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Renesas AT45DB642D-CNU-SL383
- Part No.:
- AT45DB642D-CNU-SL383
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN
- Datasheet:
-
AT45DB642D-CNU-SL383.pdf
- Description:
- IC FLASH 64MBIT SPI 66MHZ 8CASON
- Quantity:
- Payment:
- Shipping:
Inventory:1,019
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Product details
Overview
AT45DB642D-CNU-SL383 from Microchip Technology is a 64-Mbit dual-interface DataFlash memory IC supporting both RapidS™ SPI-compatible serial (up to 66 MHz) and Rapid8™ 8-bit parallel (up to 50 MHz) interfaces, with user-configurable 1024- or 1056-byte page size, two 1024/1056-byte SRAM buffers, and industrial temperature range (–40°C to +85°C). It enables code shadowing, firmware storage, and data logging in resource-constrained embedded systems.
For engineers reviewing the AT45DB642D-CNU-SL383 datasheet, AT45DB642D-CNU-SL383 pinout, AT45DB642D-CNU-SL383 application, or AT45DB642D-CNU-SL383 equivalent, key selection considerations include dual-interface flexibility, buffer-assisted concurrent read/write, sector-level hardware write protection, 100,000 program/erase cycles, and RoHS-compliant TSOP-28 packaging.
Technical Context
The AT45DB642D-CNU-SL383 implements a sequential-access Flash architecture with no address bus-data is accessed via command-opcode sequences over either SPI or 8-bit parallel interface. Its memory is organized as 8,192 pages (1024- or 1056-byte), partitioned into 32 sectors of 256 pages each, enabling granular erase control at page (1 KB), block (8 KB), sector (256 KB), or chip (64 Mbit) level.
Two independent SRAM buffers support pipelined operation: while one buffer receives new data via SI/I/O pins, the other can simultaneously program a page into Flash or serve read requests. All programming and erase operations are fully self-timed, requiring no external timing control beyond CS assertion/deassertion and SCK/CLK edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 64 Mbit (8,388,608 bytes) organized as 8,192 × 1024-byte or 1056-byte pages |
| Supply Voltage | 2.7V–3.6V single supply-enables direct interfacing with 3.3V microcontrollers without level shifters |
| RapidS Interface Speed | Up to 66 MHz clock (fCAR1)-supports high-throughput streaming reads bypassing buffers |
| Rapid8 Interface Speed | Up to 50 MHz clock-provides byte-wide throughput comparable to legacy parallel EEPROMs |
| Page Program/Erase Endurance | ≥100,000 cycles per page-guarantees long-term reliability for firmware update partitions |
| Data Retention | 20 years at +85°C-validated for industrial lifecycle requirements without refresh |
| Standby Current | 25 µA typical-minimizes quiescent power in battery-backed or always-on monitoring nodes |
Pinout & Package
AT45DB642D-CNU-SL383 is packaged in a 28-pin TSOP-I (Thin Small Outline Package) with 0.55 mm pitch, compliant with JEDEC MO-153AC. Pin functions support dual-mode operation via SER/BYTE control, with dedicated VCCP/GNDP for 8-bit I/O isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; falling edge initiates command sequence, rising edge triggers self-timed operation |
| SCK/CLK | Serial Clock / 8-bit Clock | Unified clock input-rising edge latches SI or I/O7–I/O0; falling edge clocks SO or I/O7–I/O0 |
| SI | Serial Input | Command/address/data input for RapidS mode; high-impedance when SER/BYTE = low |
| SO | Serial Output | Command/status/data output for RapidS mode; high-impedance when SER/BYTE = low |
| I/O7–I/O0 | 8-bit Bidirectional Data Bus | Parallel data path for Rapid8 mode; tri-stated when SER/BYTE = high |
| WP | Hardware Write Protect | Low-active pin that overrides software protection-blocks all program/erase commands to locked sectors |
| RDY/BUSY | Open-Drain Status Indicator | Drives low during self-timed operations (program/erase/buffer transfer); enables polling without command overhead |
| SER/BYTE | Interface Mode Select | High = RapidS only (SI/SO active); low = Rapid8 only (I/O7–I/O0 active); internal pull-up allows default serial use |
| VCCP / GNDP | 8-bit I/O Power/Ground | Isolated supply domain for parallel interface-decouples noise from core VCC/GND when Rapid8 used |
Key Features
| Feature | Design Value |
|---|---|
| Dual-interface concurrency | Simultaneous RapidS and Rapid8 access prohibited-but DSP+MCU co-design enabled by dedicating one interface per host |
| Configurable page size | Factory-set 1024-byte (binary) or 1056-byte (DataFlash standard) pages-optimizes alignment for legacy firmware or streaming audio |
| Buffer-assisted streaming | Two independent 1024/1056-byte SRAM buffers allow continuous data ingestion while Flash reprogramming occurs in background |
| Hardware sector lockdown | Permanent, irreversible lock of individual 256-KB sectors-secures boot code against accidental overwrite or malicious tampering |
| Security register | 128-byte protected register with 64-byte user-programmable space + unique 64-byte device ID-supports secure provisioning and anti-cloning |
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: Nonvolatile firmware repository with dual-interface support-RapidS for debug port updates, Rapid8 for high-speed factory programming. Use Value: 100,000 endurance cycles and 20-year retention ensure reliable operation across 15+ year PLC deployments without replacement. |
Use Scenario: Capturing timestamped sensor waveforms (ECG, SpO₂) in portable diagnostic devices with limited PCB area. IC Role / Device Role / Timing Role: High-density sequential data buffer-continuous array read (E8H/0BH) enables real-time waveform streaming to host MCU without CPU intervention. Use Value: 66 MHz RapidS read speed and zero-page-boundary latency eliminate gaps in multi-page ECG capture sessions. |
| Automotive Infotainment Boot Memory | Smart Meter Firmware Vault |
|
Use Scenario: Hosting boot code and UI assets for automotive head units requiring fast cold-start and secure OTA updates. IC Role / Device Role / Timing Role: Code shadowing target-continuous read mode loads executable code directly into MCU cache with no wait states. Use Value: 25 µA standby current and –40°C to +85°C rating meet automotive ASIL-B environmental and power constraints. |
Use Scenario: Securing meter calibration tables and cryptographic keys in utility smart meters deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Tamper-resistant storage-permanent sector lockdown and hardware WP pin prevent unauthorized firmware modification. Use Value: 128-byte security register with unique device ID enables per-unit key binding and regulatory compliance (e.g., ANSI C12.22). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial/parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q64JVSSIQ | 64 Mbit SPI-only NOR Flash; no parallel interface; 133 MHz Quad SPI; no SRAM buffers | Better random-access read performance but lacks concurrent buffer operation and dual-interface flexibility | Select when system uses only SPI and requires faster XIP or execute-in-place capability |
| Macronix MX25L6433FZNI-10G | 64 Mbit SPI Flash with DTR support; no 8-bit interface; 104 MHz double-data-rate; no integrated buffers | Higher bandwidth than RapidS but no parallel option or hardware sector lockdown feature | Select when maximizing SPI throughput is critical and hardware write protection is managed externally |
Compared with W25Q64JVSSIQ and MX25L6433FZNI-10G, the AT45DB642D-CNU-SL383 uniquely delivers true dual-interface concurrency, on-die SRAM buffering for uninterrupted data flow, and permanent sector lockdown-making it optimal for mixed-host systems requiring both deterministic timing and physical security.
Availability
AT45DB642D-CNU-SL383 is available at Aetrix Electronics and suitable for industrial firmware storage, medical data logging, automotive infotainment boot memory, smart meter firmware vaults, and secure IoT edge node applications requiring stable component supply and long-term lifecycle support.
Supply support for AT45DB642D-CNU-SL383 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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The AT45DB642D belongs to Microchip's DataFlash family-designed specifically for sequential-access, high-reliability embedded storage where low pin count, dual-interface flexibility, and hardware-based security are mandatory.
FAQ
What interfaces does the AT45DB642D-CNU-SL383 support?
The AT45DB642D-CNU-SL383 supports two independent interfaces: RapidS™ (SPI-compatible, up to 66 MHz) and Rapid8™ (8-bit parallel, up to 50 MHz). Interface selection is controlled by the SER/BYTE pin-high for serial, low for parallel. Both interfaces share common control signals (CS, RESET, RDY/BUSY) but use separate data paths (SI/SO vs. I/O7–I/O0) and power domains (VCC vs. VCCP).
How does the AT45DB642D-CNU-SL383 handle page size configuration?
The AT45DB642D-CNU-SL383 supports two page sizes: 1024 bytes (binary) or 1056 bytes (standard DataFlash). The size is factory-configured and fixed per unit-AT45DB642D-CNU-SL383 is shipped with 1024-byte pages. Page size affects addressing: binary mode uses A22–A0; standard mode uses PA12–PA0 + BA10–BA0. Buffer sizes match the selected page size.
Can the AT45DB642D-CNU-SL383 perform read and write operations simultaneously?
Yes-the AT45DB642D-CNU-SL383 uses two independent SRAM buffers to enable concurrent operations: one buffer can receive data via SI or I/O7–I/O0 while the other buffers data is being programmed into Flash memory. This pipelining eliminates idle time during firmware updates or continuous data logging, significantly improving effective throughput compared to single-buffer Flash devices.
What hardware security features does the AT45DB642D-CNU-SL383 provide?
The AT45DB642D-CNU-SL383 provides three hardware security layers: (1) WP pin-low-active hardware write protect overriding all software commands; (2) Permanent Sector Lockdown-irreversible locking of individual 256-KB sectors; (3) 128-byte Security Register-containing 64-byte user space and unique 64-byte device identifier for secure provisioning. These features are implemented in silicon and require no firmware support.
What is the operating temperature range for the AT45DB642D-CNU-SL383?
The AT45DB642D-CNU-SL383 is rated for industrial temperature operation from –40°C to +85°C. This range is validated across all specifications-including 100,000 program/erase cycles, 20-year data retention, and full-speed operation at 66 MHz RapidS and 50 MHz Rapid8 interfaces-ensuring reliability in harsh environments like factory automation, outdoor metering, and vehicle under-hood applications.
AT45DB642D-CNU-SL383 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 64Mbit
- Memory Organization:
- 1056 Bytes x 8192 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 66 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CASON (6x8)
AT45DB642D-CNU-SL383 FAQ
1.How can I place an order for AT45DB642D-CNU-SL383 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB642D-CNU-SL383 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 AT45DB642D-CNU-SL383 reliable?
The price and inventory of AT45DB642D-CNU-SL383 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB642D-CNU-SL383 is usually 5 days.
3.What payment methods are accepted for AT45DB642D-CNU-SL383?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB642D-CNU-SL383 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB642D-CNU-SL383?
AT45DB642D-CNU-SL383 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB642D-CNU-SL383 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 AT45DB642D-CNU-SL383?
For technical support, including AT45DB642D-CNU-SL383 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB642D-CNU-SL383 requirements.
6.How does Aetrix verify that AT45DB642D-CNU-SL383 is sourced from the original manufacturer or authorized distributors?
All AT45DB642D-CNU-SL383 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 AT45DB642D-CNU-SL383 meets industry standards.
7.What is the process for return or replacement of AT45DB642D-CNU-SL383?
All AT45DB642D-CNU-SL383 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB642D-CNU-SL383, 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 AT45DB642D-CNU-SL383 part is unused and in its original packaging.
Return procedure for AT45DB642D-CNU-SL383:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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