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Renesas AT25XE021A-XMHN-T
- Part No.:
- AT25XE021A-XMHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25XE021A-XMHN-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,686
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Product details
Overview
AT25XE021A-XMHN-T from Renesas Electronics is a 2-Mbit SPI serial Flash memory IC operating from 1.65 V to 3.6 V, supporting SPI Modes 0/3 and Dual-I/O read operations at up to 70 MHz, with 6 ns clock-to-output delay and hardware write protection via WP pin - used for code shadowing and firmware storage in embedded microcontrollers.
For engineers reviewing the AT25XE021A-XMHN-T datasheet, AT25XE021A-XMHN-T pinout, AT25XE021A-XMHN-T application, or AT25XE021A-XMHN-T equivalent, key selection criteria include dual-I/O bandwidth, ultra-deep power-down current (200 nA), flexible erase granularity (256-byte page to 64-kByte block), OTP security register, and industrial temperature support.
Technical Context
The AT25XE021A-XMHN-T implements a SPI-compatible serial interface with dual-input/dual-output capability, enabling 2-bit-per-clock read and program transfers. Its internal architecture includes SRAM data buffer, Y/X decoders, and control logic managing page/sector/block erase sequencing.
It supports four distinct erase granularities - 256-byte page, 4-kByte block, 32-kByte block, and full chip - each with verified typical times (2 ms, 45 ms, 360 ms, 720 ms). The device integrates hardware-controlled sector locking via WP pin and software-configurable protection registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256 kByte) - sufficient for boot code, firmware images, and configuration data in space-constrained designs. |
| Supply Voltage Range | 1.65 V – 3.6 V - enables direct interfacing with 1.8 V and 3.3 V microcontrollers without level shifting. |
| Max Clock Frequency | 70 MHz - delivers up to 140 MB/s effective read throughput in Dual-I/O mode. |
| Read Latency | 6 ns tV (clock-to-output) - ensures minimal wait states during high-speed instruction fetch or data streaming. |
| Erase Granularity | 256-byte page / 4/32/64-kByte blocks - allows precise firmware patching and log data management without erasing unrelated sectors. |
| Power-Down Current | 200 nA ultra-deep power-down - extends battery life in always-on IoT edge nodes and wearable devices. |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - meets long-life requirements for industrial controllers and automotive ECUs. |
Pinout & Package
AT25XE021A-XMHN-T is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint. Pin functions are fully SPI-compliant and support hold, write protect, and dual-I/O modes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition low before command input and high after operation completion - controls device activation and SO high-impedance state. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI data, falling edge clocks SO data - defines timing for all SPI transactions. |
| SI (I/O0) | Serial Input / Dual-I/O Data Line 0 | Command/address/data input in standard mode; becomes bidirectional I/O0 in Dual-I/O read - enables 2-bit parallel output during fast reads. |
| SO (I/O1) | Serial Output / Dual-I/O Data Line 1 | Data output in standard mode; remains I/O1 in Dual-I/O read - pairs with SI to deliver two bits per SCK falling edge. |
| WP | Write Protect | Hardware lock control; low assertion prevents status register writes and sector protection changes - provides tamper-resistant firmware update safeguard. |
| HOLD | Communication Hold | Pauses ongoing SPI transfer without deselecting device; requires CS low and SCK low to activate - useful for interrupt-driven MCU contexts. |
| VCC | Power Supply | 1.65–3.6 V supply input; powers core logic, memory array, and I/O buffers - no separate programming voltage required. |
| GND | Ground Reference | System ground return path for all internal circuits and I/O signals - must be low-impedance and co-located with VCC decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Support | Enables 2-bit-per-clock data transfer, doubling effective read bandwidth versus standard SPI - critical for real-time firmware execution from flash. |
| Flexible Erase Architecture | Four erase sizes (256 B, 4/32/64 kB) allow optimal partitioning of code and data - reduces wasted space and avoids full-chip erases during field updates. |
| 128-Byte OTP Security Register | Factory-programmed 64-byte unique ID + 64-byte user-programmable space - supports secure device authentication and ESN binding in certified systems. |
| Ultra-Deep Power-Down Mode | 200 nA typical current draw - extends multi-year battery life in maintenance-free sensor nodes and energy-harvesting applications. |
| Hardware Write Protection | WP pin directly disables write/erase commands when asserted - provides fail-safe protection against accidental firmware corruption during power transients. |
Applications
| Industrial PLC Firmware Storage | Automotive Telematics Boot Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires field updates over CAN or Ethernet. IC Role / Device Role / Timing Role: Non-volatile code storage with fast read access and atomic page-level updates to minimize downtime during reprogramming. Use Value: 256-byte page erase enables patching of individual function blocks without disrupting operational logic, while 20-year data retention ensures reliability across 15+ year product lifecycles. | Use Scenario: Holding boot code and secure boot keys for automotive telematics control units (TCUs) operating in -40°C to +105°C environments. IC Role / Device Role / Timing Role: Primary boot memory interfaced to ARM Cortex-A/R cores via SPI, leveraging Dual-I/O mode for sub-100 µs boot time reduction. Use Value: Hardware WP pin and OTP register provide tamper-evident key storage and prevent unauthorized firmware modification - meeting ISO/SAE 21434 cybersecurity requirements. |
| IoT Edge Node Configuration Storage | Medical Wearable Sensor Calibration Data |
Use Scenario: Persisting network credentials, calibration offsets, and OTA update metadata in battery-powered smart meters and environmental sensors. IC Role / Device Role / Timing Role: Low-power data logger memory with deep power-down entry/exit under MCU control, supporting infrequent but reliable writes. Use Value: 200 nA ultra-deep power-down current extends 10-year battery life; 100,000-cycle endurance accommodates daily parameter logging over device lifetime. | Use Scenario: Storing factory-calibrated sensor coefficients and patient-specific thresholds in compact wearable ECG/SpO₂ monitors. IC Role / Device Role / Timing Role: Secure, small-footprint non-volatile memory co-located with analog front-end ASIC, accessed only during initialization. Use Value: 8-lead SOIC package fits tight PCB real estate; OTP register stores immutable calibration constants, preventing runtime corruption or spoofing. |
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 (1 µA typical); supports Quad-I/O but not Dual-I/O specifically optimized. | Limited to 1.7–2.0 V systems; lacks 200 nA power-down mode needed for ultra-low-power IoT. | Select when Quad-I/O bandwidth > Dual-I/O and system voltage is strictly 1.8 V. |
| Micron MT25QL02G | 2 Gbit density (1000× larger); 1.7–2.0 V or 2.7–3.6 V dual supply options; supports Xccela interface, not standard SPI; 2.5 µA deep power-down. | Over-specified capacity and incompatible interface - requires redesign of SPI controller and layout. | Not suitable as drop-in replacement; consider only for new designs requiring higher density and QSPI/Xccela compatibility. |
Compared with W25Q20EW and MT25QL02G, the AT25XE021A-XMHN-T uniquely balances 1.65–3.6 V universal voltage support, 200 nA ultra-deep power-down, and SPI-native Dual-I/O - making it optimal for cost-sensitive, battery-operated, and mixed-voltage embedded systems requiring field-upgradable firmware.
Availability
AT25XE021A-XMHN-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive telematics boot memory, and IoT edge node configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT25XE021A-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.
The AT25XE021A belongs to Renesas' serial Flash memory product line, engineered for high-reliability code and data storage in resource-constrained, low-power, and wide-temperature embedded systems.
FAQ
What is the maximum SPI clock frequency supported by the AT25XE021A-XMHN-T?
The AT25XE021A-XMHN-T supports a maximum operating frequency of 70 MHz in both standard and Dual-I/O read modes. This enables high-throughput data access for real-time firmware execution and rapid configuration loading. The device maintains timing compliance across its full 1.65–3.6 V supply range and industrial temperature grade (-40°C to +85°C), ensuring robust performance in demanding embedded environments. AT25XE021A-XMHN-T's 6 ns clock-to-output delay further minimizes latency during high-speed reads.
Does the AT25XE021A-XMHN-T support hardware write protection?
Yes, the AT25XE021A-XMHN-T includes a dedicated WP (Write Protect) pin that enables hardware-controlled locking of protected memory sectors. When the WP pin is asserted low, it prevents status register writes and sector protection modifications - providing fail-safe protection against accidental firmware corruption. The WP pin is internally pulled-high and can be left floating if unused, though Renesas recommends connecting it to VCC for noise immunity. AT25XE021A-XMHN-T also supports software-based protection via status register bits for fine-grained control.
What erase options does the AT25XE021A-XMHN-T offer, and how do they benefit firmware updates?
The AT25XE021A-XMHN-T offers four erase granularities: 256-byte page, 4-kByte block, 32-kByte block, and full chip. This flexibility allows targeted firmware patches without erasing unrelated code or configuration data - reducing update time and wear on unaffected memory regions. Typical erase times are 2 ms (page), 45 ms (4-kB), 360 ms (32-kB), and 720 ms (chip). AT25XE021A-XMHN-T's architecture eliminates wasted space common with fixed-sector Flash, improving memory utilization efficiency for modular firmware designs.
How does the OTP security register in the AT25XE021A-XMHN-T enhance system security?
The AT25XE021A-XMHN-T integrates a 128-byte One-Time Programmable (OTP) security register: 64 bytes factory-programmed with a unique device identifier and 64 bytes user-programmable. This enables secure device serialization, electronic serial number (ESN) binding, and immutable storage of cryptographic keys or calibration constants. Once programmed, OTP contents cannot be altered - preventing runtime tampering. AT25XE021A-XMHN-T's OTP register is accessible via dedicated SPI commands and operates independently of main array protections, adding a hardware-rooted layer of trust for certified systems.
What power-saving modes does the AT25XE021A-XMHN-T support, and what are their typical current draws?
The AT25XE021A-XMHN-T supports Deep Power-Down (4.5 µA typical) and Ultra-Deep Power-Down (200 nA typical) modes, both entered via SPI command. These modes disable internal circuitry while retaining memory contents, making them ideal for battery-powered applications requiring multi-year operation. Exit times are under 3 µs for Deep Power-Down and ~15 µs for Ultra-Deep Power-Down. AT25XE021A-XMHN-T's ultra-low quiescent current - combined with 25 uA standby and 3 mA active read - delivers best-in-class energy efficiency for always-on edge devices.
AT25XE021A-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:
- 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-TSSOP
AT25XE021A-XMHN-T FAQ
1.How can I place an order for AT25XE021A-XMHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE021A-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 AT25XE021A-XMHN-T reliable?
The price and inventory of AT25XE021A-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 AT25XE021A-XMHN-T is usually 5 days.
3.What payment methods are accepted for AT25XE021A-XMHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE021A-XMHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE021A-XMHN-T?
AT25XE021A-XMHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE021A-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 AT25XE021A-XMHN-T?
For technical support, including AT25XE021A-XMHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE021A-XMHN-T requirements.
6.How does Aetrix verify that AT25XE021A-XMHN-T is sourced from the original manufacturer or authorized distributors?
All AT25XE021A-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 AT25XE021A-XMHN-T meets industry standards.
7.What is the process for return or replacement of AT25XE021A-XMHN-T?
All AT25XE021A-XMHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE021A-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 AT25XE021A-XMHN-T part is unused and in its original packaging.
Return procedure for AT25XE021A-XMHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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