My Inquiry
My Account
Microchip Technology SST25WF040B-40I/W13G
- Part No.:
- SST25WF040B-40I/W13G
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- Die
- Datasheet:
-
SST25WF040B-40I/W13G.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ WAFER
- Quantity:
- Payment:
- Shipping:
Inventory:4,566
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST25WF040B-40I/W13G from Microchip Technology is a 4 Mbit (512 KByte), 1.8V SPI serial flash memory IC with SuperFlash technology, supporting dual I/O read modes up to 40 MHz, uniform 4 KByte sector and 64 KByte block erase, and industrial temperature range (–40°C to +85°C). It serves as non-volatile program/data storage in microcontroller-based embedded systems requiring low-power, high-reliability boot code or firmware retention.
For engineers reviewing the SST25WF040B-40I/W13G datasheet, SST25WF040B-40I/W13G pinout, SST25WF040B-40I/W13G application, or SST25WF040B-40I/W13G equivalent, key selection criteria include its 1.65–1.95 V single-supply operation, 2 µA power-down current, software/hardware write protection (WP#/HOLD#), 100,000-program/erase endurance, and SOIC-8 / USON-8 package compatibility.
Technical Context
The SST25WF040B-40I/W13G implements a four-wire SPI interface compliant with Mode 0 and Mode 3 clock polarity/phasing, enabling interoperability with standard microcontroller SPI peripherals. Its internal architecture uses split-gate SuperFlash cells with thick-oxide tunneling injectors for enhanced data retention (>20 years) and reduced program/erase energy versus conventional NOR flash.
It supports multiple high-speed read protocols - including High-Speed Read (0BH, 40 MHz), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) - all operating from a single 1.65–1.95 V supply. Erase granularity includes uniform 4 KByte sectors (128 total) and 64 KByte overlay blocks (8 total), with page programming at 256 bytes per page.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte), organized as 128 × 4 KByte sectors and 8 × 64 KByte blocks |
| Supply Voltage | 1.65–1.95 V - enables direct integration with 1.8 V logic domains without level shifting |
| Max Clock Frequency | 40 MHz - supports high-throughput firmware reads and fast boot loading |
| Page Program Time | 0.8 ms per 256-byte page - reduces firmware update latency in field-programmable devices |
| Endurance & Retention | 100,000 program/erase cycles; >20 years data retention at 85°C - suitable for long-life industrial deployments |
| Power Consumption | 4 mA active read current; 2 µA power-down standby - critical for battery-backed or energy-harvesting systems |
| Operating Temperature | –40°C to +85°C (industrial grade) - validated for automotive body electronics and industrial control environments |
Pinout & Package
Available in two RoHS-compliant packages: 8-lead SOIC (150 mil) and 8-contact USON (2 mm × 3 mm). Both share identical pin functions and electrical behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable (active-low) | Selects device for command execution; must remain low during full instruction cycle |
| SIO0 / SI | Serial Data Input / Dual I/O (pin 5 in SOIC, pin 1 in USON) | Carries commands, addresses, and input data; functions as SIO0 in dual I/O mode |
| SIO1 / SO | Serial Data Output / Dual I/O (pin 2 in SOIC, pin 4 in USON) | Outputs read data; functions as SIO1 in dual I/O mode for parallel bit streaming |
| SCK | Serial Clock | Provides timing reference; samples inputs on rising edge, outputs data on falling edge (Mode 0/3) |
| WP# | Write Protect (active-low) | Enables BPL bit lock-down to prevent accidental status register modification |
| HOLD# | Hold (active-low) | Suspends ongoing SPI transaction without deselecting device - preserves internal state |
| VDD | Power Supply | 1.65–1.95 V supply input; powers core logic and memory array |
| VSS | Ground | Reference return path for all digital and analog circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Read Support | Enables 40 MHz read throughput using SIO0/SIO1 pins - doubles effective data rate vs. standard SPI |
| Flexible Erase Architecture | Independent 4 KByte sector and 64 KByte block erase - allows granular firmware updates without full chip erase |
| Hardware Write Protection | WP# and HOLD# pins provide real-time, hardware-level control over memory access and transaction suspension |
| SuperFlash Technology | Split-gate cell design delivers lower program/erase voltage stress and higher reliability than standard NOR flash |
| Software Block Protection | Status register BP0–BP2/TB/BPL bits enable configurable, non-volatile memory region lockdown - prevents corruption of boot code |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic startup sequence and field-upgradable application code. Use Value: 100,000-cycle endurance and >20-year data retention ensure reliable operation across 15+ year product lifecycles without memory degradation. |
Use Scenario: Holding calibration data, sensor lookup tables, and diagnostic logs in automotive door modules and lighting controllers. IC Role / Device Role / Timing Role: SPI-connected parameter store interfacing directly with 1.8 V microcontrollers under extended temperature conditions. Use Value: –40°C to +85°C rating and 2 µA power-down current support cold-cranking robustness and always-on monitoring functionality. |
| Medical IoT Sensor Node | Smart Energy Meter Boot Memory |
Use Scenario: Retaining firmware and patient-specific calibration profiles in portable, battery-powered diagnostic sensors. IC Role / Device Role / Timing Role: Low-voltage serial flash serving as primary code storage with secure write-protection for regulatory compliance. Use Value: 1.65–1.95 V operation eliminates need for external regulators, reducing BOM cost and PCB area in space-constrained designs. |
Use Scenario: Hosting bootloader and metering firmware in ANSI C12.22-compliant smart electricity meters with tamper-resistant requirements. IC Role / Device Role / Timing Role: Secure, sector-locked memory used for verified firmware execution and encrypted parameter storage. Use Value: Hardware WP# and software BP bits enable hierarchical protection - preventing unauthorized firmware modification while allowing field updates to designated regions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | Same density (4 Mbit), 1.7–1.95 V supply, but lacks HOLD# pin and dual I/O instructions (3BH/BBH); supports only standard SPI and QPI modes | Less suitable for systems requiring transaction suspension or bandwidth-critical dual-I/O reads | Prefer SST25WF040B-40I/W13G when HOLD# functionality or 40 MHz dual-I/O throughput is required |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V supply only - incompatible with 1.8 V systems; supports SFDP but no dual I/O read acceleration | Requires level-shifting or separate power rail in 1.8 V designs; not drop-in compatible | Choose SST25WF040B-40I/W13G for native 1.8 V operation and lower active/standby power consumption |
Compared with W25Q40EW and S25FL004A, the SST25WF040B-40I/W13G uniquely combines 1.8 V operation, HOLD# pin, dual I/O read capability, and 2 µA power-down current - making it optimal for compact, battery-sensitive, and transaction-resilient embedded systems.
Availability
SST25WF040B-40I/W13G is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, medical IoT sensor nodes, smart energy meter boot memory, and portable instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for SST25WF040B-40I/W13G 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 a focus on embedded control and connectivity.
The SST25WF040B-40I/W13G belongs to Microchip's Serial Flash 25 Series, designed specifically for ultra-low-power, high-reliability embedded applications where 1.8 V operation, small footprint, and robust data retention are essential.
FAQ
What is the maximum clock frequency supported by SST25WF040B-40I/W13G?
The SST25WF040B-40I/W13G supports up to 40 MHz for High-Speed Read (0BH), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) instructions. Standard Read (03H) is rated to 30 MHz. All timing specifications assume proper signal integrity, load capacitance ≤ 10 pF, and VDD within 1.65–1.95 V.
Does SST25WF040B-40I/W13G support both SPI Mode 0 and Mode 3?
Yes, the SST25WF040B-40I/W13G 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, ensuring interoperability with diverse host controllers.
How does the HOLD# function work in SST25WF040B-40I/W13G?
In SST25WF040B-40I/W13G, HOLD# suspends an active SPI transaction while CE# remains low. When HOLD# transitions low coincident with SCK low, SO enters high-impedance and communication pauses. Resuming requires HOLD# high while SCK is low. This preserves address and command state without reinitializing the interface.
What is the page size and programming time for SST25WF040B-40I/W13G?
The SST25WF040B-40I/W13G has a fixed page size of 256 bytes. Page-Program time is 0.8 ms (typical) per 256-byte page. Programming requires prior execution of WREN, and target pages must be erased (0xFF) before writing. Partial-page writes are accepted but limited to whole-byte increments.
Is SST25WF040B-40I/W13G available in both SOIC and USON packages?
Yes, SST25WF040B-40I/W13G is offered in 8-lead SOIC (150 mil) and 8-contact USON (2 mm × 3 mm) packages. Both variants share identical pinout, electrical characteristics, and timing specs. The W13G suffix denotes the USON-8 package; SOIC-8 versions use different ordering codes (e.g., SST25WF040B-40I/SO).
SST25WF040B-40I/W13G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- Die
- 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:
- 40 MHz
- Write Cycle Time - Word, Page:
- 1ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- Wafer
SST25WF040B-40I/W13G FAQ
1.How can I place an order for SST25WF040B-40I/W13G through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25WF040B-40I/W13G 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 SST25WF040B-40I/W13G reliable?
The price and inventory of SST25WF040B-40I/W13G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25WF040B-40I/W13G is usually 5 days.
3.What payment methods are accepted for SST25WF040B-40I/W13G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25WF040B-40I/W13G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25WF040B-40I/W13G?
SST25WF040B-40I/W13G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25WF040B-40I/W13G 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 SST25WF040B-40I/W13G?
For technical support, including SST25WF040B-40I/W13G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25WF040B-40I/W13G requirements.
6.How does Aetrix verify that SST25WF040B-40I/W13G is sourced from the original manufacturer or authorized distributors?
All SST25WF040B-40I/W13G 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 SST25WF040B-40I/W13G meets industry standards.
7.What is the process for return or replacement of SST25WF040B-40I/W13G?
All SST25WF040B-40I/W13G units undergo pre-shipment inspection (PSI). If there is an issue with SST25WF040B-40I/W13G, 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 SST25WF040B-40I/W13G part is unused and in its original packaging.
Return procedure for SST25WF040B-40I/W13G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25WF040B-40I/W13G 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…
