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Renesas AT45DB321E-SHF2B-T
- Part No.:
- AT45DB321E-SHF2B-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB321E-SHF2B-T.pdf
- Description:
- IC FLASH 32MBIT SPI 85MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,044
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Product details
Overview
AT45DB321E-SHF2B-T from Renesas Electronics is a 32-Mbit serial DataFlash memory with 1-Mbit extra capacity, supporting SPI modes 0 and 3 at up to 85 MHz, featuring two independent 512/528-byte SRAM buffers, 400 nA ultra-deep power-down current, and page/block/sector/chip erase options. It serves as nonvolatile storage for firmware updates and audio logging in embedded microcontroller systems.
For engineers reviewing the AT45DB321E-SHF2B-T datasheet, AT45DB321E-SHF2B-T pinout, AT45DB321E-SHF2B-T application, or AT45DB321E-SHF2B-T equivalent, key selection criteria include SPI timing compliance (tV ≤ 6 ns), dual-buffer interleaved write capability, factory-configurable 512-byte page mode, hardware/software sector protection, and RoHS-compliant 8-pad DFN (6 × 8 × 1.0 mm) packaging.
Technical Context
The AT45DB321E-SHF2B-T implements a serial sequential-access architecture with two dedicated SRAM buffers enabling concurrent read-while-write operations-critical for continuous data streaming. Its RapidS™ interface extends standard SPI with high-frequency read opcodes (0Bh/1Bh) achieving up to 85 MHz clock rates while maintaining full backward compatibility with legacy E8h/03h commands.
Memory organization supports flexible page sizing: default 528-byte pages (512 data + 16 overhead) or factory-configured 512-byte pages. Erase granularity spans page (512/528 B), block (4 kB), sector (64 kB), and full chip (32 Mbits), all self-timed and suspend/resume capable. Security includes OTP security register, sector lockdown, and hardware WP pin control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 32 Mbit main memory + 1 Mbit extra space; organized as 8,192 pages of 512 or 528 bytes each. |
| Interface Speed | Up to 85 MHz SPI clock; tV (clock-to-output) ≤ 6 ns ensures tight timing margins in high-speed controllers. |
| Power Consumption | 400 nA ultra-deep power-down (typical); enables battery-backed retention in always-on edge nodes. |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention at 85°C. |
| Page Size Config | User-selectable via command; factory pre-configurable for 512-byte pages to maximize usable payload per page. |
| Buffer Architecture | Two independent 512/528-byte SRAM buffers support true interleaved writes-no CPU stall during flash programming. |
| Erase Granularity | Page (512/528 B), block (4 kB), sector (64 kB), chip (32 Mbits); enables precise field-upgrade partitioning. |
Pinout & Package
AT45DB321E-SHF2B-T uses an 8-pad DFN package (6 mm × 8 mm × 1.0 mm, RoHS-compliant). Pin functions are defined for SPI communication and hardware control with no internal connection to the exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; rising edge ends self-timed operations; deassertion places SO in high-Z and enters standby (not deep power-down). |
| SCK | Serial Clock | Controls data transfer timing; SI latched on rising edge, SO driven on falling edge-enables deterministic SPI timing. |
| SI | Serial Input | Command, address, and input data entry point; ignored when CS is high. |
| SO | Serial Output | Data output path for reads and status; high-impedance when CS is deasserted. |
| WP | Write Protect | Hardware lock for sector protection registers; low = protection enabled, high = protection disabled. |
| RESET | Reset Input | Active-low asynchronous reset; forces device into known state without power cycle. |
| VCC | Supply Voltage | Single 2.3 V–3.6 V supply powers all operations-no charge pump or external voltage required. |
| GND | Ground | Reference for all I/O and core logic; thermal pad may be connected to GND for improved thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Enables true read-while-write: one buffer receives new data while the other transfers to flash-eliminates write latency bottlenecks. |
| RapidS™ High-Speed Read | Supports 0Bh/1Bh opcodes for continuous array reads at up to 85 MHz-doubles throughput vs. legacy E8h mode. |
| Flexible Page Erase | Per-page erase (512/528 B) allows fine-grained firmware patching without disturbing adjacent code sections. |
| Hardware Sector Lockdown | Permanent read-only locking of any sector via OTP register-prevents accidental or malicious overwrite of boot code. |
| Ultra-Low Deep Power-Down | 400 nA typical current draw in ultra-deep power-down extends battery life in maintenance-free IoT sensors. |
Applications
| Industrial Firmware Storage | Medical Audio Logging |
|---|---|
Use Scenario: Storing field-upgradable firmware images in programmable logic controllers with limited PCB real estate. IC Role / Device Role / Timing Role: Nonvolatile sequential storage with dual-buffered write capability to sustain >1 MB/s update streams without CPU intervention. Use Value: Eliminates need for external RAM buffering; reduces BOM count and layout complexity while ensuring atomic firmware updates. | Use Scenario: Capturing diagnostic voice annotations in portable ultrasound devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power persistent storage with ultra-deep power-down mode activated between recordings. Use Value: 400 nA shutdown current enables multi-year battery operation; RapidS™ read supports real-time playback at clinical sampling rates. |
| Automotive Telematics Bootloader | Smart Meter Secure Configuration |
Use Scenario: Hosting secure bootloader code and cryptographic keys in OBD-II telematics modules subject to AEC-Q100 stress screening. IC Role / Device Role / Timing Role: Trusted execution environment storage with hardware WP pin and sector lockdown for immutable boot partition. Use Value: Prevents unauthorized firmware modification; 20-year data retention meets automotive lifecycle requirements. | Use Scenario: Storing tariff tables, calibration coefficients, and tamper logs in ANSI C12.22-compliant smart electricity meters. IC Role / Device Role / Timing Role: Secure configuration vault with 128-byte OTP security register and individual sector lock-down. Use Value: Enables field-programmable metering parameters while meeting ANSI/IEEE security mandates for utility infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB321D-SHF2B-T | Previous revision with identical pinout and command set; lacks Ultra-Deep Power-Down (400 nA) mode-uses 3 μA deep power-down instead. | Not suitable for ultra-low-power battery applications requiring sub-μA sleep states. | Select AT45DB321E-SHF2B-T when <1 μA shutdown current is mandatory; otherwise D-version offers cost parity for less stringent power budgets. |
| W25Q32JVSNIQ | Quad SPI interface (QPI), no dual SRAM buffers; 32 Mbit density, but requires external buffering for continuous write streams. | Higher peak bandwidth possible via QPI, but lacks native read-while-write-requires software-managed double-buffering. | Choose W25Q32JVSNIQ only if system already uses Quad SPI controller and can absorb CPU overhead for buffer management. |
Compared with AT45DB321D-SHF2B-T, the AT45DB321E-SHF2B-T delivers 10× lower ultra-deep power-down current and enhanced security features; versus W25Q32JVSNIQ, it trades Quad SPI speed for integrated dual-buffer concurrency-making it superior for deterministic real-time streaming where CPU offload is critical.
Availability
AT45DB321E-SHF2B-T is available at Aetrix Electronics and suitable for industrial firmware storage, medical audio logging, automotive telematics bootloaders, and smart meter secure configuration requiring stable component supply across extended product lifecycles.
Supply support for AT45DB321E-SHF2B-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.
The AT45DB321E-SHF2B-T belongs to Renesas' DataFlash® family-designed specifically for systems needing high-density, low-pin-count, low-voltage serial Flash with built-in SRAM buffers to eliminate external memory and simplify firmware update architectures.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB321E-SHF2B-T?
The AT45DB321E-SHF2B-T supports up to 85 MHz in RapidS™ high-frequency read mode (opcodes 0Bh/1Bh). Standard SPI modes 0 and 3 operate at up to this rate with tV ≤ 6 ns clock-to-output timing, enabling direct interfacing with high-performance microcontrollers without wait states. Legacy read commands (E8h/03h) are rated for lower frequencies.
Does the AT45DB321E-SHF2B-T require external high-voltage programming circuitry?
No, the AT45DB321E-SHF2B-T operates entirely from a single 2.3 V–3.6 V supply for all read, program, and erase operations. It contains an internal charge pump and requires no external high-voltage generators or special programming voltages-simplifying design and reducing BOM cost compared to conventional parallel NOR Flash.
How does the dual-buffer architecture of the AT45DB321E-SHF2B-T improve system performance?
The AT45DB321E-SHF2B-T's two independent 512/528-byte SRAM buffers allow simultaneous data reception into one buffer while the other transfers content to main memory. This eliminates CPU stalls during flash programming and enables sustained continuous data streaming-critical for audio recording, firmware OTA updates, and sensor data logging without external RAM.
Can the AT45DB321E-SHF2B-T be used in battery-powered applications with multi-year runtime requirements?
Yes-the AT45DB321E-SHF2B-T draws only 400 nA (typical) in ultra-deep power-down mode and 25 μA in standby, making it ideal for energy-constrained designs. Its 20-year data retention at 85°C ensures long-term reliability in sealed battery-operated devices such as environmental sensors, asset trackers, and medical wearables.
What security mechanisms does the AT45DB321E-SHF2B-T provide for protecting firmware or configuration data?
The AT45DB321E-SHF2B-T provides hardware sector protection via the WP pin, individual sector lock-down (permanent read-only), and a 128-byte OTP security register with 64 bytes factory-programmed unique ID and 64 bytes user-programmable. These features prevent unauthorized access, overwrite, or cloning-meeting baseline requirements for secure boot and regulatory compliance in industrial and medical systems.
AT45DB321E-SHF2B-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:
- 512 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-SHF2B-T FAQ
1.How can I place an order for AT45DB321E-SHF2B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB321E-SHF2B-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-SHF2B-T reliable?
The price and inventory of AT45DB321E-SHF2B-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-SHF2B-T is usually 5 days.
3.What payment methods are accepted for AT45DB321E-SHF2B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB321E-SHF2B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB321E-SHF2B-T?
AT45DB321E-SHF2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB321E-SHF2B-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-SHF2B-T?
For technical support, including AT45DB321E-SHF2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB321E-SHF2B-T requirements.
6.How does Aetrix verify that AT45DB321E-SHF2B-T is sourced from the original manufacturer or authorized distributors?
All AT45DB321E-SHF2B-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-SHF2B-T meets industry standards.
7.What is the process for return or replacement of AT45DB321E-SHF2B-T?
All AT45DB321E-SHF2B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB321E-SHF2B-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-SHF2B-T part is unused and in its original packaging.
Return procedure for AT45DB321E-SHF2B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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