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Renesas AT45DB641E-MWHN-T
- Part No.:
- AT45DB641E-MWHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB641E-MWHN-T.pdf
- Description:
- IC FLASH 64MBIT SPI 85MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,444
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Product details
Overview
AT45DB641E-MWHN-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, 1.7–3.6 V single-supply operation, and hardware/software sector protection - used for firmware storage and real-time data logging in industrial controllers.
For engineers reviewing the AT45DB641E-MWHN-T datasheet, AT45DB641E-MWHN-T pinout, AT45DB641E-MWHN-T application, or AT45DB641E-MWHN-T equivalent, key selection considerations include RapidS™ high-speed read capability (8 ns tV), ultra-deep power-down current (400 nA typical), page size configurability (256 vs. 264 bytes), and dual-buffer interleaved programming for continuous streaming.
Technical Context
The AT45DB641E-MWHN-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 continuous array reads using opcodes 0Bh and 1Bh, achieving up to 85 MHz clock rates with sub-10 ns clock-to-output timing.
It features flexible erase granularity - page (256/264 B), block (2 KB), sector (256 KB), and full chip (64 Mbit) - plus suspend/resume for program/erase operations. Sector lockdown and 128-byte OTP security register provide tamper-resistant firmware integrity for embedded boot applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 64 Mbit main + 2 Mbit extra; organized as 32,768 pages × 256 or 264 bytes - enables firmware image storage with spare space for metadata or logs. |
| Interface | SPI-compatible, modes 0 and 3; 3-wire (CS/SI/SO/SCK) - eliminates parallel bus routing, reduces PCB layer count and EMI. |
| Max Clock Frequency | 85 MHz (RapidS™ high-frequency mode) - supports >10 MB/s sustained read throughput for audio/video buffering. |
| Power Supply | Single 1.7 V to 3.6 V - interoperable with 1.8 V and 3.3 V logic domains without level shifters. |
| Deep Power-Down | 400 nA typical current - extends battery life in always-on IoT edge nodes during idle periods. |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-upgradable devices with multi-year service life. |
| Page Size | User-configurable: 256 bytes (factory option) or 264 bytes (default) - aligns with legacy DataFlash systems or optimizes density efficiency. |
Pinout & Package
AT45DB641E-MWHN-T is packaged in an 8-pad Ultra-thin DFN (5 × 6 × 0.6 mm), RoHS-compliant, with exposed thermal pad (NC or GND). The metal pad on the bottom is not internally connected and must be isolated or tied to ground per layout guidelines.
| 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 sampling: SI latched on rising edge; SO driven on falling edge - ensures deterministic setup/hold timing. |
| SI | Serial Input | Command, address, and input data entry point; ignored when CS is high - prevents spurious command execution. |
| SO | Serial Output | Data output terminal; tri-stated when CS is high - allows multi-device SPI bus sharing without external logic. |
| WP | Write Protect | Hardware lock for sector protection registers; active-low; overrides software protection when asserted - prevents accidental firmware overwrite. |
| RESET | Hardware Reset | Active-low asynchronous reset; clears internal state and exits Deep Power-Down - enables system-level recovery without power cycle. |
| VCC | Supply Voltage | 1.7–3.6 V core and I/O supply; powers all logic and memory arrays - supports direct connection to Li-ion or regulated DC-DC outputs. |
| GND | Ground | Reference node for all signals and power; requires low-impedance connection to minimize noise coupling into sensitive SPI timing paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 256/264-byte buffers allow simultaneous receive-to-buffer and buffer-to-main-memory programming - enables zero-gap data streaming in telemetry recorders. |
| RapidS™ Operation | High-frequency continuous read mode (opcodes 0Bh/1Bh) delivers 85 MHz interface speed with 8 ns tV - reduces firmware load latency in boot-critical applications. |
| Flexible Erase Granularity | Page (256/264 B), block (2 KB), sector (256 KB), and chip (64 Mbit) erase options - minimizes wear and optimizes update time for partial firmware patches. |
| OTP Security Register | 128-byte one-time programmable register: 64 bytes factory-unique ID + 64 bytes user-programmable - supports secure device authentication and license binding. |
| Program/Erase Suspend | Allows interrupting long erase/write operations to service urgent reads - maintains real-time responsiveness in mixed-criticality systems. |
Applications
| Firmware Storage | Data Logging |
|---|---|
Use Scenario: Storing bootloader and application firmware images in microcontroller-based industrial PLCs. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access read via RapidS™ for rapid boot. Use Value: 85 MHz interface and 8 ns tV reduce boot time by >30% versus standard SPI Flash; dual buffers support background firmware validation during runtime. | Use Scenario: Continuous capture of sensor readings in battery-powered environmental monitors. IC Role / Device Role / Timing Role: High-reliability sequential data sink with ultra-low-power Deep Power-Down between samples. Use Value: 400 nA ultra-deep power-down current extends 10-year battery life; page-erase granularity minimizes write wear during frequent small-record updates. |
| Secure Boot | Audio Buffering |
Use Scenario: Verifying signed firmware images before execution in medical diagnostic equipment. IC Role / Device Role / Timing Role: Trusted storage for cryptographic keys and immutable boot code using sector lockdown and OTP registers. Use Value: Hardware-enforced sector lockdown prevents runtime modification; 64-byte factory-unique ID enables device-specific key derivation. | Use Scenario: Real-time audio playback buffering in smart speaker DSP subsystems. IC Role / Device Role / Timing Role: Low-latency, high-throughput streaming memory supporting 48 kHz/24-bit stereo streams. Use Value: Interleaved dual-buffer operation sustains >12 MB/s write rate without gaps; continuous array read avoids address overhead per sample. |
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 dual buffers, no RapidS™, 133 MHz max (quad mode), 1.7–2.0 V supply only | Lacks sequential streaming optimization; requires QSPI controller; no hardware sector lockdown | Choose for higher bandwidth in QSPI-capable hosts where buffer interleaving is unnecessary. |
| MX25L6433FZNI-10G | 64 Mbit standard SPI, 104 MHz max, no dual buffers, no RapidS™, 2.7–3.6 V supply only, no ultra-deep power-down | No low-voltage operation below 2.7 V; no sub-µA power states; no OTP security register | Choose for cost-sensitive 3.3 V-only designs where deep sleep current is not critical. |
Compared with W25Q64JWSSIQ and MX25L6433FZNI-10G, the AT45DB641E-MWHN-T uniquely delivers dual-SRAM-buffer streaming, RapidS™-accelerated reads, 1.7 V operation, and hardware-enforced sector lockdown - making it optimal for battery-powered, firmware-integrity-critical, and continuous-data applications.
Availability
AT45DB641E-MWHN-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics, battery-powered IoT sensors, and automotive infotainment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT45DB641E-MWHN-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 microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT markets.
The AT45DB641E-MWHN-T belongs to Renesas' DataFlash® family, designed specifically for high-reliability, low-pin-count, sequential-access storage in resource-constrained embedded systems demanding robust firmware integrity and ultra-low-power operation.
FAQ
What is the maximum operating frequency of the AT45DB641E-MWHN-T in RapidS™ mode?
The AT45DB641E-MWHN-T supports up to 85 MHz in RapidS™ high-frequency continuous read mode (opcodes 0Bh and 1Bh), delivering significantly faster sequential access than standard SPI Flash. This enables >10 MB/s sustained read throughput, critical for fast boot and real-time streaming applications. The AT45DB641E-MWHN-T achieves this while maintaining 8 ns clock-to-output timing (tV), ensuring precise timing margins in high-speed systems.
Does the AT45DB641E-MWHN-T support dual-buffer interleaved programming?
Yes, the AT45DB641E-MWHN-T integrates two fully independent 256/264-byte SRAM buffers that enable true interleaved operation: one buffer can accept incoming data via SI while the other simultaneously programs the main memory array. This eliminates write gaps in continuous data streams - a key advantage for AT45DB641E-MWHN-T in telemetry, audio buffering, and firmware update scenarios where uninterrupted throughput is required.
What power-saving modes does the AT45DB641E-MWHN-T offer?
The AT45DB641E-MWHN-T provides three low-power states: Standby (25 µA typical), Deep Power-Down (5 µA typical), and Ultra-Deep Power-Down (400 nA typical). Ultra-Deep Power-Down is entered via command 09h and exited by toggling CS; it's ideal for battery-powered devices needing multi-year shelf life. All modes retain data without refresh, and the AT45DB641E-MWHN-T resumes operation within microseconds upon wake-up.
Can the AT45DB641E-MWHN-T be used for secure firmware storage?
Yes, the AT45DB641E-MWHN-T includes multiple hardware security features: individual sector protection, permanent sector lockdown (making sectors read-only), and a 128-byte OTP security register with 64 bytes factory-programmed unique ID and 64 bytes user-programmable space. These features enable cryptographic key binding, anti-cloning, and tamper-resistant boot code storage - making AT45DB641E-MWHN-T suitable for medical, industrial, and automotive secure boot implementations.
What package type is used for the AT45DB641E-MWHN-T?
The AT45DB641E-MWHN-T uses an 8-pad Ultra-thin DFN package measuring 5 × 6 × 0.6 mm, with RoHS-compliant, halide-free construction. The bottom thermal pad is unconnected (NC) but may be tied to GND for improved thermal performance and mechanical stability. This compact, low-profile package supports high-density PCB layouts in space-constrained applications such as portable medical devices and wearable sensors.
AT45DB641E-MWHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 64Mbit
- Memory Organization:
- 264 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:
- 8-VDFN (6x8)
AT45DB641E-MWHN-T FAQ
1.How can I place an order for AT45DB641E-MWHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB641E-MWHN-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-MWHN-T reliable?
The price and inventory of AT45DB641E-MWHN-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-MWHN-T is usually 5 days.
3.What payment methods are accepted for AT45DB641E-MWHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB641E-MWHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB641E-MWHN-T?
AT45DB641E-MWHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB641E-MWHN-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-MWHN-T?
For technical support, including AT45DB641E-MWHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB641E-MWHN-T requirements.
6.How does Aetrix verify that AT45DB641E-MWHN-T is sourced from the original manufacturer or authorized distributors?
All AT45DB641E-MWHN-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-MWHN-T meets industry standards.
7.What is the process for return or replacement of AT45DB641E-MWHN-T?
All AT45DB641E-MWHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB641E-MWHN-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-MWHN-T part is unused and in its original packaging.
Return procedure for AT45DB641E-MWHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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