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Renesas AT45DB641E-CCUN2B-T
- Part No.:
- AT45DB641E-CCUN2B-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 9-UBGA
- Datasheet:
-
AT45DB641E-CCUN2B-T.pdf
- Description:
- IC FLASH 64MBIT SPI 85MHZ 9UBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,529
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Product details
Overview
AT45DB641E-CCUN2B-T from Renesas Electronics is a 64-Mbit serial DataFlash memory with 2-Mbit extra capacity, supporting SPI modes 0 and 3 at up to 85 MHz, featuring dual 256/264-byte SRAM buffers, 1.7 V–3.6 V single-supply operation, and continuous array read capability - deployed in embedded firmware storage and voice/data logging systems.
For engineers reviewing the AT45DB641E-CCUN2B-T datasheet, AT45DB641E-CCUN2B-T pinout, AT45DB641E-CCUN2B-T application, or AT45DB641E-CCUN2B-T equivalent, key selection criteria include RapidS™ high-speed read timing (8 ns tV), ultra-deep power-down current (400 nA), page/block/sector/chip erase flexibility, OTP security register, and industrial temperature compliance.
Technical Context
The AT45DB641E-CCUN2B-T implements a sequential-access Flash architecture with two independent SRAM buffers enabling concurrent buffer write and main memory reprogramming. Its RapidS™ mode supports high-frequency read commands (0Bh/1Bh opcodes) for sub-10 ns clock-to-output performance.
It uses standard SPI signaling with rising-edge input capture (SI, SCK) and falling-edge output drive (SO), supports hardware write protection via WP pin, and integrates sector lockdown, individual sector protection, and 128-byte OTP security register with factory-programmed unique ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 64 Mbit main + 2 Mbit extra memory, organized as 32,768 pages × 256/264 bytes - enables compact firmware image storage with flexible page-size configuration. |
| Interface speed | Up to 85 MHz SPI clock (RapidS™ mode); 8 ns max clock-to-output (tV) - supports real-time streaming read without wait states in high-throughput systems. |
| Power consumption | 400 nA ultra-deep power-down (typical); 25 µA standby (typical); 7 mA active read (typical) - suitable for battery-powered edge devices requiring long sleep cycles. |
| Erase granularity | Page (256/264 B), block (2 KB), sector (256 KB), chip (64 Mbit) - allows precise field-upgrade partitioning without full-memory erasure. |
| Data retention & endurance | 20 years data retention; 100,000 program/erase cycles per page - meets industrial lifecycle requirements for infrequently updated configuration or log storage. |
| Operating voltage | 1.7 V to 3.6 V single supply - interoperable with 1.8 V and 3.3 V logic domains without level-shifting. |
| Temperature range | Full industrial range (–40°C to +85°C) - validated for deployment in automotive control modules and industrial PLCs. |
Pinout & Package
AT45DB641E-CCUN2B-T is packaged in an 8-pad Ultra-thin DFN (5 × 6 × 0.6 mm), RoHS-compliant, with exposed metal pad (NC or GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition and terminates on low-to-high - required for all SPI operations and controls SO high-impedance state. |
| SCK | Serial Clock | Master-generated clock; latches SI data on rising edge, clocks SO data on falling edge - defines timing window for reliable SPI communication. |
| SI | Serial Input | Command/address/data input line; ignored when CS is high - carries all instruction payloads including RapidS™ opcodes and address bytes. |
| SO | Serial Output | Data output line; driven only when CS is low - delivers read data, status register contents, or security register values synchronously to SCK falling edge. |
| WP | Write Protect | Hardware-enabled sector protection control; low = protection enabled - prevents accidental program/erase of protected sectors during power cycling or firmware updates. |
| RESET | Reset Input | Active-low hardware reset; forces device into known state and clears internal status flags - used for recovery after bus contention or initialization failure. |
| VCC | Power Supply | 1.7–3.6 V core supply; powers all logic, memory, and I/O circuits - must be stable before CS assertion per power-up timing requirements. |
| GND | Ground | Reference return path for VCC and all I/O signals - requires low-impedance PCB connection, especially under high-speed switching conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers | Two independent 256/264-byte buffers enable simultaneous receive-and-reprogram operation - eliminates write latency bottlenecks in continuous data acquisition systems. |
| RapidS™ interface | High-frequency read mode (0Bh/1Bh opcodes) achieving ≤8 ns tV at 85 MHz - delivers deterministic timing for time-critical boot code fetch or audio playback buffering. |
| Flexible page size | User-configurable 256-byte or factory-default 264-byte pages - balances alignment efficiency with legacy DataFlash compatibility in firmware update stacks. |
| OTP Security Register | 128-byte one-time programmable register: 64 bytes factory-assigned unique ID + 64 bytes user-programmable - enables secure device authentication and cryptographic key binding. |
| Program/Erase Suspend | Allows pausing active erase or program operations to service urgent read requests - maintains system responsiveness during background flash maintenance. |
Applications
| Firmware Storage | Voice/Data Logging |
|---|---|
Use Scenario: Storing bootloader, application firmware, and configuration parameters in microcontroller-based edge nodes. IC Role / Device Role / Timing Role: Non-volatile sequential storage accessed via SPI during cold boot and over-the-air updates. Use Value: Dual-buffer interleaving enables zero-latency firmware patching; 20-year data retention ensures field-deployed reliability. | Use Scenario: Capturing sensor telemetry or voice snippets in battery-powered IoT endpoints with intermittent connectivity. IC Role / Device Role / Timing Role: High-efficiency circular buffer with rapid page-level overwrite and low-power deep-sleep modes. Use Value: 400 nA ultra-deep power-down extends multi-year battery life; sector lockdown protects critical calibration logs from corruption. |
| Industrial HMI | Medical Diagnostic Equipment |
Use Scenario: Storing GUI assets, language packs, and operational history in panel-mounted HMIs operating across extended temperature ranges. IC Role / Device Role / Timing Role: SPI-connected persistent memory for graphics frame buffers and event logs. Use Value: Industrial –40°C to +85°C rating ensures uninterrupted operation in factory-floor environments; block erase supports modular UI updates. | Use Scenario: Archiving diagnostic waveforms, calibration coefficients, and audit trails in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA-regulated device data with traceability requirements. Use Value: OTP security register provides immutable device identity; sector lockdown enforces read-only access to certified calibration data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q64JWSSIQ | 64 Mbit Quad SPI (QSPI), no SRAM buffers, no RapidS™, 133 MHz max clock, 1.7–2.0 V supply only | Lacks dual-buffer concurrency and low-power deep-sleep modes; optimized for QSPI bus bandwidth, not sequential streaming | Select when system uses QSPI controller and prioritizes raw throughput over power efficiency or buffer-assisted streaming. |
| MX25L6433FZNI-10G | 64 Mbit standard SPI, no SRAM buffers, no RapidS™, 104 MHz max clock, 2.7–3.6 V supply only | No ultra-deep power-down (min 1 µA), no OTP register, no sector lockdown - simpler but less secure and less power-optimized | Select for cost-sensitive industrial designs where extended temperature range and basic SPI compatibility suffice without advanced security or ultra-low-power modes. |
Compared with W25Q64JWSSIQ and MX25L6433FZNI-10G, the AT45DB641E-CCUN2B-T uniquely delivers concurrent buffer operation, 400 nA deep-sleep current, and hardware-enforced sector lockdown - making it optimal for power-constrained, safety-critical, or streaming-intensive embedded storage.
Availability
AT45DB641E-CCUN2B-T is available at Aetrix Electronics and suitable for firmware storage, voice/data logging, industrial HMI, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB641E-CCUN2B-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, infrastructure, and IoT applications.
The AT45DB641E-CCUN2B-T belongs to Renesas' DataFlash® family, designed specifically for high-reliability, low-pin-count, sequential-access Flash storage in resource-constrained embedded systems requiring robust data integrity and ultra-low power operation.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB641E-CCUN2B-T?
The AT45DB641E-CCUN2B-T supports up to 85 MHz in RapidS™ mode (opcodes 0Bh/1Bh), with guaranteed 8 ns maximum clock-to-output timing. In standard SPI mode, it operates reliably at lower frequencies such as 50 MHz, but the 85 MHz specification applies only under RapidS™-enabled conditions with proper signal integrity and load capacitance control.
Does the AT45DB641E-CCUN2B-T require external high-voltage programming?
No, the AT45DB641E-CCUN2B-T does not require external high-voltage programming. All program and erase operations are self-timed and executed using only the standard 1.7 V–3.6 V VCC supply. This simplifies system design by eliminating charge pumps or dedicated programming voltages, enabling direct integration with low-voltage microcontrollers.
How does the dual-buffer architecture of the AT45DB641E-CCUN2B-T improve system performance?
The AT45DB641E-CCUN2B-T's two independent 256/264-byte SRAM buffers allow simultaneous reception of new data into one buffer while reprogramming the main memory array from the other - eliminating write stalls during continuous data streams. This interleaving is essential for real-time logging, audio buffering, and firmware streaming applications.
Can the AT45DB641E-CCUN2B-T be used in industrial temperature environments?
Yes, the AT45DB641E-CCUN2B-T is fully specified for the industrial temperature range of –40°C to +85°C. Its electrical characteristics, including timing parameters, power consumption, and endurance, are guaranteed across this range - making it suitable for deployment in motor drives, PLCs, outdoor gateways, and other harsh-environment industrial systems.
What security features does the AT45DB641E-CCUN2B-T provide beyond standard write protection?
The AT45DB641E-CCUN2B-T includes sector lockdown (permanent read-only enforcement), individual sector protection (software/hardware configurable), and a 128-byte OTP security register with 64-byte factory-unique ID. These features prevent unauthorized firmware modification, ensure calibration data immutability, and support device authentication - exceeding basic WP pin functionality.
AT45DB641E-CCUN2B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 9-UBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 64Mbit
- Memory Organization:
- 256 Bytes x 32K pages
- Memory Interface:
- SPI
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-UBGA (6x6)
AT45DB641E-CCUN2B-T FAQ
1.How can I place an order for AT45DB641E-CCUN2B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB641E-CCUN2B-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 AT45DB641E-CCUN2B-T reliable?
The price and inventory of AT45DB641E-CCUN2B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB641E-CCUN2B-T is usually 5 days.
3.What payment methods are accepted for AT45DB641E-CCUN2B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB641E-CCUN2B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB641E-CCUN2B-T?
AT45DB641E-CCUN2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB641E-CCUN2B-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 AT45DB641E-CCUN2B-T?
For technical support, including AT45DB641E-CCUN2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB641E-CCUN2B-T requirements.
6.How does Aetrix verify that AT45DB641E-CCUN2B-T is sourced from the original manufacturer or authorized distributors?
All AT45DB641E-CCUN2B-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 AT45DB641E-CCUN2B-T meets industry standards.
7.What is the process for return or replacement of AT45DB641E-CCUN2B-T?
All AT45DB641E-CCUN2B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB641E-CCUN2B-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 AT45DB641E-CCUN2B-T part is unused and in its original packaging.
Return procedure for AT45DB641E-CCUN2B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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