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Renesas AT45DB642D-TU-SL383
- Part No.:
- AT45DB642D-TU-SL383
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT45DB642D-TU-SL383.pdf
- Description:
- IC FLASH 64MBIT SPI 66MHZ 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,844
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Product details
Overview
AT45DB642D-TU-SL383 from Adesto Technologies (acquired by Dialog Semiconductor, now part of Renesas) is a 64-Mbit dual-interface DataFlash memory IC supporting both RapidS™ SPI-compatible serial interface (up to 66 MHz) and Rapid8™ 8-bit parallel interface (up to 50 MHz), 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-TU-SL383 datasheet, AT45DB642D-TU-SL383 pinout, AT45DB642D-TU-SL383 application, or AT45DB642D-TU-SL383 equivalent, key selection considerations include dual-interface flexibility, buffer-assisted concurrent read/write operation, sector-level hardware write protection, 100,000 program/erase cycles, and green RoHS-compliant TSOP packaging.
Technical Context
The AT45DB642D-TU-SL383 implements a sequential-access Flash architecture with two independent SRAM buffers enabling simultaneous data reception (via SI or I/O7–I/O0) while reprogramming the main memory array. Its dual-interface control is managed exclusively via the SER/BYTE pin, which selects between SPI (SI/SO/SCK) and 8-bit (I/O7–I/O0/CLK) modes - no shared signal contention.
Memory organization comprises 8,192 pages (1024- or 1056-byte configurable), grouped into 32 sectors of 256 pages each (except Sector 0), with flexible erase granularity: page (1 KB), block (8 KB), sector (256 KB), or chip (64 Mbit). All program and erase operations are fully self-timed and require no external high-voltage supply.
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 - eliminates need for voltage translators or auxiliary regulators |
| RapidS Interface Speed | Up to 66 MHz clock - supports high-throughput firmware updates over SPI Mode 0/3 |
| Rapid8 Interface Speed | Up to 50 MHz clock - enables low-latency byte-aligned access for microcontroller co-processing |
| SRAM Buffers | Two independent 1024/1056-byte buffers - allow pipelined streaming without CPU intervention |
| Erase Endurance | ≥100,000 program/erase cycles per page - validated for long-life data logging applications |
| Data Retention | 20 years at 85°C - meets industrial-grade reliability requirements for unattended systems |
Pinout & Package
AT45DB642D-TU-SL383 is packaged in a 28-pin Thin Small Outline Package (TSOP-II, Type 1), lead-free and RoHS compliant. Pin functions support dual-interface operation with hardware-selectable mode via SER/BYTE, dedicated power domains (VCC/VCCP), and open-drain RDY/BUSY signaling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; falling edge initiates command sequence, rising edge terminates operation |
| SCK/CLK | Serial Clock / 8-bit Clock | Unified clock input for both interfaces; rising edge latches input, falling edge clocks output |
| SI | Serial Input | Command/address/data input for RapidS mode; ignored when SER/BYTE = low |
| SO | Serial Output | 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 for selected sectors - critical for secure boot code |
| RDY/BUSY | Open-Drain Status Indicator | Pulled low during self-timed program/erase/page-transfer - enables polling without command overhead |
| SER/BYTE | Interface Selection Control | High = RapidS active, low = Rapid8 active; internal pull-up allows default serial-only configuration |
| VCCP / GNDP | 8-bit I/O Power Domain | Separate supply/ground for parallel interface - isolates noise from core logic and enables mixed-voltage designs |
Key Features
| Feature | Design Value |
|---|---|
| Dual-interface concurrency | Independent RapidS and Rapid8 ports allow simultaneous connection to DSP and MCU - no bus arbitration logic required |
| Configurable page size | Factory-set 1024-byte (binary) or 1056-byte (standard DataFlash) pages - optimizes alignment for legacy firmware or real-time streaming |
| Buffer-assisted streaming | Two SRAM buffers enable continuous data ingestion while Flash is being reprogrammed - eliminates write stalls in audio/video buffering |
| Hardware sector lockdown | Permanent, irreversible lock on individual sectors - prevents accidental overwrite of bootloader or calibration data |
| Security register | 128-byte protected space: 64-byte user-programmable + 64-byte unique device ID - supports secure provisioning and anti-cloning |
| Continuous array read | Legacy (E8H) and high-speed (0BH) modes support wraparound reads across page and array boundaries - ideal for code shadowing |
Applications
| Firmware Storage | Audio Buffering |
|---|---|
Use Scenario: Storing and updating bootloaders, application firmware, and configuration tables in industrial controllers. IC Role / Device Role / Timing Role: Nonvolatile firmware repository with in-system reprogrammability via SPI or parallel interface. Use Value: Enables field firmware upgrades without requiring external programming hardware or high-voltage signals - reduces service cost and downtime. |
Use Scenario: Real-time capture and playback of voice prompts or alarm tones in medical devices and smart speakers. IC Role / Device Role / Timing Role: Dual-buffered streaming memory bridging between ADC/DAC and host processor. Use Value: Continuous read capability and concurrent buffer fill allow gapless audio playback while recording new samples - no DMA or CPU burst overhead. |
| Data Logging | Secure Boot Code Storage |
Use Scenario: Recording sensor readings (temperature, pressure, motion) in environmental monitoring nodes with multi-year battery life. IC Role / Device Role / Timing Role: High-endurance, low-power sequential storage with sector-level wear leveling. Use Value: 100,000-cycle endurance and 25 µA standby current extend battery life beyond 5 years in intermittent logging applications. |
Use Scenario: Storing immutable bootloader and cryptographic keys in automotive ECUs and payment terminals. IC Role / Device Role / Timing Role: Hardware-locked secure memory partition with unique device identifier. Use Value: Permanent sector lockdown and 64-byte device ID prevent cloning and ensure chain-of-trust integrity during secure boot verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-interface Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB642D-CNU | Same die, 28-pin WSON package (6×8 mm); no VCCP/GNDP pins - lacks separate 8-bit I/O power domain | Preferred for space-constrained PCBs where parallel interface is unused or integrated via level shifters | Select when board area is critical and Rapid8 interface is not required - simplifies layout and BOM |
| W25Q64JWSSIQ | 64-Mbit Quad SPI NOR Flash; single-interface only; no SRAM buffers or Rapid8 support; 133 MHz QSPI clock | Better suited for XIP code execution and high-speed read-only applications, not streaming or dual-host use cases | Choose when system uses only one host processor and requires faster random reads - not a functional substitute for AT45DB642D-TU-SL383's dual-port concurrency |
Compared with AT45DB642D-CNU and W25Q64JWSSIQ, the AT45DB642D-TU-SL383 uniquely delivers true hardware-isolated dual-interface access with concurrent buffer streaming - essential for heterogeneous processor architectures requiring simultaneous DSP and MCU access without arbitration overhead.
Availability
AT45DB642D-TU-SL383 is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, audio processing, and secure firmware storage applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB642D-TU-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
Adesto Technologies developed ultra-low-power, interface-flexible nonvolatile memories before its acquisition by Dialog Semiconductor in 2020; Dialog was subsequently acquired by Renesas Electronics in 2021. The AT45DB642D-TU-SL383 reflects Adesto's focus on embedded systems demanding simplicity, reliability, and energy efficiency.
The AT45DB642D belongs to the DataFlash® family, designed specifically for sequential-access applications where reduced pin count, low-voltage operation, and dual-host connectivity outweigh the need for random-address NOR performance.
FAQ
What interfaces does the AT45DB642D-TU-SL383 support, and how are they selected?
The AT45DB642D-TU-SL383 supports both RapidS™ (SPI-compatible serial) and Rapid8™ (8-bit parallel) interfaces. Interface selection is controlled by the SER/BYTE pin: high enables RapidS (SI/SO/SCK), low enables Rapid8 (I/O7–I/O0/CLK). VCCP and GNDP must be powered only when using Rapid8. This hardware-selectable dual interface allows direct connection to both a DSP and an MCU without multiplexing or glue logic.
Does the AT45DB642D-TU-SL383 require high-voltage programming or external circuitry?
No. The AT45DB642D-TU-SL383 operates entirely from a single 2.7V–3.6V supply for all read, program, and erase operations. It contains no charge pumps or high-voltage generators. All programming and erase cycles are self-timed and internally managed - eliminating the need for external voltage translators, timing controllers, or high-voltage programming adapters.
How does the AT45DB642D-TU-SL383 handle concurrent read and write operations?
The AT45DB642D-TU-SL383 uses two independent 1024/1056-byte SRAM buffers to enable true concurrency: while one buffer streams data into the Flash array (page program), the other can simultaneously accept new data or serve read requests. This decouples host data flow from Flash latency, enabling uninterrupted streaming in audio, telemetry, and firmware update scenarios.
What is the purpose of the VCCP and GNDP pins on the AT45DB642D-TU-SL383?
VCCP and GNDP provide a dedicated power domain for the 8-bit Rapid8 interface (I/O7–I/O0). They electrically isolate the parallel I/O circuitry from the core logic supply (VCC/GND), reducing switching noise coupling and enabling mixed-voltage system designs - for example, interfacing with a 1.8V MCU while maintaining 3.3V core operation. These pins are NC when SER/BYTE = high.
Can the AT45DB642D-TU-SL383 be used for secure boot applications?
Yes. The AT45DB642D-TU-SL383 includes permanent sector lockdown, hardware write protection (WP pin), and a 128-byte security register containing a unique 64-byte device identifier and 64-byte user-programmable space. These features allow immutable storage of bootloader code and cryptographic keys - meeting foundational requirements for secure boot chains in industrial and automotive systems.
AT45DB642D-TU-SL383 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- 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:
- 28-TSOP
AT45DB642D-TU-SL383 FAQ
1.How can I place an order for AT45DB642D-TU-SL383 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB642D-TU-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-TU-SL383 reliable?
The price and inventory of AT45DB642D-TU-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-TU-SL383 is usually 5 days.
3.What payment methods are accepted for AT45DB642D-TU-SL383?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB642D-TU-SL383 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB642D-TU-SL383?
AT45DB642D-TU-SL383 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB642D-TU-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-TU-SL383?
For technical support, including AT45DB642D-TU-SL383 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB642D-TU-SL383 requirements.
6.How does Aetrix verify that AT45DB642D-TU-SL383 is sourced from the original manufacturer or authorized distributors?
All AT45DB642D-TU-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-TU-SL383 meets industry standards.
7.What is the process for return or replacement of AT45DB642D-TU-SL383?
All AT45DB642D-TU-SL383 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB642D-TU-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-TU-SL383 part is unused and in its original packaging.
Return procedure for AT45DB642D-TU-SL383:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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