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Renesas AT45DB021E-SSHNHC-T
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- Part No.:
- AT45DB021E-SSHNHC-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB021E-SSHNHC-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,729
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Product details
Overview
AT45DB021E-SSHNHC-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 264-byte page size (default), one 256/264-byte SRAM buffer, and continuous array read capability. It is used in embedded firmware storage, voice logging, and boot code retention where low-pin-count, low-power, and in-system reprogrammability are critical.
For engineers reviewing the AT45DB021E-SSHNHC-T datasheet, AT45DB021E-SSHNHC-T pinout, AT45DB021E-SSHNHC-T application, or AT45DB021E-SSHNHC-T equivalent, this page delivers verified electrical specs, SPI command behavior, sector protection configuration, power-down current values, and real-world use cases for industrial control, medical data loggers, and IoT edge nodes.
Technical Context
The AT45DB021E-SSHNHC-T implements a dual-buffered serial Flash architecture with one main memory array (1,024 × 256/264 bytes) and one dedicated SRAM buffer. Its RapidS™ interface enables high-speed continuous reads using opcode 0Bh, achieving ≤6 ns clock-to-output time while maintaining full SPI mode 0/3 compatibility.
It supports three erase granularities-page (256/264 B), block (2 kB), and sector (32 kB)-with built-in suspend/resume for program/erase operations. Sector lockdown, 128-byte OTP security register, and hardware/software write protection (via WP pin and status register) 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 |
| Supply voltage | 1.65 V – 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); enables >10 MB/s sustained read throughput for firmware streaming |
| Power consumption | 200 nA ultra-deep power-down current (typical); supports battery-backed operation in always-on sensor nodes |
| Endurance & retention | 100,000 program/erase cycles per page minimum; 20-year data retention at 85°C |
| Page size | User-configurable: factory-set to 264 bytes (default) or 256 bytes; determines address alignment and buffer usage efficiency |
| Security features | 128-byte OTP security register (64-byte factory UID + 64-byte user-programmable); sector lockdown makes protected sectors permanently read-only |
Pinout & Package
AT45DB021E-SSHNHC-T is packaged in an 8-lead SOIC 208-mil wide (EIAJ standard), with exposed pad not internally connected - may be left floating or tied to GND for thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition low before command input and high after completion; pull-up to VCC required for reliable power-up sequencing |
| SCK | Serial Clock | Input clock; rising edge latches SI data; falling edge clocks SO data; supports up to 85 MHz in RapidS™ mode |
| SI | Serial Input | Command/address/data input; ignored when CS is high; compatible with standard SPI master output drivers |
| SO | Serial Output | Data output; high-impedance when CS is high; timing-critical path with 6 ns max tV (clock-to-output) |
| WP | Write Protect | Hardware sector lock control; assertion disables program/erase on sectors enabled in Sector Protection Register |
| RESET | Reset Input | Active-low asynchronous reset; returns device to known state without power cycle; required for recovery after bus errors |
| VCC | Power Supply | 1.65–3.6 V supply; powers core logic, I/O, and internal charge pump for erase/program |
| GND | Ground | Reference for all signals and supply; must be low-impedance connection to minimize noise coupling into SO/SI paths |
Key Features
| Feature | Design Value |
|---|---|
| RapidS™ high-speed read | Enables continuous array reads at 85 MHz using opcode 0Bh, reducing firmware load latency by >3× vs legacy E8h command |
| Flexible erase granularity | Supports page (256/264 B), block (2 kB), and sector (32 kB) erase - allows fine-grained updates without disturbing adjacent firmware sections |
| SRAM buffer + read-modify-write | Single 256/264-byte buffer enables EEPROM-like byte-alterability via self-contained three-step operation (read → modify → write) |
| Deep power-down modes | Ultra-deep power-down draws only 200 nA (typ), enabling multi-year battery life in maintenance-free remote sensors |
| Hardware sector lockdown | Once enabled, locked sectors become permanently read-only - prevents accidental or malicious overwrite of bootloader or calibration data |
| JEDIC ID & OTP security register | JEDEC-standard manufacturer/device ID (0x1F 0x84) plus 128-byte OTP register with factory-assigned 64-byte UID for secure device authentication |
Applications
| Firmware Storage | Voice/Data Logging |
|---|---|
Use Scenario: Storing boot code and application firmware in a resource-constrained MCU-based industrial controller. IC Role / Device Role / Timing Role: Non-volatile sequential storage accessed via SPI during cold start and OTA updates. Use Value: 264-byte page size and RapidS™ read reduce boot time by enabling fast instruction fetch; sector lockdown protects bootloader from corruption. |
Use Scenario: Capturing audio snippets or sensor readings in a battery-powered environmental monitor. IC Role / Device Role / Timing Role: Circular buffer for time-stamped data with in-field reprogramming capability. Use Value: Ultra-deep power-down (200 nA) extends battery life to >5 years; page erase minimizes wear during frequent small-data writes. |
| Medical Device Calibration | IoT Edge Node Configuration |
Use Scenario: Retaining factory-calibrated sensor coefficients and safety-critical thresholds in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for immutable parameters accessed at system initialization. Use Value: Sector lockdown + OTP security register ensure calibration data cannot be altered post-manufacture - meets IEC 62304 traceability requirements. |
Use Scenario: Holding network credentials, device identity, and firmware update metadata in a cellular-connected smart meter. IC Role / Device Role / Timing Role: Trusted configuration store with hardware write protection activated during normal operation. Use Value: WP pin control and software sector protection prevent unauthorized credential changes during field deployment or firmware updates. |
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 Quad SPI NOR Flash; 133 MHz max clock; no SRAM buffer or RapidS™; requires 4-wire interface | Lacks read-modify-write and continuous array read; better suited for XIP execution than sequential logging | Select if system requires QSPI interface and higher random read speed, but accept loss of EEPROM emulation and simpler erase control |
| Macronix MX25L2006E | 2 Mbit standard SPI NOR Flash; 80 MHz max clock; no OTP register or sector lockdown; 256-byte page only | No hardware-level permanent write protection; limited security features for regulated medical or industrial use | Choose for cost-sensitive designs where basic firmware storage suffices and advanced data integrity controls are unnecessary |
Compared with W25Q20EW and MX25L2006E, the AT45DB021E-SSHNHC-T uniquely combines SRAM-buffered read-modify-write, sector lockdown, and RapidS™-enabled high-throughput sequential access - making it optimal for systems requiring both firmware storage and secure, field-updatable parameter retention.
Availability
AT45DB021E-SSHNHC-T is available at Aetrix Electronics and suitable for industrial control systems, medical data loggers, and IoT edge nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB021E-SSHNHC-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-SSHNHC-T belongs to Renesas' DataFlash family - designed specifically for systems needing reliable, low-voltage, low-pin-count serial Flash with integrated buffer and robust data protection for embedded firmware and critical parameter storage.
FAQ
What is the default page size of the AT45DB021E-SSHNHC-T?
The AT45DB021E-SSHNHC-T ships with a default page size of 264 bytes. This value is factory-configured but can be changed to 256 bytes using the Buffer and Page Size Configuration command (0x3D). The selected size affects addressing, buffer usage, and command compatibility - all AT45DB021E-SSHNHC-T operations must align with the active page size.
Does the AT45DB021E-SSHNHC-T support true EEPROM emulation?
Yes, the AT45DB021E-SSHNHC-T supports EEPROM emulation via its built-in SRAM buffer and read-modify-write command sequence (0xD8). This allows byte- or bit-level alterations without erasing full pages - a key capability absent in standard SPI NOR Flash. The AT45DB021E-SSHNHC-T executes the entire operation autonomously, eliminating host MCU overhead.
How does the WP pin function on the AT45DB021E-SSHNHC-T?
The WP (Write Protect) pin on the AT45DB021E-SSHNHC-T provides hardware-level sector protection. When asserted low, it disables program and erase operations on sectors enabled in the Sector Protection Register. Unlike software-only protection, WP remains effective even after power cycles - ensuring AT45DB021E-SSHNHC-T retains its protected state across resets and brownouts.
What is the purpose of the 128-byte OTP security register in the AT45DB021E-SSHNHC-T?
The 128-byte OTP (One-Time Programmable) security register in the AT45DB021E-SSHNHC-T contains 64 bytes pre-programmed with a unique device identifier and 64 bytes available for user programming. Once written, OTP bytes cannot be altered - making them ideal for storing cryptographic keys, device certificates, or calibration signatures that must remain immutable throughout the AT45DB021E-SSHNHC-T's lifetime.
Can the AT45DB021E-SSHNHC-T operate at 1.8 V supply?
Yes, the AT45DB021E-SSHNHC-T is fully specified to operate from 1.65 V to 3.6 V. At 1.8 V, it maintains full functionality including 85 MHz RapidS™ read, program/erase operations, and deep power-down modes. This makes the AT45DB021E-SSHNHC-T compatible with modern ultra-low-power MCUs and battery-powered systems without external voltage translation.
AT45DB021E-SSHNHC-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:
- 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-SSHNHC-T FAQ
1.How can I place an order for AT45DB021E-SSHNHC-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB021E-SSHNHC-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-SSHNHC-T reliable?
The price and inventory of AT45DB021E-SSHNHC-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-SSHNHC-T is usually 5 days.
3.What payment methods are accepted for AT45DB021E-SSHNHC-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB021E-SSHNHC-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB021E-SSHNHC-T?
AT45DB021E-SSHNHC-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB021E-SSHNHC-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-SSHNHC-T?
For technical support, including AT45DB021E-SSHNHC-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB021E-SSHNHC-T requirements.
6.How does Aetrix verify that AT45DB021E-SSHNHC-T is sourced from the original manufacturer or authorized distributors?
All AT45DB021E-SSHNHC-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-SSHNHC-T meets industry standards.
7.What is the process for return or replacement of AT45DB021E-SSHNHC-T?
All AT45DB021E-SSHNHC-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB021E-SSHNHC-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-SSHNHC-T part is unused and in its original packaging.
Return procedure for AT45DB021E-SSHNHC-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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