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Renesas AT45DB021E-SHNHA-T
- Part No.:
- AT45DB021E-SHNHA-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB021E-SHNHA-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,022
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Product details
Overview
AT45DB021E-SHNHA-T from Renesas Electronics is a 2-Mbit serial DataFlash memory with extra 64 kbits, operating from 1.65 V to 3.6 V, supporting SPI modes 0 and 3, up to 85 MHz clock rate, and featuring a 256/264-byte SRAM buffer for read-modify-write operations. It delivers 6 ns clock-to-output time, 100,000 program/erase cycles per page, and 20-year data retention - deployed in embedded firmware storage, voice logging, and industrial sensor data buffering.
For engineers reviewing the AT45DB021E-SHNHA-T datasheet, AT45DB021E-SHNHA-T pinout, AT45DB021E-SHNHA-T application, or AT45DB021E-SHNHA-T equivalent, key selection criteria include SPI interface compatibility (RapidS™ enabled), ultra-low deep power-down current (200 nA typ.), configurable 256/264-byte page size, sector lockdown security, and SOIC-8 (150-mil) package suitability for space-constrained PCB layouts.
Technical Context
The AT45DB021E-SHNHA-T implements a dual-buffer architecture with one 256/264-byte SRAM buffer enabling seamless read-modify-write without external RAM. Its sequential-access Flash array (1,024 pages × 256/264 bytes) eliminates address bus overhead and reduces EMI versus parallel NOR/NAND.
RapidS™ mode supports high-frequency continuous array reads at up to 85 MHz using opcode 0Bh, while low-power read mode (opcode 01h) operates at ≤15 MHz with reduced active current. Hardware write protection via WP pin and software-controlled sector lockdown provide layered data integrity for firmware and calibration storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 2,162,688 bits (2 Mbit main + 64 kbit extra), organized as 1,024 pages of 256 or 264 bytes - enables efficient firmware partitioning and byte-alterable E²PROM emulation. |
| Supply voltage | 1.65 V – 3.6 V single supply - supports direct interfacing with 1.8 V and 3.3 V microcontrollers without level shifters. |
| Max clock frequency | 85 MHz (RapidS™ mode) - achieves >10 MB/s sustained read throughput for real-time audio streaming or boot code loading. |
| Power consumption | 200 nA ultra-deep power-down current (typ.) - extends battery life in always-on sensor nodes and IoT edge devices. |
| Endurance & retention | 100,000 program/erase cycles per page minimum; 20 years data retention - suitable for field-upgradable firmware and long-life industrial controllers. |
| Interface standard | SPI-compatible, modes 0 and 3 - ensures interoperability with ARM Cortex-M, RISC-V, and legacy 8-bit MCU families. |
| Security features | 128-byte OTP Security Register (64-byte factory UID + 64-byte user-programmable); sector lockdown - prevents unauthorized firmware modification in certified medical or automotive modules. |
Pinout & Package
AT45DB021E-SHNHA-T is packaged in an 8-lead SOIC (150-mil wide), RoHS-compliant, green plastic body with standard JEDEC footprint. Pin 1 is marked by a notch or dot; pin 1 corner is bottom-left when viewed from top with notch facing left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: initiates command sequence on high-to-low transition; deassertion places SO in high-Z and enters standby (not deep power-down). |
| SCK | Serial Clock | Input clock: latches SI on rising edge; clocks SO on falling edge - defines timing for all SPI transactions including RapidS™ burst reads. |
| SI | Serial Input | Command/address/data input: accepts opcodes (e.g., 0Bh for RapidS™ read), addresses, and buffer write data - ignored when CS is high. |
| SO | Serial Output | Data output: returns memory contents, status register, or security register data - high-impedance when CS is deasserted. |
| WP | Write Protect | Hardware sector lock control: when asserted, blocks program/erase on sectors defined in Sector Protection Register - provides tamper-resistant firmware update guardrails. |
| RESET | Reset Input | Active-low hardware reset: forces device into known state, clears internal status flags, and exits deep power-down - required for safe recovery after brown-out. |
| VCC | Power Supply | 1.65–3.6 V core supply: powers logic, memory array, and I/O buffers - must be stable before CS assertion per power-up timing requirements. |
| GND | Ground | Reference return path: shared analog/digital ground plane required to meet 6 ns tV (clock-to-output) spec and minimize read jitter. |
Key Features
| Feature | Design Value |
|---|---|
| User-configurable page size | Factory-set to 264 bytes (default) or 256 bytes - allows alignment with legacy bootloader page boundaries or optimized wear-leveling algorithms. |
| Program/erase suspend/resume | Enables interrupt-driven background writes: suspend ongoing page program to service high-priority read requests, then resume - critical for real-time HMI and motor control systems. |
| Flexible erase granularity | Page (256/264 B), block (2 kB), sector (32 kB), chip (2 Mbit) - supports partial firmware updates without full reflash, reducing OTA update time and flash wear. |
| Deep power-down modes | Deep Power-Down (3 µA typ.) and Ultra-Deep Power-Down (200 nA typ.) - enables multi-year battery operation in wireless sensor transmitters and smart meters. |
| OTP Security Register | 128-byte one-time programmable area: 64-byte factory UID + 64-byte user space - supports secure key injection, device binding, and anti-cloning in regulated equipment. |
| Continuous array read | Legacy (E8h), RapidS™ (0Bh), low-power (01h/03h) modes - simplifies migration from legacy DataFlash parts while enabling performance scaling in new designs. |
Applications
| Firmware Storage | Voice/Data Logging |
|---|---|
Use Scenario: Storing boot loader, application firmware, and configuration parameters in a resource-constrained industrial PLC. IC Role / Device Role / Timing Role: Non-volatile serial Flash memory providing SPI-based firmware fetch during cold start and over-the-air updates. Use Value: 20-year data retention and 100K endurance ensure reliable operation across 15+ year product lifecycle without field recalls. |
Use Scenario: Capturing ambient temperature/humidity readings every 5 seconds in a battery-powered environmental monitor. IC Role / Device Role / Timing Role: Sequential-access data logger with SRAM buffer enabling atomic page writes and wear-leveling-aware append-only writes. Use Value: Ultra-deep power-down (200 nA) extends CR2032 battery life beyond 3 years while maintaining timestamped data integrity. |
| Secure Calibration Storage | Audio Playback Buffer |
Use Scenario: Storing factory-calibrated sensor offsets and gain coefficients in a medical diagnostic device requiring FDA compliance. IC Role / Device Role / Timing Role: Tamper-proof non-volatile storage using sector lockdown and OTP Security Register for immutable calibration data. Use Value: Sector lockdown prevents post-deployment modification; 64-byte factory UID enables traceability and audit-ready device serialization. |
Use Scenario: Streaming pre-recorded voice prompts and alarm tones in a fire alarm control panel with strict latency requirements. IC Role / Device Role / Timing Role: High-speed sequential read memory delivering continuous audio samples via RapidS™ mode (85 MHz) to DAC interface. Use Value: 6 ns clock-to-output time and continuous array read eliminate audio glitches during emergency tone playback under system load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB021D-SHNHA-T | Predecessor generation; lacks RapidS™ support; max clock 66 MHz; no Ultra-Deep Power-Down (200 nA) mode. | Lower performance and higher power in battery-critical apps; identical pinout and command set for drop-in replacement where speed/power not limiting. | Select AT45DB021D-SHNHA-T only for cost-sensitive legacy designs where 85 MHz and 200 nA are unnecessary. |
| W25Q20EWUXIE | 2 Mbit Quad SPI NOR Flash; supports QSPI x4 interface; 133 MHz clock; no SRAM buffer or read-modify-write capability. | Better raw bandwidth but requires external logic for byte-alterable storage; no built-in E²PROM emulation flow. | Choose W25Q20EWUXIE when system uses QSPI controller and prioritizes read speed over in-situ byte updates. |
Compared with AT45DB021D-SHNHA-T, the AT45DB021E-SHNHA-T adds RapidS™ acceleration and ultra-low power states; versus W25Q20EWUXIE, it trades quad-interface bandwidth for integrated SRAM buffer and native byte-alterable operation - making it optimal for firmware+data hybrid storage in MCU-constrained designs.
Availability
AT45DB021E-SHNHA-T is available at Aetrix Electronics and suitable for industrial control firmware storage, battery-powered sensor logging, and secure medical device calibration requiring stable component supply across extended production lifecycles.
Supply support for AT45DB021E-SHNHA-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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.
The AT45DB021E belongs to Renesas' DataFlash family - engineered for low-pin-count, low-voltage serial Flash applications demanding reliable firmware storage, secure data logging, and embedded E²PROM emulation without external support components.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB021E-SHNHA-T?
The AT45DB021E-SHNHA-T supports up to 85 MHz in RapidS™ mode (using opcode 0Bh), enabling high-throughput continuous array reads. In standard SPI mode, it operates up to 66 MHz. The 6 ns clock-to-output time (tV) is guaranteed across this range, ensuring timing margin for fast microcontroller interfaces. Always verify SCK rise/fall times and board layout per AC characteristics table in the official datasheet.
Does the AT45DB021E-SHNHA-T support true byte-level programming like EEPROM?
No, the AT45DB021E-SHNHA-T does not support direct byte programming. However, it enables E²PROM emulation via a self-contained three-step read-modify-write operation using its internal 256/264-byte SRAM buffer. This allows bit- or byte-alterable storage without external RAM, making it functionally equivalent to EEPROM for small parameter updates while retaining Flash density and cost advantages.
How is sector protection implemented on the AT45DB021E-SHNHA-T?
Sector protection on the AT45DB021E-SHNHA-T is implemented through a dedicated Sector Protection Register (SPR) and hardware WP pin. Software commands (e.g., 36h) configure SPR bits to lock individual 32 kB sectors against program/erase. When WP is asserted, protected sectors become read-only. Sector lockdown (via 3Ch command) makes protection permanent - irreversible even after power cycle - meeting security requirements for calibration and licensing data.
What package type does the AT45DB021E-SHNHA-T use, and is it RoHS compliant?
The AT45DB021E-SHNHA-T uses an 8-lead SOIC package, 150-mil wide (JEDEC MS-012), with gull-wing leads and green (Pb/Halide-free/RoHS compliant) molding compound. Pin 1 is located at the bottom-left corner when viewing the top side with the notch oriented left. This package is compatible with standard reflow profiles and automated assembly processes used in industrial PCB manufacturing.
Can the AT45DB021E-SHNHA-T be used in ultra-low-power battery applications?
Yes - the AT45DB021E-SHNHA-T is specifically designed for ultra-low-power operation, featuring 200 nA typical current in Ultra-Deep Power-Down mode and 3 µA in Deep Power-Down mode. Combined with low-voltage operation (1.65 V min) and rapid wake-up (<100 µs), it enables multi-year battery life in wireless sensors, portable medical devices, and smart utility meters where energy budget is tightly constrained.
AT45DB021E-SHNHA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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:
- 264 Bytes x 1024 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 70 MHz
- Write Cycle Time - Word, Page:
- 8µs, 3ms
- 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
AT45DB021E-SHNHA-T FAQ
1.How can I place an order for AT45DB021E-SHNHA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB021E-SHNHA-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 AT45DB021E-SHNHA-T reliable?
The price and inventory of AT45DB021E-SHNHA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB021E-SHNHA-T is usually 5 days.
3.What payment methods are accepted for AT45DB021E-SHNHA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB021E-SHNHA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB021E-SHNHA-T?
AT45DB021E-SHNHA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB021E-SHNHA-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 AT45DB021E-SHNHA-T?
For technical support, including AT45DB021E-SHNHA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB021E-SHNHA-T requirements.
6.How does Aetrix verify that AT45DB021E-SHNHA-T is sourced from the original manufacturer or authorized distributors?
All AT45DB021E-SHNHA-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 AT45DB021E-SHNHA-T meets industry standards.
7.What is the process for return or replacement of AT45DB021E-SHNHA-T?
All AT45DB021E-SHNHA-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB021E-SHNHA-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 AT45DB021E-SHNHA-T part is unused and in its original packaging.
Return procedure for AT45DB021E-SHNHA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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