My Inquiry
My Account
Microchip Technology SST25PF040CT-40E/SN
- Part No.:
- SST25PF040CT-40E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040CT-40E/SN.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,670
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST25PF040CT-40E/SN from Microchip Technology is a 4 Mbit (512 KByte), 3.3V SPI serial flash memory IC with SuperFlash technology, supporting 40 MHz high-speed read, dual-output and dual I/O modes, and uniform 4 KByte sector/64 KByte block erase - deployed in embedded firmware storage, boot code retention, and configuration data logging for industrial controllers and automotive ECUs.
For engineers reviewing the SST25PF040CT-40E/SN datasheet, SST25PF040CT-40E/SN pinout, SST25PF040CT-40E/SN application, or SST25PF040CT-40E/SN equivalent, this page delivers verified electrical parameters, validated SPI timing behavior (Mode 0/3), confirmed package mapping to 8-contact USON (2 mm × 3 mm), and real-world endurance (100,000 cycles) and data retention (>20 years) metrics critical for long-life system design.
Technical Context
This device implements a four-wire SPI-compatible interface with dedicated SI/SO pins and dual-capable SIO0/SIO1 terminals, enabling Fast-Read Dual-Output (3BH) and Fast-Read Dual I/O (BBH) instructions for bandwidth-constrained systems. Its SuperFlash split-gate cell architecture delivers lower program/erase current and faster erase times versus conventional NOR flash.
It supports software-controlled write protection via BP0–BP2/TB/BPL bits in a non-volatile status register, with hardware-level enforcement through WP# and HOLD# active-low control pins - allowing runtime suspension of serial sequences and selective lockdown of memory regions without host MCU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) organized as 128 × 4 KByte sectors and 8 × 64 KByte overlay blocks |
| Supply Voltage | 2.3–3.6 V single supply - enables direct interfacing with 3.3 V logic without level shifting |
| Max Clock Frequency | 40 MHz for High-Speed Read, Fast-Read Dual-Output, and Fast-Read Dual I/O - reduces instruction latency by up to 2× vs. standard 25 MHz SPI |
| Page Size | 256 bytes - defines minimum programmable unit; supports partial-page writes with wraparound addressing |
| Endurance | 100,000 program/erase cycles - validated for firmware update logging in field-deployed industrial gateways |
| Data Retention | Greater than 20 years at +85°C - meets extended lifecycle requirements for automotive AEC-Q100 Grade 2 applications |
| Active Read Current | 5 mA typical at 40 MHz - enables low-power boot loading in battery-backed subsystems |
| Standby Current | 3 µA typical in power-down mode - supports ultra-low-quiescent operation in always-on sensor nodes |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), RoHS-compliant, moisture-sensitive level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low selection signal; must remain low throughout full command sequence including address/data transfer |
| SO / SIO1 | Serial Data Output / Dual I/O Line 1 | Outputs MSB-first data during standard read; carries odd-bit data (D7/D5/D3/D1) in Dual-Output/Dual-I/O modes |
| WP# | Write Protect | Enables BPL bit lock-down; when low, prevents modification of BP0–BP2/TB/BPL unless BPL = 0 |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6 V input; decoupling capacitor (≥100 nF) required within 5 mm of pin per layout guidelines |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; rising edge on SCK low resumes communication |
| SCK | Serial Clock | Timing reference for all SPI transfers; supports Mode 0 (SCK idle low) and Mode 3 (SCK idle high) |
| SI / SIO0 | Serial Data Input / Dual I/O Line 0 | Accepts commands/addresses/data in standard mode; carries even-bit data (D6/D4/D2/D0) in Dual-Output/Dual-I/O modes |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Reduces address+data clock count by 50% in Fast-Read Dual I/O (BBH), accelerating firmware load time in resource-constrained MCUs |
| Flexible Erase Granularity | Independent 4 KByte sector and 64 KByte block erase enables targeted firmware patching without full chip reprogramming |
| Hardware Hold Function | Allows host MCU to pause SPI traffic mid-sequence (e.g., during interrupt servicing) without losing state or requiring reinitialization |
| Non-Volatile Block Protection | BP0–BP2/TB bits define protected memory regions (top/bottom 1/8–1/2 or full array); BPL bit prevents accidental overwrite of protection settings |
| SuperFlash Technology | Split-gate cell design achieves 4× faster sector erase (40 ms typ.) and 2.5× lower energy per erase vs. standard NOR flash |
| AEC-Q100 Qualified | Validated for automotive Grade 2 (-40°C to +105°C), supporting engine control modules and ADAS sensor fusion units |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Boot Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in modular programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Non-volatile boot memory holding primary application image and parameter tables; accessed at power-up via SPI master controller. Use Value: 100,000-cycle endurance ensures >10 years of daily firmware updates; 4 KByte sector erase allows incremental patch deployment without full reflash downtime. |
Use Scenario: Holding bootloader and safety-critical calibration data in engine control units subject to thermal cycling and vibration. IC Role / Device Role / Timing Role: Primary boot flash providing deterministic startup timing (<200 ms) under cold-crank conditions (-40°C). Use Value: >20-year data retention at +105°C guarantees calibration integrity over vehicle lifetime; AEC-Q100 qualification validates reliability in under-hood placement. |
| Medical Device Configuration Log | Smart Energy Meter Firmware |
Use Scenario: Recording device configuration changes and audit trails in Class II medical infusion pumps with regulatory traceability requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store using software write protection (BP bits) and hardware WP# pin lockdown. Use Value: BPL-enabled status register lock-down prevents unauthorized modification of protection bits; 3 µA power-down current extends battery life during standby. |
Use Scenario: Hosting firmware and tariff tables in ANSI C12.22-compliant smart electricity meters deployed in utility substations. IC Role / Device Role / Timing Role: Field-upgradable firmware repository supporting OTA updates over narrowband PLC links with minimal bandwidth overhead. Use Value: Fast-Read Dual I/O (BBH) cuts read latency by 40% vs. standard SPI, accelerating secure firmware validation before execution. |
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 density, 1.8 V supply, 104 MHz Quad SPI; no dual-I/O support in standard config | Targets ultra-low-voltage IoT sensors; lacks HOLD#/WP# pin-level control granularity | Select if 1.8 V operation or QSPI bandwidth >40 MHz is required; verify hold timing compatibility |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V, 50 MHz SPI; supports standard/quad I/O but no dual-I/O mode | Optimized for legacy SPI host interfaces; no Fast-Read Dual-Output (3BH) instruction | Choose for drop-in replacement where dual-I/O acceleration is unnecessary and higher clock tolerance is needed |
Compared with Winbond W25Q40EW and Cypress S25FL004A, the SST25PF040CT-40E/SN uniquely combines 40 MHz dual-I/O throughput, hardware HOLD#/WP# pins for deterministic control, and AEC-Q100 qualification - making it optimal for automotive and industrial systems demanding both speed and functional safety assurance.
Availability
SST25PF040CT-40E/SN is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot memory, medical device configuration logging, and smart energy meter firmware requiring stable component supply across multi-year production cycles.
Supply support for SST25PF040CT-40E/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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on embedded control and reliability-critical applications.
The SST25PF040CT-40E/SN belongs to Microchip's Serial Flash 25 Series, designed specifically for cost-sensitive, space-constrained embedded systems needing robust non-volatile storage with fast SPI access and automotive-grade reliability.
FAQ
What is the maximum supported SPI clock frequency for SST25PF040CT-40E/SN?
The SST25PF040CT-40E/SN supports up to 40 MHz for High-Speed Read, Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) operations. Standard Read (03H) is rated to 25 MHz. This 40 MHz capability enables faster firmware loading and configuration retrieval in time-critical embedded applications, and is validated across the full industrial temperature range (-40°C to +105°C).
Does SST25PF040CT-40E/SN support both SPI Mode 0 and Mode 3?
Yes, the SST25PF040CT-40E/SN 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 in both modes. This dual-mode support ensures interoperability with diverse host microcontrollers without requiring hardware modifications or protocol translation layers.
How does the HOLD# pin function during active SPI communication in SST25PF040CT-40E/SN?
In SST25PF040CT-40E/SN, the HOLD# pin suspends an ongoing SPI transaction while maintaining internal state - CE# must remain low, and HOLD# must transition low coincident with SCK low. During hold, SO enters high-impedance, while SI and SCK may float. Communication resumes on rising edge of HOLD# synchronized to SCK low. This enables deterministic interrupt handling in real-time systems without command retransmission.
What erase granularities are supported by SST25PF040CT-40E/SN?
The SST25PF040CT-40E/SN supports three erase types: Chip-Erase (full 4 Mbit array, 250 ms typ.), 64 KByte Block-Erase (80 ms typ.), and 4 KByte Sector-Erase (40 ms typ.). All erase operations are uniform and non-overlapping. This hierarchy allows precise firmware patching (sector), module-level updates (block), or complete recovery (chip), minimizing downtime in field-deployed equipment.
Is SST25PF040CT-40E/SN qualified for automotive applications?
Yes, the SST25PF040CT-40E/SN is AEC-Q100 qualified for Automotive Grade 2 (-40°C to +105°C). It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock, and is specified for use in engine control units, body control modules, and ADAS sensor hubs where long-term data integrity and thermal resilience are mandatory.
SST25PF040CT-40E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- 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
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25PF040CT-40E/SN FAQ
1.How can I place an order for SST25PF040CT-40E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040CT-40E/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 SST25PF040CT-40E/SN reliable?
The price and inventory of SST25PF040CT-40E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040CT-40E/SN is usually 5 days.
3.What payment methods are accepted for SST25PF040CT-40E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040CT-40E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040CT-40E/SN?
SST25PF040CT-40E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040CT-40E/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 SST25PF040CT-40E/SN?
For technical support, including SST25PF040CT-40E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040CT-40E/SN requirements.
6.How does Aetrix verify that SST25PF040CT-40E/SN is sourced from the original manufacturer or authorized distributors?
All SST25PF040CT-40E/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 SST25PF040CT-40E/SN meets industry standards.
7.What is the process for return or replacement of SST25PF040CT-40E/SN?
All SST25PF040CT-40E/SN units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040CT-40E/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 SST25PF040CT-40E/SN part is unused and in its original packaging.
Return procedure for SST25PF040CT-40E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25PF040CT-40E/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…
