My Inquiry
My Account
Microchip Technology SST26VF040AT-104I/MF
- Part No.:
- SST26VF040AT-104I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST26VF040AT-104I/MF.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST26VF040AT-104I/MF from Microchip Technology is a 4-Mbit Serial Quad I/O™ (SQI™) Flash memory IC designed for high-speed, low-pin-count embedded storage in space-constrained applications. It operates at 2.7V–3.6V with 104 MHz max clock frequency (Industrial grade), supports x1/x2/x4 SPI and full SQI protocols, features uniform 4-Kbyte sectors and 32/64-Kbyte overlay blocks, and delivers 100,000 write/erase cycles with >100-year data retention.
For engineers reviewing the SST26VF040AT-104I/MF datasheet, SST26VF040AT-104I/MF pinout, SST26VF040AT-104I/MF application, or SST26VF040AT-104I/MF equivalent, key selection considerations include its dual-mode interface (SPI/SQI), hardware/software write protection architecture, 2-Kbyte OTP Security ID, burst-read flexibility, and AEC-Q100 qualification for automotive use.
Technical Context
The SST26VF040AT-104I/MF implements a six-wire, 4-bit multiplexed I/O interface (SIO[3:0]) supporting both Mode 0 and Mode 3 SPI timing, enabling up to 4× throughput versus traditional SPI at identical clock rates. Its SuperFlash® split-gate CMOS technology enables single-supply 2.3V–3.6V operation with fast erase (20 ms sector, 40 ms chip) and page-program (256-byte pages).
It integrates configurable I/O functionality via the IOC bit: pins default to SPI mode (SI/SO/WP#/HOLD#) but reassign to SIO[0:3] and RESET# when enabled for SQI. The device includes dual protection layers-software-controlled BP bits in STATUS register and hardware WP# pin with WPEN/IOC dependency-and supports write-suspend for concurrent block access.
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 |
| Max Clock Frequency | 104 MHz (2.7V–3.6V, Industrial temp range); enables high-throughput read/write in SQI mode |
| Interface Protocols | Full SPI (x1/x2) + Serial Quad I/O™ (x4); backward-compatible boot mode defaults to SPI |
| Write Endurance | 100,000 program/erase cycles minimum - ensures long-term reliability in firmware update scenarios |
| Data Retention | Greater than 100 years - suitable for unattended industrial and automotive control systems |
| Operating Voltage | 2.7V–3.6V (Industrial), or 2.3V–3.6V (Extended); single-supply simplifies power design |
| Temperature Range | Industrial: –40°C to +85°C; AEC-Q100 qualified - validated for automotive ECUs and infotainment |
Pinout & Package
Package: 8-contact WDFN (6 mm × 5 mm), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low enable signal; must remain low throughout command sequence and data transfer |
| SIO[0] / SI | Serial Data Input | Default SPI input (SI) or quad I/O line (SIO0); latched on rising SCK edge |
| SIO[1] / SO | Serial Data Output | Default SPI output (SO) or quad I/O line (SIO1); driven on falling SCK edge |
| SIO[2] / WP# | Write-Protect Input | Hardware write-protection control; functional only in SPI x1/x2 mode when IOC=0 and WPEN=1 |
| SIO[3] / RESET# / HOLD# | Multi-function Terminal | Configurable as hardware reset (RST#) or hold (HOLD#); RST# requires RSTHLD=1 in Configuration register |
| SCK | Serial Clock | Timing reference; commands/data latched on rising edge, output shifted on falling edge |
| VDD | Power Supply | 2.7V–3.6V supply input; decoupling required per layout guidelines |
| VSS | Ground | Reference ground plane connection; critical for signal integrity in high-speed SQI mode |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O Interface | Enables 4-bit multiplexed data transfers (SIO[3:0]), quadrupling bandwidth vs. standard SPI at same clock rate |
| Flexible Erase Architecture | Uniform 4-Kbyte sectors + 32-Kbyte and 64-Kbyte overlay blocks allow granular firmware partitioning and OTA update management |
| Security ID (OTP) | 2-Kbyte area with factory-programmed 128-bit unique ID + user-programmable segment; lockable via LSID command |
| Write-Suspend Capability | Allows suspension of active program/erase to service urgent reads from other memory regions - essential for real-time systems |
| Dual Write Protection | Software (BP bits + BPL lock) and hardware (WP# pin with WPEN/IOC gating) layers prevent unintended firmware corruption |
Applications
| Automotive ECU Firmware Storage | Industrial PLC Boot Memory |
|---|---|
Use Scenario: Storing boot code and calibration data in engine control units requiring AEC-Q100 compliance and extended temperature operation. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with fast random read access and secure field-upgrade capability via page-program and sector-erase. Use Value: AEC-Q100 qualification, 100K-cycle endurance, and >100-year retention ensure reliable operation over vehicle lifetime without refresh. | Use Scenario: Holding configuration parameters and ladder logic in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Persistent parameter storage with hardware write-protection (WP#) to prevent accidental overwrite during maintenance or power transients. Use Value: Dual protection (WP# pin + software BP bits) and 4-Kbyte sector granularity enable safe, field-serviceable updates without full reflash. |
| Medical Device Bootloader | Networking Equipment Configuration |
Use Scenario: Secure bootloader storage in Class II medical devices where firmware integrity and traceability are regulated. IC Role / Device Role / Timing Role: Trusted boot source with OTP Security ID for device authentication and anti-counterfeiting. Use Value: Factory-programmed 128-bit ID + user-programmable 2-Kbyte Sec ID space supports regulatory traceability and secure key binding. | Use Scenario: Storing MAC addresses, VLAN settings, and firmware images in Ethernet switches and routers. IC Role / Device Role / Timing Role: High-reliability configuration memory supporting rapid burst reads and atomic sector updates during network failover. Use Value: 104 MHz SQI interface enables sub-100 µs read latency; write-suspend allows concurrent config access during firmware load. |
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 | 4-Mbit SPI-only (no SQI), 104 MHz max, 2.7V–3.6V, same SOIC/WDFN packages | Lacks SQI interface and Security ID; no AEC-Q100 qualification | Select when SQI bandwidth or automotive qualification is unnecessary and cost optimization is primary |
| Cypress S25FL004A | 4-Mbit SPI flash, 85 MHz max, 2.7V–3.6V, supports Dual/Quad SPI but not SQI protocol | No OTP Security ID; no AEC-Q100 rating; slower max clock limits burst throughput | Choose for legacy SPI designs requiring pin compatibility and proven field history, without need for SQI or security features |
Compared with SST26VF040AT-104I/MF, W25Q40EW offers lower cost but omits SQI acceleration and automotive qualification, while S25FL004A provides mature SPI compatibility yet lacks the 104 MHz SQI performance and integrated Security ID - making SST26VF040AT-104I/MF optimal for new automotive and high-bandwidth embedded designs.
Availability
SST26VF040AT-104I/MF is available at Aetrix Electronics and suitable for automotive ECU firmware storage, industrial PLC boot memory, medical device bootloader, and networking equipment configuration requiring stable component supply and long-term lifecycle support.
Supply support for SST26VF040AT-104I/MF 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 leading provider of microcontrollers, analog components, and Flash memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software platforms.
The SST26VF040AT-104I/MF belongs to Microchip's Serial Quad I/O™ Flash family, engineered specifically for high-performance, low-pin-count embedded storage in automotive and industrial systems demanding AEC-Q100 reliability and secure firmware management.
FAQ
What interface modes does the SST26VF040AT-104I/MF support?
The SST26VF040AT-104I/MF supports both traditional SPI (x1/x2) and Serial Quad I/O™ (x4) protocols. It powers up in SPI mode for backward compatibility and transitions to SQI mode via the EQIO command. Pin functions (e.g., SIO[3:0]) are reconfigured based on the IOC bit in the Configuration register, enabling flexible integration across legacy and next-generation host controllers.
How is hardware write protection implemented on the SST26VF040AT-104I/MF?
Hardware write protection on the SST26VF040AT-104I/MF uses the WP# pin in conjunction with the WPEN and IOC bits in the Configuration register. WP# is active only in SPI x1/x2 mode (IOC=0) and requires WPEN=1. When asserted low, it locks the Block Protect Lock (BPL) bit, preventing changes to BP0–BP3. This complements software-based protection and ensures robust firmware integrity during power-up or system faults.
Does the SST26VF040AT-104I/MF include security features for device authentication?
Yes, the SST26VF040AT-104I/MF includes a 2-Kbyte One-Time-Programmable Security ID with a factory-programmed 128-bit unique identifier and a user-programmable area. The PSID command writes to the user area, and the LSID command permanently locks the entire Security ID space. Once locked (SEC bit = 1), no further writes are possible - providing tamper-resistant device identity for secure boot and anti-cloning.
What is the significance of the "T-104" suffix in SST26VF040AT-104I/MF?
The "T-104" in SST26VF040AT-104I/MF denotes the maximum operating clock frequency: 104 MHz under 2.7V–3.6V supply at Industrial temperature (–40°C to +85°C). This distinguishes it from lower-speed variants (e.g., -80 for 80 MHz) and confirms its suitability for high-bandwidth SQI applications such as fast firmware loading and real-time configuration access.
Is the SST26VF040AT-104I/MF qualified for automotive applications?
Yes, the SST26VF040AT-104I/MF is explicitly AEC-Q100 qualified for automotive applications. It meets stress test requirements for temperature cycling, humidity, and electrical robustness across the Industrial temperature range (–40°C to +85°C), and its packaging (WDFN) and reliability specs (100K cycles, >100-year retention) align with automotive ECU and infotainment system lifecycles.
SST26VF040AT-104I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST26 SQI®
- Package/Case:
- 8-WDFN Exposed Pad
- 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 - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 1.5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (5x6)
SST26VF040AT-104I/MF FAQ
1.How can I place an order for SST26VF040AT-104I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST26VF040AT-104I/MF 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 SST26VF040AT-104I/MF reliable?
The price and inventory of SST26VF040AT-104I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST26VF040AT-104I/MF is usually 5 days.
3.What payment methods are accepted for SST26VF040AT-104I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST26VF040AT-104I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST26VF040AT-104I/MF?
SST26VF040AT-104I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST26VF040AT-104I/MF 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 SST26VF040AT-104I/MF?
For technical support, including SST26VF040AT-104I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST26VF040AT-104I/MF requirements.
6.How does Aetrix verify that SST26VF040AT-104I/MF is sourced from the original manufacturer or authorized distributors?
All SST26VF040AT-104I/MF 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 SST26VF040AT-104I/MF meets industry standards.
7.What is the process for return or replacement of SST26VF040AT-104I/MF?
All SST26VF040AT-104I/MF units undergo pre-shipment inspection (PSI). If there is an issue with SST26VF040AT-104I/MF, 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 SST26VF040AT-104I/MF part is unused and in its original packaging.
Return procedure for SST26VF040AT-104I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST26VF040AT-104I/MF 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…
