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Renesas AT25XE021A-MHN-T
- Part No.:
- AT25XE021A-MHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25XE021A-MHN-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,312
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Product details
Overview
AT25XE021A-MHN-T from Renesas Electronics is a 2-Mbit SPI serial Flash memory IC supporting Dual-I/O operation, 70 MHz max clock frequency, 6 ns clock-to-output delay, 1.65–3.6 V single supply, and industrial temperature range. It serves as non-volatile program/data storage in microcontroller-based embedded systems requiring fast read access and flexible erase granularity.
For engineers reviewing the AT25XE021A-MHN-T datasheet, AT25XE021A-MHN-T pinout, AT25XE021A-MHN-T application, or AT25XE021A-MHN-T equivalent, key selection criteria include Dual-I/O read bandwidth, page/block erase timing (2 ms / 45 ms), OTP security register usage, hardware write protection via WP pin, and ultra-deep power-down current (200 nA).
Technical Context
The AT25XE021A-MHN-T implements a standard SPI interface compliant with Modes 0 and 3, with dedicated SI (I/O0) and SO (I/O1) pins enabling Dual-Output Read for 2-bit-per-clock data throughput. Its internal architecture includes SRAM data buffers, Y/X decoders, and control logic managing page (256-byte), 4-kB/32-kB/64-kB block, and full-chip erase operations.
Erase and program execution are internally self-timed, with automatic failure detection reported via status register bits. Protection is enforced through both software commands and hardware WP pin assertion, while sector locking states are stored in volatile and non-volatile registers per JEDEC-compliant sector protection scheme.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 bytes), directly addressable for firmware boot code and runtime data storage |
| Interface | SPI-compatible with Dual-I/O support - doubles read bandwidth vs standard SPI without added pins |
| Max Clock Frequency | 70 MHz - enables ≤14 ns cycle time for high-speed instruction fetch in MCU boot scenarios |
| Read Latency | 6 ns clock-to-output (tV) - minimizes wait states during sequential code execution from flash |
| Erase Granularity | 256-byte page, 4/32/64-kB uniform blocks - allows fine-grained firmware updates without erasing entire application |
| Power-Down Current | 200 nA ultra-deep power-down - supports battery-backed IoT nodes requiring multi-year shelf life |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention - suitable for field-upgradable industrial controllers |
Pinout & Package
AT25XE021A-MHN-T is packaged in an 8-lead SOIC (150-mil) body, measuring 5.0 × 4.0 × 1.5 mm, RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition low to initiate command, high to terminate - controls device standby entry timing |
| SCK | Serial Clock | Input clock driving all SPI transfers; data latched on rising edge, output shifted on falling edge |
| SI (I/O0) | Serial Input / Dual-I/O Data Line 0 | Primary command/address/data input; becomes I/O0 output during Dual-Output Read for parallel bit streaming |
| SO (I/O1) | Serial Output / Dual-I/O Data Line 1 | Standard output during single-I/O reads; remains I/O1 output during Dual-Output Read for concurrent 2-bit output |
| WP | Write Protect | Hardware lock control - low state disables all write/erase commands regardless of software status register settings |
| HOLD | Hold Control | Pauses ongoing SPI transfer without deselecting device; requires CS low and SCK low to activate |
| VCC | Power Supply | Single 1.65–3.6 V rail - eliminates need for charge pumps or auxiliary voltage regulators |
| GND | Ground Reference | Common return path for all digital and analog circuitry; critical for stable SPI signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Enables 2-bit-per-clock data output using SI/SO as I/O0/I/O1 - increases effective read bandwidth by 100% over standard SPI |
| Flexible Erase Architecture | Supports 256-byte page, 4/32/64-kB blocks, and full chip erase - optimizes memory utilization for mixed code/data layouts |
| 128-byte OTP Security Register | Contains 64-byte factory-unique ID + 64-byte user-programmable space - enables secure device serialization and key binding |
| Ultra-Deep Power-Down | 200 nA typical current draw - extends battery life in always-on sensor nodes and wearables |
| Hardware Write Protection | WP pin asserts physical lock independent of software state - prevents accidental firmware corruption during field updates |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers with periodic field updates. IC Role / Device Role / Timing Role: Non-volatile boot memory providing fast read access and selective 4-kB block erase for incremental firmware patches. Use Value: 45 ms typical 4-kB block erase enables sub-second firmware update cycles without full reflash downtime. | Use Scenario: Holding calibrated sensor coefficients, network credentials, and OTA update staging area in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power configuration store with ultra-deep power-down mode activated between measurement intervals. Use Value: 200 nA deep-sleep current extends 10-year battery life in sealed, maintenance-free deployments. |
| Medical Diagnostic Handheld Boot Memory | Automotive Infotainment UI Asset Cache |
Use Scenario: Hosting bootloader and safety-critical application images in portable ultrasound devices requiring certified data retention. IC Role / Device Role / Timing Role: Certified 20-year data retention memory storing immutable boot code and regulatory compliance metadata. Use Value: 100,000 program/erase cycles and JEDEC-standard ID reading support audit-ready firmware version traceability. | Use Scenario: Caching graphical assets and voice recognition models in automotive head units where rapid UI response is required. IC Role / Device Role / Timing Role: High-bandwidth SPI Flash delivering 70 MHz Dual-I/O reads to feed GPU texture pipelines without DRAM buffering. Use Value: 6 ns tV latency and 70 MHz clock reduce UI frame load latency by ≥30% versus legacy 40 MHz SPI Flash. |
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, 1.65–1.95 V supply only; no ultra-deep power-down mode (1 µA min) | Limited to single-supply 1.8 V systems; lacks 200 nA sleep state for ultra-low-power designs | Select when operating exclusively at 1.8 V and deep power-down is not required |
| Micron MT25QL02G | 2 Gbit density (1000× larger); quad-I/O support; 1.7–2.0 V or 2.7–3.6 V dual-voltage options | Over-specified capacity and voltage range; higher cost and PCB footprint for 2 Mbit use cases | Select only if future scalability to larger code size or Quad-SPI interface is mandated |
Compared with W25Q20EW and MT25QL02G, the AT25XE021A-MHN-T uniquely balances 2 Mbit capacity, 1.65–3.6 V universal supply, Dual-I/O bandwidth, and 200 nA ultra-deep power-down - making it optimal for compact, battery-aware, and voltage-flexible embedded systems.
Availability
AT25XE021A-MHN-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node configuration, medical diagnostic handheld boot memory, and automotive infotainment UI asset caching requiring stable component supply across extended production lifecycles.
Supply support for AT25XE021A-MHN-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 AT25XE021A-MHN-T belongs to Renesas' serial Flash memory product line, engineered for high-reliability embedded systems needing flexible erase, low-voltage operation, and integrated security features like OTP serialization.
FAQ
What is the maximum SPI clock frequency supported by the AT25XE021A-MHN-T?
The AT25XE021A-MHN-T supports a maximum SPI clock frequency of 70 MHz under standard operating conditions (VCC = 2.7–3.6 V). At lower voltages (1.65–2.7 V), the maximum frequency is reduced per AC specifications in the datasheet. This high clock rate enables fast instruction fetch and data streaming in performance-sensitive applications such as automotive UI rendering or real-time firmware updates. The AT25XE021A-MHN-T maintains timing compliance across its full industrial temperature range (−40°C to +85°C).
Does the AT25XE021A-MHN-T support Dual-I/O read operations, and how is it enabled?
Yes, the AT25XE021A-MHN-T supports Dual-I/O read using the 3BH opcode. During this mode, the SI (I/O0) and SO (I/O1) pins simultaneously output two bits per clock cycle on the falling edge of SCK, doubling effective read bandwidth versus standard single-I/O mode. No configuration register setting is required - activation is command-driven. The AT25XE021A-MHN-T maintains full backward compatibility with standard SPI 03h read commands while offering this enhanced mode for bandwidth-constrained systems.
What is the purpose and structure of the OTP security register in the AT25XE021A-MHN-T?
The AT25XE021A-MHN-T includes a 128-byte One-Time Programmable (OTP) security register divided into two 64-byte sections: the first is factory-programmed with a unique device identifier, and the second is user-programmable for keys, certificates, or calibration data. Once written, OTP bytes cannot be altered. This register supports secure device authentication, ESN storage, and cryptographic key binding in regulated environments. The AT25XE021A-MHN-T provides dedicated Program and Read OTP commands (3AH/3BH) with status reporting to ensure reliable programming.
How does hardware write protection work on the AT25XE021A-MHN-T, and what happens when the WP pin is asserted?
Hardware write protection on the AT25XE021A-MHN-T is controlled by the active-low WP pin. When WP is driven low, all write, program, and erase commands are blocked regardless of software status register settings or sector protection bits - providing fail-safe prevention of accidental firmware corruption. The WP pin is internally pulled high, so it may be left floating if unused, though external connection to VCC is recommended. This physical lock complements software-based protection, and the AT25XE021A-MHN-T ensures WP assertion takes precedence in all operational modes.
What are the erase time specifications for different block sizes in the AT25XE021A-MHN-T?
The AT25XE021A-MHN-T specifies typical erase times of 2 ms for 256-byte pages, 45 ms for 4-kB blocks, 360 ms for 32-kB blocks, and 720 ms for 64-kB blocks. These values are measured at VCC = 3.0 V and TA = 25°C, with maximums defined in the datasheet's AC characteristics table. All erase operations are internally self-timed and verified; the status register reports completion or failure. These granular timings allow developers to select the optimal erase unit for their update strategy - for example, using 4-kB blocks for patch deployment or 256-byte pages for dynamic parameter logging - and the AT25XE021A-MHN-T guarantees deterministic behavior across its full operating range.
AT25XE021A-MHN-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:
- 70 MHz
- Write Cycle Time - Word, Page:
- 8µs, 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)
AT25XE021A-MHN-T FAQ
1.How can I place an order for AT25XE021A-MHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE021A-MHN-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 AT25XE021A-MHN-T reliable?
The price and inventory of AT25XE021A-MHN-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25XE021A-MHN-T is usually 5 days.
3.What payment methods are accepted for AT25XE021A-MHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE021A-MHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE021A-MHN-T?
AT25XE021A-MHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE021A-MHN-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 AT25XE021A-MHN-T?
For technical support, including AT25XE021A-MHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE021A-MHN-T requirements.
6.How does Aetrix verify that AT25XE021A-MHN-T is sourced from the original manufacturer or authorized distributors?
All AT25XE021A-MHN-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 AT25XE021A-MHN-T meets industry standards.
7.What is the process for return or replacement of AT25XE021A-MHN-T?
All AT25XE021A-MHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE021A-MHN-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 AT25XE021A-MHN-T part is unused and in its original packaging.
Return procedure for AT25XE021A-MHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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