My Inquiry
My Account
Microchip Technology SST25WF020A-40I/MF
- Part No.:
- SST25WF020A-40I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25WF020A-40I/MF.pdf
- Description:
- IC FLASH 2MBIT SPI 40MHZ 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,107
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST25WF020A-40I/MF from Microchip Technology is a 2 Mbit (256 KByte), 1.8V SPI Serial Flash memory IC with single-supply operation (1.65–1.95 V), 40 MHz high-speed read capability, and industrial temperature range (−40°C to +85°C). It features uniform 4 KByte sectors and 64 KByte overlay blocks, 256-byte page programming, and hardware/software write protection - deployed in embedded firmware storage for microcontrollers in industrial control and IoT edge nodes.
For engineers reviewing the SST25WF020A-40I/MF datasheet, SST25WF020A-40I/MF pinout, SST25WF020A-40I/MF application, or SST25WF020A-40I/MF equivalent, key selection criteria include its 1.65–1.95 V supply compatibility, SPI Mode 0/3 support, 4 µA power-down current, sector/block erase granularity, and WDFN-8 (5 mm × 6 mm) package with validated pin assignments for CE#, SO, WP#, VSS, VDD, HOLD#, SCK, and SI.
Technical Context
The SST25WF020A-40I/MF implements a four-wire SPI interface compliant with Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), supporting both standard Read (03H, up to 25 MHz) and High-Speed Read (0BH, up to 40 MHz with dummy cycle). Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve superior endurance and data retention.
Internal architecture includes dedicated I/O buffers, address latches, X/Y decoders, and control logic managing status register polling (BUSY bit), Write-Enable-Latch (WEL), and block-protection bits (BP0/BP1/TB/BPL). Hardware HOLD# and WP# pins enable suspend-on-demand and lock-down write protection independent of software commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256 KByte), organized as 64 × 4 KByte sectors and 4 × 64 KByte overlay blocks - enables fine-grained firmware updates without full chip erase. |
| Supply Voltage | 1.65–1.95 V - compatible with modern low-voltage MCU I/O domains and eliminates need for level shifters. |
| Max Clock Frequency | 40 MHz (High-Speed Read mode) - reduces boot/firmware load time by ~60% vs. 25 MHz standard read. |
| Endurance & Retention | 100,000 program/erase cycles; >20 years data retention - suitable for field-upgradable systems with infrequent but critical writes. |
| Power Consumption | 4 mA active read (typ), 10 µA standby (typ), 4 µA deep power-down (typ) - extends battery life in always-on sensor nodes. |
| Erase/Program Times | Sector-erase: 40 ms (typ); Block-erase: 80 ms (typ); Page-program: 3 ms / 256 bytes (typ) - supports deterministic update latency budgets. |
| Operating Temperature | −40°C to +85°C (industrial grade) - validated for deployment in uncontrolled ambient environments including factory floors and outdoor gateways. |
Pinout & Package
Package: 8-contact WDFN (5 mm × 6 mm), RoHS-compliant, moisture sensitivity level (MSL) 3 per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low during full command sequence; high state places device in standby mode. |
| SO | Serial Data Output | Tri-state output; data shifted out on falling edge of SCK; high-impedance during HOLD# activation. |
| WP# | Write Protect | Hardware enable/disable of status register lock-down (BPL bit); low = BPL functional, high = BPL disabled. |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-inductance connection to PCB ground plane. |
| VDD | Power Supply | 1.65–1.95 V supply input; bypass capacitor (≥1 µF ceramic) required within 5 mm of pin for stable read/write operation. |
| HOLD# | Hold Control | Pauses ongoing SPI transaction without deselecting device; valid only when CE# is low and SCK is low at transition. |
| SCK | Serial Clock | Input timing reference; rising edge samples SI, falling edge outputs SO; supports idle-low (Mode 0) or idle-high (Mode 3). |
| SI | Serial Data Input | Command/address/data input; sampled on rising edge of SCK; must meet setup/hold timing relative to SCK. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell + thick-oxide tunneling injector delivers 100K-cycle endurance and >20-year retention without charge-pump complexity. |
| Flexible Erase Granularity | Independent 4 KByte sector and 64 KByte block erase - allows partial firmware image updates while preserving configuration or calibration data. |
| Hardware HOLD# Pin | Enables real-time SPI transaction suspension (e.g., during interrupt servicing) without bus reinitialization or command restart. |
| Dual Write-Protection | Combines hardware WP# pin control with software-configurable BP0/BP1/TB/BPL bits - prevents accidental overwrite during power transitions or firmware bugs. |
| Deep Power-Down Mode | 4 µA standby current with ABH release command - ideal for battery-powered devices requiring sub-µA sleep states between wake events. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Boot Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile boot code and application image storage; accessed via SPI during cold start and field OTA updates. Use Value: 100,000-cycle endurance ensures 10+ years of reliable firmware revisions; −40°C to +85°C rating guarantees operation across industrial thermal profiles. |
Use Scenario: Hosting bootloader and sensor fusion firmware in battery-powered wireless gateways deployed outdoors or in remote infrastructure monitoring sites. IC Role / Device Role / Timing Role: Primary SPI flash for secure boot and encrypted firmware images; interfaces directly with ARM Cortex-M host MCU. Use Value: 4 µA deep power-down current extends multi-year battery life; 40 MHz read speed accelerates sensor initialization and telemetry transmission startup. |
| Medical Diagnostic Device Configuration | Automotive Body Control Module (BCM) Parameter Storage |
Use Scenario: Retaining calibration tables, user preferences, and regulatory audit logs in portable ultrasound or ECG units requiring long-term data integrity and traceability. IC Role / Device Role / Timing Role: Secure, write-protected parameter storage with tamper-evident block-lockdown via BPL bit. Use Value: Software + hardware write protection prevents unauthorized modification; >20-year data retention satisfies medical device archival requirements. |
Use Scenario: Storing vehicle-specific configuration data (e.g., door lock behavior, lighting profiles, seat position presets) in BCMs subject to automotive qualification standards. IC Role / Device Role / Timing Role: SPI-connected nonvolatile memory for EEPROM-like parameter persistence across ignition cycles. Use Value: Industrial temperature range covers under-hood thermal extremes; uniform 4 KByte sectors allow safe over-the-air parameter updates without corrupting adjacent settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI serial flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q20EW | 2 Mbit density, 1.7–1.95 V supply, 104 MHz Dual/Quad SPI; no HOLD# pin; different status register layout. | Requires Dual/Quad SPI controller support; lacks hardware hold function for interrupt-safe operation. | Select if higher throughput via Dual/Quad mode is needed and HOLD# is not required. |
| Cypress S25FL004A | 4 Mbit density, 2.7–3.6 V supply; 50 MHz max clock; legacy 3.3 V interface; different sector map (64 × 64 KByte). | Not voltage-compatible with 1.8 V systems; larger density increases cost and layout area unnecessarily. | Choose only for legacy 3.3 V designs where pinout compatibility with older Cypress footprints is mandatory. |
Compared with W25Q20EW and S25FL004A, the SST25WF020A-40I/MF uniquely balances ultra-low 1.8 V operation, hardware HOLD# support, and industrial temperature reliability - making it optimal for space-constrained, battery-aware, and interrupt-sensitive embedded systems where voltage compatibility and deterministic timing are critical.
Availability
SST25WF020A-40I/MF is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node boot memory, and medical diagnostic device configuration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SST25WF020A-40I/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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on embedded control and reliability-critical applications.
The SST25WF020A-40I/MF belongs to Microchip's Serial Flash 25 Series, designed specifically for low-voltage, high-reliability firmware and parameter storage in space- and power-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by SST25WF020A-40I/MF for read operations?
The SST25WF020A-40I/MF supports up to 40 MHz for High-Speed Read operations using the 0BH instruction with a dummy byte, and up to 25 MHz for standard Read (03H) mode. This 40 MHz capability is explicitly specified in the DS20005139F datasheet and validated for the SST25WF020A-40I/MF variant in WDFN-8 packaging.
Does SST25WF020A-40I/MF support both SPI Mode 0 and Mode 3?
Yes, the SST25WF020A-40I/MF is fully compatible with both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in Section 4.0 of the DS20005139F datasheet. The device samples SI on the rising edge and drives SO on the falling edge of SCK in both modes.
What package type is used for SST25WF020A-40I/MF?
The SST25WF020A-40I/MF uses an 8-contact WDFN package measuring 5 mm × 6 mm, as indicated by the "/MF" suffix in the part number and confirmed in Figure 2-1 and Table 2-1 of the DS20005139F datasheet. This package provides thermal and electrical performance advantages over SOIC and USON variants.
How does the HOLD# pin function on SST25WF020A-40I/MF?
The HOLD# pin on SST25WF020A-40I/MF suspends an ongoing SPI transaction without deselecting the device or resetting internal state - activated when CE# is low and HOLD# transitions low coincident with SCK low. During HOLD#, SO enters high-impedance while SI and SCK remain active, enabling deterministic interrupt handling.
What is the endurance rating and data retention specification for SST25WF020A-40I/MF?
The SST25WF020A-40I/MF is rated for 100,000 program/erase cycles and greater than 20 years of data retention at +85°C, as stated in the Features section of DS20005139F. These values are guaranteed across the full industrial temperature range (−40°C to +85°C) and apply to the WDFN-8 packaged variant.
SST25WF020A-40I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 3.5ms
- 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-WDFN (5x6)
SST25WF020A-40I/MF FAQ
1.How can I place an order for SST25WF020A-40I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25WF020A-40I/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 SST25WF020A-40I/MF reliable?
The price and inventory of SST25WF020A-40I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25WF020A-40I/MF is usually 5 days.
3.What payment methods are accepted for SST25WF020A-40I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25WF020A-40I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25WF020A-40I/MF?
SST25WF020A-40I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25WF020A-40I/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 SST25WF020A-40I/MF?
For technical support, including SST25WF020A-40I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25WF020A-40I/MF requirements.
6.How does Aetrix verify that SST25WF020A-40I/MF is sourced from the original manufacturer or authorized distributors?
All SST25WF020A-40I/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 SST25WF020A-40I/MF meets industry standards.
7.What is the process for return or replacement of SST25WF020A-40I/MF?
All SST25WF020A-40I/MF units undergo pre-shipment inspection (PSI). If there is an issue with SST25WF020A-40I/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 SST25WF020A-40I/MF part is unused and in its original packaging.
Return procedure for SST25WF020A-40I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25WF020A-40I/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…
