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Renesas AT25DF021A-MAHNHR-T
- Part No.:
- AT25DF021A-MAHNHR-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT25DF021A-MAHNHR-T.pdf
- Description:
- IC FLASH 2MBIT SPI 85MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,945
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Product details
Overview
AT25DF021A-MAHNHR-T from Renesas Electronics is a 2-Mbit serial SPI Flash memory IC supporting Dual-I/O operation, 104 MHz max clock frequency, 6 ns clock-to-output delay, and flexible erase architecture (256-byte page, 4/32/64-kByte blocks). It operates from 1.65 V to 3.6 V across –40°C to +85°C and is used for code shadowing and embedded data storage in resource-constrained IoT edge nodes.
For engineers reviewing the AT25DF021A-MAHNHR-T datasheet, AT25DF021A-MAHNHR-T pinout, AT25DF021A-MAHNHR-T application, or AT25DF021A-MAHNHR-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, hardware write protection via WP pin, OTP security register programmability, ultra-deep power-down current (200 nA), and industrial temperature support with green packaging.
Technical Context
The AT25DF021A-MAHNHR-T implements a dedicated SPI interface with dual-output read capability, enabling two bits per SCK falling edge to double effective throughput versus standard single-I/O reads. Its internal architecture includes SRAM data buffers, Y/X decoders, and control logic that manages autonomous program/erase cycles without host intervention.
It supports four distinct erase granularities-page (256 B), uniform 4-kB block, uniform 32-kB block, and uniform 64-kB block-enabling efficient co-location of firmware code and runtime data in separate, non-overlapping erase regions. Sector protection is enforced via both software commands and hardware WP pin assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 bytes) - sufficient for boot code, firmware images, and configuration data in compact embedded systems. |
| Interface | SPI-compatible, Modes 0 and 3 - ensures interoperability with standard microcontroller SPI peripherals without custom timing setup. |
| Max Clock Frequency | 104 MHz - enables high-speed sequential reads up to ~13 MB/s in Dual-Output mode, reducing boot latency. |
| Page Program Time | 1.25 ms typical (256 bytes) - allows rapid field updates of small firmware patches or parameter sets without long blocking delays. |
| Erase Granularity | 256-byte page, 4/32/64-kB blocks - minimizes wasted space when updating mixed code/data segments independently. |
| Power-Down Current | 200 nA ultra-deep power-down (typical) - extends battery life in always-on sensor nodes during extended sleep intervals. |
| Data Retention | 20 years - guarantees long-term reliability for firmware storage in unattended industrial deployments. |
| Endurance | 100,000 program/erase cycles (–40°C to +85°C) - supports frequent over-the-air (OTA) firmware updates in edge gateways. |
Pinout & Package
AT25DF021A-MAHNHR-T is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint. Pin functions are electrically defined and validated per Renesas DS-AT25DF021A-042 Rev. L.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high→low to initiate command, low→high to terminate; device enters standby (not deep power-down) when deasserted. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output; defines all timing windows for command/address/data transfer. |
| SI (I/O0) | Serial Input / Dual-I/O Data Line 0 | Primary command/address/data input; becomes bidirectional I/O0 during Dual-Output Read to deliver LSB of dual-bit data stream. |
| SO (I/O1) | Serial Output / Dual-I/O Data Line 1 | Primary data output; remains active I/O1 during Dual-Output Read to deliver MSB of dual-bit data stream on each SCK falling edge. |
| WP | Write Protect | Hardware lock control; low-asserted to freeze sector protection registers and prevent accidental writes/erases during power transients. |
| HOLD | Communication Hold | Pauses ongoing SPI transfers without deselecting device or resetting internal state; requires CS asserted and SCK low to activate. |
| VCC | Supply Voltage | Single 1.65–3.6 V rail powers all operations; no auxiliary voltage required for programming or erasing. |
| GND | Ground Reference | Common return path for VCC and all I/O signals; must be connected directly to system ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Support | Delivers 2-bit data per SCK falling edge, doubling effective read bandwidth vs. standard SPI and accelerating boot/code fetch. |
| Flexible Erase Architecture | Enables independent update of code modules and data logs using 256-byte pages or scalable block sizes-no need for external EEPROM. |
| 128-Byte OTP Security Register | Stores factory-programmed unique ID (64 B) and user-programmable keys (64 B), supporting secure device authentication and anti-cloning. |
| Hardware Write Protection | WP pin provides fail-safe locking of protected sectors during brown-out or firmware glitches, preventing corruption without software overhead. |
| Ultra-Deep Power-Down Mode | Reduces quiescent current to 200 nA typical, making it suitable for multi-year battery-powered sensors with infrequent wake-ups. |
| JEDEC Standard IDs | Supports standardized Manufacturer and Device ID read commands (90h/ABh), simplifying automated BOM verification and supply chain traceability. |
Applications
| Industrial PLC Firmware Storage | Smart Meter Boot Code |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access read and selective page reprogramming during field upgrades. Use Value: 104 MHz Dual-I/O read speed reduces boot time by >40% vs. legacy SPI Flash; 4-kB block erase enables atomic firmware patching without full chip reflash. |
Use Scenario: Holding certified metrology firmware and tamper-evident logs in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, long-retention storage for cryptographic keys and firmware signatures using OTP register and hardware WP lock. Use Value: 20-year data retention and 100K-cycle endurance ensure compliance over 15+ year meter lifetime; ultra-deep power-down extends battery backup duration. |
| Wireless Sensor Node Configuration | Medical Wearable Parameter Storage |
Use Scenario: Persisting network credentials, sensor calibration offsets, and OTA update staging buffers in BLE/Zigbee end nodes. IC Role / Device Role / Timing Role: Low-power, byte-addressable data logging with minimal footprint and no external voltage regulators. Use Value: 256-byte page erase granularity allows efficient storage of small, frequently updated parameters without erasing adjacent firmware sectors. |
Use Scenario: Storing FDA-regulated device settings, usage history, and firmware revision metadata in Class II wearable health monitors. IC Role / Device Role / Timing Role: Reliable, RoHS-compliant non-volatile memory meeting IEC 62304 safety requirements for medical software storage. Use Value: Industrial temperature range (–40°C to +85°C) and 20-year retention guarantee data integrity across clinical deployment lifecycles. |
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, 133 MHz max clock, but lacks Dual-I/O support and OTP register; uses different status register layout. | Lower read throughput in high-speed boot scenarios; no built-in secure serialization capability. | Select when maximum clock speed is prioritized over dual-data-line efficiency and security features. |
| Micron MT25QL02G | 2 Gbit density (1000× larger), Quad-SPI only, 133 MHz, supports XIP; incompatible pinout and command set. | Over-specified capacity and interface complexity for simple 2-Mbit code storage needs. | Choose only if future scalability to larger firmware or execute-in-place (XIP) capability is required. |
Compared with W25Q20EW and MT25QL02G, the AT25DF021A-MAHNHR-T delivers optimal balance of speed (104 MHz Dual-I/O), security (OTP register), and power efficiency (200 nA deep sleep) for cost-sensitive, space-constrained embedded designs requiring precise 2-Mbit allocation.
Availability
AT25DF021A-MAHNHR-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, smart meter boot code, and wireless sensor node configuration requiring stable component supply and long-term lifecycle support.
Supply support for AT25DF021A-MAHNHR-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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.
The AT25DF021A-MAHNHR-T belongs to Renesas' serial Flash memory product line, engineered specifically for high-reliability, low-voltage embedded systems needing efficient code shadowing and secure data logging in compact footprints.
FAQ
What is the operating voltage range of the AT25DF021A-MAHNHR-T?
The AT25DF021A-MAHNHR-T operates from 1.65 V to 3.6 V across the full industrial temperature range (–40°C to +85°C), with extended support down to 1.7 V at high-temperature operation (–40°C to +125°C). This single-supply design eliminates the need for auxiliary voltage rails during programming or erasing, simplifying power architecture in battery-powered devices.
Does the AT25DF021A-MAHNHR-T support Dual-I/O read mode, and how does it improve performance?
Yes, the AT25DF021A-MAHNHR-T supports Dual-Output Read mode using SI (I/O0) and SO (I/O1) pins, delivering two bits per SCK falling edge. This doubles effective read throughput versus standard SPI, achieving up to ~13 MB/s at 104 MHz-reducing boot time and firmware load latency in microcontroller-based systems.
How is hardware write protection implemented on the AT25DF021A-MAHNHR-T?
Hardware write protection on the AT25DF021A-MAHNHR-T is controlled by the WP (Write Protect) pin, which is active-low. When asserted low, it locks protected sectors regardless of software commands, preventing accidental or malicious modification during power-up transients or firmware faults-critical for certified industrial and medical firmware storage.
What security features does the AT25DF021A-MAHNHR-T provide?
The AT25DF021A-MAHNHR-T includes a 128-byte One-Time Programmable (OTP) Security Register: 64 bytes factory-programmed with a unique identifier and 64 bytes user-programmable for keys or certificates. This enables secure device serialization, ESN storage, and locked key management without external secure elements.
What erase options are available on the AT25DF021A-MAHNHR-T, and why does granularity matter?
The AT25DF021A-MAHNHR-T supports 256-byte page erase, plus uniform 4-kB, 32-kB, and 64-kB block erases. Fine-grained page erase avoids wasting space when updating small configuration parameters, while larger blocks optimize firmware patching-enabling efficient co-location of code and data in separate, non-overlapping erase regions.
AT25DF021A-MAHNHR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 85 MHz
- Write Cycle Time - Word, Page:
- 12µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT25DF021A-MAHNHR-T FAQ
1.How can I place an order for AT25DF021A-MAHNHR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF021A-MAHNHR-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 AT25DF021A-MAHNHR-T reliable?
The price and inventory of AT25DF021A-MAHNHR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25DF021A-MAHNHR-T is usually 5 days.
3.What payment methods are accepted for AT25DF021A-MAHNHR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF021A-MAHNHR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF021A-MAHNHR-T?
AT25DF021A-MAHNHR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF021A-MAHNHR-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 AT25DF021A-MAHNHR-T?
For technical support, including AT25DF021A-MAHNHR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF021A-MAHNHR-T requirements.
6.How does Aetrix verify that AT25DF021A-MAHNHR-T is sourced from the original manufacturer or authorized distributors?
All AT25DF021A-MAHNHR-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 AT25DF021A-MAHNHR-T meets industry standards.
7.What is the process for return or replacement of AT25DF021A-MAHNHR-T?
All AT25DF021A-MAHNHR-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF021A-MAHNHR-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 AT25DF021A-MAHNHR-T part is unused and in its original packaging.
Return procedure for AT25DF021A-MAHNHR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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