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Renesas AT25DF021A-MHN-Y
- Part No.:
- AT25DF021A-MHN-Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25DF021A-MHN-Y.pdf
- Description:
- IC FLASH 2MBIT SPI 104MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,654
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Product details
Overview
AT25DF021A-MHN-Y from Renesas Electronics is a 2-Mbit serial SPI Flash memory IC designed for code shadowing and embedded data storage in consumer electronics. It operates from 1.65 V to 3.6 V across –40°C to +85°C, supports Dual-I/O read mode at up to 104 MHz, delivers 6 ns clock-to-output timing, and features flexible erase granularity (256-byte page, 4/32/64-kByte blocks).
For engineers reviewing the AT25DF021A-MHN-Y datasheet, AT25DF021A-MHN-Y pinout, AT25DF021A-MHN-Y application, or AT25DF021A-MHN-Y equivalent, key selection criteria include SPI Mode 0/3 compatibility, hardware write protection via WP pin, OTP security register programmability, ultra-low deep power-down current (200 nA), and industrial-temperature-grade reliability.
Technical Context
The AT25DF021A-MHN-Y implements a standard SPI interface with dual I/O capability for accelerated read throughput, using SCK rising edge for input latching and falling edge for output clocking. Its memory architecture supports byte/page programming and four distinct erase granularities-page (256 B), 4-kB block, 32-kB block, and full chip-enabling efficient co-location of code and data without cross-contamination.
Protection is enforced via both software commands and hardware control through the WP pin, while sector locking states are managed by a dedicated status register. The device integrates a 128-byte OTP security register (64 bytes factory-unique, 64 bytes user-programmable) and supports active status interrupt reporting for asynchronous operation monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256 KByte) serial Flash array optimized for mixed code+data storage |
| Supply Voltage | 1.65 V–3.6 V single supply; enables direct interfacing with 1.8 V and 3.3 V microcontrollers |
| Max Clock Frequency | 104 MHz for Dual-Output Read; doubles effective data rate vs standard SPI reads |
| Read Latency | 6 ns clock-to-output (tV); critical for low-latency boot code execution |
| Erase Granularity | 256-byte page, 4-kB/32-kB/64-kB uniform blocks; minimizes wasted space in firmware updates |
| Power Consumption | 200 nA ultra-deep power-down current; extends battery life in always-on IoT endpoints |
| Endurance & Retention | 100,000 program/erase cycles and 20-year data retention at –40°C to +85°C |
Pinout & Package
AT25DF021A-MHN-Y is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint and pinout. This package supports reflow soldering and is compatible with automated PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate command sequence |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI, falling edge clocks SO |
| SI (I/O0) | Serial Input / Dual-I/O Data Line 0 | Command/address/data input; becomes I/O0 during Dual-I/O read for parallel bit streaming |
| SO (I/O1) | Serial Output / Dual-I/O Data Line 1 | Data output line; remains active as I/O1 in Dual-I/O mode for simultaneous 2-bit reads |
| WP | Write Protect | Hardware lock control; low assertion disables write/erase commands to protected sectors |
| HOLD | Communication Hold | Pauses ongoing SPI transfer without deselecting device; requires CS low and SCK low to activate |
| VCC | Power Supply | 1.65–3.6 V input; powers all internal logic and memory array |
| GND | Ground Reference | System ground return path; required for stable voltage reference and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Delivers 2× data throughput vs standard SPI by clocking two bits per SCK falling edge |
| Flexible Erase Architecture | Enables independent update of firmware modules and configuration data without erasing adjacent regions |
| Hardware Write Protection | WP pin provides tamper-resistant sector locking independent of software state |
| OTP Security Register | 128-byte field with factory-unique 64-byte ID and user-programmable 64-byte space for secure keys or ESN |
| Ultra-Low Power Modes | 200 nA ultra-deep power-down current allows multi-year battery operation in sensor nodes |
Applications
| Smart Home Controller Firmware Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing boot firmware and OTA update images in battery-powered smart thermostats and lighting hubs. IC Role / Device Role / Timing Role: Non-volatile code storage with fast Dual-I/O read enabling sub-100 ms application startup. Use Value: 6 ns tV latency and 104 MHz clock support reduce boot time; 256-byte page erase permits atomic firmware patching. | Use Scenario: Retaining calibrated sensor parameters and runtime configuration in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Industrial-grade data logging and parameter backup memory with hardware write protection. Use Value: WP pin prevents accidental overwrites during field maintenance; 100K-cycle endurance ensures 10+ years of daily calibration saves. |
| Wearable Health Monitor Data Logger | Automotive Infotainment Boot Loader |
Use Scenario: Capturing heart-rate and motion sensor history in compact, coin-cell-powered wearables. IC Role / Device Role / Timing Role: Low-power persistent data buffer supporting intermittent writes and long-term retention. Use Value: 200 nA ultra-deep power-down current extends battery life beyond 12 months; 20-year data retention guarantees clinical record integrity. | Use Scenario: Hosting secure boot loader and cryptographic keys in automotive head units requiring ASIL-B alignment. IC Role / Device Role / Timing Role: Trusted execution environment (TEE) companion memory with OTP-based key storage. Use Value: Factory-programmed unique ID enables device authentication; OTP register prevents key extraction post-deployment. |
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 W25Q20EW | 2 Mbit density, 1.7–3.6 V supply, 133 MHz max clock, no OTP register, different status register map | Lacks factory-unique ID and user-programmable OTP; uses Quad-I/O instead of Dual-I/O | Select when higher clock speed and Quad-I/O bandwidth are prioritized over hardware-secured key storage |
| Micron MT25QL02G | 2 Gbit density (1000× larger), 1.7–2.0 V or 2.7–3.6 V dual supply options, Quad-SPI only, no 256-byte page erase | Not drop-in compatible due to density, voltage, and erase granularity mismatch; suited for high-capacity boot storage | Choose only for new designs requiring >1 Mbyte capacity and Quad-SPI ecosystem integration |
Compared with W25Q20EW and MT25QL02G, the AT25DF021A-MHN-Y uniquely balances fine-grained 256-byte erasure, integrated OTP security, and ultra-low 200 nA deep-sleep current-making it optimal for resource-constrained, security-aware embedded systems where code size and power budget are tightly constrained.
Availability
AT25DF021A-MHN-Y is available at Aetrix Electronics and suitable for smart home controllers, industrial PLCs, wearable health monitors, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25DF021A-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
Renesas Electronics is a global semiconductor leader delivering trusted microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT applications.
The AT25DF021A-MHN-Y belongs to Renesas' serial Flash memory product line, engineered specifically for cost-sensitive, low-power embedded systems needing reliable code storage, flexible data logging, and hardware-enforced security features.
FAQ
What is the operating temperature range supported by the AT25DF021A-MHN-Y?
The AT25DF021A-MHN-Y is rated for the full industrial temperature range of –40°C to +85°C. It also supports extended operation up to +125°C with derated endurance (20,000 cycles) and adjusted voltage limits (1.7–3.6 V). This makes the AT25DF021A-MHN-Y suitable for deployment in harsh environments such as factory automation and under-hood automotive modules where thermal stability is critical.
Does the AT25DF021A-MHN-Y support Quad-I/O or only Dual-I/O?
The AT25DF021A-MHN-Y supports SPI Modes 0 and 3 and Dual-I/O operation (using SI and SO as I/O0 and I/O1), but does not support Quad-I/O. Its Dual-I/O mode enables two bits per clock cycle during read operations, doubling throughput versus standard single-I/O SPI. Quad-I/O functionality is absent in the AT25DF021A-MHN-Y's command set and pin mapping per the official Renesas datasheet DS-AT25DF021A-042.
How is hardware write protection implemented on the AT25DF021A-MHN-Y?
Hardware write protection on the AT25DF021A-MHN-Y is controlled via the dedicated WP (Write Protect) pin, which is active-low. When asserted (pulled low), the WP pin locks protected sectors regardless of software command state-preventing accidental or malicious program/erase operations. The WP pin is internally pulled-high, so it may be left floating if unused, though Renesas recommends tying it to VCC for noise immunity. This complements software-based protection commands for defense-in-depth security.
What is the purpose and structure of the OTP security register in the AT25DF021A-MHN-Y?
The AT25DF021A-MHN-Y includes a 128-byte One-Time Programmable (OTP) security register: 64 bytes are factory-programmed with a unique identifier for device serialization, and 64 bytes are user-programmable for keys, certificates, or system-specific data. Once written, OTP locations cannot be erased or rewritten. This register supports secure boot, anti-counterfeiting, and electronic serial number (ESN) storage-critical for regulated or high-value embedded deployments where identity assurance is mandatory.
Can the AT25DF021A-MHN-Y be used in battery-powered applications with multi-year runtime requirements?
Yes-the AT25DF021A-MHN-Y is explicitly designed for ultra-low-power operation, drawing only 200 nA in Ultra Deep Power-Down mode (typical) and 4.5 µA in Deep Power-Down mode. Combined with 20-year data retention and 100,000 program/erase cycles, this enables decade-scale deployment in coin-cell or energy-harvesting systems like wireless sensors and medical wearables. Its 1.65 V minimum supply also supports direct integration with aging batteries down to ~1.7 V.
AT25DF021A-MHN-Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tray
- 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:
- 104 MHz
- Write Cycle Time - Word, Page:
- 8µs, 2.5ms
- Access Time:
- -
- 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)
AT25DF021A-MHN-Y FAQ
1.How can I place an order for AT25DF021A-MHN-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF021A-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 AT25DF021A-MHN-Y reliable?
The price and inventory of AT25DF021A-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 AT25DF021A-MHN-Y is usually 5 days.
3.What payment methods are accepted for AT25DF021A-MHN-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF021A-MHN-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF021A-MHN-Y?
AT25DF021A-MHN-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF021A-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 AT25DF021A-MHN-Y?
For technical support, including AT25DF021A-MHN-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF021A-MHN-Y requirements.
6.How does Aetrix verify that AT25DF021A-MHN-Y is sourced from the original manufacturer or authorized distributors?
All AT25DF021A-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 AT25DF021A-MHN-Y meets industry standards.
7.What is the process for return or replacement of AT25DF021A-MHN-Y?
All AT25DF021A-MHN-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF021A-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 AT25DF021A-MHN-Y part is unused and in its original packaging.
Return procedure for AT25DF021A-MHN-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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