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Renesas AT25XE021A-SSHN-T
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- Part No.:
- AT25XE021A-SSHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25XE021A-SSHN-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,446
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Product details
Overview
AT25XE021A-SSHN-T from Renesas Electronics is a 2-Mbit SPI serial 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, supports SPI Modes 0/3 and Dual-I/O read, delivers 70 MHz max clock frequency, and achieves 6 ns clock-to-output timing - enabling fast boot and real-time firmware updates in industrial controllers and IoT edge nodes.
For engineers reviewing the AT25XE021A-SSHN-T datasheet, AT25XE021A-SSHN-T pinout, AT25XE021A-SSHN-T application, or AT25XE021A-SSHN-T equivalent, key selection considerations include its 256-byte page erase granularity, 128-byte OTP security register with factory-programmed unique ID, ultra-deep power-down current (200 nA), and support for hardware write protection via WP pin in 8-lead SOIC package.
Technical Context
The AT25XE021A-SSHN-T implements a flexible erase architecture with four uniform block sizes (4 kB, 32 kB, 64 kB) plus 256-byte page erase, allowing precise allocation of code and data segments without memory waste. Its Dual-I/O read mode doubles throughput by outputting two bits per SCK falling edge using SI (I/O0) and SO (I/O1).
Internal control logic integrates hardware write protection (WP pin), HOLD functionality for bus pause without reset, and status register polling for program/erase completion. The device includes dedicated OTP security register space (64 bytes factory ID + 64 bytes user programmable) and supports JEDEC-standard manufacturer/device ID reads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 bytes) - sufficient for bootloader + firmware image in compact MCU systems |
| Supply Voltage | 1.65 V – 3.6 V - enables direct interface with 1.8 V and 3.3 V logic without level shifters |
| Max Clock Frequency | 70 MHz - supports high-speed read access for fast application startup and OTA update verification |
| Read Latency | 6 ns clock-to-output (tV) - minimizes wait states during sequential instruction fetch |
| Erase Granularity | 256-byte page, 4/32/64-kB blocks - allows fine-grained firmware patching and data logging without full chip erase |
| Power-Down Current | 200 nA ultra-deep power-down - extends battery life in always-on sensor nodes and wearables |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - meets industrial lifecycle requirements |
Pinout & Package
AT25XE021A-SSHN-T is packaged in an industry-standard 8-lead SOIC (150-mil) body. Pin functions are fully SPI-compatible with dual I/O capability enabled during specific read commands.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition low to initiate command, high to terminate - controls device selection and standby entry |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI), falling edge clocks output (SO/I/O1) |
| SI (I/O0) | Serial Input / Dual-I/O Data 0 | Command/address/data input; becomes bidirectional I/O0 during Dual-I/O read for parallel bit streaming |
| SO (I/O1) | Serial Output / Dual-I/O Data 1 | Data output during standard read; remains output as I/O1 in Dual-I/O mode for concurrent 2-bit transfer |
| WP | Write Protect | Hardware lock control; low enables sector protection - prevents accidental firmware overwrite during field operation |
| HOLD | Communication Hold | Pauses ongoing SPI transaction without deselecting device - preserves state during interrupt servicing |
| VCC | Power Supply | 1.65–3.6 V single supply - eliminates need for auxiliary voltage rails in low-power designs |
| GND | Ground Reference | System ground return path - critical for noise immunity in mixed-signal embedded applications |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Enables 2-bit-per-clock read throughput - cuts firmware load time by ~50% vs. standard SPI read at same clock rate |
| Flexible Erase Architecture | Supports 256-byte page + multiple uniform block sizes - eliminates wasted sectors when updating partial firmware images |
| 128-byte OTP Security Register | 64 bytes factory-programmed unique ID + 64 bytes user-programmable - enables secure device authentication and ESN binding |
| Ultra-Deep Power-Down | 200 nA typical current draw - extends shelf life and operational runtime in battery-powered edge devices |
| Hardware Write Protection | WP pin locks protected sectors independently of software state - prevents corruption during brown-out or reset events |
Applications
| Firmware Boot Storage | IoT Edge Node Data Logging |
|---|---|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M microcontrollers in smart meters and PLCs. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access read and deterministic page erase for over-the-air updates. Use Value: 6 ns tV latency and 70 MHz clock support reduce boot time; 256-byte page erase enables atomic firmware patching without disrupting active code regions. |
Use Scenario: Capturing sensor readings and event logs in battery-powered environmental monitors deployed for >10 years. IC Role / Device Role / Timing Role: Low-power, high-endurance data buffer with sector-level protection against accidental overwrite. Use Value: 200 nA ultra-deep power-down extends battery life; 100K cycle endurance ensures reliable logging across full product lifetime. |
| Industrial HMI Configuration Storage | Medical Device Calibration Data |
Use Scenario: Persisting UI layout, language packs, and user preferences in human-machine interface panels used in factory automation. IC Role / Device Role / Timing Role: Secure, field-upgradable configuration memory with hardware write lock for critical settings. Use Value: WP pin hardware lock prevents unauthorized modification of safety-critical parameters; OTP register stores calibration keys tied to device identity. |
Use Scenario: Storing factory-calibrated sensor coefficients and regulatory compliance metadata in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant, long-retention non-volatile memory for traceable medical device data. Use Value: 20-year data retention meets FDA 21 CFR Part 11 requirements; unique factory ID enables audit-trail linkage to calibration certificates. |
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 only, no Dual-I/O mode, 4 kB sector erase only | Limited to 1.8 V systems; lacks page-erase flexibility and dual-read speed boost | Select when operating exclusively at 1.8 V and Dual-I/O throughput is unnecessary |
| Macronix MX25L2033F | 2 Mbit density, 2.7–3.6 V supply, supports Dual-I/O but no OTP register or ultra-deep power-down (4 µA min) | Requires higher VCC; missing unique ID and lowest-power sleep mode for battery use | Prefer for 3.3 V systems where OTP security and sub-µA sleep are not required |
Compared with W25Q20EW and MX25L2033F, the AT25XE021A-SSHN-T uniquely combines 1.65–3.6 V operation, Dual-I/O read acceleration, 256-byte page erase, and 200 nA ultra-deep power-down - making it optimal for battery-powered, multi-voltage, and security-sensitive embedded designs.
Availability
AT25XE021A-SSHN-T is available at Aetrix Electronics and suitable for industrial control, IoT edge node, and medical device applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25XE021A-SSHN-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 markets.
The AT25XE021A-SSHN-T belongs to Renesas' serial Flash memory product line, engineered specifically for embedded systems needing low-voltage operation, flexible erase granularity, and integrated security features in compact packages.
FAQ
What is the operating voltage range of the AT25XE021A-SSHN-T?
The AT25XE021A-SSHN-T operates from 1.65 V to 3.6 V, supporting both 1.8 V and 3.3 V system interfaces without external level shifting. This wide supply range allows direct integration into mixed-voltage designs such as battery-powered sensors with 1.8 V MCUs and 3.3 V peripherals. The AT25XE021A-SSHN-T maintains full functionality-including 70 MHz operation and Dual-I/O read-across this entire voltage window.
Does the AT25XE021A-SSHN-T support Dual-I/O read mode, and how does it improve performance?
Yes, the AT25XE021A-SSHN-T supports Dual-I/O read mode, using both SI (I/O0) and SO (I/O1) pins to output two bits per SCK falling edge. This doubles effective read throughput compared to standard SPI read at the same clock frequency. For example, at 70 MHz, Dual-I/O achieves up to 140 Mbps read bandwidth - significantly accelerating firmware loading and configuration retrieval in time-critical applications. The AT25XE021A-SSHN-T implements this without requiring additional pins or external circuitry.
What erase options are available on the AT25XE021A-SSHN-T, and why does granularity matter?
The AT25XE021A-SSHN-T offers 256-byte page erase, plus uniform 4 kB, 32 kB, and 64 kB block erase, and full chip erase. Fine-grained 256-byte erase enables atomic updates of small firmware patches or configuration records without disturbing adjacent code or data - reducing risk of corruption and eliminating wasted memory space common with larger-sector Flash. This makes the AT25XE021A-SSHN-T especially valuable in systems with frequent field updates and strict memory utilization constraints.
How is security implemented in the AT25XE021A-SSHN-T?
Security in the AT25XE021A-SSHN-T centers on its 128-byte OTP (One-Time Programmable) 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 contents cannot be altered - providing tamper-resistant storage for cryptographic material. Combined with hardware write protection via the WP pin and sector-lock commands, the AT25XE021A-SSHN-T delivers layered security for trusted boot and device authentication workflows.
What is the ultra-deep power-down current of the AT25XE021A-SSHN-T, and in which applications is it critical?
The AT25XE021A-SSHN-T draws just 200 nA typical current in ultra-deep power-down mode - among the lowest in its class. This feature is critical for battery-powered applications with multi-year deployment requirements, such as wireless sensor networks, asset trackers, and implantable or portable medical devices. By minimizing quiescent current during idle periods, the AT25XE021A-SSHN-T directly extends operational lifetime and reduces maintenance frequency. Its ultra-deep power-down state is entered via command and exited with minimal latency, preserving system responsiveness.
AT25XE021A-SSHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 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-SOIC
AT25XE021A-SSHN-T FAQ
1.How can I place an order for AT25XE021A-SSHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE021A-SSHN-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-SSHN-T reliable?
The price and inventory of AT25XE021A-SSHN-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-SSHN-T is usually 5 days.
3.What payment methods are accepted for AT25XE021A-SSHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE021A-SSHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE021A-SSHN-T?
AT25XE021A-SSHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE021A-SSHN-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-SSHN-T?
For technical support, including AT25XE021A-SSHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE021A-SSHN-T requirements.
6.How does Aetrix verify that AT25XE021A-SSHN-T is sourced from the original manufacturer or authorized distributors?
All AT25XE021A-SSHN-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-SSHN-T meets industry standards.
7.What is the process for return or replacement of AT25XE021A-SSHN-T?
All AT25XE021A-SSHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE021A-SSHN-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-SSHN-T part is unused and in its original packaging.
Return procedure for AT25XE021A-SSHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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