My Inquiry
My Account
Microchip Technology SST26VF040AT-80E/SN
- Part No.:
- SST26VF040AT-80E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST26VF040AT-80E/SN.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,435
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST26VF040AT-80E/SN from Microchip Technology is a 4-Mbit Serial Quad I/O™ (SQI™) Flash memory IC designed for high-speed, low-power embedded code storage and data logging. It operates at 2.3V–3.6V, supports 80 MHz max clock frequency (Extended temperature), features uniform 4-Kbyte sectors and 32/64-Kbyte overlay blocks, and delivers 100,000 program/erase cycles with >100-year data retention. It is used in automotive infotainment boot memory and industrial PLC firmware storage.
For engineers reviewing the SST26VF040AT-80E/SN datasheet, SST26VF040AT-80E/SN pinout, SST26VF040AT-80E/SN application, or SST26VF040AT-80E/SN equivalent, key selection considerations include SQI vs. SPI protocol support, 80 MHz timing at extended temperature (−40°C to +125°C), WDFN-8 package footprint, hardware write protection via WP# pin, and OTP Security ID capability.
Technical Context
The SST26VF040AT-80E/SN implements a six-wire, 4-bit multiplexed I/O interface supporting both legacy SPI (x1/x2) and high-throughput SQI (x4) protocols, with Mode 0 and Mode 3 clock polarity compatibility. Its SuperFlash® split-gate cell architecture enables fast erase (20 ms sector, 40 ms chip) and low active current (15 mA @ 80 MHz).
It integrates dual-mode control logic: SPI mode is default at power-up, while EQIO command enables SQI mode; HOLD# and RESET#/HOLD#/SIO3 pins are functional only in SPI modes, not SQI. The device includes a 2-Kbyte OTP Security ID with factory-programmed 128-bit unique identifier and user-programmable area, locked via LSID command.
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 |
| Operating Voltage | 2.3V–3.6V - enables single-supply operation in battery-powered and automotive systems |
| Max Clock Frequency | 80 MHz (Industrial/Extended temp) - supports high-throughput firmware reads without increasing pin count |
| Erase Endurance | 100,000 cycles minimum - suitable for field-upgradable firmware with frequent OTA updates |
| Data Retention | >100 years - ensures long-term reliability in unattended industrial deployments |
| Temperature Range | −40°C to +125°C (Extended) - AEC-Q100 qualified for under-hood automotive applications |
| Security Feature | 2-Kbyte OTP Security ID with 128-bit factory-unique ID and lockable user area - enables secure device authentication |
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 for all serial commands; must remain low during full instruction sequence |
| SIO[3:0] (Pins 2,3,6,8) | Quad I/O Data Bus | Multiplexed bidirectional signals for command/address/data in SQI mode; default SI/SO/SIO2/SIO3 in SPI mode |
| SCK | Serial Clock | Rising edge latches input; falling edge outputs data; supports Mode 0 (low idle) and Mode 3 (high idle) |
| WP# | Hardware Write Protect | Active-low pin enabling BPL bit lock-down when IOC=0 and WPEN=1; disabled in SQI mode |
| HOLD# / RESET# (Pin 6) | Multi-function Control | Configurable via RSTHLD bit: HOLD# pauses SPI transfers; RESET# performs hardware reset (SPI x1/x2 only) |
| VDD / VSS | Power Supply | Single 2.3V–3.6V supply; VSS is ground reference for all I/O and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O Protocol Support | Enables 4× throughput vs. standard SPI at same clock rate, reducing firmware load time in resource-constrained MCUs |
| Write-Suspend Capability | Allows interrupting erase/program operations to service higher-priority reads - critical for real-time logging systems |
| Flexible Block Protection | Software-configurable BP0–BP3 bits protect upper 1/8 to full array; BPL bit prevents accidental reconfiguration |
| OTP Security ID | Factory-programmed 128-bit ID + 2-Kbyte user area provides immutable device identity for secure boot and licensing |
| Low-Power Active Mode | 15 mA typical @ 80 MHz - reduces system-level power budget in always-on telematics modules |
Applications
| Automotive Infotainment Boot Memory | Industrial PLC Firmware Storage |
|---|---|
|
Use Scenario: Stores boot code and OS kernel for head-unit microprocessors requiring fast, reliable startup after ignition cycle. IC Role / Device Role / Timing Role: Primary nonvolatile code storage with SQI interface enabling sub-100ms firmware fetch at −40°C to +125°C. Use Value: AEC-Q100 qualification and 100K-cycle endurance ensure consistent boot performance over 15-year vehicle lifetime. |
Use Scenario: Holds programmable logic controller firmware updated via field service tools or remote diagnostics. IC Role / Device Role / Timing Role: Field-upgradable flash memory supporting secure firmware patches using PSID/LSID and block protection. Use Value: Write-suspend allows background firmware update without halting I/O scanning - maintains deterministic scan cycle timing. |
| Medical Diagnostic Device Configuration | Smart Energy Meter Calibration Data |
|
Use Scenario: Stores calibration coefficients, sensor profiles, and regulatory compliance settings in portable ultrasound equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration storage with OTP Security ID for FDA audit traceability. Use Value: Factory-unique 128-bit ID enables per-device cryptographic binding of calibration data to hardware serial number. |
Use Scenario: Retains meter-specific metrology parameters (e.g., phase compensation, gain trim) across power loss events. IC Role / Device Role / Timing Role: High-reliability data logger with >100-year retention and 4-Kbyte sector granularity for safe parameter updates. Use Value: Uniform 4-Kbyte sectors allow atomic update of calibration tables without risking corruption of adjacent operational data. |
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 W25Q40EWUXIE | 4-Mbit SPI-only (no SQI), 133 MHz max, SOIC-8 and WSON-8 packages; lacks OTP Security ID and write-suspend | Better suited for cost-sensitive consumer electronics where SQI bandwidth and security are unnecessary | Select when SQI protocol and AEC-Q100 qualification are not required; verify layout compatibility with WSON-8 footprint |
| Cypress S25FL004K0XMFI010 | 4-Mbit Quad SPI (QSPI), 104 MHz, SOIC-8; supports SFDP but no OTP Security ID or write-suspend; different command set | Targeted at legacy QSPI host controllers lacking SQI support; requires firmware driver adaptation | Choose for migration from Cypress-based designs; confirm RESET#/HOLD# pin behavior matches host timing requirements |
Compared with SST26VF040AT-80E/SN, W25Q40EWUXIE offers higher clock speed but omits automotive qualification and security features, while S25FL004K0XMFI010 provides QSPI compatibility at the expense of SQI's multiplexed I/O efficiency and missing write-suspend - making SST26VF040AT-80E/SN optimal for new AEC-Q100 designs needing secure, interruptible firmware updates.
Availability
SST26VF040AT-80E/SN is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC firmware, and medical diagnostic device applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for SST26VF040AT-80E/SN 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 memory solutions, with global design and manufacturing infrastructure.
The SST26VF040AT-80E/SN belongs to Microchip's Serial Quad I/O™ Flash family, engineered for high-reliability embedded systems demanding fast, secure, and low-power nonvolatile storage in space-constrained automotive and industrial environments.
FAQ
What is the maximum operating frequency of the SST26VF040AT-80E/SN at extended temperature?
The SST26VF040AT-80E/SN supports up to 80 MHz maximum clock frequency across its extended temperature range of −40°C to +125°C. This rating is validated per Microchip's DS20006292A datasheet and applies to both SPI and SQI read operations under 2.3V–3.6V supply conditions. The 80 MHz limit ensures timing margin for reliable command execution in thermally stressed automotive environments.
Does the SST26VF040AT-80E/SN support true pin-compatible replacement for legacy SPI flash devices?
The SST26VF040AT-80E/SN is backward-compatible with standard SPI protocols (x1/x2 modes) and uses identical SOIC-8 and WDFN-8 footprints as many 25-series SPI flashes, but it is not a drop-in replacement due to differences in command set, STATUS register layout, and dual-mode pin functionality (e.g., RESET#/HOLD#/SIO3). Migration requires firmware validation of EQIO enable, hold/reset configuration, and block protection initialization sequences.
How is the OTP Security ID implemented in the SST26VF040AT-80E/SN?
The SST26VF040AT-80E/SN includes a 2-Kbyte OTP Security ID space comprising a factory-programmed 128-bit unique identifier (immutable) and a user-programmable area. Programming is performed via PSID command; locking is enforced by LSID command, which sets the SEC bit permanently. Once locked, no further writes to the Security ID space are possible - ensuring cryptographic binding of device identity to firmware or calibration data.
Can the SST26VF040AT-80E/SN operate in SQI mode immediately after power-up?
No - the SST26VF040AT-80E/SN powers up in SPI mode by default. To enter SQI mode, the host must first issue the EQIO command (0x38) and set the IOC bit in the Configuration register. The IOC bit must be '1' before executing SQI-specific instructions like SQOR (0x6B) or SQIOR (0xEB); failure to configure IOC results in invalid command responses. This ensures safe initialization for legacy SPI-only hosts.
What is the purpose of the HOLD# pin on the SST26VF040AT-80E/SN, and when is it active?
The HOLD# pin on the SST26VF040AT-80E/SN temporarily suspends ongoing SPI transactions without resetting internal state, allowing the host to service higher-priority interrupts. It is active only in SPI x1/x2 modes (not SQI), requires CE# low and SCK in active-low state for synchronization, and must be tied high when unused. Its function is disabled when IOC = 1, as SIO2/SIO3 pins are repurposed for quad I/O in SQI mode.
SST26VF040AT-80E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST26 SQI®
- 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 - Quad I/O
- Clock Frequency:
- 80 MHz
- Write Cycle Time - Word, Page:
- 1.5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST26VF040AT-80E/SN FAQ
1.How can I place an order for SST26VF040AT-80E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for SST26VF040AT-80E/SN 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-80E/SN reliable?
The price and inventory of SST26VF040AT-80E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST26VF040AT-80E/SN is usually 5 days.
3.What payment methods are accepted for SST26VF040AT-80E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST26VF040AT-80E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST26VF040AT-80E/SN?
SST26VF040AT-80E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST26VF040AT-80E/SN 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-80E/SN?
For technical support, including SST26VF040AT-80E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST26VF040AT-80E/SN requirements.
6.How does Aetrix verify that SST26VF040AT-80E/SN is sourced from the original manufacturer or authorized distributors?
All SST26VF040AT-80E/SN 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-80E/SN meets industry standards.
7.What is the process for return or replacement of SST26VF040AT-80E/SN?
All SST26VF040AT-80E/SN units undergo pre-shipment inspection (PSI). If there is an issue with SST26VF040AT-80E/SN, 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-80E/SN part is unused and in its original packaging.
Return procedure for SST26VF040AT-80E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST26VF040AT-80E/SN 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…
