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Renesas AT45DB321E-SHFHA-T
- Part No.:
- AT45DB321E-SHFHA-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB321E-SHFHA-T.pdf
- Description:
- IC FLASH 32MBIT SPI 85MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,595
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Product details
Overview
AT45DB321E-SHFHA-T from Renesas Electronics is a 32-Mbit serial DataFlash memory with extra 1-Mbit security space, operating from 2.3 V to 3.6 V, supporting SPI modes 0 and 3, up to 85 MHz RapidS™ read speed, and featuring two independent 512/528-byte SRAM buffers for interleaved write operations in embedded firmware storage and voice logging systems.
For engineers reviewing the AT45DB321E-SHFHA-T datasheet, AT45DB321E-SHFHA-T pinout, AT45DB321E-SHFHA-T application, or AT45DB321E-SHFHA-T equivalent, key selection criteria include page size configurability (512 vs. 528 bytes), ultra-low deep power-down current (400 nA typical), hardware/software sector protection, OTP security register, and continuous array read capability across full memory - all critical for secure, low-power, high-reliability firmware and data logging designs.
Technical Context
The AT45DB321E-SHFHA-T implements a sequential-access Flash architecture with dual SRAM buffers enabling concurrent read-from-buffer and program-to-main-memory operations. Its RapidS™ interface supports high-frequency read modes (0Bh/1Bh opcodes) delivering ≤6 ns clock-to-output timing at up to 85 MHz.
It uses SPI-compatible 3-wire communication (CS/SCK/SI/SO) with no address bus, relying on command-opcode + 24-bit addressing. Page size is factory-configurable (512 or 528 bytes), and erase granularity spans page (512/528 B), block (4 kB), sector (64 kB), and chip (32 Mbit), with suspend/resume support during active program/erase cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 32 Mbit main memory + 1 Mbit extra security space; organized as 8,192 pages of 512 or 528 bytes each. |
| Supply voltage | 2.3 V to 3.6 V single supply - enables direct interfacing with 2.5 V/3.3 V microcontrollers without level shifting. |
| Max read speed | 85 MHz RapidS™ mode - supports real-time streaming of audio or firmware images with minimal latency. |
| Power-down current | 400 nA ultra-deep power-down (typical) - extends battery life in always-on sensor nodes or portable devices. |
| Endurance & retention | 100,000 program/erase cycles per page minimum; 20-year data retention - suitable for field-upgradable systems. |
| Security features | 128-byte OTP security register (64 B factory UID + 64 B user-programmable); sector lockdown for permanent read-only protection. |
| Interface standard | SPI-compatible, modes 0 and 3; JEDEC-standard Manufacturer/Device ID read - ensures interoperability with standard SPI controllers. |
Pinout & Package
AT45DB321E-SHFHA-T is packaged in an 8-pad Ultra-thin DFN (5 × 6 × 0.6 mm) with exposed pad (non-connected). Pin functions are defined per Renesas DS-AT45DB321E-8784 Rev. N, Page 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition; places SO in high-Z when deasserted. |
| SCK | Serial Clock | Controls data timing; SI latched on rising edge, SO driven on falling edge - ensures deterministic SPI timing alignment. |
| SI | Serial Input | Command, address, and input data entry point; ignored when CS is high - prevents spurious command injection. |
| SO | Serial Output | Data output path for reads and status; high-impedance when CS is deasserted - enables multi-device SPI bus sharing. |
| WP | Write Protect | Hardware sector lock control; low = protection enabled per sector register - provides tamper-resistant firmware partitioning. |
| RESET | Reset Input | Active-low hardware reset; forces device into known state and exits Deep Power-Down - enables safe recovery after brown-out. |
| VCC | Power Supply | 2.3–3.6 V supply for all operations; powers internal charge pump for erase/program - eliminates need for external high-voltage generator. |
| GND | Ground | Reference for all I/O and core logic; connected to exposed thermal pad in UDFN - improves thermal dissipation in compact layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers | Two independent 512/528-byte buffers enable true interleaving: while one buffer streams data to host, the other writes to Flash - sustains continuous data logging without gaps. |
| RapidS™ high-speed read | 85 MHz operation with ≤6 ns tV delivers >10 MB/s effective throughput - meets real-time audio playback and boot-image streaming requirements. |
| Configurable page size | Factory-set 512-byte or 528-byte pages; 528-byte default includes 16-byte overhead for ECC/metadata - simplifies E2PROM emulation and firmware update alignment. |
| Multi-level erase options | Page (512/528 B), block (4 kB), sector (64 kB), and chip (32 Mbit) erase - enables precise wear leveling and partial firmware updates without full reflash. |
| Hardware sector lockdown | Individual sectors can be permanently locked to read-only via OTP register - prevents unauthorized modification of bootloader or calibration data. |
| Ultra-low power states | 400 nA ultra-deep power-down and 3 μA deep power-down - reduces quiescent consumption by >99% vs. active mode, critical for energy-harvesting systems. |
Applications
| Firmware Storage | Voice/Data Logging |
|---|---|
Use Scenario: Storing and updating MCU boot code and application firmware in industrial PLCs with field upgrade capability. IC Role / Device Role / Timing Role: Non-volatile sequential storage with fast read access and robust program/erase endurance. Use Value: Enables secure, over-the-air firmware updates using built-in sector protection and 100K-cycle endurance per page. |
Use Scenario: Continuous recording of sensor telemetry or voice snippets in battery-powered environmental monitors. IC Role / Device Role / Timing Role: High-throughput sequential write buffer with low-latency background Flash programming. Use Value: Dual-buffer interleaving sustains >1 MB/s sustained write rate while maintaining system responsiveness. |
| Secure Bootloader Storage | Medical Device Data Archiving |
Use Scenario: Hosting immutable bootloader and cryptographic keys in Class III medical devices requiring FDA compliance. IC Role / Device Role / Timing Role: Tamper-resistant storage with hardware-enforced read-only lockdown and unique factory UID. Use Value: Sector lockdown and 128-byte OTP register ensure bootloader integrity and traceability per IEC 62304. |
Use Scenario: Long-term archival of diagnostic waveforms (ECG, EEG) in portable clinical equipment. IC Role / Device Role / Timing Role: High-reliability, low-power nonvolatile memory with 20-year data retention and low standby current. Use Value: 25 μA standby current and 20-year retention meet IEC 60601-1 battery backup and shelf-life requirements. |
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 W25Q32JW | 32 Mbit Quad SPI NOR Flash; 133 MHz QSPI, no dual-buffer architecture; lacks RapidS™ or configurable page size. | Higher random read performance but no native sequential streaming optimization or E2PROM emulation support. | Choose for faster random access or QSPI bus compatibility; avoid if interleaved write throughput or page-size flexibility is required. |
| Macronix MX25L3233F | 32 Mbit standard SPI NOR Flash; max 104 MHz, no SRAM buffers, no OTP security register or sector lockdown. | Lower cost, simpler command set; no hardware-based security or continuous-array read acceleration. | Choose for basic code storage where security and streaming efficiency are secondary; not suitable for secure logging or firmware update resilience. |
Compared with W25Q32JW and MX25L3233F, the AT45DB321E-SHFHA-T uniquely delivers dual-buffer interleaving, factory-configurable page size, hardware sector lockdown, and 400 nA ultra-deep power-down - making it optimal for secure, low-power, streaming-centric embedded storage where data integrity and continuous write capability are mandatory.
Availability
AT45DB321E-SHFHA-T is available at Aetrix Electronics and suitable for firmware storage, voice/data logging, secure bootloader hosting, and medical device data archiving requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB321E-SHFHA-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 AT45DB321E belongs to Renesas' DataFlash® family, designed specifically for high-reliability, low-pin-count, sequential-access storage in resource-constrained embedded systems requiring secure, low-power, and field-upgradable memory.
FAQ
What is the maximum clock frequency supported by AT45DB321E-SHFHA-T in RapidS™ mode?
The AT45DB321E-SHFHA-T supports up to 85 MHz in RapidS™ high-frequency read mode (opcodes 0Bh and 1Bh), with a guaranteed clock-to-output time (tV) of ≤6 ns. This enables sustained read throughput exceeding 10 MB/s, making it suitable for real-time audio playback and fast boot-image loading in the AT45DB321E-SHFHA-T.
Does AT45DB321E-SHFHA-T support both 512-byte and 528-byte page sizes?
Yes, the AT45DB321E-SHFHA-T supports user-selectable page sizes: 512 bytes (binary-aligned) or 528 bytes (standard DataFlash format with 16-byte overhead). The configuration is factory-set and cannot be changed in-circuit; the AT45DB321E-SHFHA-T datasheet specifies this as a fixed characteristic per unit.
How does the dual-buffer architecture of AT45DB321E-SHFHA-T improve write performance?
The AT45DB321E-SHFHA-T integrates two independent 512/528-byte SRAM buffers that allow simultaneous host-to-buffer data transfer and buffer-to-Flash programming. This interleaving eliminates write stalls, enabling continuous data streaming - a key advantage over single-buffer Flash in the AT45DB321E-SHFHA-T for logging and firmware update applications.
What security mechanisms are implemented in AT45DB321E-SHFHA-T?
The AT45DB321E-SHFHA-T includes hardware sector protection, software-controlled sector lockdown (permanent read-only), and a 128-byte OTP security register with 64-byte factory UID and 64-byte user-programmable space. These features collectively prevent unauthorized firmware modification and ensure traceability in the AT45DB321E-SHFHA-T.
What is the ultra-deep power-down current specification for AT45DB321E-SHFHA-T?
The AT45DB321E-SHFHA-T draws only 400 nA (typical) in ultra-deep power-down mode, as specified in Renesas DS-AT45DB321E-8784 Rev. N, Section 10.2. This ultra-low quiescent current significantly extends battery life in always-on edge devices using the AT45DB321E-SHFHA-T.
AT45DB321E-SHFHA-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:
- 32Mbit
- Memory Organization:
- 528 Bytes x 8192 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 4ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45DB321E-SHFHA-T FAQ
1.How can I place an order for AT45DB321E-SHFHA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB321E-SHFHA-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 AT45DB321E-SHFHA-T reliable?
The price and inventory of AT45DB321E-SHFHA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB321E-SHFHA-T is usually 5 days.
3.What payment methods are accepted for AT45DB321E-SHFHA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB321E-SHFHA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB321E-SHFHA-T?
AT45DB321E-SHFHA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB321E-SHFHA-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 AT45DB321E-SHFHA-T?
For technical support, including AT45DB321E-SHFHA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB321E-SHFHA-T requirements.
6.How does Aetrix verify that AT45DB321E-SHFHA-T is sourced from the original manufacturer or authorized distributors?
All AT45DB321E-SHFHA-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 AT45DB321E-SHFHA-T meets industry standards.
7.What is the process for return or replacement of AT45DB321E-SHFHA-T?
All AT45DB321E-SHFHA-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB321E-SHFHA-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 AT45DB321E-SHFHA-T part is unused and in its original packaging.
Return procedure for AT45DB321E-SHFHA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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