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Renesas AT25XE021A-MHN-Y
- Part No.:
- AT25XE021A-MHN-Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25XE021A-MHN-Y.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,452
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Product details
Overview
AT25XE021A-MHN-Y 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 (−40°C to +85°C). It serves as nonvolatile code/data storage in microcontroller boot systems, firmware update buffers, and IoT edge node configuration storage.
For engineers reviewing the AT25XE021A-MHN-Y datasheet, AT25XE021A-MHN-Y pinout, AT25XE021A-MHN-Y application, or AT25XE021A-MHN-Y equivalent, key selection criteria include Dual-I/O read throughput, ultra-deep power-down current (200 nA), flexible erase granularity (256-byte page to 64-kByte block), OTP security register usability, and SOIC-8 package compatibility with legacy PCB layouts.
Technical Context
The AT25XE021A-MHN-Y implements a standard SPI interface compliant with Modes 0 and 3, with dedicated SI (I/O0) and SO (I/O1) pins enabling dual-bit output reads. Its internal architecture includes SRAM data buffer, Y/X decoders, and protection logic supporting hardware write protection via WP pin and software sector locking.
It executes byte/page program (1–256 bytes), sequential program mode, and four-tiered erase operations-page (256 B), 4-kB/32-kB/64-kB blocks, and full chip-with automatic erase/program failure reporting. Status register polling and active status interrupt support real-time operation monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256 kByte) - sufficient for MCU boot code, firmware patches, and device configuration tables in space-constrained designs. |
| Max Clock Frequency | 70 MHz - enables high-speed read transfers up to ~17.5 MB/s in Dual-I/O mode, reducing firmware load latency. |
| Read Latency (tV) | 6 ns - minimal clock-to-output delay ensures tight timing margins in high-frequency SPI master implementations. |
| Erase Granularity | 256-byte page / 4-kB–64-kB uniform blocks - allows precise overwriting of firmware segments without disturbing adjacent code or data. |
| Power-Down Current | 200 nA ultra-deep power-down - extends battery life in always-on IoT sensors and wearable devices during idle periods. |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - meets long-life requirements for industrial control firmware and medical device logs. |
| Supply Voltage | 1.65 V to 3.6 V - interoperable with 1.8 V and 3.3 V logic domains without level-shifting circuitry. |
Pinout & Package
AT25XE021A-MHN-Y is packaged in an 8-lead SOIC (150-mil) with standard pinout compatible with JEDEC MS-012. All pins are electrically validated per datasheet Rev.L.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition low to initiate command, high to terminate; controls standby entry timing after self-timed operations. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output; supports up to 70 MHz operation. |
| SI (I/O0) | Serial Input / Dual-I/O Data Line 0 | Primary command/address/data input; becomes bidirectional I/O0 during Dual-I/O reads to deliver LSB of dual-bit output stream. |
| SO (I/O1) | Serial Output / Dual-I/O Data Line 1 | Primary data output; remains I/O1 in Dual-I/O mode to deliver MSB of dual-bit output on each SCK falling edge. |
| WP | Write Protect | Hardware lock control; low assertion disables write/erase commands to protected sectors; internally pulled-high, safe to float if unused. |
| HOLD | Communication Hold | Pauses ongoing SPI transfer without deselecting device; requires CS low and SCK low to activate; preserves internal state during host interrupts. |
| VCC | Power Supply | Single 1.65–3.6 V supply; powers all logic and memory array; no auxiliary voltage required for programming or erasing. |
| GND | Ground Reference | System ground return path; must be low-impedance connection to minimize noise coupling into sensitive read paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Support | Delivers 2 bits per SCK falling edge, doubling effective read bandwidth vs. standard SPI - critical for fast boot and OTA update staging. |
| Flexible Erase Architecture | Four erase granularities (256 B page, 4/32/64 kB blocks, full chip) enable optimal memory utilization in mixed code-and-data applications. |
| 128-Byte OTP Security Register | Factory-programmed 64-byte unique ID + 64-byte user-programmable space - supports secure device identity, ESN binding, and cryptographic key storage. |
| Ultra-Deep Power-Down Mode | 200 nA typical current draw - enables multi-year battery operation in maintenance-free sensor nodes and energy-harvesting endpoints. |
| Hardware + Software Protection | WP pin enables hardware sector locking; status register bits allow fine-grained software-based sector protection - defense-in-depth for firmware integrity. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O mapping tables in programmable logic controllers with infrequent but critical firmware updates. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing SPI-bootable image and parameter backup with sector-level write protection. Use Value: 4-kB block erase enables atomic update of logic modules without disrupting runtime execution of other tasks. |
Use Scenario: Holding calibrated sensor offsets, patient-specific therapy profiles, and audit logs in portable diagnostic equipment requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, long-retention data logger and configuration store interfaced to ARM Cortex-M4 host MCU. Use Value: OTP register stores factory-calibrated coefficients and device serial number, preventing tampering during service lifecycle. |
| Smart Meter Bootloader Storage | Automotive Telematics OTA Cache |
Use Scenario: Hosting secure bootloader and cryptographic signature verification keys in ANSI C12.22-compliant electricity meters with anti-rollback enforcement. IC Role / Device Role / Timing Role: Trusted boot source with hardware write protection (WP pin) and status-register-controlled sector locks. Use Value: 100,000 endurance cycles and 20-year retention ensure reliable operation across 15+ year utility meter deployments. |
Use Scenario: Caching signed firmware delta updates in vehicle telematics control units before validation and installation during parked state. IC Role / Device Role / Timing Role: High-speed, low-power SPI Flash acting as intermediate staging buffer between CAN-FD gateway and application processor. Use Value: 70 MHz Dual-I/O read enables rapid delta patch loading; ultra-deep power-down minimizes parasitic drain on 12 V battery. |
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, same SOIC-8 package, but only supports standard SPI (no Dual-I/O); 104 MHz max clock; 2.7–3.6 V supply only. | Lacks Dual-I/O bandwidth boost and 1.65 V low-voltage operation; unsuitable for 1.8 V systems or latency-sensitive boot paths. | Select when cost sensitivity outweighs Dual-I/O performance need and system operates strictly at 3.3 V. |
| Micron MT25QL02G | 2 Gbit density (1000× larger), QSPI interface, 133 MHz max, 1.7–2.0 V or 2.7–3.6 V dual supply options; supports XIP mode. | Over-specified capacity and interface complexity; requires QSPI controller and layout changes; not drop-in replaceable. | Choose only for future-proofing or when scalable memory expansion beyond 2 Mbit is architecturally mandated. |
Compared with W25Q20EW and MT25QL02G, the AT25XE021A-MHN-Y uniquely balances 1.65 V compatibility, Dual-I/O throughput, ultra-low deep-sleep current, and SOIC-8 footprint - making it optimal for cost- and power-constrained embedded systems where precise 2 Mbit allocation matters.
Availability
AT25XE021A-MHN-Y is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and smart meter bootloader storage requiring stable component supply across extended product lifecycles.
Supply support for AT25XE021A-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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.
The AT25XE021A-MHN-Y belongs to Renesas' serial Flash memory product line, engineered specifically for robust, low-voltage, high-reliability code and data storage in resource-constrained embedded systems.
FAQ
What is the operating voltage range of the AT25XE021A-MHN-Y?
The AT25XE021A-MHN-Y operates across a single supply voltage range of 1.65 V to 3.6 V. This wide range enables direct interfacing with both 1.8 V and 3.3 V microcontrollers without level shifters. The device guarantees full functionality-including program, erase, and Dual-I/O read-at all voltages within this range, as verified in DC Characteristics Table 16 of the official datasheet.
Does the AT25XE021A-MHN-Y support Dual-I/O read mode, and how is it enabled?
Yes, the AT25XE021A-MHN-Y supports Dual-I/O read using the 0Bh opcode. In this mode, SI (I/O0) and SO (I/O1) simultaneously output two bits per SCK falling edge, doubling read throughput. No configuration register setting is required-activation is command-driven. The AT25XE021A-MHN-Y maintains full backward compatibility with standard SPI 03h read commands.
What package type does the AT25XE021A-MHN-Y use, and is it lead-free?
The AT25XE021A-MHN-Y uses an 8-lead SOIC (150-mil) package, designated by the "MHN" suffix in the part number. It complies with RoHS, Pb-free, and halide-free standards per JEDEC MS-012. Pin dimensions, thermal profile, and solder reflow specifications are fully documented in Section 17.1 of the AT25XE021A datasheet.
How does the hardware write protection work on the AT25XE021A-MHN-Y?
The AT25XE021A-MHN-Y implements hardware write protection via the WP (Write Protect) pin. When WP is driven low, it globally inhibits all write, program, and erase commands to sectors configured for hardware protection-regardless of software status register settings. The pin is internally pulled-high, so leaving it unconnected defaults to unprotected mode unless externally tied to VCC or GND.
What is the purpose and structure of the OTP security register in the AT25XE021A-MHN-Y?
The AT25XE021A-MHN-Y includes a 128-byte One-Time Programmable (OTP) security register: 64 bytes factory-programmed with a unique device identifier, and 64 bytes user-programmable for secure keys or calibration data. Once written, OTP bytes cannot be erased or rewritten-ensuring permanent binding of identity or secrets. Programming requires the 02h command and Write Enable sequence, identical to standard page programming flow.
AT25XE021A-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:
- 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-Y FAQ
1.How can I place an order for AT25XE021A-MHN-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE021A-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 AT25XE021A-MHN-Y reliable?
The price and inventory of AT25XE021A-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 AT25XE021A-MHN-Y is usually 5 days.
3.What payment methods are accepted for AT25XE021A-MHN-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE021A-MHN-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE021A-MHN-Y?
AT25XE021A-MHN-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE021A-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 AT25XE021A-MHN-Y?
For technical support, including AT25XE021A-MHN-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE021A-MHN-Y requirements.
6.How does Aetrix verify that AT25XE021A-MHN-Y is sourced from the original manufacturer or authorized distributors?
All AT25XE021A-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 AT25XE021A-MHN-Y meets industry standards.
7.What is the process for return or replacement of AT25XE021A-MHN-Y?
All AT25XE021A-MHN-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE021A-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 AT25XE021A-MHN-Y part is unused and in its original packaging.
Return procedure for AT25XE021A-MHN-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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