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Renesas AT45DB021E-SHNHC-T
- Part No.:
- AT45DB021E-SHNHC-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB021E-SHNHC-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,126
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Product details
Overview
AT45DB021E-SHNHC-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, RapidS™ high-speed interface up to 85 MHz, and featuring one 256/264-byte SRAM buffer. It enables byte/page programming, flexible erase (page/block/sector/chip), and is used in embedded firmware storage, voice recording systems, and industrial data loggers where low-pin-count, low-power nonvolatile memory is critical.
For engineers reviewing the AT45DB021E-SHNHC-T datasheet, AT45DB021E-SHNHC-T pinout, AT45DB021E-SHNHC-T application, or AT45DB021E-SHNHC-T equivalent, key selection criteria include its 256/264-byte configurable page size, ultra-deep power-down current (200 nA typical), hardware/software sector protection, OTP security register, and SOIC-8 (150-mil) packaging - all confirmed for this specific orderable variant.
Technical Context
The AT45DB021E-SHNHC-T implements a dual-buffer architecture with one main memory array (1,024 pages × 256/264 bytes) and one dedicated SRAM buffer of matching size. Its sequential-access Flash design eliminates parallel address/data buses, relying instead on SPI command sequences for read, program, and erase operations - including continuous array read (0Bh/03h/01h opcodes), buffer-to-main-memory transfer, and auto page rewrite.
It integrates advanced data integrity features: individual sector lockdown (permanent read-only), 128-byte OTP security register (64-byte factory UID + 64-byte user-programmable), and status register monitoring. Power management includes Deep Power-Down (3 µA typical) and Ultra-Deep Power-Down (200 nA typical), both resumable via CS toggle or RESET assertion.
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 - supports firmware image storage with byte-alterable E²PROM emulation via read-modify-write. |
| Supply Voltage | 1.65 V to 3.6 V single supply - enables direct interfacing with 1.8 V and 3.3 V microcontrollers without level shifters. |
| Max Clock Frequency | 85 MHz (RapidS™ mode) - delivers sustained high-throughput sequential reads for audio/video buffering. |
| Power-Down Current | 200 nA typical (Ultra-Deep Power-Down) - extends battery life in always-on sensor nodes and portable medical devices. |
| Endurance & Retention | 100,000 program/erase cycles per page minimum; 20 years data retention - suitable for field-upgradable industrial controllers. |
| Page Size Config | User-configurable at power-up; factory pre-configurable for 256 or 264 bytes - determines addressing alignment and buffer usage efficiency. |
| Security Features | 128-byte OTP Security Register (64-byte UID + 64-byte user space); sector lockdown; hardware/software sector protection - meets basic secure boot and anti-cloning requirements. |
Pinout & Package
AT45DB021E-SHNHC-T is packaged in an 8-lead SOIC, 150-mil wide (JEDEC standard), with exposed pad not internally connected. Pin functions are fully compatible across SOIC, DFN, and WLCSP variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition low-to-high to complete commands; requires 10 kΩ pull-up to VCC for robust power-up sequencing. |
| SCK | Serial Clock | Input clock; rising edge latches SI data; falling edge clocks SO data - supports SPI modes 0 and 3 timing. |
| SI | Serial Input | Command/address/data input; ignored when CS is high - enables compact command opcode + address streaming. |
| SO | Serial Output | Data output; high-impedance when CS is high - allows multi-drop SPI bus sharing with proper CS decoding. |
| WP | Write Protect | Active-low hardware lock; protects configured sectors from accidental program/erase - complements software sector protection. |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to known state without power cycle - critical for recovery after brown-out. |
| VCC | Power Supply | 1.65–3.6 V supply; powers core logic and I/O - supports mixed-voltage system integration. |
| GND | Ground | Reference return path; decoupling capacitor (0.1 µF) required near VCC/GND pins for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| RapidS™ High-Speed Interface | Enables 85 MHz continuous read throughput - reduces firmware load time by >3× vs. standard SPI Flash at same voltage. |
| Configurable Page Size (256/264 bytes) | Allows optimization for legacy binary alignment (256) or DataFlash-optimized ECC overhead (264) without changing hardware layout. |
| SRAM Buffer with Read-Modify-Write | One 256/264-byte buffer enables true byte-level updates in Flash - eliminates need for external RAM during firmware patching. |
| Multi-Level Erase Granularity | Page (256/264 B), block (2 kB), sector (32 kB), and chip (2 Mbit) erase options - balances update speed, wear leveling, and system responsiveness. |
| Hardware Sector Lockdown | Makes any sector permanently read-only after freeze command - prevents unauthorized modification of bootloader or calibration data. |
| Ultra-Low Power Modes | 200 nA Ultra-Deep Power-Down current - enables >10-year battery life in IoT endpoint nodes with infrequent wake-ups. |
Applications
| Firmware Storage | Voice/Data Logging |
|---|---|
|
Use Scenario: Storing and updating microcontroller boot code and application firmware in industrial PLCs. IC Role / Device Role / Timing Role: Nonvolatile program memory accessed via SPI during cold start and OTA updates. Use Value: 100,000-cycle endurance and 20-year retention ensure reliable field upgrades over product lifetime without replacement. |
Use Scenario: Capturing sensor readings or voice snippets in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Sequential write buffer with low-power Deep Power-Down between logging intervals. Use Value: 200 nA Ultra-Deep Power-Down current extends coin-cell battery life to >5 years at 1-minute sampling intervals. |
| Secure Bootloader Storage | Medical Device Configuration |
|
Use Scenario: Holding immutable bootloader code and cryptographic keys in Class II medical instruments. IC Role / Device Role / Timing Role: Protected memory region enforced by hardware sector lockdown and OTP register. Use Value: Freeze-enabled sector lockdown prevents runtime tampering, satisfying IEC 62304 traceability requirements. |
Use Scenario: Storing calibrated sensor offsets, patient history templates, and UI language packs in portable diagnostics tools. IC Role / Device Role / Timing Role: User-programmable configuration store accessed during device initialization. Use Value: 64-byte user space in OTP Security Register provides tamper-resistant storage for unique calibration data per unit. |
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-SHNHC-T | Previous revision; lacks RapidS™ support; max clock 66 MHz; no Ultra-Deep Power-Down (only Deep Power-Down at 3 µA). | Lower performance and higher standby current - suitable only for cost-sensitive legacy designs without high-speed or ultra-low-power needs. | Select only if RapidS™ and 200 nA power-down are not required; verify pinout and command compatibility before substitution. |
| W25Q20EWUXIE | 2 Mbit Quad SPI Flash; 133 MHz QPI mode; 1.65–1.95 V supply only; no SRAM buffer or read-modify-write capability. | Higher bandwidth but no E²PROM emulation; requires external logic for byte updates; incompatible command set and protection model. | Choose for raw throughput in new designs with Quad SPI host support; avoid where buffer-based byte programming or sector lockdown is mandatory. |
Compared with AT45DB021D-SHNHC-T, the AT45DB021E-SHNHC-T adds RapidS™ acceleration and ultra-low-power states; versus W25Q20EWUXIE, it trades Quad SPI speed for integrated SRAM buffer and hardware-assisted byte-alterability - making it uniquely suited for firmware patching and secure configuration storage.
Availability
AT45DB021E-SHNHC-T is available at Aetrix Electronics and suitable for industrial control systems, portable medical instrumentation, and battery-powered IoT endpoints requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB021E-SHNHC-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, and IoT applications.
The AT45DB021E belongs to Renesas' DataFlash family, designed specifically for systems needing sequential-access Flash with integrated SRAM buffers, low-voltage operation, and robust data integrity features - targeting embedded firmware, voice, and secure configuration storage.
FAQ
What is the page size configuration for AT45DB021E-SHNHC-T?
The AT45DB021E-SHNHC-T supports user-configurable page sizes of either 256 bytes or 264 bytes, selected at power-up via internal configuration bits. Factory pre-configuration is also possible; the default is 264 bytes. This setting directly affects addressing, buffer usage, and compatibility with legacy DataFlash drivers - always verify page size in the status register before issuing page-program commands. The AT45DB021E-SHNHC-T datasheet confirms both configurations are supported for this exact part number.
Does AT45DB021E-SHNHC-T support true byte-level writes without external RAM?
Yes. The AT45DB021E-SHNHC-T implements a self-contained read-modify-write operation using its internal 256/264-byte SRAM buffer. This allows single-byte or partial-page updates to main memory without external memory or host-side buffering. The process is initiated via dedicated commands (e.g., Main Memory Page to Buffer Transfer → Buffer Modify → Buffer to Main Memory Page Program). This capability is intrinsic to the AT45DB021E-SHNHC-T architecture and documented in Section 8.10 of its datasheet.
What is the difference between Deep Power-Down and Ultra-Deep Power-Down in AT45DB021E-SHNHC-T?
AT45DB021E-SHNHC-T offers two ultra-low-power states: Deep Power-Down draws 3 µA typical and retains memory contents; Ultra-Deep Power-Down draws only 200 nA typical but requires a full power cycle or RESET assertion to resume - it does not retain volatile status bits. Both modes disable internal clocks and place I/O pins in high-Z. The choice depends on wake-up latency tolerance: use Deep Power-Down for fast (<100 µs) wake-up; Ultra-Deep for maximum battery life in intermittently active systems. This behavior is specified for AT45DB021E-SHNHC-T in Sections 12.1 and 12.2.
Can AT45DB021E-SHNHC-T be used as a drop-in replacement for AT45DB021D-SHNHC-T?
No - AT45DB021E-SHNHC-T is not a pin-compatible or functional drop-in replacement for AT45DB021D-SHNHC-T. While pinout and package match, the AT45DB021E-SHNHC-T introduces RapidS™ commands, Ultra-Deep Power-Down, and updated status register bits. Host firmware must be updated to handle new opcodes (e.g., 0Bh for RapidS read) and revised power-down/resume sequences. Always validate command compatibility and timing margins before migration. The AT45DB021E-SHNHC-T datasheet explicitly documents these differences in Revision History and Command Tables.
How is sector protection implemented in AT45DB021E-SHNHC-T?
AT45DB021E-SHNHC-T implements dual-sector protection: software-controlled via the Sector Protection Register (readable/writable via 32h/36h opcodes), and hardware-enforced via the WP pin. Sectors can be individually locked against program/erase; lockdown makes protection permanent after freeze command. The 128-byte OTP Security Register stores factory UID and user data, independent of sector protection. All protection mechanisms are active and verified for AT45DB021E-SHNHC-T in Sections 9 and 10 of its official datasheet.
AT45DB021E-SHNHC-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-SHNHC-T FAQ
1.How can I place an order for AT45DB021E-SHNHC-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB021E-SHNHC-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-SHNHC-T reliable?
The price and inventory of AT45DB021E-SHNHC-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-SHNHC-T is usually 5 days.
3.What payment methods are accepted for AT45DB021E-SHNHC-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB021E-SHNHC-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB021E-SHNHC-T?
AT45DB021E-SHNHC-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB021E-SHNHC-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-SHNHC-T?
For technical support, including AT45DB021E-SHNHC-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB021E-SHNHC-T requirements.
6.How does Aetrix verify that AT45DB021E-SHNHC-T is sourced from the original manufacturer or authorized distributors?
All AT45DB021E-SHNHC-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-SHNHC-T meets industry standards.
7.What is the process for return or replacement of AT45DB021E-SHNHC-T?
All AT45DB021E-SHNHC-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB021E-SHNHC-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-SHNHC-T part is unused and in its original packaging.
Return procedure for AT45DB021E-SHNHC-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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