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Renesas AT25DF021A-MHNHR-T
- Part No.:
- AT25DF021A-MHNHR-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25DF021A-MHNHR-T.pdf
- Description:
- IC FLASH 2MBIT SPI 85MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,686
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Product details
Overview
AT25DF021A-MHNHR-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) for embedded code and data storage in industrial and consumer systems.
For engineers reviewing the AT25DF021A-MHNHR-T datasheet, AT25DF021A-MHNHR-T pinout, AT25DF021A-MHNHR-T application, or AT25DF021A-MHNHR-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, ultra-low deep power-down current (200 nA), OTP security register (128 bytes), hardware write protection via WP pin, and industrial temperature support (–40°C to +125°C).
Technical Context
The AT25DF021A-MHNHR-T implements a standard SPI interface with dual-output read capability, enabling two bits per SCK falling edge to double effective throughput versus single-I/O mode. Its memory array is organized into uniform sectors and blocks optimized for mixed code+data firmware deployments.
Internal control logic supports hardware-locked sector protection via the WP pin and software-controlled status register configuration, while the dedicated OTP security register provides factory-programmed unique ID (64 bytes) and user-programmable space (64 bytes) for device serialization or secure key storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 2 Mbit (256 KBytes) - sufficient for boot code, firmware images, and configuration data in resource-constrained microcontrollers. |
| Supply voltage | 1.65 V – 3.6 V (–40°C to +85°C); 1.7 V – 3.6 V (–40°C to +125°C) - enables direct interfacing with 1.8 V and 3.3 V logic without level shifters. |
| Max clock frequency | 104 MHz - delivers up to 104 MB/s raw read bandwidth in Dual-Output mode, reducing firmware load latency. |
| Page program time | 1.25 ms typical (256 bytes) - enables fast field updates and logging without blocking system execution for extended periods. |
| Block erase time | 40 ms (4 kByte), 250 ms (32 kByte), 500 ms (64 kByte) - balances granularity and speed for partial firmware patching and data table maintenance. |
| Power consumption | 200 nA ultra-deep power-down current - extends battery life in always-on IoT edge nodes during sleep cycles. |
| Data retention | 20 years - ensures long-term reliability for automotive ECUs, medical devices, and industrial controllers without refresh. |
| Endurance | 100,000 P/E cycles (–40°C to +85°C); 20,000 P/E cycles (–40°C to +125°C) - supports frequent over-the-air (OTA) updates in harsh thermal environments. |
Pinout & Package
AT25DF021A-MHNHR-T is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint, compatible with automated PCB assembly and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition low to initiate any command and high to terminate - controls device selection and SO high-impedance state. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output - defines timing for all SPI transactions. |
| SI (I/O0) | Serial Input / Dual-I/O Data 0 | Command/address/data input in standard mode; becomes bidirectional I/O0 in Dual-I/O reads - enables 2-bit parallel data transfer on falling SCK edges. |
| SO (I/O1) | Serial Output / Dual-I/O Data 1 | Data output in standard mode; remains I/O1 in Dual-I/O reads - pairs with SI/I/O0 to deliver dual-bit data stream. |
| WP | Write Protect | Hardware lock control; low assertion prevents status register writes and sector protection changes - provides tamper-resistant firmware integrity. |
| HOLD | Hold | Pauses ongoing SPI communication without deselecting device; requires CS low and SCK low to activate - preserves transaction state during interrupt servicing. |
| VCC | Power Supply | Single 1.65–3.6 V supply powers all internal logic and memory array - eliminates need for auxiliary voltage rails. |
| GND | Ground | Reference return path for VCC and all I/O signals - must be low-impedance connection to minimize noise coupling into sensitive flash operations. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Support | Enables 2-bit-per-clock read transfers, doubling effective throughput vs. standard SPI - critical for fast boot and real-time firmware loading. |
| Flexible Erase Architecture | Supports 256-byte page, 4/32/64-kByte block, and full-chip erase - minimizes wasted space when updating small code modules or data tables. |
| OTP Security Register | 128-byte one-time programmable area with 64-byte factory-unique ID and 64-byte user space - enables secure device identity and cryptographic key binding. |
| Hardware Write Protection | WP pin directly locks protected sectors and status register bits - prevents accidental or malicious firmware corruption during field operation. |
| Ultra-Deep Power-Down Mode | 200 nA typical current draw - extends battery life in energy-harvesting sensors and portable medical devices between wake cycles. |
| Industrial Temperature Range | Rated for –40°C to +125°C operation - qualified for under-hood automotive, industrial PLCs, and outdoor telecom equipment. |
Applications
| Automotive Instrument Clusters | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated display graphics, gauge animations, and vehicle-specific configuration data in digital dashboards. IC Role / Device Role / Timing Role: Non-volatile code and parameter storage with fast read access to support sub-100 ms boot and dynamic UI rendering. Use Value: 6 ns tV and 104 MHz Dual-I/O operation reduce boot latency; 125°C rating ensures reliability behind automotive glass. | Use Scenario: Holding ladder logic programs, I/O mapping tables, and calibration coefficients in programmable logic controllers. IC Role / Device Role / Timing Role: Field-updatable firmware storage with hardware write protection to prevent unauthorized runtime modification. Use Value: WP pin and sector locking prevent accidental overwrite during maintenance; 100,000-cycle endurance supports decades of firmware revisions. |
| Smart Home Hub Boot Memory | Medical Infusion Pump Configuration |
Use Scenario: Hosting bootloader, OS kernel, and OTA update staging area in Wi-Fi/Zigbee gateway devices. IC Role / Device Role / Timing Role: Primary boot source for ARM Cortex-M7 host MCU, accessed via SPI at 80+ MHz for rapid startup. Use Value: Dual-I/O read achieves >80 MB/s effective bandwidth; ultra-deep power-down (200 nA) extends battery backup duration. | Use Scenario: Storing drug library profiles, dosage limits, and audit logs in FDA-cleared infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-evident non-volatile storage with factory-programmed unique ID for traceability and regulatory compliance. Use Value: 64-byte factory OTP ID enables serialized device tracking; 20-year data retention meets medical device lifecycle requirements. |
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, 1.7–2.0 V supply only, no OTP register, 100,000-cycle endurance at 85°C | Lacks hardware write protection pin and OTP security features; requires external logic for sector locking | Select when maximum read speed and lowest voltage operation are prioritized over security and industrial temp range. |
| Micron MT25QL02GA | 2 Mbit density, 133 MHz max clock, Quad-SPI support (not Dual-I/O), 1.7–2.0 V supply, 100,000-cycle endurance at 85°C | Supports QSPI for higher bandwidth but lacks WP/HOLD pins and OTP register; not rated beyond +105°C | Choose for QSPI-capable hosts needing higher throughput; avoid where hardware write protection or 125°C operation is required. |
Compared with W25Q20EW and MT25QL02GA, the AT25DF021A-MHNHR-T uniquely combines industrial temperature support (–40°C to +125°C), integrated WP pin for hardware locking, and factory-programmed OTP ID - making it optimal for safety-critical and long-lifecycle embedded systems requiring traceability and tamper resistance.
Availability
AT25DF021A-MHNHR-T is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLC firmware storage, and smart home hub boot memory requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT25DF021A-MHNHR-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 markets.
The AT25DF021A product line delivers SPI Flash memory optimized for mixed code-and-data storage in resource-constrained embedded systems, emphasizing flexibility, security, and industrial-grade reliability.
FAQ
What is the operating voltage range for the AT25DF021A-MHNHR-T?
The AT25DF021A-MHNHR-T operates from 1.65 V to 3.6 V over the –40°C to +85°C temperature range, and from 1.7 V to 3.6 V over the extended –40°C to +125°C range. This wide supply range allows direct integration with both 1.8 V and 3.3 V microcontroller I/O domains without level-shifting circuitry, simplifying board design and reducing BOM cost.
Does the AT25DF021A-MHNHR-T support Dual-I/O read mode, and what benefit does it provide?
Yes, the AT25DF021A-MHNHR-T supports Dual-I/O read mode using SI (I/O0) and SO (I/O1) pins to output two bits per SCK falling edge. This doubles effective read bandwidth compared to standard single-I/O SPI, enabling faster boot times and reduced firmware load latency - especially valuable in real-time embedded systems where deterministic startup performance is critical.
How is hardware write protection implemented on the AT25DF021A-MHNHR-T?
Hardware write protection on the AT25DF021A-MHNHR-T is controlled by the WP (Write Protect) pin, which must be held low to lock protected sectors and prevent writes to status register bits. The WP pin is internally pulled high, so it can be left floating if unused - but Renesas recommends connecting it to VCC externally unless protection is actively required to avoid unintended locking.
What security features does the AT25DF021A-MHNHR-T include?
The AT25DF021A-MHNHR-T includes a 128-byte One-Time Programmable (OTP) Security Register: 64 bytes are factory-programmed with a unique device identifier, and 64 bytes are user-programmable for secure keys or system-specific data. This enables device serialization, cryptographic binding, and ESN storage - essential for anti-counterfeiting and regulatory compliance in medical and industrial applications.
What package type is used for the AT25DF021A-MHNHR-T?
The AT25DF021A-MHNHR-T uses an 8-lead SOIC (150-mil) package, compliant with JEDEC MS-012 standards. This surface-mount package offers proven manufacturability, thermal performance suitable for industrial environments, and compatibility with standard reflow soldering profiles - making it ideal for high-volume production of automotive and industrial electronics.
AT25DF021A-MHNHR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN 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 (5x6)
AT25DF021A-MHNHR-T FAQ
1.How can I place an order for AT25DF021A-MHNHR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF021A-MHNHR-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-MHNHR-T reliable?
The price and inventory of AT25DF021A-MHNHR-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-MHNHR-T is usually 5 days.
3.What payment methods are accepted for AT25DF021A-MHNHR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF021A-MHNHR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF021A-MHNHR-T?
AT25DF021A-MHNHR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF021A-MHNHR-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-MHNHR-T?
For technical support, including AT25DF021A-MHNHR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF021A-MHNHR-T requirements.
6.How does Aetrix verify that AT25DF021A-MHNHR-T is sourced from the original manufacturer or authorized distributors?
All AT25DF021A-MHNHR-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-MHNHR-T meets industry standards.
7.What is the process for return or replacement of AT25DF021A-MHNHR-T?
All AT25DF021A-MHNHR-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF021A-MHNHR-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-MHNHR-T part is unused and in its original packaging.
Return procedure for AT25DF021A-MHNHR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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