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Microchip Technology SST25PF040B-80-4C-S2AE
- Part No.:
- SST25PF040B-80-4C-S2AE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SST25PF040B-80-4C-S2AE.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
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Product details
Overview
SST25PF040B-80-4C-S2AE 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 erase, and Auto Address Increment (AAI) programming. It delivers 100,000 program/erase cycles and >100 years data retention in industrial control firmware storage.
For engineers reviewing the SST25PF040B-80-4C-S2AE datasheet, SST25PF040B-80-4C-S2AE pinout, SST25PF040B-80-4C-S2AE application, or SST25PF040B-80-4C-S2AE equivalent, key selection criteria include SPI Mode 0/3 compatibility, 8-lead SOIC (150 mil) package, hardware RY/BY# status via SO during AAI, 5 μA standby current, and software block protection with BP3–BP0 bits.
Technical Context
The SST25PF040B-80-4C-S2AE 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 injectors to achieve lower program current and faster erase times than conventional flash.
It integrates dedicated control logic for HOLD# and WP# pins, allowing real-time suspension of serial sequences and selective lockdown of block-protection bits (BPL). The status register provides real-time BUSY/WEL/AAI state visibility, with hardware end-of-write detection configurable via EBSY/DBSY commands to repurpose SO as RY/BY# during AAI programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) organized in uniform 4 KByte sectors, 32 KByte and 64 KByte overlay blocks |
| Supply Voltage | 2.3–3.6V - single-supply operation enables direct connection to 3.3V or 2.5V logic domains without level shifting |
| Max Read Speed | 80 MHz (2.7–3.6V) - supports high-throughput firmware boot and configuration loading |
| Erase Time | 18 ms typical for sector/block - reduces firmware update latency versus standard SPI flash |
| Program Time | 7 μs typical per byte; AAI mode enables sequential word programming without address retransmission |
| Endurance & Retention | 100,000 cycles typical endurance; >100 years data retention - suitable for infrequently updated embedded configuration storage |
| Standby Current | 5 μA typical - minimizes quiescent power in battery-backed or always-on systems |
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 sequence to prevent premature termination |
| SO | Serial Data Output | Outputs read data on falling SCK edge; configurable as RY/BY# status indicator during AAI programming |
| WP# | Write Protect | Enables/disables BPL bit lock-down; when low, restricts modification of block protection bits in status register |
| VSS | Ground | Reference return path for all I/O and core circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6V supply input; decoupling capacitor required near pin for stable read/write operation |
| 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 |
| SI | Serial Data Input | Receives opcodes, addresses, and data; MSB-first protocol aligns with standard SPI controller implementations |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell architecture reduces program current and shortens erase time, lowering total energy per operation |
| Auto Address Increment (AAI) | Eliminates repeated address transmission during multi-byte programming, cutting host CPU overhead and bus occupancy |
| Hardware End-of-Write Detection | EBSY/DBSY commands reconfigure SO pin as RY/BY# signal, removing need for status register polling during AAI |
| Flexible Block Protection | BP3–BP0 bits enable software-selectable protection of upper 1/8, 1/4, 1/2, or full 4 Mbit array - prevents accidental firmware overwrite |
| HOLD# Functionality | Pauses active SPI sequence while preserving internal state, enabling deterministic interrupt response without command restart |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing boot code and calibration parameters in programmable logic controllers subject to wide ambient temperature swings (0°C to +70°C). IC Role / Device Role / Timing Role: Nonvolatile storage for field-upgradable firmware images and persistent system settings accessed during cold start and runtime. Use Value: 100,000-cycle endurance and >100-year data retention ensure reliability across 10+ year product lifecycles without refresh. | Use Scenario: Holding device-specific calibration coefficients and safety-critical configuration flags in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, write-protected configuration store accessed only during initialization or authorized service mode. Use Value: Software block protection (BP3–BP0) and WP#-enabled BPL lock-down prevent unauthorized or accidental modification of medical settings. |
| Automotive Infotainment Boot Loader | IoT Edge Node OTA Update Cache |
Use Scenario: Hosting primary bootloader code in automotive head units requiring fast, deterministic startup under 12V system voltage variation. IC Role / Device Role / Timing Role: High-speed SPI flash providing 80 MHz read access to compressed bootloader image during power-on reset sequence. Use Value: 80 MHz read speed at 2.7–3.6V enables sub-100ms firmware fetch, meeting automotive boot timing requirements. | Use Scenario: Caching downloaded firmware patches in battery-powered smart sensors before atomic application. IC Role / Device Role / Timing Role: Low-power nonvolatile buffer that retains update payloads during intermittent connectivity and brown-out events. Use Value: 5 μA standby current extends battery life in sleep mode; AAI programming accelerates patch commit after download completion. |
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; identical pinout, same 4 Mbit density, enhanced 100 MHz max read speed (3.0–3.6V), improved write endurance (100K cycles guaranteed min) | Drop-in replacement for new designs; supports same SOIC-8 (150 mil) footprint and SPI command set | Select SST25VF040B for new designs requiring extended longevity or higher read bandwidth; SST25PF040B-80-4C-S2AE remains viable for legacy repair or cost-sensitive volume production where 80 MHz suffices |
| AT25DF041A | 4 Mbit SPI flash with 75 MHz max read (2.7–3.6V); supports standard SPI commands but lacks AAI programming and hardware RY/BY# on SO | Requires host-side address management for multi-byte writes; no hardware busy indication during programming | Choose AT25DF041A only if AAI and SO-based RY/BY# are not required; verify compatibility with existing HOLD#/WP# timing constraints |
Compared with SST25VF040B, the SST25PF040B-80-4C-S2AE offers proven field reliability at slightly lower speed and no guaranteed minimum endurance spec, while AT25DF041A trades AAI efficiency and hardware status signaling for broader vendor availability and simplified driver support.
Availability
SST25PF040B-80-4C-S2AE is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device configuration memory, and automotive infotainment boot loader applications requiring stable component supply and long-term obsolescence management.
Supply support for SST25PF040B-80-4C-S2AE 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 manufacturer specializing in microcontrollers, analog devices, and nonvolatile memory solutions for embedded systems.
The SST25PF040B-80-4C-S2AE belongs to Microchip's 25 series Serial Flash family, designed specifically for cost-sensitive, space-constrained embedded applications requiring reliable, low-pin-count nonvolatile storage with SPI interface compatibility.
FAQ
What is the maximum clock frequency supported by SST25PF040B-80-4C-S2AE during read operations?
The SST25PF040B-80-4C-S2AE 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 cycle. The standard Read instruction (03H) supports 33 MHz (2.7–3.6V) or 25 MHz (2.3–2.7V). The "80" in the part number explicitly denotes the 80 MHz capability.
Does SST25PF040B-80-4C-S2AE support both SPI Mode 0 and Mode 3?
Yes, SST25PF040B-80-4C-S2AE is fully compatible with both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). Input data (SI) is sampled on the rising edge of SCK in both modes, and output data (SO) is driven on the falling edge. The device automatically adapts to the host controller's clock polarity and phase configuration.
How does the HOLD# pin function on SST25PF040B-80-4C-S2AE?
The HOLD# pin on SST25PF040B-80-4C-S2AE suspends an active SPI transaction without deselecting the device or resetting internal state. When CE# is low and HOLD# transitions low coincident with SCK low, the device enters Hold mode: SO goes high-impedance, while SI and SCK may be driven freely. Communication resumes when HOLD# returns high while CE# remains low.
What write protection mechanisms are implemented in SST25PF040B-80-4C-S2AE?
SST25PF040B-80-4C-S2AE implements three-tiered write protection: (1) Hardware WP# pin enabling/disabling BPL bit lock-down, (2) Software block protection via BP3–BP0 bits controlling protected memory regions (none to full 4 Mbit), and (3) Status register write-enable latch (WEL) requiring WREN instruction before any write operation. All layers operate concurrently.
Is SST25PF040B-80-4C-S2AE still recommended for new designs?
No - Microchip designates SST25PF040B-80-4C-S2AE as obsolete. The SST25VF040B is the recommended direct replacement, offering identical pinout, enhanced 100 MHz read speed (3.0–3.6V), and guaranteed 100,000-cycle endurance. SST25PF040B-80-4C-S2AE remains available for legacy repair and continuity, but new designs should use SST25VF040B.
SST25PF040B-80-4C-S2AE 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:
- 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 FAQ
1.How can I place an order for SST25PF040B-80-4C-S2AE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040B-80-4C-S2AE 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 reliable?
The price and inventory of SST25PF040B-80-4C-S2AE 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 is usually 5 days.
3.What payment methods are accepted for SST25PF040B-80-4C-S2AE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040B-80-4C-S2AE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040B-80-4C-S2AE?
SST25PF040B-80-4C-S2AE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040B-80-4C-S2AE 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?
For technical support, including SST25PF040B-80-4C-S2AE 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 requirements.
6.How does Aetrix verify that SST25PF040B-80-4C-S2AE is sourced from the original manufacturer or authorized distributors?
All SST25PF040B-80-4C-S2AE 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 meets industry standards.
7.What is the process for return or replacement of SST25PF040B-80-4C-S2AE?
All SST25PF040B-80-4C-S2AE units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040B-80-4C-S2AE, 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 part is unused and in its original packaging.
Return procedure for SST25PF040B-80-4C-S2AE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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