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Renesas AT25DF021A-XMHN-T
- Part No.:
- AT25DF021A-XMHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25DF021A-XMHN-T.pdf
- Description:
- IC FLASH 2MBIT SPI 104MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:19,945
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Product details
Overview
AT25DF021A-XMHN-T from Renesas Electronics is a 2-Mbit serial SPI Flash memory IC designed for code shadowing and embedded data storage in resource-constrained systems. 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-XMHN-T datasheet, AT25DF021A-XMHN-T pinout, AT25DF021A-XMHN-T application, or AT25DF021A-XMHN-T equivalent, key selection criteria include industrial temperature support, ultra-low deep power-down current (200 nA), hardware write protection via WP pin, OTP security register, and compatibility with SPI Modes 0 and 3 in space- and power-sensitive designs.
Technical Context
The AT25DF021A-XMHN-T implements a serial peripheral interface with dual I/O capability, enabling two-bit data output per SCK falling edge during Dual-Output Read commands. Its memory architecture supports byte/page program (1–256 bytes), sequential programming, and four-tiered erase (page, 4-kB, 32-kB, 64-kB, full chip), optimized for mixed code+data storage without external EEPROM.
It integrates hardware-controlled sector locking via the WP pin, a 128-byte OTP security register (64 bytes factory-unique, 64 bytes user-programmable), and status register polling for operation completion. Power management includes Deep Power-Down (4.5 µA) and Ultra-Deep Power-Down (200 nA) modes with software-resumable control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256 KByte) - sufficient for boot code, firmware images, and configuration data in compact MCU-based systems. |
| Supply Voltage Range | 1.65 V to 3.6 V - enables direct interfacing with 1.8 V and 3.3 V logic domains without level shifters. |
| Max Clock Frequency | 104 MHz - supports high-speed instruction fetch and data streaming in real-time applications. |
| Read Latency | 6 ns clock-to-output (tV) - minimizes wait states during code execution from flash, improving system responsiveness. |
| Erase Granularity | 256-byte page, 4/32/64-kByte uniform blocks - allows precise overwriting of firmware patches or logging data without disturbing adjacent code segments. |
| Endurance & Retention | 100,000 P/E cycles / 20-year data retention - suitable for field-upgradable devices requiring long-term reliability. |
| Power Consumption | 200 nA Ultra Deep Power-Down - extends battery life in always-on IoT sensors and wearable endpoints. |
Pinout & Package
AT25DF021A-XMHN-T is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint. Pin functions are fully SPI-compliant and support hardware write protection and hold functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command latching on high-to-low transition and terminates operations on low-to-high transition. |
| SCK | Serial Clock | Master-generated clock; commands/addresses sampled on rising edge, data output on falling edge. |
| SI (I/O0) | Serial Input / Dual-I/O Data 0 | Input for commands, addresses, and program data; becomes bidirectional I/O0 in Dual-I/O read mode. |
| SO (I/O1) | Serial Output / Dual-I/O Data 1 | Output for read data; remains active as I/O1 in Dual-I/O mode to enable 2-bit parallel output per SCK cycle. |
| WP | Write Protect | Hardware lock control; low-asserted to prevent accidental writes/erases on protected sectors. |
| HOLD | Communication Hold | Pauses ongoing SPI transfers without deselecting device or interrupting internal program/erase cycles. |
| VCC | Power Supply | Single 1.65–3.6 V supply - eliminates need for auxiliary voltage rails in low-power embedded designs. |
| GND | Ground Reference | Common return path for all digital and analog circuitry; must be connected to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Enables 2× throughput vs. standard SPI read by outputting two bits per SCK falling edge - reduces firmware load time by up to 50%. |
| Flexible Erase Architecture | Supports 256-byte page erase alongside 4/32/64-kB block erase - avoids wasted space when updating small firmware modules or logging records. |
| 128-Byte OTP Security Register | Contains 64-byte factory-unique ID and 64-byte user-programmable area - enables secure device authentication and ESN binding without external crypto ICs. |
| Ultra-Deep Power-Down Mode | Draws only 200 nA typical - ideal for battery-powered nodes that sleep >99% of the time while retaining nonvolatile state. |
| Hardware Write Protection | WP pin provides physical lock override independent of software commands - prevents corruption during brown-out or firmware faults. |
Applications
| Industrial PLC Firmware Storage | Medical Sensor Data Logging |
|---|---|
Use Scenario: Storing boot firmware and field-upgradable control algorithms in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast random-access read and deterministic page erase for safe over-the-air updates. Use Value: 104 MHz Dual-I/O read speed ensures sub-10 ms firmware load time; 100,000-cycle endurance supports 10+ years of scheduled updates. | Use Scenario: Capturing timestamped physiological measurements (ECG, SpO₂) in portable diagnostic devices with intermittent wireless upload. IC Role / Device Role / Timing Role: Low-power data buffer with atomic 256-byte page writes and hardware sector locking to preserve integrity during power loss. Use Value: 200 nA Ultra Deep Power-Down extends single-CR2032 battery life beyond 2 years; 4-kB block erase enables efficient log rotation. |
| Smart Meter Bootloader | Automotive Body Control Module |
Use Scenario: Hosting secure bootloader and cryptographic keys in utility smart meters subject to ANSI C12.22 and DLMS/COSEM standards. IC Role / Device Role / Timing Role: Trusted storage for immutable boot code and 128-byte OTP-secured keys used in AES-128 firmware validation. Use Value: Factory-programmed unique ID enables per-device key derivation; hardware WP prevents tampering during meter certification testing. | Use Scenario: Storing calibration tables, seat position profiles, and lighting configuration in automotive body control units operating across –40°C to +125°C. IC Role / Device Role / Timing Role: High-temperature tolerant serial flash supporting AEC-Q100 Grade 2 requirements with guaranteed 20-year data retention. Use Value: Validated operation at 125°C enables placement near power electronics; 6 ns tV ensures glitch-free CAN/LIN message handling during boot. |
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, 1.7–2.0 V supply range only; no Ultra-Deep Power-Down mode (1 µA DPD); lacks OTP register. | Better suited for cost-sensitive consumer wearables where extended battery life is secondary to BOM cost. | Select W25Q20EW only if system operates strictly at 1.8 V and does not require secure serialization or sub-µA sleep current. |
| Macronix MX25U2033F | 2 Mbit, 1.65–3.6 V, supports DTR mode (vs. Dual-I/O), 133 MHz max clock; no factory-unique ID in OTP. | Preferred for high-throughput data acquisition systems needing faster burst reads but no hardware-based device identity. | Choose MX25U2033F when maximum read bandwidth is critical and secure device binding is handled externally. |
Compared with W25Q20EW and MX25U2033F, the AT25DF021A-XMHN-T uniquely combines ultra-low 200 nA sleep current, integrated factory-unique OTP ID, and hardware WP lock - making it optimal for secure, battery-constrained industrial and medical edge devices.
Availability
AT25DF021A-XMHN-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical sensor data logging, smart meter bootloader hosting, and automotive body control module configuration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT25DF021A-XMHN-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, infrastructure, and IoT applications.
The AT25DF021A belongs to Renesas' serial NOR Flash product line, engineered specifically for reliable, low-voltage, low-power code and data storage in space-constrained embedded systems with stringent longevity and security requirements.
FAQ
What is the operating temperature range supported by the AT25DF021A-XMHN-T?
The AT25DF021A-XMHN-T is rated for full industrial operation from –40°C to +85°C. Its electrical specifications-including 104 MHz maximum clock frequency, 6 ns clock-to-output timing, and 100,000 program/erase cycles-are guaranteed across this range. The part number suffix "XMHN-T" specifically denotes the industrial-grade variant compliant with these conditions.
Does the AT25DF021A-XMHN-T support both SPI Mode 0 and Mode 3?
Yes, the AT25DF021A-XMHN-T explicitly supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in the official Renesas datasheet DS-AT25DF021A-042. This dual-mode compatibility ensures interoperability with diverse host microcontrollers without requiring signal inversion or custom timing adjustments.
How does the hardware write protection (WP) pin function on the AT25DF021A-XMHN-T?
The WP pin on the AT25DF021A-XMHN-T provides hardware-level sector locking: when asserted low, it prevents all write and erase commands from affecting protected memory regions-even if software commands are issued. The pin is internally pulled high, so it may float if unused, though Renesas recommends tying it to VCC for noise immunity. This complements software-based protection for robust firmware integrity.
What is the purpose and structure of the OTP security register in the AT25DF021A-XMHN-T?
The AT25DF021A-XMHN-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 keys, certificates, or calibration data. Once written, OTP locations cannot be altered-enabling secure device serialization, ESN binding, and tamper-resistant key storage without external security ICs.
Can the AT25DF021A-XMHN-T operate from a 1.8 V supply in industrial temperature conditions?
Yes, the AT25DF021A-XMHN-T supports 1.65 V to 3.6 V operation across –40°C to +85°C, fully covering 1.8 V nominal supply rails. All key performance parameters-including 104 MHz max clock, 6 ns tV, and 100,000 P/E cycles-are specified and guaranteed at 1.8 V within this temperature range, making it suitable for modern low-voltage MCU interfaces.
AT25DF021A-XMHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- 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-TSSOP
AT25DF021A-XMHN-T FAQ
1.How can I place an order for AT25DF021A-XMHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF021A-XMHN-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-XMHN-T reliable?
The price and inventory of AT25DF021A-XMHN-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-XMHN-T is usually 5 days.
3.What payment methods are accepted for AT25DF021A-XMHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF021A-XMHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF021A-XMHN-T?
AT25DF021A-XMHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF021A-XMHN-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-XMHN-T?
For technical support, including AT25DF021A-XMHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF021A-XMHN-T requirements.
6.How does Aetrix verify that AT25DF021A-XMHN-T is sourced from the original manufacturer or authorized distributors?
All AT25DF021A-XMHN-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-XMHN-T meets industry standards.
7.What is the process for return or replacement of AT25DF021A-XMHN-T?
All AT25DF021A-XMHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF021A-XMHN-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-XMHN-T part is unused and in its original packaging.
Return procedure for AT25DF021A-XMHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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