My Inquiry
My Account
Microchip Technology SST25WF020-40-5I-QAE-T
- Part No.:
- SST25WF020-40-5I-QAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25WF020-40-5I-QAE-T.pdf
- Description:
- IC FLASH 2MBIT SPI 40MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,058
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST25WF020-40-5I-QAE-T from Microchip Technology is a 2 Mbit (256 KByte), 1.8V SPI serial flash memory IC with 40 MHz read speed, uniform 4 KByte sector erase, and Auto Address Increment (AAI) programming. It operates across industrial temperature (-40°C to +85°C), supports SPI Modes 0/3, and uses SuperFlash technology for enhanced reliability in embedded firmware storage applications.
For engineers reviewing the SST25WF020-40-5I-QAE-T datasheet, SST25WF020-40-5I-QAE-T pinout, SST25WF020-40-5I-QAE-T application, or SST25WF020-40-5I-QAE-T equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed industrial-grade operation, and two technically documented alternative parts for firmware storage designs requiring low-voltage, high-reliability serial flash.
Technical Context
The SST25WF020-40-5I-QAE-T implements a four-wire SPI interface with CE#, SCK, SI, and SO lines, supporting both Mode 0 (SCK idle low) and Mode 3 (SCK idle high). Its SuperFlash split-gate cell architecture enables 100,000 program/erase cycles and >100 years data retention at 85°C.
It features dual-function RST#/HOLD# pin (hardware reset default, configurable hold mode), dedicated WP# for status register lock-down, and software-controlled block protection (BP2–BP0) covering full, half, quarter, or eighth memory regions. End-of-write detection is supported via BUSY bit polling or SO pin RY/BY# output in AAI mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256 KByte) - fixed capacity for firmware image storage in resource-constrained microcontrollers |
| Supply Voltage | 1.65–1.95 V - single-supply operation compatible with 1.8V I/O domains and low-power SoCs |
| Max Clock Frequency | 40 MHz - enables high-speed firmware reads (e.g., XIP boot code fetch) with minimal latency |
| Erase Granularity | Uniform 4 KByte sectors + 32 KByte blocks - allows precise firmware partitioning without over-erasing |
| Program Time | 50 µs per byte (typical) - reduces firmware update duration in field-programmable devices |
| Data Retention | >100 years at +85°C - ensures long-term integrity of calibration data and secure boot keys |
| Endurance | 100,000 program/erase cycles - supports frequent OTA updates in industrial gateways and edge nodes |
Pinout & Package
Package: 8-contact WSON (5 mm × 6 mm, 0.5 mm pitch), RoHS-compliant, industrial temperature grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command execution to prevent premature termination |
| SCK | Serial Clock | Timing reference for SPI transfers; rising edge latches input (SI), falling edge outputs data (SO) |
| SI | Serial Data Input | Receives opcodes, addresses, and write data; MSB-first, synchronous to SCK rising edge |
| SO | Serial Data Output | Outputs read data or status; functions as RY/BY# busy indicator during AAI programming when configured |
| WP# | Write Protect | Enables BPL bit lock-down; when low, prevents modification of BP2–BP0 unless BPL = 0 |
| RST#/HOLD# | Reset / Hold Control | Default hardware reset (RST#); configurable to suspend SPI sequences without deselecting device |
| VDD | Power Supply | 1.65–1.95 V supply; decoupling capacitor required near pin for stable read/write margins |
| VSS | Ground | Reference return path; must be low-impedance connection to minimize noise on SO/SI signals |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector - delivers 100K endurance and >100-year retention without external ECC |
| Auto Address Increment (AAI) | Reduces multi-byte programming time by eliminating address retransmission - critical for fast firmware patching |
| Flexible Block Protection | Software-configurable BP2–BP0 bits protect full/half/quarter/eighth memory - isolates bootloader from application corruption |
| Low-Power Operation | 2 µA standby current - extends battery life in always-on IoT sensors and wearable firmware storage |
| Hardware Reset & Hold Modes | Single-pin dual function - simplifies PCB routing while enabling safe SPI suspension during interrupt handling |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Non-volatile firmware storage with guaranteed 100K endurance and >100-year data retention at 85°C ambient. Use Value: Eliminates need for external error correction or refresh logic due to SuperFlash intrinsic reliability under thermal stress. |
Use Scenario: Holding certified bootloader code and calibration data in Class II medical instruments requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: Secure, write-protected storage with hardware-enabled BP2–BP0 lockdown and WP#-controlled BPL bit. Use Value: Enables regulatory compliance via deterministic block protection that prevents accidental overwrite of safety-critical code regions. |
| Automotive Telematics Module | Smart Energy Meter Firmware |
Use Scenario: Hosting OTA-updatable firmware in vehicle telematics units exposed to wide temperature swings and vibration. IC Role / Device Role / Timing Role: 40 MHz high-speed read capability supports fast boot times; 1.65–1.95 V operation matches automotive 1.8V domain supplies. Use Value: Reduces boot latency by 2× vs. 20 MHz alternatives, improving system responsiveness after ignition cycle. |
Use Scenario: Storing metering firmware and tariff tables in utility-grade smart meters deployed in uncontrolled outdoor enclosures. IC Role / Device Role / Timing Role: Industrial-grade (-40°C to +85°C) operation with 4 KByte sector erase enables field-upgradable tariff schedules without full chip reprogramming. Use Value: Minimizes field service time by allowing targeted sector updates instead of complete firmware reloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25SF021-SSHD-B | 2 Mbit, 1.7–2.0 V supply, 104 MHz max clock, Quad SPI support, no HOLD# pin | Higher bandwidth but lacks hardware hold functionality; requires different SPI driver stack | Select for systems needing faster read throughput and quad I/O, where hold-mode suspension is not required |
| W25Q20EWUXIE | 2 Mbit, 1.65–1.95 V, 133 MHz max clock, Quad/Dual SPI, no RST#/HOLD# pin, different block protection scheme | Supports QPI/DTR modes but omits reset/hold pin and uses different BP bit mapping | Choose when migrating to Winbond's unified command set and higher-speed interfaces; verify bootloader compatibility |
Compared with AT25SF021-SSHD-B and W25Q20EWUXIE, the SST25WF020-40-5I-QAE-T provides unique hardware hold capability and RST#/HOLD# pin flexibility for real-time SPI suspension-critical in interrupt-driven embedded systems-while maintaining identical voltage range and industrial temperature rating.
Availability
SST25WF020-40-5I-QAE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, automotive telematics modules, smart energy meter firmware, and embedded IoT edge node updates requiring stable component supply across extended lifecycle planning.
Supply support for SST25WF020-40-5I-QAE-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with strong focus on industrial, automotive, and aerospace reliability standards.
The SST25WF020-40-5I-QAE-T belongs to Microchip's Serial Flash 25 Series, designed specifically for low-voltage, high-reliability firmware and configuration storage in space- and power-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by SST25WF020-40-5I-QAE-T?
The SST25WF020-40-5I-QAE-T supports up to 40 MHz for High-Speed Read operations using the 0BH opcode and dummy byte. Standard Read (03H) is rated to 20 MHz. This 40 MHz capability enables faster firmware loading in boot-critical applications, and the timing is validated across the full industrial temperature range (-40°C to +85°C).
Does SST25WF020-40-5I-QAE-T support both SPI Mode 0 and Mode 3?
Yes, the SST25WF020-40-5I-QAE-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 of SCK and drives SO on the falling edge in both modes. This dual-mode support ensures interoperability with diverse host controllers without hardware redesign.
How does the RST#/HOLD# pin function on SST25WF020-40-5I-QAE-T?
At power-on, the RST#/HOLD# pin defaults to hardware reset (RST#) functionality. It can be reconfigured to HOLD# mode via the Enable-Hold (AAH) instruction. In HOLD# mode, active-low assertion pauses ongoing SPI sequences without deselecting the device-ideal for interrupt servicing. A power cycle restores RST# default behavior.
What erase block sizes are available on SST25WF020-40-5I-QAE-T?
The SST25WF020-40-5I-QAE-T supports uniform 4 KByte sectors and 32 KByte overlay blocks. Unlike the 4 Mbit variant, it does not support 64 KByte blocks. Sector-erase (20H) and block-erase (52H) commands are both supported, enabling granular firmware updates while minimizing wear on adjacent memory regions.
Is SST25WF020-40-5I-QAE-T still in production or EOL?
The SST25WF020-40-5I-QAE-T is an obsolete (EOL) device per Microchip's DS20005016C datasheet revision 11/14. However, Aetrix Electronics maintains active inventory and offers lifecycle coordination support-including last-time-buy planning and qualified drop-in alternatives-to ensure continuity for legacy designs still in production.
SST25WF020-40-5I-QAE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- 60µs
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON
SST25WF020-40-5I-QAE-T FAQ
1.How can I place an order for SST25WF020-40-5I-QAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25WF020-40-5I-QAE-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 SST25WF020-40-5I-QAE-T reliable?
The price and inventory of SST25WF020-40-5I-QAE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25WF020-40-5I-QAE-T is usually 5 days.
3.What payment methods are accepted for SST25WF020-40-5I-QAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25WF020-40-5I-QAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25WF020-40-5I-QAE-T?
SST25WF020-40-5I-QAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25WF020-40-5I-QAE-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 SST25WF020-40-5I-QAE-T?
For technical support, including SST25WF020-40-5I-QAE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25WF020-40-5I-QAE-T requirements.
6.How does Aetrix verify that SST25WF020-40-5I-QAE-T is sourced from the original manufacturer or authorized distributors?
All SST25WF020-40-5I-QAE-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 SST25WF020-40-5I-QAE-T meets industry standards.
7.What is the process for return or replacement of SST25WF020-40-5I-QAE-T?
All SST25WF020-40-5I-QAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25WF020-40-5I-QAE-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 SST25WF020-40-5I-QAE-T part is unused and in its original packaging.
Return procedure for SST25WF020-40-5I-QAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25WF020-40-5I-QAE-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…
