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Renesas AT25XE021A-SSHN-B
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- Part No.:
- AT25XE021A-SSHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25XE021A-SSHN-B.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,420
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Product details
Overview
AT25XE021A-SSHN-B 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 nonvolatile code/data storage in microcontroller boot systems and firmware update modules.
For engineers reviewing the AT25XE021A-SSHN-B datasheet, AT25XE021A-SSHN-B pinout, AT25XE021A-SSHN-B application, or AT25XE021A-SSHN-B equivalent, key selection criteria include Dual-I/O read bandwidth, page/block erase granularity (256 B / 4 kB / 32 kB / 64 kB), OTP security register (128 B), ultra-deep power-down current (200 nA), and hardware write protection via WP pin.
Technical Context
The AT25XE021A-SSHN-B 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 during Dual-Output Read commands. Its internal architecture includes a 256-byte data buffer, Y/X decoders, and SRAM-based latching for efficient page programming.
It supports four distinct erase granularities-page (256 B), uniform 4-kB block, uniform 32-kB block, and uniform 64-kB block-enabling optimized memory utilization for mixed code-and-data applications. Protection is enforced via both software-configurable sector registers and hardware-controlled locking through the WP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 bytes), sufficient for MCU boot code + configuration data in space-constrained designs |
| Interface | SPI-compatible with Modes 0/3; Dual-I/O mode doubles read throughput without bus width change |
| Max Clock Frequency | 70 MHz - enables fast sequential reads (e.g., 140 MB/s theoretical Dual-I/O burst) |
| Access Time | 6 ns clock-to-output (tV) - ensures tight timing margins in high-speed controller interfaces |
| Erase Granularity | 256-byte page, 4-kB/32-kB/64-kB uniform blocks - minimizes wasted space during partial firmware updates |
| Power Consumption | 200 nA ultra-deep power-down current - critical for battery-backed IoT node retention |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention - meets industrial firmware lifecycle requirements |
Pinout & Package
AT25XE021A-SSHN-B is packaged in an 8-lead SOIC (150-mil) body per JEDEC MS-012, with gull-wing leads and 1.27 mm pitch. Pin 1 marked by notch or dot; pin 1 corner located at top-left when notch faces up.
| 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 timing |
| SCK | Serial Clock | Input clock driving all SPI transfers; data latched on rising edge (SI), output shifted on falling edge (SO) |
| SI (I/O0) | Serial Input / Dual-I/O Data 0 | Primary command/address/data input; becomes I/O0 output during Dual-I/O reads - requires bidirectional buffer control |
| SO (I/O1) | Serial Output / Dual-I/O Data 1 | Standard output during single-I/O reads; becomes I/O1 output during Dual-I/O reads - enables 2-bit parallel data transfer per SCK cycle |
| WP | Write Protect | Hardware lock control; low = enables sector protection - used with status register bits for robust firmware write safeguarding |
| HOLD | Hold Control | Pauses ongoing SPI communication without deselecting device - preserves state during interrupt servicing or bus arbitration |
| VCC | Power Supply | 1.65–3.6 V single rail; powers core logic and I/O buffers - eliminates need for charge pumps or auxiliary supplies |
| GND | Ground Reference | Common return path for VCC and signal integrity - requires low-inductance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Delivers 2× read bandwidth vs. standard SPI without increasing clock rate - reduces firmware load latency in resource-limited MCUs |
| Flexible Erase Architecture | Supports 256-B page, 4-kB, 32-kB, and 64-kB uniform blocks - enables precise over-the-air update partitioning and avoids full-chip erases |
| 128-byte OTP Security Register | Contains 64 B factory-unique ID + 64 B user-programmable space - enables secure device binding and cryptographic key storage |
| Ultra-Deep Power-Down | 200 nA typical current draw - extends battery life in always-on sensor nodes during extended sleep intervals |
| Hardware Write Protection | WP pin + status register bits allow layered protection - prevents accidental writes during brown-out or debug sessions |
Applications
| MCU Boot Memory | Firmware Update Storage |
|---|---|
Use Scenario: Stores primary bootloader and initial application image for ARM Cortex-M or RISC-V microcontrollers. IC Role / Device Role / Timing Role: Nonvolatile code storage accessed during cold start; delivers instructions via SPI x1 or x2 mode. Use Value: 6 ns tV and 70 MHz clock support reduce boot time; 256-B page erase allows patch-level bootloader updates without disrupting main firmware. | Use Scenario: Holds staged firmware images for secure OTA updates in smart home hubs and industrial gateways. IC Role / Device Role / Timing Role: Dual-I/O-capable data archive; receives encrypted payloads over UART/USB and stores them for post-verification execution. Use Value: 32-kB and 64-kB uniform blocks align with typical OTA packet sizes; hardware WP prevents corruption during power-loss events. |
| Configuration & Calibration Data | Secure Identity Storage |
Use Scenario: Retains sensor calibration coefficients, network credentials, and user preferences across power cycles in medical wearables. IC Role / Device Role / Timing Role: Low-power persistent data store; accessed infrequently but requiring guaranteed retention over 20 years. Use Value: 25 uA standby current and 20-year data retention meet Class II medical device requirements; 4-kB erase blocks isolate config sectors from code regions. | Use Scenario: Stores device-specific cryptographic keys and unique identifiers in payment terminals and access controllers. IC Role / Device Role / Timing Role: One-time programmable security vault; factory-programmed UID + user-key region protected by WP and status register locks. Use Value: 128-B OTP register provides tamper-resistant identity binding; hardware/software dual-locking prevents runtime key exposure. |
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 Ultra-Deep Power-Down (min 1 µA); 133 MHz max clock | Better suited for high-speed embedded systems with stable 1.8 V rails; lacks ultra-low-power sleep modes | Select W25Q20EW when system voltage is fixed at 1.8 V and maximum read speed is prioritized over battery longevity |
| Micron MT25QL02G | 2 Gbit density (1000× larger); Quad-SPI only; 1.7–2.0 V supply; 133 MHz max clock; no 256-B page erase | Designed for high-capacity code storage in automotive infotainment; incompatible pinout and voltage range | Choose MT25QL02G only for large-image applications where density outweighs voltage flexibility and fine-grain erase needs |
Compared with W25Q20EW and MT25QL02G, the AT25XE021A-SSHN-B uniquely balances wide 1.65–3.6 V operation, ultra-low 200 nA deep-sleep current, and 256-B page erase - making it optimal for battery-powered, multi-voltage, and field-upgradable embedded devices.
Availability
AT25XE021A-SSHN-B is available at Aetrix Electronics and suitable for MCU boot memory, firmware update storage, and secure identity storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25XE021A-SSHN-B 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and IoT markets.
The AT25XE021A product line delivers SPI Flash memory optimized for low-voltage, low-power, and flexible erase applications - targeting space- and energy-constrained embedded systems needing reliable nonvolatile storage.
FAQ
What is the operating voltage range of the AT25XE021A-SSHN-B?
The AT25XE021A-SSHN-B operates from 1.65 V to 3.6 V, enabling direct integration into mixed-voltage systems such as 1.8 V, 2.5 V, and 3.3 V microcontroller platforms without level-shifting. This wide supply range simplifies power architecture design and improves compatibility across legacy and next-generation host controllers. The AT25XE021A-SSHN-B maintains full functionality-including Dual-I/O read, 70 MHz operation, and 6 ns tV-across the entire voltage window.
Does the AT25XE021A-SSHN-B support true Dual-I/O read mode?
Yes, the AT25XE021A-SSHN-B supports Dual-Output Read using the 0Bh opcode, where both SI (I/O0) and SO (I/O1) pins output data simultaneously on each SCK falling edge. This achieves 2-bit-per-cycle throughput, doubling effective read bandwidth versus standard SPI. The AT25XE021A-SSHN-B requires no external components to enable this mode and maintains full command compatibility with legacy single-I/O hosts via the standard 03h opcode.
How does the AT25XE021A-SSHN-B handle power-down states?
The AT25XE021A-SSHN-B offers two ultra-low-power states: Deep Power-Down (4.5 µA typical) and Ultra-Deep Power-Down (200 nA typical). Entry is controlled via dedicated commands (B9h and 79h); exit requires CS toggle or specific wake sequences. These modes retain full memory contents and status register settings. The AT25XE021A-SSHN-B resumes normal operation within microseconds, making it ideal for intermittent sensing applications.
What security features does the AT25XE021A-SSHN-B provide?
The AT25XE021A-SSHN-B integrates a 128-byte One-Time Programmable (OTP) Security Register with 64 bytes factory-programmed with a unique identifier and 64 bytes user-programmable. It also supports hardware write protection via the WP pin and software-controlled sector locking through status register bits. These features enable secure device serialization, ESN storage, and cryptographic key isolation. The AT25XE021A-SSHN-B enforces protection at both physical and logical levels without requiring external security ICs.
Can the AT25XE021A-SSHN-B be used in industrial temperature environments?
Yes, the AT25XE021A-SSHN-B is rated for the full industrial temperature range of –40 °C to +85 °C. All specifications-including 70 MHz operation, 6 ns tV, 100,000 program/erase cycles, and 20-year data retention-are guaranteed across this range. The AT25XE021A-SSHN-B uses qualified materials and screening processes to ensure reliability in harsh environments such as factory automation controllers, outdoor metering, and transportation infrastructure.
AT25XE021A-SSHN-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-B FAQ
1.How can I place an order for AT25XE021A-SSHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE021A-SSHN-B 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-B reliable?
The price and inventory of AT25XE021A-SSHN-B 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-B is usually 5 days.
3.What payment methods are accepted for AT25XE021A-SSHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE021A-SSHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE021A-SSHN-B?
AT25XE021A-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE021A-SSHN-B 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-B?
For technical support, including AT25XE021A-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE021A-SSHN-B requirements.
6.How does Aetrix verify that AT25XE021A-SSHN-B is sourced from the original manufacturer or authorized distributors?
All AT25XE021A-SSHN-B 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-B meets industry standards.
7.What is the process for return or replacement of AT25XE021A-SSHN-B?
All AT25XE021A-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE021A-SSHN-B, 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-B part is unused and in its original packaging.
Return procedure for AT25XE021A-SSHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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