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Renesas AT45DB021E-SSHNHA-T
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- Part No.:
- AT45DB021E-SSHNHA-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB021E-SSHNHA-T.pdf
- Description:
- IC FLASH 2MBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,784
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Product details
Overview
AT45DB021E-SSHNHA-T from Renesas Electronics is a 2-Mbit DataFlash serial flash 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 enables embedded firmware storage and voice/data logging in space-constrained industrial controllers.
For engineers reviewing the AT45DB021E-SSHNHA-T datasheet, AT45DB021E-SSHNHA-T pinout, AT45DB021E-SSHNHA-T application, or AT45DB021E-SSHNHA-T equivalent, this page delivers verified electrical specs, package mapping (8-pad UDFN, 5 × 6 × 0.6 mm), sector protection behavior, RapidS™ timing compliance, and real-world use-value for firmware update resilience and low-power data logging.
Technical Context
The AT45DB021E-SSHNHA-T implements a dual-buffered sequential-access architecture: one main memory array (1,024 pages × 256/264 bytes) and one dedicated 256/264-byte SRAM buffer. It supports three distinct read modes-Legacy (E8h), High-Frequency (0Bh), and Low-Power (01h/03h)-with tV ≤ 6 ns clock-to-output delay.
Its erase hierarchy includes Page (256/264 B), Block (2 kB), Sector (32 kB), and Chip (2 Mbit) levels, all self-timed and suspend/resume capable. Sector lockdown and 128-byte OTP security register provide hardware-enforced write protection and device identity binding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,162,688 bits (2 Mbit main + 64 kbit extra), organized as 1,024 pages of 256 or 264 bytes - enables flexible firmware partitioning and E2PROM emulation via buffer-assisted read-modify-write. |
| Supply Voltage | 1.65 V to 3.6 V single supply - supports direct interfacing with 1.8 V and 3.3 V microcontrollers without level-shifting. |
| Max Clock Frequency | 85 MHz (RapidS™ mode) - achieves sustained high-throughput sequential reads for audio streaming or boot code loading. |
| Power Consumption | 200 nA ultra-deep power-down current (typical) - extends battery life in always-on sensor nodes during idle periods. |
| Endurance & Retention | 100,000 program/erase cycles per page minimum; 20-year data retention - suitable for field-upgradable industrial firmware with infrequent but critical updates. |
| Interface Protocol | SPI-compatible, modes 0 and 3 only - ensures interoperability with standard MCU SPI peripherals without custom timing logic. |
| Page Erase Time | Typical 5 ms - enables fast partial reprogramming during over-the-air updates without full chip erase delays. |
Pinout & Package
AT45DB021E-SSHNHA-T uses an 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm) with exposed thermal pad (no internal connection; may be left floating or tied to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high→low to initiate command, low→high to terminate - controls device selection and SO high-impedance state. |
| SCK | Serial Clock | Input clock; SI data latched on rising edge, SO data output on falling edge - defines strict SPI timing alignment for reliable communication. |
| SI | Serial Input | Command/address/data input line; ignored when CS is deasserted - carries all instruction opcodes and address bytes. |
| SO | Serial Output | Data output line; tri-stated when CS is high - delivers memory contents, status registers, or security data synchronously with SCK. |
| WP | Write Protect | Hardware sector lock control; asserted = protected sectors immune to program/erase - provides fail-safe firmware integrity during brown-out conditions. |
| RESET | Reset Input | Active-low hardware reset; forces device into known state and clears status flags - essential for recovery after SPI bus contention or power glitch. |
| VCC | Power Supply | 1.65–3.6 V core supply; powers logic, memory array, and I/O buffers - requires local 100 nF decoupling per datasheet layout guidelines. |
| GND | Ground | Reference return path for VCC and all I/O signals - must be low-impedance; DFN thermal pad may be connected to GND plane for thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| RapidS™ High-Speed Mode | Enables 85 MHz continuous read throughput with deterministic 6 ns tV - eliminates wait states in real-time audio playback systems. |
| User-Configurable Page Size | Factory-set to 264 bytes (default) or 256 bytes - allows optimization for legacy 256-byte-aligned bootloader compatibility or enhanced payload efficiency. |
| SRAM Buffer with Read-Modify-Write | Single 256/264-byte buffer supports atomic byte-level updates without external RAM - enables robust parameter storage in medical device calibration tables. |
| Multi-Level Sector Protection | Software/hardware configurable per-sector lockdown and 128-byte OTP register - prevents unauthorized firmware modification in certified industrial equipment. |
| Ultra-Low Power States | 200 nA ultra-deep power-down and 25 µA standby @ 20 MHz - meets energy budget constraints in battery-powered IoT edge nodes. |
Applications
| Firmware Storage | Voice/Data Logging |
|---|---|
Use Scenario: Storing boot code and application firmware for ARM Cortex-M4-based motor drives with field upgrade capability. IC Role / Device Role / Timing Role: Serial Flash memory providing non-volatile storage for executable code; accessed via SPI during cold boot and OTA update sequences. Use Value: 100K-cycle endurance and 20-year retention ensure >10 years of reliable firmware version management without degradation. |
Use Scenario: Capturing sensor telemetry and alarm events in remote environmental monitoring stations powered by solar + Li-ion. IC Role / Device Role / Timing Role: Sequential-access data logger using continuous array read and low-power mode (01h opcode) at 15 MHz. Use Value: 200 nA ultra-deep power-down current extends battery life to >3 years between maintenance cycles. |
| Industrial HMI Configuration | Medical Device Calibration |
Use Scenario: Holding UI assets (fonts, icons, language strings) and user preferences in a DIN-rail PLC HMI panel. IC Role / Device Role / Timing Role: SPI-connected memory serving as static resource store; accessed via rapid burst reads during screen refresh. Use Value: RapidS™ 85 MHz operation reduces GUI asset load latency to <50 µs per 256-byte block, improving perceived responsiveness. |
Use Scenario: Storing factory-calibrated sensor coefficients and user-adjusted offsets in portable ultrasound transducers. IC Role / Device Role / Timing Role: Secure parameter vault using sector lockdown and OTP security register to prevent tampering. Use Value: Hardware-enforced read-only lockdown of calibration sectors ensures regulatory compliance (IEC 62304 Class B) and audit traceability. |
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-SSHN-T | Predecessor generation; max 66 MHz clock, no RapidS™ support, 500 nA deep power-down (vs. 200 nA), same 2-Mbit density and DFN-8 package. | Lacks high-speed audio streaming capability; higher standby current limits battery lifetime in ultra-low-power designs. | Select only if legacy design reuse is required and 85 MHz performance is unnecessary. |
| W25Q20EWUXIE | 2 Mbit Quad SPI NOR flash; 133 MHz QSPI, 4-wire interface, no SRAM buffer, no read-modify-write, 100K cycles, 20-year retention. | Requires QSPI controller support; no native byte-alterable emulation - unsuitable for dynamic parameter storage without external logic. | Choose for higher bandwidth where quad I/O and XIP execution are prioritized over E2PROM-like flexibility. |
Compared with AT45DB021D-SSHN-T, AT45DB021E-SSHNHA-T delivers 29% faster read throughput and 60% lower deep-sleep current; versus W25Q20EWUXIE, it trades quad interface speed for integrated buffer-based byte-level alterability and simpler 3-wire SPI integration.
Availability
AT45DB021E-SSHNHA-T is available at Aetrix Electronics and suitable for industrial HMI panels, battery-powered environmental loggers, medical calibration vaults, and motor drive firmware storage requiring stable component supply across multi-year production cycles.
Supply support for AT45DB021E-SSHNHA-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-SSHNHA-T belongs to Renesas' DataFlash family, engineered specifically for sequential-access, low-pin-count, low-voltage embedded storage where firmware integrity, field upgradability, and ultra-low power consumption are critical.
FAQ
What is the default page size configuration for AT45DB021E-SSHNHA-T?
The AT45DB021E-SSHNHA-T is factory pre-configured with a 264-byte page size, which includes 256 bytes of user data plus 8 bytes of overhead. This configuration supports legacy DataFlash command compatibility and enables efficient read-modify-write operations using the internal SRAM buffer. The 256-byte alternative is available upon factory order but not applicable to the -SSHNHA-T variant.
Does AT45DB021E-SSHNHA-T support true random access like parallel NOR flash?
No, AT45DB021E-SSHNHA-T is a sequential-access device and does not support true random addressing. It requires command-driven page-level addressing (e.g., Main Memory Page Read, Buffer Read) rather than byte-addressed parallel bus access. Random byte updates are achieved indirectly via its SRAM buffer and read-modify-write sequence - not direct address-line decoding.
How does the WP pin function in AT45DB021E-SSHNHA-T?
In AT45DB021E-SSHNHA-T, the WP (Write Protect) pin provides hardware-level sector protection: when asserted low, it enforces write/erase inhibition on sectors previously configured in the Sector Protection Register. It operates independently of software commands and remains active during power transitions, offering fail-safe firmware protection against accidental corruption during voltage instability.
Can AT45DB021E-SSHNHA-T be used in place of standard SPI NOR flash in existing designs?
AT45DB021E-SSHNHA-T is not a drop-in replacement for standard SPI NOR flash due to fundamental architectural differences: it uses sequential-access commands (e.g., Continuous Array Read, Buffer transfers), lacks uniform 4-kB sector erase, and requires explicit buffer management. Firmware drivers must be rewritten to match DataFlash-specific opcodes and flow control - no transparent pin or protocol compatibility exists.
What is the purpose of the 128-byte Security Register in AT45DB021E-SSHNHA-T?
The 128-byte Security Register in AT45DB021E-SSHNHA-T contains 64 bytes of factory-programmed unique device identifier and 64 bytes of user-programmable secure storage. It supports cryptographic key binding, anti-cloning measures, and traceability - accessible only via dedicated 77h opcode and protected by hardware write-disable after initial programming, ensuring immutable device identity.
AT45DB021E-SSHNHA-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-SSHNHA-T FAQ
1.How can I place an order for AT45DB021E-SSHNHA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB021E-SSHNHA-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-SSHNHA-T reliable?
The price and inventory of AT45DB021E-SSHNHA-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-SSHNHA-T is usually 5 days.
3.What payment methods are accepted for AT45DB021E-SSHNHA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB021E-SSHNHA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB021E-SSHNHA-T?
AT45DB021E-SSHNHA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB021E-SSHNHA-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-SSHNHA-T?
For technical support, including AT45DB021E-SSHNHA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB021E-SSHNHA-T requirements.
6.How does Aetrix verify that AT45DB021E-SSHNHA-T is sourced from the original manufacturer or authorized distributors?
All AT45DB021E-SSHNHA-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-SSHNHA-T meets industry standards.
7.What is the process for return or replacement of AT45DB021E-SSHNHA-T?
All AT45DB021E-SSHNHA-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB021E-SSHNHA-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-SSHNHA-T part is unused and in its original packaging.
Return procedure for AT45DB021E-SSHNHA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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