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Microchip Technology SST25PF040B-80-4C-S2AE-T
- Part No.:
- SST25PF040B-80-4C-S2AE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SST25PF040B-80-4C-S2AE-T.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,053
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Product details
Overview
SST25PF040B-80-4C-S2AE-T from Microchip Technology is a 4 Mbit SPI serial flash memory IC operating at 2.3–3.6V, supporting 80 MHz read speed (2.7–3.6V), uniform 4 KByte sector/32 KByte & 64 KByte block erase, and Auto Address Increment (AAI) programming. It serves as nonvolatile code/data storage in microcontroller boot loaders, firmware update buffers, and embedded configuration memory.
For engineers reviewing the SST25PF040B-80-4C-S2AE-T datasheet, SST25PF040B-80-4C-S2AE-T pinout, SST25PF040B-80-4C-S2AE-T application, or SST25PF040B-80-4C-S2AE-T equivalent, this page delivers verified electrical specs, SOIC-8 (150 mil) package mapping, SPI Mode 0/3 timing behavior, and real-world replacement guidance for legacy design continuity.
Technical Context
The SST25PF040B-80-4C-S2AE-T implements a four-wire SPI interface with dual-mode clock compatibility (Mode 0 and Mode 3), enabling seamless integration with ARM Cortex-M, PIC, and RISC-V host controllers. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve 100,000 program/erase cycles and >100 years data retention.
Hardware end-of-write detection via SO pin reconfiguration (EBSY/DBSY commands) and software polling of BUSY/WEL bits in the status register provide deterministic write completion signaling. The device supports three erasure granularities-4 KByte sectors, 32 KByte overlay blocks, and 64 KByte overlay blocks-with block protection controlled by BP3–BP0 bits and lock-down enabled by WP#-driven BPL bit.
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 - single supply enables direct connection to 3.3V I/O domains without level shifting |
| Max Read Speed | 80 MHz (2.7–3.6V) - supports high-throughput firmware loading and XIP-capable execution paths |
| Program/Erase Endurance | 100,000 cycles (typical) - sufficient for field firmware updates over 10+ year product lifetimes |
| Data Retention | >100 years - ensures configuration integrity across industrial temperature cycling and long-term storage |
| Active Read Current | 10 mA (typical at 80 MHz) - enables low-power operation in battery-backed or energy-constrained systems |
| Standby Current | 5 μA (typical) - minimizes quiescent power draw during host MCU sleep modes |
Pinout & Package
Package: 8-lead SOIC (150 mils), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequences to prevent premature termination |
| SO | Serial Data Output | Tri-state output delivering read data or hardware busy status (RY/BY#) during AAI programming when configured |
| WP# | Write Protect | Enables/disables status register lock-down (BPL bit); low = BPL active, preventing BP-bit modification |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6V input; decoupling capacitor (0.1 μF ceramic) required within 5 mm of pin per layout guidelines |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; allows host to service higher-priority interrupts |
| SCK | Serial Clock | Timing reference for SI/SO data transfer; rising edge latches input, falling edge drives output (Mode 0/3 compatible) |
| SI | Serial Data Input | Receives opcodes, addresses, and data; MSB-first, synchronous to SCK rising edge |
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 |
| Flexible Erase Architecture | Independent 4 KByte sector, 32 KByte block, and 64 KByte block erase options enable precise wear leveling and partial firmware updates |
| Hardware End-of-Write Detection | SO pin reconfigurable as RY/BY# output during AAI mode - eliminates software polling overhead and improves deterministic timing control |
| Software Write Protection | Configurable block protection via BP3–BP0 bits in status register, with optional lock-down using WP#-controlled BPL bit for secure firmware partitioning |
| Low-Power Standby Mode | 5 μA typical current draw enables persistent storage retention during host MCU deep-sleep states without compromising battery life |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing calibrated sensor offsets, user-defined alarm thresholds, and device-specific calibration coefficients in Class II medical instruments. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and runtime parameter updates via SPI. Use Value: Ensures regulatory-compliant data persistence across 100,000+ write cycles and >100-year retention without external backup power. |
Use Scenario: Holding encrypted bootloader keys and signed firmware images in FDA-cleared diagnostic equipment. IC Role / Device Role / Timing Role: Secure boot memory interfacing with ARM TrustZone-enabled MCUs for authenticated firmware loading. Use Value: Enables hardware-enforced write protection (BP bits + BPL lock-down) to prevent unauthorized firmware modification. |
| Automotive Telematics Bootloader | Smart Energy Meter Code Storage |
Use Scenario: Hosting OTA-updatable bootloader and fallback application images in vehicle infotainment gateways. IC Role / Device Role / Timing Role: Dual-image flash storage supporting atomic firmware swaps and rollback recovery mechanisms. Use Value: 80 MHz high-speed read enables sub-100ms boot time; AAI programming accelerates field firmware patching. |
Use Scenario: Storing tariff tables, communication protocol stacks, and utility-specific metering algorithms in ANSI C12.19-compliant meters. IC Role / Device Role / Timing Role: Field-programmable code repository accessed by 8-bit/32-bit MCUs over SPI under wide temperature range (0°C to +70°C). Use Value: Uniform 4 KByte sector erase allows safe over-the-air updates without disrupting active metering functions. |
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-70-4C-S2AE-T | Successor part with identical pinout, same 4 Mbit density, but rated for 70 MHz max read speed (vs. 80 MHz) and improved ESD robustness | Valid drop-in replacement where 80 MHz timing margin is not required; preferred for new designs due to active status | Select SST25VF040B-70-4C-S2AE-T for production continuity and long-term availability; SST25PF040B-80-4C-S2AE-T remains viable for legacy repair or existing stock utilization |
| AT25DF041A-SSH-T | 4 Mbit SPI flash from Microchip (acquired Atmel); supports 80 MHz read, but uses different status register layout and lacks HOLD# pin functionality | Requires firmware adaptation for status bit interpretation and no hardware hold capability - limits interrupt-handling flexibility | Choose only if migrating from Atmel-based platforms; verify full instruction set compatibility and absence of HOLD#-dependent timing sequences |
Compared with SST25VF040B-70-4C-S2AE-T, the SST25PF040B-80-4C-S2AE-T offers higher read bandwidth but is obsolete; versus AT25DF041A-SSH-T, it provides superior interrupt-aware HOLD# support and consistent BP-bit behavior, critical for real-time firmware update safety.
Availability
SST25PF040B-80-4C-S2AE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive telematics modules requiring stable component supply during legacy design support and repair cycles.
Supply support for SST25PF040B-80-4C-S2AE-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, with emphasis on reliability and long-term product support.
The SST25PF040B-80-4C-S2AE-T belongs to Microchip's Serial Flash family, designed specifically for cost-sensitive, space-constrained embedded systems needing fast, reliable, and low-power nonvolatile storage.
FAQ
What is the maximum clock frequency supported by SST25PF040B-80-4C-S2AE-T during read operations?
The SST25PF040B-80-4C-S2AE-T supports up to 80 MHz read speed when operating within the 2.7–3.6V supply range, and 50 MHz when supplied at 2.3–2.7V. This dual-voltage timing specification is explicitly defined in the official Microchip datasheet DS20005134B, ensuring predictable performance across its full operating voltage window. The "80" in the part number directly reflects this 80 MHz capability.
Is SST25PF040B-80-4C-S2AE-T pin-compatible with SST25VF040B-70-4C-S2AE-T?
Yes, SST25PF040B-80-4C-S2AE-T is pin-compatible with SST25VF040B-70-4C-S2AE-T - both use identical 8-lead SOIC (150 mil) packaging and share identical pin assignments, electrical characteristics, and command sets. Microchip explicitly positions SST25VF040B as the functional successor, confirming mechanical and logical interoperability for drop-in replacement in existing layouts.
Does SST25PF040B-80-4C-S2AE-T support SPI Mode 0 and Mode 3 simultaneously?
Yes, SST25PF040B-80-4C-S2AE-T natively supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). The device detects the idle state of SCK and adapts sampling accordingly: SI is latched on the rising edge, and SO is driven on the falling edge in both modes. This dual-mode compatibility eliminates host controller configuration constraints.
How does hardware end-of-write detection work on SST25PF040B-80-4C-S2AE-T?
Hardware end-of-write detection on SST25PF040B-80-4C-S2AE-T reconfigures the SO pin as an open-drain RY/BY# output during Auto Address Increment (AAI) programming. After issuing the EBSY (70H) command, SO asserts low while busy and releases high upon completion - enabling interrupt-driven write completion without software polling. The DBSY (80H) command disables this mode.
What package type is used by SST25PF040B-80-4C-S2AE-T?
SST25PF040B-80-4C-S2AE-T is packaged in an 8-lead SOIC (150 mils) body, measuring 5.0 mm × 4.0 mm with 1.27 mm lead pitch. This standard surface-mount footprint is fully compatible with automated assembly processes and matches the pinout shown in Figure 2-1 of datasheet DS20005134B. The "S2AE" suffix confirms the SOIC-150 variant.
SST25PF040B-80-4C-S2AE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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-S2AE-T FAQ
1.How can I place an order for SST25PF040B-80-4C-S2AE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040B-80-4C-S2AE-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-S2AE-T reliable?
The price and inventory of SST25PF040B-80-4C-S2AE-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-S2AE-T is usually 5 days.
3.What payment methods are accepted for SST25PF040B-80-4C-S2AE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040B-80-4C-S2AE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040B-80-4C-S2AE-T?
SST25PF040B-80-4C-S2AE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040B-80-4C-S2AE-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-S2AE-T?
For technical support, including SST25PF040B-80-4C-S2AE-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-S2AE-T requirements.
6.How does Aetrix verify that SST25PF040B-80-4C-S2AE-T is sourced from the original manufacturer or authorized distributors?
All SST25PF040B-80-4C-S2AE-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-S2AE-T meets industry standards.
7.What is the process for return or replacement of SST25PF040B-80-4C-S2AE-T?
All SST25PF040B-80-4C-S2AE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040B-80-4C-S2AE-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-S2AE-T part is unused and in its original packaging.
Return procedure for SST25PF040B-80-4C-S2AE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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