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Microchip Technology SST25PF040B-80-4C-SAE
- Part No.:
- SST25PF040B-80-4C-SAE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040B-80-4C-SAE.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
SST25PF040B-80-4C-SAE 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 SPI Modes 0 and 3, delivers up to 80 MHz read speed (at 2.7–3.6V), features uniform 4 KByte sectors and 64 KByte overlay blocks, and is rated for 100,000 program/erase cycles with >100 years data retention - deployed in industrial control boot loaders and IoT sensor node firmware storage.
For engineers reviewing the SST25PF040B-80-4C-SAE datasheet, SST25PF040B-80-4C-SAE pinout, SST25PF040B-80-4C-SAE application, or SST25PF040B-80-4C-SAE equivalent, key selection considerations include its 80 MHz high-speed read capability, Auto Address Increment (AAI) programming mode, hardware RY/BY# status output via SO pin during AAI, HOLD#/WP# dual protection pins, and compatibility with legacy 8-lead SOIC (150 mil) footprints.
Technical Context
The SST25PF040B-80-4C-SAE implements a four-wire SPI interface with dedicated SI/SO/SCK/CE# lines plus HOLD# and WP# control pins, enabling suspend-on-demand and selective write lockdown. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve lower active current (10 mA typical) and faster erase times (18 ms sector-erase, 35 ms chip-erase) versus conventional NOR flash.
It supports three erase granularities - 4 KByte sectors, 32 KByte blocks, and 64 KByte blocks - with software-configurable block protection (BP3–BP0 bits) and lock-down (BPL) via status register. The device defaults to Byte-Program mode but enters AAI mode upon ADH command, allowing sequential two-byte writes without reissuing addresses - critical for rapid firmware updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) organized as uniform 4 KByte erasable sectors |
| Supply Voltage | 2.3–3.6V - enables direct interfacing with 3.3V and 2.5V logic domains without level shifters |
| Max Read Speed | 80 MHz (2.7–3.6V) - supports XIP (execute-in-place) from flash at sub-100 ns effective access time |
| Write Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ year product life |
| Data Retention | >100 years - ensures firmware integrity across extended shelf life and unpowered storage |
| Active Read Current | 10 mA typical - reduces system power budget during boot-time code fetch sequences |
| Standby Current | 5 μA typical - enables ultra-low-power sleep modes in battery-operated edge devices |
Pinout & Package
Package: 8-lead SOIC (150 mil), RoHS-compliant, surface-mount. Pin assignments are identical across SOIC (150 mil), SOIC (200 mil), and WSON (6 mm × 5 mm) variants per Figure 2-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout full instruction cycle (e.g., read, erase, program) |
| SO | Serial Data Output | Drives read data on falling SCK edge; reconfigurable as RY/BY# status output during AAI programming |
| WP# | Write Protect | Enables/disables BPL bit lock-down; when low, prevents modification of BP3–BP0 unless BPL=0 |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device - preserves internal address pointer and state |
| SCK | Serial Clock | Timing reference; rising edge latches SI input, falling edge shifts SO output; supports Mode 0 (SCK idle low) and Mode 3 (SCK idle high) |
| SI | Serial Data Input | Accepts opcodes, addresses, and data MSB-first on rising SCK edge |
| VDD | Power Supply | 2.3–3.6V supply input; powers core logic and memory array |
| VSS | Ground | Reference return path for all digital and memory operations |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time by eliminating address retransmission for sequential writes - essential for fast firmware patching |
| Hardware RY/BY# Status on SO Pin | Enables real-time busy/ready indication during AAI without polling - cuts CPU overhead and improves deterministic timing |
| Dual Write Protection Scheme | Combines hardware WP# pin control with software-configurable BP3–BP0 bits and BPL lock-down - prevents accidental or malicious firmware corruption |
| Flexible Erase Architecture | Supports 4 KByte sector, 32 KByte block, and 64 KByte block erase - allows precise wear leveling and partial image updates |
| High-Speed Read (80 MHz) | Enables efficient execute-in-place (XIP) operation from flash in microcontroller-based systems with tight boot-time constraints |
Applications
| Firmware Storage in Industrial PLCs | Secure Boot Code Storage in Medical Devices |
|---|---|
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 boot loader execution source; provides deterministic 80 MHz read access for fast startup and runtime code fetch. Use Value: 100,000-cycle endurance and >100-year data retention ensure firmware integrity over 15+ year equipment lifetimes without field replacement. |
Use Scenario: Holding certified boot firmware and cryptographic keys in Class II medical sensors requiring IEC 62304 compliance and secure update mechanisms. IC Role / Device Role / Timing Role: Trusted code repository with hardware/software write protection; WP# and BPL bits prevent unauthorized modification during device servicing. Use Value: Dual protection scheme (WP# + BPL) meets FDA design control requirements for immutable boot code and tamper-evident update logs. |
| Edge Node Firmware in Smart Metering | Configuration Storage in Automotive Telematics |
Use Scenario: Storing OTA-updatable firmware and calibration tables in battery-powered smart electricity meters deployed in utility grids. IC Role / Device Role / Timing Role: Low-power non-volatile memory supporting AAI programming for rapid field updates and 5 μA standby current to extend battery life. Use Value: AAI mode cuts programming time by ~40% vs. byte-program, reducing radio-on time and extending 10-year battery life by minimizing active energy draw. |
Use Scenario: Retaining vehicle-specific configuration data (e.g., CAN bus mapping, display settings) across ignition cycles in automotive infotainment head units. IC Role / Device Role / Timing Role: Persistent parameter storage with HOLD# support to pause reads during CAN interrupt bursts - avoids bus contention and data corruption. Use Value: HOLD# pin allows seamless suspension/resumption of SPI transfers without resetting internal state - critical for real-time automotive communication stacks. |
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 |
|---|---|---|---|
| SST25VF040B | Direct successor; same pinout, identical 4 Mbit density and 80 MHz speed, but improved ECC and enhanced ESD robustness per DS20005134B footnote | Recommended for new designs; supports same firmware images and layout, with higher reliability in noisy automotive/industrial environments | Select SST25VF040B for production builds - SST25PF040B is obsolete per Microchip documentation |
| AT25DF041A | 4 Mbit SPI flash with 75 MHz max read speed, 2.7–3.6V only, no HOLD# pin, different status register bit layout (BP2/BP1/BP0 only) | Lacks suspend capability and fine-grained 4 KByte sector protection; requires firmware driver changes for block protection and status polling | Use only if SST25PF040B-80-4C-SAE footprint and HOLD# functionality are not required |
Compared with SST25VF040B, the SST25PF040B-80-4C-SAE lacks updated ECC and fails newer AEC-Q100 stress tests; compared with AT25DF041A, it offers superior suspend control and more flexible block protection - making it suitable only for legacy repair or drop-in replacement where SST25VF040B is unavailable.
Availability
SST25PF040B-80-4C-SAE is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device boot code retention, and smart metering OTA update buffering requiring stable component supply across long-lifecycle programs.
Supply support for SST25PF040B-80-4C-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 U.S.-based semiconductor company specializing in microcontrollers, analog components, and memory solutions for embedded systems.
The SST25PF040B-80-4C-SAE belongs to Microchip's 25-series Serial Flash family, engineered for cost-sensitive, space-constrained applications requiring reliable non-volatile storage with SPI simplicity and high-speed read performance.
FAQ
What is the maximum clock frequency supported by SST25PF040B-80-4C-SAE during read operations?
The SST25PF040B-80-4C-SAE 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 a dummy byte, enabling efficient execute-in-place (XIP) operation. The "80" in the part number explicitly denotes this 80 MHz capability, verified in DS20005134B Section 4.4.2.
Does SST25PF040B-80-4C-SAE support both SPI Mode 0 and Mode 3?
Yes, SST25PF040B-80-4C-SAE is fully compatible with SPI Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), as confirmed in DS20005134B Section 4.0. The device samples SI on the rising edge and drives SO on the falling edge of SCK in both modes, differing only in SCK idle state - low for Mode 0, high for Mode 3 - ensuring interoperability with diverse host controllers.
How does the HOLD# pin function in SST25PF040B-80-4C-SAE?
The HOLD# pin in SST25PF040B-80-4C-SAE suspends an ongoing SPI transaction without deselecting the device or resetting internal state. When asserted low while CE# is active, it places SO in high-impedance and freezes the address pointer. Communication resumes upon deasserting HOLD#, preserving timing context - critical for interrupt-driven systems where SPI must yield to higher-priority events.
What erase granularities are supported by SST25PF040B-80-4C-SAE?
SST25PF040B-80-4C-SAE supports three erase granularities: uniform 4 KByte sectors (instruction 20H), 32 KByte overlay blocks (52H), and 64 KByte overlay blocks (D8H). Each granularity maps to distinct address-bit fields (A12, A15, A16 respectively), enabling precise wear leveling and partial firmware updates without affecting adjacent memory regions.
Is SST25PF040B-80-4C-SAE still recommended for new designs?
No - SST25PF040B-80-4C-SAE is marked obsolete in DS20005134B, with Microchip recommending SST25VF040B as its direct replacement. The SST25VF040B maintains identical pinout, timing, and command set while adding enhanced reliability features. For new designs, SST25VF040B should be selected; SST25PF040B-80-4C-SAE is appropriate only for legacy repair or continuity sourcing.
SST25PF040B-80-4C-SAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- 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 FAQ
1.How can I place an order for SST25PF040B-80-4C-SAE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040B-80-4C-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 SST25PF040B-80-4C-SAE reliable?
The price and inventory of SST25PF040B-80-4C-SAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040B-80-4C-SAE is usually 5 days.
3.What payment methods are accepted for SST25PF040B-80-4C-SAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040B-80-4C-SAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040B-80-4C-SAE?
SST25PF040B-80-4C-SAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040B-80-4C-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 SST25PF040B-80-4C-SAE?
For technical support, including SST25PF040B-80-4C-SAE 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 requirements.
6.How does Aetrix verify that SST25PF040B-80-4C-SAE is sourced from the original manufacturer or authorized distributors?
All SST25PF040B-80-4C-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 SST25PF040B-80-4C-SAE meets industry standards.
7.What is the process for return or replacement of SST25PF040B-80-4C-SAE?
All SST25PF040B-80-4C-SAE units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040B-80-4C-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 SST25PF040B-80-4C-SAE part is unused and in its original packaging.
Return procedure for SST25PF040B-80-4C-SAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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