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Renesas AT45DB021E-SSHN2B-T
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- Part No.:
- AT45DB021E-SSHN2B-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB021E-SSHN2B-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,469
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Product details
Overview
AT45DB021E-SSHN2B-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, 6 ns max clock-to-output time, and factory-configurable 256/264-byte page size. It integrates one 256/264-byte SRAM buffer and enables E²PROM emulation via read-modify-write for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the AT45DB021E-SSHN2B-T datasheet, AT45DB021E-SSHN2B-T pinout, AT45DB021E-SSHN2B-T application, or AT45DB021E-SSHN2B-T equivalent, key selection criteria include SPI interface compatibility, ultra-low deep power-down current (200 nA), sector lockdown security, continuous array read capability, and industrial temperature support (–40°C to +85°C).
Technical Context
The AT45DB021E-SSHN2B-T implements a dual-buffered serial Flash architecture with dedicated SRAM buffer for temporary data staging and E²PROM-like byte-level updates. Its RapidS™ mode enables high-frequency continuous reads at up to 85 MHz using opcode 0Bh, while low-power read mode (opcode 01h) operates at ≤15 MHz with reduced active current.
Memory organization comprises 1,024 pages of 256 or 264 bytes each (configurable), plus 128-byte OTP security register with 64-byte factory-unique ID and 64-byte user-programmable space. Sector protection and permanent lockdown are enforced via hardware-controlled WP pin and software-accessible registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 2,162,688 bits (2 Mbit main + 64 kbit extra), organized as 1,024 × 256/264-byte pages |
| Supply voltage | 1.65 V – 3.6 V single supply - enables direct interfacing with 1.8 V and 3.3 V MCUs without level shifters |
| Max clock frequency | 85 MHz in RapidS™ mode - supports high-throughput firmware loading and audio streaming |
| Read latency | 6 ns max tV (clock-to-output) - ensures deterministic timing for real-time control loops |
| Power-down current | 200 nA typical ultra-deep power-down - extends battery life in always-on sensor nodes |
| Endurance & retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-upgradable industrial firmware |
| Operating temperature | –40°C to +85°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
AT45DB021E-SSHN2B-T uses an 8-lead SOIC 150-mil wide package (JEDEC MS-012AA). All pins are electrically defined and validated per Renesas DS-AT45DB021E-8789 Rev. N.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high→low to initiate command, low→high to terminate; requires 10 kΩ pull-up to VCC for reliable power-up sequencing |
| SCK | Serial Clock | Input clock; commands/address/data latched on rising edge; SO output timed to falling edge - defines SPI timing compliance |
| SI | Serial Input | Command, address, and input data entry point; ignored when CS is deasserted |
| SO | Serial Output | Data output; high-impedance when CS is deasserted - allows multi-device SPI bus sharing |
| WP | Write Protect | Hardware sector lock control; assertion blocks program/erase on protected sectors regardless of software state |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to known state without power cycle |
| VCC | Power Supply | 1.65–3.6 V supply; powers core logic, I/O, and internal charge pump for erase/program |
| GND | Ground | Reference return path; DFN variant includes exposed thermal pad (NC or GND) |
Key Features
| Feature | Design Value |
|---|---|
| RapidS™ high-speed read | Enables 85 MHz continuous array reads (0Bh opcode), doubling throughput vs. legacy E8h command |
| User-configurable page size | Factory-set to 264 bytes (default) or 256 bytes - optimizes alignment for MCU DMA buffers or legacy file systems |
| Program/erase suspend/resume | Allows interruption of long erase cycles (e.g., 32 kB sector erase) to service urgent read requests - critical for real-time systems |
| OTP Security Register | 128-byte register with 64-byte factory-unique ID and 64-byte user space - supports secure boot key storage and device binding |
| Sector lockdown | Irreversible hardware-enforced read-only lock on any sector - prevents accidental or malicious firmware overwrite in production units |
Applications
| Industrial Firmware Storage | Medical Device Data Logging |
|---|---|
Use Scenario: Storing and updating bootloader and application firmware in programmable logic controllers (PLCs) with field upgrade capability. IC Role / Device Role / Timing Role: Non-volatile code storage with E²PROM emulation; provides byte-alterable memory via internal read-modify-write without external EEPROM. Use Value: Eliminates need for separate EEPROM, reduces BOM count, and enables safe over-the-air updates with sector protection preventing corruption during power loss. | Use Scenario: Capturing timestamped physiological waveforms (ECG, SpO₂) in portable diagnostic devices between wireless uploads. IC Role / Device Role / Timing Role: High-reliability sequential data buffer with ultra-low deep power-down (200 nA) to extend battery runtime during standby. Use Value: Sustains >6 months operation on coin-cell battery while preserving waveform integrity across 100,000 write cycles per sector. |
| Automotive Infotainment UI Assets | Smart Meter Firmware Vault |
Use Scenario: Hosting GUI bitmaps, fonts, and localization strings in automotive head units where display content updates infrequently but must survive ignition cycles. IC Role / Device Role / Timing Role: SPI-connected asset repository; leverages continuous array read (0Bh) for rapid bitmap streaming to graphics controller. Use Value: Delivers 85 MHz read bandwidth to avoid frame drops during UI animation, while sector lockdown prevents unauthorized UI tampering. | Use Scenario: Securing meter calibration constants and cryptographic keys in ANSI C12.19-compliant utility meters deployed in unattended outdoor locations. IC Role / Device Role / Timing Role: Tamper-resistant configuration vault; uses OTP security register and hardware WP pin for physical write protection. Use Value: Meets ANSI/IEEE 1377 security requirements via irreversible sector lockdown and factory-programmed unique ID for device attestation. |
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-SSHN2B | Predecessor generation; lacks RapidS™ mode, max clock 66 MHz, no ultra-deep power-down (200 nA) | Lower performance read throughput; unsuitable for high-speed streaming or ultra-low-power wake-on-event designs | Select only if legacy design reuse mandates identical timing margins and no new feature adoption |
| W25Q20EWUXIE | Quad SPI interface, 133 MHz max, 1.65–1.95 V supply only, no integrated SRAM buffer or E²PROM emulation logic | Requires external controller logic for byte-alterable writes; better suited for pure code XIP than data logging | Choose when higher density (2 Mbit) and quad I/O bandwidth outweigh need for self-contained read-modify-write |
Compared with AT45DB021D-SSHN2B and W25Q20EWUXIE, the AT45DB021E-SSHN2B-T uniquely combines RapidS™ speed, ultra-low power-down, and hardware-accelerated E²PROM emulation - making it optimal for resource-constrained, battery-powered, and safety-critical firmware storage where reliability and simplicity are prioritized over raw density or quad interface bandwidth.
Availability
AT45DB021E-SSHN2B-T is available at Aetrix Electronics and suitable for industrial firmware storage, medical data logging, automotive UI assets, and smart meter firmware vault applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB021E-SSHN2B-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 markets.
The AT45DB021E-SSHN2B-T belongs to Renesas' DataFlash® family, designed specifically for embedded systems needing reliable, low-pin-count, low-voltage serial Flash with built-in E²PROM emulation and robust security features.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB021E-SSHN2B-T?
The AT45DB021E-SSHN2B-T supports up to 85 MHz in RapidS™ mode (using opcode 0Bh), which is its highest operational speed. In standard SPI mode, it operates up to 66 MHz. The 85 MHz capability enables high-bandwidth firmware transfers and real-time audio data streaming without requiring parallel interfaces or external buffering. This specification is confirmed in the AC Characteristics table (Section 20.4) of the official Renesas datasheet DS-AT45DB021E-8789 Rev. N.
Does the AT45DB021E-SSHN2B-T support true byte-level writes like EEPROM?
Yes, the AT45DB021E-SSHN2B-T supports E²PROM emulation through a self-contained three-step read-modify-write operation, enabling true byte- or word-level alterations without erasing full pages. This is implemented using its integrated 256/264-byte SRAM buffer and dedicated command set (e.g., Main Memory Page to Buffer Transfer, Buffer Write, Buffer to Main Memory Page Program). Unlike standard Flash, this eliminates the need for external EEPROM in applications requiring frequent small-data updates, such as configuration storage or event counters.
How does sector lockdown work on the AT45DB021E-SSHN2B-T, and is it reversible?
Sector lockdown on the AT45DB021E-SSHN2B-T is a hardware-enforced, irreversible security feature that permanently sets a sector to read-only. Once activated via the Sector Lockdown command (opcode 3AH), the sector cannot be reprogrammed or erased-even by removing power or issuing a reset. The lockdown status is stored in nonvolatile register bits and survives power cycles. This feature is distinct from software sector protection and provides tamper resistance for critical firmware or calibration data. The AT45DB021E-SSHN2B-T datasheet explicitly states lockdown is "permanent" and "cannot be undone."
What package type is used by the AT45DB021E-SSHN2B-T, and what does the 'SSHN2B' suffix indicate?
The AT45DB021E-SSHN2B-T uses an 8-lead SOIC package, 150-mil wide (JEDEC MS-012AA), with lead finish of matte tin. The 'SSHN2B' suffix decodes as: SS = SOIC narrow (150-mil), H = lead-free (Pb/Halide-free/RoHS compliant), N = tape-and-reel packaging, 2B = specific assembly and test revision. This package is verified in Section 30.1 of the Renesas datasheet and is compatible with standard SOIC-8 PCB footprints and reflow profiles.
Can the AT45DB021E-SSHN2B-T operate reliably at 1.65 V, and what are the trade-offs?
Yes, the AT45DB021E-SSHN2B-T is fully specified to operate down to 1.65 V across the industrial temperature range (–40°C to +85°C), as stated in the Absolute Maximum Ratings and DC Operating Range sections. At minimum voltage, maximum clock frequency is reduced to 33 MHz in RapidS™ mode, and deep power-down current remains at 200 nA typical. All timing parameters, including tV (6 ns max), are guaranteed across the full voltage range. This enables direct integration with 1.8 V microcontrollers without level-shifting circuitry.
AT45DB021E-SSHN2B-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:
- 256 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-SSHN2B-T FAQ
1.How can I place an order for AT45DB021E-SSHN2B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB021E-SSHN2B-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-SSHN2B-T reliable?
The price and inventory of AT45DB021E-SSHN2B-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-SSHN2B-T is usually 5 days.
3.What payment methods are accepted for AT45DB021E-SSHN2B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB021E-SSHN2B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB021E-SSHN2B-T?
AT45DB021E-SSHN2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB021E-SSHN2B-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-SSHN2B-T?
For technical support, including AT45DB021E-SSHN2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB021E-SSHN2B-T requirements.
6.How does Aetrix verify that AT45DB021E-SSHN2B-T is sourced from the original manufacturer or authorized distributors?
All AT45DB021E-SSHN2B-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-SSHN2B-T meets industry standards.
7.What is the process for return or replacement of AT45DB021E-SSHN2B-T?
All AT45DB021E-SSHN2B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB021E-SSHN2B-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-SSHN2B-T part is unused and in its original packaging.
Return procedure for AT45DB021E-SSHN2B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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