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Renesas AT25PE40-MHN-Y
- Part No.:
- AT25PE40-MHN-Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25PE40-MHN-Y.pdf
- Description:
- IC FLASH 4MBIT SPI 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,466
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Product details
Overview
AT25PE40-MHN-Y from Microchip Technology is a 4-Mbit serial Flash memory with DataFlash-L architecture, supporting SPI modes 0 and 3, RapidS™ high-speed interface up to 85 MHz, and dual 256/264-byte SRAM buffers for concurrent read/write operations. It operates from 1.65V–3.6V, features page/block/sector/chip erase, and targets embedded firmware storage, voice/image buffering, and code execution in space-constrained industrial systems.
For engineers reviewing the AT25PE40-MHN-Y datasheet, AT25PE40-MHN-Y pinout, AT25PE40-MHN-Y application, or AT25PE40-MHN-Y equivalent, key selection criteria include its 6ns clock-to-output time, 300nA ultra-deep power-down current, user-configurable 256/264-byte page size, dual-buffer interleaving capability, and JEDEC-standard manufacturer/device ID support.
Technical Context
The AT25PE40-MHN-Y implements a sequential-access Flash architecture with two independent 256/264-byte SRAM buffers enabling simultaneous data reception and main array reprogramming. Its RapidS™ interface supports four continuous read opcodes (01h, 03h, 0Bh, 1Bh) with distinct frequency limits (fCAR3 to fCAR4) and dummy byte requirements.
Memory organization comprises 2,048 pages of 256 or 264 bytes each, mapped across 8 sectors (7 × 64KB + 1 × 2KB), with flexible erase granularity down to page level (256/264 bytes). All program/erase cycles are self-timed, and hardware write protection via the WP pin operates independently of software sector protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (4-Mbit), organized as 2,048 pages × 256/264 bytes |
| Supply Voltage | 1.65V–3.6V single supply - enables direct interfacing with 1.8V/2.5V/3.3V logic without level shifters |
| Max Clock Frequency | 85 MHz (RapidS™ mode) - supports high-throughput streaming reads in real-time audio/video applications |
| Read Latency | 6 ns tV (clock-to-output) - minimizes wait states during instruction fetch or buffer access |
| Power Consumption | 300 nA ultra-deep power-down (typical) - extends battery life in always-on sensor nodes and portable devices |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-upgradable firmware storage |
| Page Size Config | User-selectable 256-byte (default) or 264-byte mode - accommodates ECC overhead or alignment-sensitive protocols |
Pinout & Package
AT25PE40-MHN-Y is packaged in an 8-pad Ultra-thin DFN (5 mm × 6 mm × 0.6 mm) with exposed thermal pad (non-connected). Pin functions are electrically identical to the SOIC variant but optimized for PCB area reduction and thermal performance in compact designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition and terminates operation on low-to-high transition |
| SO | Serial Output | Tri-state output; data clocked out on SCK falling edge; high-impedance when CS is deasserted |
| WP | Hardware Write Protect | Active-low; locks protected sectors regardless of software protection state; internally pulled-high |
| GND | Ground Reference | System ground connection; required for stable biasing and noise immunity |
| VCC | Power Supply | 1.65V–3.6V input; powers all internal logic, memory array, and I/O drivers |
| RESET | Hardware Reset | Active-low; aborts ongoing operation and resets internal state machine; recommended to tie high if unused |
| SCK | Serial Clock | Master-generated clock; commands/addresses latched on rising edge; SO data valid on falling edge |
| SI | Serial Input | Command, address, and data input; sampled on SCK rising edge; ignored when CS is deasserted |
Key Features
| Feature | Design Value |
|---|---|
| Dual Independent SRAM Buffers | Two 256/264-byte buffers enable true concurrent data ingestion and main memory reprogramming - eliminates write stalls in continuous data logging |
| RapidS™ High-Speed Read Modes | Four dedicated opcodes (01h/03h/0Bh/1Bh) with differentiated max frequencies (fCAR3 to fCAR4) and dummy byte counts - allows runtime optimization for power vs. throughput |
| Flexible Erase Granularity | Page (256/264B), block (2KB), sector (64KB), and chip-level erase - reduces wear on adjacent pages during partial firmware updates |
| Security Register | 128-byte factory-programmed unique identifier - enables secure device authentication and anti-cloning in OEM deployments |
| Ultra-Low Power States | 300 nA ultra-deep power-down and 5 µA deep power-down - meets stringent energy budgets for battery-powered IoT endpoints |
Applications
| Firmware Storage | Real-Time Audio Buffering |
|---|---|
|
Use Scenario: Storing and updating boot code, application firmware, and configuration parameters in industrial PLCs and medical devices. IC Role / Device Role / Timing Role: Non-volatile code storage with in-system reprogrammability; supports rapid page programming and sector-locked update zones. Use Value: 100,000-cycle endurance and 20-year retention ensure reliable field upgrades over product lifetime without requiring external EEPROM or backup power. |
Use Scenario: Capturing and streaming high-fidelity voice or sensor data in wearable health monitors and voice-controlled HMI systems. IC Role / Device Role / Timing Role: Dual-buffered sequential memory acting as ping-pong scratchpad - accepts incoming samples into one buffer while streaming previously captured data from the other. Use Value: Interleaved buffer usage enables uninterrupted 85 MHz read throughput, eliminating microcontroller DMA bottlenecks during continuous capture. |
| Embedded Code Execution (XIP) | Secure Device Identity Management |
|
Use Scenario: Executing firmware directly from Flash in resource-constrained microcontrollers lacking external memory interfaces. IC Role / Device Role / Timing Role: Low-latency serial Flash with 6 ns tV and continuous read wraparound - delivers deterministic instruction fetch timing across page boundaries. Use Value: Continuous Array Read (1Bh opcode) sustains >60 MB/s effective bandwidth at 85 MHz, matching Cortex-M4/M7 core fetch rates without cache misses. |
Use Scenario: Enabling cryptographic key binding and device-specific licensing in connected appliances and smart meters. IC Role / Device Role / Timing Role: Factory-programmed 128-byte security register providing immutable hardware identity - accessed via standard JEDEC ID read command. Use Value: Eliminates need for discrete secure elements; identity data is tamper-resistant and readable without special unlock sequences or voltage manipulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25SF041-MAHD-Y | 4-Mbit, same package, but SPI-only (no RapidS™), 104 MHz max clock, no dual buffers, 1.7–2.0V/2.7–3.6V dual supply | Lacks concurrent buffer operation and continuous read wraparound; suited for simpler code storage where throughput <60 MB/s suffices | Select when RapidS™ or dual-buffer streaming is unnecessary and wider voltage tolerance is required |
| W25Q40EWUXIE | 4-Mbit, DFN-8, 133 MHz Quad SPI, 4KB sector erase only (no page/block erase), no SRAM buffers, 1.7–2.0V/2.7–3.6V | Requires Quad I/O for full speed; lacks page-level erase flexibility and hardware WP pin independence from software protection | Choose for QSPI host compatibility and higher peak bandwidth, but avoid where fine-grained erase control or hardware write lock is mandatory |
Compared with AT25PE40-MHN-Y, AT25SF041-MAHD-Y trades dual-buffer concurrency and RapidS™ for broader voltage range and higher clock ceiling, while W25Q40EWUXIE sacrifices page/block erase and hardware WP independence for quad-interface bandwidth - making AT25PE40-MHN-Y uniquely suited for streaming-aware, power-sensitive, and security-critical embedded firmware storage.
Availability
AT25PE40-MHN-Y is available at Aetrix Electronics and suitable for industrial control firmware storage, portable medical device data logging, and automotive infotainment boot memory requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT25PE40-MHN-Y 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 components, Flash memory, and security solutions for industrial, automotive, and consumer markets.
The AT25PE40-MHN-Y belongs to Microchip's DataFlash-L® family, designed specifically for high-reliability, low-pin-count, sequential-access Flash applications demanding concurrent buffering, ultra-low power, and robust in-system programmability.
FAQ
What is the default page size configuration for AT25PE40-MHN-Y?
The AT25PE40-MHN-Y ships with 256-byte pages enabled by default. The 264-byte page option is customer-selectable via factory configuration - not user-programmable in-circuit. This setting determines address bit allocation (19-bit vs. 20-bit) and dummy byte count in read/program commands, and must be known during firmware driver development.
Does AT25PE40-MHN-Y support true concurrent read and write operations?
Yes. AT25PE40-MHN-Y uses two independent 256/264-byte SRAM buffers to enable true concurrency: one buffer can accept incoming data via Buffer Write while the other feeds data to the main memory array via Buffer-to-Main-Memory Page Program. This eliminates write stalls during continuous streaming, unlike conventional serial Flash.
What is the function of the RESET pin on AT25PE40-MHN-Y?
The RESET pin on AT25PE40-MHN-Y is an active-low hardware reset that immediately terminates any ongoing operation (read, program, or erase) and returns the internal state machine to idle. It is not required for power-on initialization due to an internal POR circuit, but must be externally held high if unused to prevent spurious resets.
How does the WP pin interact with software-based sector protection on AT25PE40-MHN-Y?
The WP pin on AT25PE40-MHN-Y provides hardware-level write protection that overrides all software protection mechanisms. When WP is asserted (low), protected sectors remain locked against program/erase regardless of Sector Protection Register contents or Enable Sector Protection command status - ensuring fail-safe lockdown in critical systems.
Is AT25PE40-MHN-Y compatible with standard SPI controllers?
Yes. AT25PE40-MHN-Y is fully SPI-compatible and supports standard modes 0 and 3. It requires only CS, SCK, SI, and SO signals - no additional control lines. All commands use standard 8-bit opcodes, and timing complies with SPI specifications, enabling drop-in integration with most MCU SPI peripherals without custom hardware.
AT25PE40-MHN-Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR (SLC)
- Memory Size:
- 4Mbit
- Memory Organization:
- 2M x 2
- Memory Interface:
- SPI
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 3ms
- Access Time:
- 6 ns
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (5x6)
AT25PE40-MHN-Y FAQ
1.How can I place an order for AT25PE40-MHN-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25PE40-MHN-Y 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 AT25PE40-MHN-Y reliable?
The price and inventory of AT25PE40-MHN-Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25PE40-MHN-Y is usually 5 days.
3.What payment methods are accepted for AT25PE40-MHN-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25PE40-MHN-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25PE40-MHN-Y?
AT25PE40-MHN-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25PE40-MHN-Y 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 AT25PE40-MHN-Y?
For technical support, including AT25PE40-MHN-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25PE40-MHN-Y requirements.
6.How does Aetrix verify that AT25PE40-MHN-Y is sourced from the original manufacturer or authorized distributors?
All AT25PE40-MHN-Y 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 AT25PE40-MHN-Y meets industry standards.
7.What is the process for return or replacement of AT25PE40-MHN-Y?
All AT25PE40-MHN-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT25PE40-MHN-Y, 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 AT25PE40-MHN-Y part is unused and in its original packaging.
Return procedure for AT25PE40-MHN-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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