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Renesas AT45DB041E-UUN-T
- Part No.:
- AT45DB041E-UUN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UFBGA, WLCSP
- Datasheet:
-
AT45DB041E-UUN-T.pdf
- Description:
- IC FLASH 4MBIT SPI 85MHZ 8WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,578
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Product details
Overview
AT45DB041E-UUN-T from Renesas Electronics is a 4-Mbit serial DataFlash memory with dual 256/264-byte SRAM buffers, SPI interface (modes 0 and 3), RapidS™ high-speed operation up to 85 MHz, and ultra-low-power Deep Power-Down (400 nA typical). It enables continuous data streaming in embedded voice, firmware storage, and boot code applications via buffer-to-memory interleaving.
For engineers reviewing the AT45DB041E-UUN-T datasheet, AT45DB041E-UUN-T pinout, AT45DB041E-UUN-T application, or AT45DB041E-UUN-T equivalent, key selection criteria include page size configurability (256 vs. 264 bytes), sector lockdown security, program/erase suspend capability, and industrial temperature support (–40 °C to +125 °C).
Technical Context
The AT45DB041E-UUN-T implements a sequential-access Flash architecture with two independent SRAM buffers that support concurrent receive-and-program operations. Its RapidS™ mode delivers 6 ns clock-to-output timing and supports legacy and high-frequency read opcodes (0Bh, 1Bh, E8h) for flexible system timing integration.
It features hardware- and software-controlled sector protection, 128-byte OTP security register (64-byte factory UID + 64-byte user programmable), and three-tier erase granularity-page (256/264 B), block (2 kB), and sector (64 kB)-enabling precise firmware update management in resource-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 4 Mbits (2,048 × 256 or 264 bytes), plus 128 kbits extra security/OTP space |
| Supply Voltage | 1.65 V – 3.6 V single supply - enables direct interfacing with 1.8 V and 3.3 V microcontrollers without level shifters |
| Max Clock Frequency | 85 MHz (RapidS™ mode) - supports high-throughput firmware loading and audio streaming |
| Page Size | User-configurable 256 bytes or factory-default 264 bytes - determines address alignment and buffer utilization efficiency |
| Endurance | 100,000 program/erase cycles at –40 °C to +85 °C - suitable for field-upgradable embedded systems with frequent OTA updates |
| Data Retention | 20 years - ensures long-term reliability in industrial control and automotive infotainment modules |
| Deep Power-Down Current | 400 nA typical - extends battery life in always-on sensor nodes and portable medical devices |
Pinout & Package
AT45DB041E-UUN-T is packaged in an 8-pad Ultra-thin DFN (5 × 6 × 0.6 mm) with exposed thermal pad (NC or GND). Pin functions are optimized for minimal PCB footprint and noise immunity in high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; deassertion places SO in high-Z and enters standby (not Deep Power-Down) |
| SCK | Serial Clock | Input timing reference for SPI commands; supports modes 0 and 3 with 85 MHz max frequency |
| SI | Serial Input | Command/address/data input path; latched on SCK rising edge in mode 0, falling edge in mode 3 |
| SO | Serial Output | Data/command response output; tri-stated when CS is high |
| WP | Write Protect | Hardware sector lock control; low = protection enabled per Sector Protection Register settings |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to power-on state without requiring VCC cycling |
| VCC | Power Supply | 1.65–3.6 V supply; powers core logic, Flash array, and SRAM buffers |
| GND | Ground | Reference return path; bottom thermal pad may be connected to GND for improved thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers (256/264 B each) | Enables true pipelined writes: receive new data into one buffer while programming the other into Flash - eliminates write latency stalls |
| RapidS™ High-Speed Interface | 6 ns tV (clock-to-output) and 85 MHz operation - reduces firmware load time by >3× vs. standard SPI Flash at same voltage |
| Program/Erase Suspend & Resume | Allows interrupting active erase/write to service urgent reads - critical for real-time logging and telemetry buffering |
| Individual Sector Lockdown | Makes any 64 kB sector permanently read-only after freeze command - prevents accidental or malicious overwrite of bootloader or calibration data |
| 128-Byte OTP Security Register | 64-byte factory-unique ID + 64-byte user-programmable space - supports secure device authentication and license binding |
| Ultra-Deep Power-Down Mode | 400 nA typical current draw - extends shelf life and battery runtime in intermittently powered IoT edge nodes |
Applications
| Firmware Storage | Audio Data Buffering |
|---|---|
Use Scenario: Storing boot code and application firmware for ARM Cortex-M microcontrollers in industrial PLCs. IC Role / Device Role / Timing Role: Non-volatile sequential code storage with fast random-page read and rapid reprogramming capability. Use Value: Enables field firmware updates without external EEPROM or parallel Flash; 264-byte page size aligns with common MCU flash sector boundaries. |
Use Scenario: Continuous recording and playback of voice prompts in smart home hubs with limited PCB area. IC Role / Device Role / Timing Role: Dual-buffered sequential audio stream memory supporting simultaneous capture and playback. Use Value: Eliminates external FIFOs; 85 MHz RapidS™ read supports 16-bit/44.1 kHz stereo without underflow. |
| Secure Bootloader Storage | Telemetry Logging |
Use Scenario: Holding immutable bootloader and cryptographic keys in medical diagnostic equipment requiring IEC 62304 compliance. IC Role / Device Role / Timing Role: Tamper-resistant, sector-lockdown protected memory for critical startup code and UID-based attestation. Use Value: Sector lockdown + OTP register prevent unauthorized modification; 20-year retention meets regulatory archival requirements. |
Use Scenario: Long-duration environmental sensor data logging in remote wireless weather stations. IC Role / Device Role / Timing Role: Low-power sequential write memory with suspend/resume for burst-mode sampling during RF transmission gaps. Use Value: 400 nA Deep Power-Down extends 2-AA battery life to >5 years; page erase minimizes wear during cyclic logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | 4 Mbit Quad SPI (QSPI), no SRAM buffers, no RapidS™, 104 MHz max (QPI), no sector lockdown | Lacks dual-buffer interleaving and hardware sector lockdown - unsuitable for real-time streaming or secure bootloader storage | Select only if QSPI interface and higher raw throughput outweigh need for suspend/resume and tamper resistance |
| Macronix MX25L4006EM | 4 Mbit standard SPI, no SRAM buffers, no RapidS™, 75 MHz max, no OTP register or sector lockdown | No concurrent buffer operation or security features - requires external logic for E2PROM emulation or secure boot | Choose for cost-sensitive, non-security-critical applications where buffer-less page programming suffices |
Compared with W25Q40EW and MX25L4006EM, the AT45DB041E-UUN-T uniquely delivers dual-SRAM-buffered streaming, RapidS™ timing, and hardware-enforced sector lockdown - making it the only option among the three for deterministic real-time firmware updates and certified secure boot implementations.
Availability
AT45DB041E-UUN-T is available at Aetrix Electronics and suitable for firmware storage, audio buffering, and secure bootloader applications requiring stable component supply, long-term industrial temperature support, and guaranteed lifecycle continuity.
Supply support for AT45DB041E-UUN-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, and IoT markets.
The AT45DB041E-UUN-T belongs to Renesas' DataFlash® family, designed specifically for systems needing high-reliability sequential-access Flash with integrated SRAM buffers, low-voltage operation, and advanced security features for embedded firmware and media storage.
FAQ
What is the default page size configuration for the AT45DB041E-UUN-T?
The AT45DB041E-UUN-T ships with a factory-default page size of 264 bytes, but supports user reconfiguration to 256 bytes via the Buffer and Page Size Configuration command (0x3D). This setting affects addressing, buffer alignment, and command sequence length - both configurations are fully supported across all operating temperatures and voltage ranges for the AT45DB041E-UUN-T.
Does the AT45DB041E-UUN-T support hardware reset, and how does it differ from power cycling?
Yes, the AT45DB041E-UUN-T features an active-low RESET pin that asynchronously returns the device to its power-on initialization state without requiring VCC removal. Unlike power cycling, hardware reset preserves charge on internal capacitors and avoids voltage ramp delays, enabling faster recovery in systems where brown-out detection triggers controlled restarts - a key behavior confirmed in the AT45DB041E-UUN-T datasheet Section 14.
How does the AT45DB041E-UUN-T achieve concurrent read and write operations?
The AT45DB041E-UUN-T achieves concurrency using two independent 256/264-byte SRAM buffers. While one buffer transfers data to Flash (via Buffer-to-Main-Memory Page Program), the other accepts incoming serial data via SI - enabling uninterrupted streaming. This interleaving is intrinsic to the AT45DB041E-UUN-T architecture and requires no external arbitration logic.
What security mechanisms does the AT45DB041E-UUN-T provide beyond basic write protection?
Beyond WP-pin-based sector protection, the AT45DB041E-UUN-T provides sector lockdown (permanent read-only enforcement), a 128-byte OTP security register (64-byte factory UID + 64-byte user space), and freezeable sector protection registers. These features are implemented in dedicated hardware blocks and verified in the AT45DB041E-UUN-T datasheet Sections 8–9 - offering layered defense against firmware tampering and cloning.
Can the AT45DB041E-UUN-T operate reliably at 125 °C, and what derating applies?
Yes, the AT45DB041E-UUN-T is rated for full industrial operation from –40 °C to +125 °C. At +125 °C, endurance is specified at 10,000 program/erase cycles (vs. 100,000 at +85 °C), and DC/AC parameters meet datasheet limits per Table 37 and Table 39. No external derating is required - the AT45DB041E-UUN-T maintains functional integrity across this extended range.
AT45DB041E-UUN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 264 Bytes x 2048 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WLCSP (2.55x1.45)
AT45DB041E-UUN-T FAQ
1.How can I place an order for AT45DB041E-UUN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB041E-UUN-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 AT45DB041E-UUN-T reliable?
The price and inventory of AT45DB041E-UUN-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB041E-UUN-T is usually 5 days.
3.What payment methods are accepted for AT45DB041E-UUN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB041E-UUN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB041E-UUN-T?
AT45DB041E-UUN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB041E-UUN-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 AT45DB041E-UUN-T?
For technical support, including AT45DB041E-UUN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB041E-UUN-T requirements.
6.How does Aetrix verify that AT45DB041E-UUN-T is sourced from the original manufacturer or authorized distributors?
All AT45DB041E-UUN-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 AT45DB041E-UUN-T meets industry standards.
7.What is the process for return or replacement of AT45DB041E-UUN-T?
All AT45DB041E-UUN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB041E-UUN-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 AT45DB041E-UUN-T part is unused and in its original packaging.
Return procedure for AT45DB041E-UUN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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