeguards. IC Role / Device Role / Timing Role: Dual-role memory partition: protected upper 1/8 sector for bootloader, unprotected remainder for application updates via SPI interface. Use Value: Hardware WP# pin and software-configurable BP bits prevent unauthorized modification while enabling field-upgradable application binaries. |
| IoT Edge Node Configuration Storage | Legacy Embedded System Upgrade Path |
Use Scenario: Holding device-specific calibration data, network credentials, and OTA update staging buffers in battery-powered wireless sensors deployed in remote locations. IC Role / Device Role / Timing Role: Low-power non-volatile storage with 5 μA standby current and AAI programming - extends battery life while enabling efficient firmware patching. Use Value: Uniform 4 KByte sector erase allows selective credential updates without disturbing calibrated sensor offsets stored elsewhere in memory. | Use Scenario: Replacing obsolete serial flash in existing consumer electronics designs where PCB layout constraints prohibit package change. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for prior-generation 4 Mbit SPI flash in 8-lead SOIC-150mil footprint - maintains mechanical and electrical compatibility. Use Value: Identical pinout, voltage range, and instruction set to legacy parts reduces redesign effort and qualification time for production continuity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST25VF040B-70-4C-SAE-T | Successor part with identical 4 Mbit density, SOIC-150mil package, and enhanced 70 MHz max read speed; same SuperFlash technology and pinout. | Designed for new designs requiring extended lifecycle support; obsolescence mitigation path for SST25PF040B-80-4C-SAE-T. | Select when sourcing new production builds - offers longer manufacturer support and marginally improved timing margins. |
| AT25DF041-SSH-T | 4 Mbit SPI flash from Microchip (formerly Atmel); 85 MHz max read speed, 100,000-cycle endurance, but uses different status register mapping and lacks AAI programming. | Requires firmware driver adaptation due to distinct instruction set and protection bit layout; no hardware RY/BY# output on SO pin. | Choose only if existing software stack already supports AT25DF series - avoids hardware redesign but increases integration effort. |
Compared with SST25VF040B-70-4C-SAE-T, the SST25PF040B-80-4C-SAE-T offers higher 80 MHz read speed but is marked obsolete; versus AT25DF041-SSH-T, it provides native AAI and hardware busy signaling but requires legacy design context for full feature utilization.
Availability
SST25PF040B-80-4C-SAE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and legacy consumer electronics requiring stable component supply and long-term BOM continuity.
Supply support for SST25PF040B-80-4C-SAE-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded applications.
The SST25PF serial flash product line was engineered for cost-sensitive, space-constrained systems needing reliable non-volatile storage with SPI simplicity and SuperFlash performance advantages.
FAQ
What is the maximum clock frequency supported by SST25PF040B-80-4C-SAE-T during read operations?
The SST25PF040B-80-4C-SAE-T supports up to 80 MHz read speed when operating within the 2.7–3.6V supply range, and 50 MHz at 2.3–2.7V. This is achieved using the High-Speed Read instruction (0BH) with dummy cycle, and is confirmed in the official Microchip datasheet DS20005134B. The '80' in the part number directly references this 80 MHz capability under nominal voltage conditions.
Does SST25PF040B-80-4C-SAE-T support both SPI Mode 0 and Mode 3?
Yes, SST25PF040B-80-4C-SAE-T explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as documented in Section 4.0 of the DS20005134B datasheet. This dual-mode compatibility allows seamless integration with a broad range of microcontroller SPI peripherals without requiring clock polarity inversion logic.
What package type does SST25PF040B-80-4C-SAE-T use, and is it RoHS compliant?
SST25PF040B-80-4C-SAE-T uses an 8-lead SOIC package with 150 mil body width (standard JEDEC MS-012), and is fully RoHS compliant per the manufacturer's declaration in the datasheet. The 'SAE' suffix denotes this specific SOIC-150mil variant, and the 'T' indicates tape-and-reel packaging for automated assembly.
How does the HOLD# pin function on SST25PF040B-80-4C-SAE-T?
The HOLD# pin on SST25PF040B-80-4C-SAE-T suspends an ongoing SPI transaction without resetting internal state or requiring CE# deassertion. When activated (driven low while CE# is active), it places SO in high-impedance and pauses clock synchronization - allowing the host to service higher-priority interrupts before resuming communication at the exact byte boundary.
Is SST25PF040B-80-4C-SAE-T still recommended for new designs?
No - Microchip officially marks SST25PF040B-80-4C-SAE-T as obsolete in the DS20005134B datasheet and recommends SST25VF040B-70-4C-SAE-T as the functional successor. While Aetrix Electronics maintains limited legacy stock for continuity support, new designs should migrate to the VF-series for guaranteed long-term availability and technical support.
SST25PF040B-80-4C-SAE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 80 MHz
- Write Cycle Time - Word, Page:
- 10µs
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25PF040B-80-4C-SAE-T FAQ
1.How can I place an order for SST25PF040B-80-4C-SAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040B-80-4C-SAE-T 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 SST25PF040B-80-4C-SAE-T reliable?
The price and inventory of SST25PF040B-80-4C-SAE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040B-80-4C-SAE-T is usually 5 days.
3.What payment methods are accepted for SST25PF040B-80-4C-SAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040B-80-4C-SAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040B-80-4C-SAE-T?
SST25PF040B-80-4C-SAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040B-80-4C-SAE-T 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 SST25PF040B-80-4C-SAE-T?
For technical support, including SST25PF040B-80-4C-SAE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040B-80-4C-SAE-T requirements.
6.How does Aetrix verify that SST25PF040B-80-4C-SAE-T is sourced from the original manufacturer or authorized distributors?
All SST25PF040B-80-4C-SAE-T 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 SST25PF040B-80-4C-SAE-T meets industry standards.
7.What is the process for return or replacement of SST25PF040B-80-4C-SAE-T?
All SST25PF040B-80-4C-SAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040B-80-4C-SAE-T, 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 SST25PF040B-80-4C-SAE-T part is unused and in its original packaging.
Return procedure for SST25PF040B-80-4C-SAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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