My Inquiry
My Account
Microchip Technology SST25VF040B-50-4C-SAF-T
- Part No.:
- SST25VF040B-50-4C-SAF-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25VF040B-50-4C-SAF-T.pdf
- Description:
- IC FLASH 4MBIT SPI 50MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:16,482
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST25VF040B-50-4C-SAF-T from Microchip Technology is a 4-Mbit SPI serial Flash memory IC with single-supply operation (2.7V–3.6V), 50 MHz max clock frequency, and SuperFlash® technology enabling 100,000 program/erase cycles and >100 years data retention. It supports uniform 4-Kbyte sectors, 32-Kbyte and 64-Kbyte overlay blocks, and is used for firmware storage in microcontroller boot loaders and embedded system configuration.
For engineers reviewing the SST25VF040B-50-4C-SAF-T datasheet, SST25VF040B-50-4C-SAF-T pinout, SST25VF040B-50-4C-SAF-T application, or SST25VF040B-50-4C-SAF-T equivalent, key selection considerations include SPI Mode 0/3 compatibility, hardware/software write protection via WP# and STATUS register, HOLD# suspend capability, AAI programming efficiency, and industrial temperature range (-40°C to +85°C) support.
Technical Context
The SST25VF040B-50-4C-SAF-T implements a four-wire SPI interface with CE#, SCK, SI, and SO pins, supporting both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). Its internal architecture includes a split-gate SuperFlash® memory array, X/Y decoders, and dedicated control logic for erase/program operations.
It features dual end-of-write detection: software polling of the BUSY bit in the STATUS register and hardware RY/BY# status output on SO during Auto Address Increment (AAI) programming when enabled via EBSY (70H) command. The HOLD# pin suspends ongoing serial sequences without resetting internal state, while WP# enables lock-down of block protection bits (BP3–BP0 and BPL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes), organized as uniform 4-Kbyte sectors with 32-Kbyte and 64-Kbyte overlay blocks |
| Supply Voltage | 2.7V–3.6V - enables direct interfacing with 3.3V logic systems without level shifting |
| Max Clock Frequency | 50 MHz - supports high-speed High-Speed Read (0BH) with dummy cycle for throughput-critical firmware fetch |
| Endurance | 100,000 program/erase cycles - ensures reliable field updates in industrial firmware storage applications |
| Data Retention | >100 years - guarantees long-term integrity of stored configuration and calibration data |
| Active Read Current | 10 mA (typical) - minimizes power draw during active code execution from Flash |
| Standby Current | 5 µA (typical) - supports ultra-low-power sleep modes in battery-backed or energy-harvesting systems |
Pinout & Package
Package: 8-contact WSON (6 mm × 5 mm), RoHS-compliant, moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence; high-to-low transition initiates operation |
| SO | Serial Data Output | Outputs read data on falling SCK edge; reconfigurable as RY/BY# status indicator during AAI programming |
| WP# | Write-Protect | Enables/disables STATUS register lock-down (BPL bit); controls software block protection activation |
| VSS | Ground | Reference ground for all I/O and core circuitry; requires low-impedance connection to system GND plane |
| VDD | Power Supply | Primary 2.7V–3.6V supply; bypass capacitor (0.1 µF) required near pin for noise suppression |
| HOLD# | Hold | Suspends ongoing SPI transaction without deselecting device; preserves internal address pointer and state |
| SCK | Serial Clock | Provides timing reference; inputs latched on rising edge, outputs shifted on falling edge |
| SI | Serial Data Input | Accepts commands, addresses, and data; MSb-first protocol compliant with SPI standard |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time by eliminating repeated address transmission for sequential word writes |
| Flexible Erase Granularity | Supports sector (4 KB), block (32 KB/64 KB), and chip-level erase - enables precise firmware patching without full reflash |
| Dual Write Protection | Combines hardware WP# pin control with software-configurable BP3–BP0 bits for layered security against accidental overwrite |
| HOLD# Pin Functionality | Allows interruption of SPI communication (e.g., during interrupt servicing) without losing context or requiring reinitialization |
| Hardware End-of-Write Detection | EBSY (70H) command configures SO pin as real-time RY/BY# indicator - eliminates polling overhead in time-sensitive applications |
Applications
| Firmware Boot Storage | Embedded Configuration Memory |
|---|---|
|
Use Scenario: Stores bootloader and application firmware for ARM Cortex-M or PIC microcontrollers during cold start and OTA updates. IC Role / Device Role / Timing Role: Non-volatile code storage with deterministic read latency and fast sector erase for incremental firmware patches. Use Value: Enables secure, field-upgradable firmware with 100,000-cycle endurance and >100-year data retention at -40°C to +85°C. |
Use Scenario: Holds device-specific calibration tables, network credentials, and user preferences in industrial sensors and gateways. IC Role / Device Role / Timing Role: Parameter storage with software write protection (BP bits) and hardware WP# pin to prevent corruption during brown-out events. Use Value: Guarantees data integrity across power cycles using SuperFlash® technology and 5 µA standby current for battery longevity. |
| Secure Key Storage | Real-Time OS Image Caching |
|
Use Scenario: Stores cryptographic keys and certificates in trusted execution environments where tamper resistance is critical. IC Role / Device Role / Timing Role: Secure non-volatile memory with lock-down capability (BPL bit) preventing unauthorized modification of protection bits. Use Value: Achieves hardware-enforced write lockdown when WP# is asserted low, meeting basic secure element requirements for key persistence. |
Use Scenario: Caches RTOS kernel images and driver binaries in edge computing nodes to reduce boot time after reset. IC Role / Device Role / Timing Role: High-throughput read memory supporting 50 MHz High-Speed Read (0BH) with dummy cycle for burst-mode instruction fetch. Use Value: Delivers 50 MHz read performance with wrap-around addressing, accelerating boot sequence by up to 2× vs. standard 25 MHz Read mode. |
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 |
|---|---|---|---|
| AT25DF041A-SSH-T | 4-Mbit SPI Flash with 85 MHz max clock, but requires 2.7V–3.6V supply and lacks HOLD# pin | Higher speed read suitable for bandwidth-constrained systems; no suspend capability limits use in interrupt-driven contexts | Select when maximum read throughput is prioritized over transaction suspension and industrial temp range is not required |
| W25Q40EWUXIE | 4-Mbit SPI Flash with Quad I/O support, 104 MHz DTR read, and built-in 256-byte page buffer; operates at 1.65V–1.95V/2.7V–3.6V | Enables faster bulk reads via Quad mode but requires additional I/O lines and different command set | Select when migrating to Quad SPI infrastructure and higher density scalability (up to 256 Mbit) is anticipated |
Compared with AT25DF041A-SSH-T and W25Q40EWUXIE, the SST25VF040B-50-4C-SAF-T offers unique HOLD# functionality for deterministic SPI pause/resume, guaranteed industrial temperature operation (-40°C to +85°C), and proven SuperFlash® reliability-making it optimal for cost-sensitive, interrupt-aware embedded systems where pin count and thermal robustness are critical.
Availability
SST25VF040B-50-4C-SAF-T is available at Aetrix Electronics and suitable for firmware boot storage, embedded configuration memory, and secure key storage requiring stable component supply, long-lifecycle support, and industrial-grade temperature performance.
Supply support for SST25VF040B-50-4C-SAF-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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The SST25VF040B-50-4C-SAF-T belongs to Microchip's 25-series Serial Flash family, designed specifically for cost-effective, low-pin-count non-volatile storage in resource-constrained embedded systems requiring high reliability and industrial temperature operation.
FAQ
What is the operating voltage range for the SST25VF040B-50-4C-SAF-T?
The SST25VF040B-50-4C-SAF-T operates from 2.7V to 3.6V. This single-supply range allows direct integration with standard 3.3V logic families without external level shifters. Operation outside this range may cause unreliable read/write behavior or permanent damage. The SST25VF040B-50-4C-SAF-T does not support 1.8V or 5V interfaces.
Does the SST25VF040B-50-4C-SAF-T support both SPI Mode 0 and Mode 3?
Yes, the SST25VF040B-50-4C-SAF-T is fully compatible with SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1). The device samples SI on the rising edge and drives SO on the falling edge of SCK in both modes. The SST25VF040B-50-4C-SAF-T automatically adapts to either mode based on host controller configuration - no hardware or firmware reconfiguration is needed.
How does the HOLD# pin function in the SST25VF040B-50-4C-SAF-T?
The HOLD# pin in the SST25VF040B-50-4C-SAF-T 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 pauses clock synchronization. Communication resumes immediately upon deasserting HOLD#. This feature is essential for interrupt handling in real-time systems using the SST25VF040B-50-4C-SAF-T.
What erase options are available on the SST25VF040B-50-4C-SAF-T?
The SST25VF040B-50-4C-SAF-T supports four erase granularities: byte-program (no erase needed for FFH-aligned writes), 4-Kbyte sector erase (20H), 32-Kbyte block erase (52H), 64-Kbyte block erase (D8H), and full-chip erase (60H/C7H). All erase operations are self-timed and report completion via BUSY bit or hardware RY/BY# on SO. The SST25VF040B-50-4C-SAF-T requires unprotected memory regions for any erase command to execute.
Is the SST25VF040B-50-4C-SAF-T qualified for industrial temperature operation?
Yes, the SST25VF040B-50-4C-SAF-T is rated for industrial temperature range: -40°C to +85°C. This specification applies to the -4C suffix variant, confirming full functionality including program/erase endurance, data retention, and timing parameters across the entire range. The SST25VF040B-50-4C-SAF-T meets JEDEC JESD22-A108 reliability standards for industrial-grade Flash memory.
SST25VF040B-50-4C-SAF-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:
- Active
- 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:
- 50 MHz
- Write Cycle Time - Word, Page:
- 10µs
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25VF040B-50-4C-SAF-T FAQ
1.How can I place an order for SST25VF040B-50-4C-SAF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF040B-50-4C-SAF-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 SST25VF040B-50-4C-SAF-T reliable?
The price and inventory of SST25VF040B-50-4C-SAF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25VF040B-50-4C-SAF-T is usually 5 days.
3.What payment methods are accepted for SST25VF040B-50-4C-SAF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF040B-50-4C-SAF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF040B-50-4C-SAF-T?
SST25VF040B-50-4C-SAF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF040B-50-4C-SAF-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 SST25VF040B-50-4C-SAF-T?
For technical support, including SST25VF040B-50-4C-SAF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF040B-50-4C-SAF-T requirements.
6.How does Aetrix verify that SST25VF040B-50-4C-SAF-T is sourced from the original manufacturer or authorized distributors?
All SST25VF040B-50-4C-SAF-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 SST25VF040B-50-4C-SAF-T meets industry standards.
7.What is the process for return or replacement of SST25VF040B-50-4C-SAF-T?
All SST25VF040B-50-4C-SAF-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF040B-50-4C-SAF-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 SST25VF040B-50-4C-SAF-T part is unused and in its original packaging.
Return procedure for SST25VF040B-50-4C-SAF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25VF040B-50-4C-SAF-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
