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Microchip Technology AT45DB041B-CC
- Part No.:
- AT45DB041B-CC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 14-LBGA, CSPBGA
- Datasheet:
-
AT45DB041B-CC.pdf
- Description:
- IC FLASH 4MBIT SPI 20MHZ 14CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,912
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Product details
Overview
AT45DB041B-CC from Microchip Technology (formerly Atmel) is a 4-Mbit serial DataFlash memory IC with SPI interface, organized as 2048 pages × 264 bytes (4,325,376 bits), featuring dual 264-byte SRAM buffers and single 2.5V–3.6V supply operation. It supports continuous array read for code shadowing, page/block erase, and self-timed buffer-to-memory programming - ideal for embedded firmware storage in resource-constrained microcontroller systems.
For engineers reviewing the AT45DB041B-CC datasheet, AT45DB041B-CC pinout, AT45DB041B-CC application, or AT45DB041B-CC equivalent, key selection considerations include its 20 MHz SPI clock support, 5.0V-tolerant control pins (CS, SCK, SI, WP, RESET), hardware write protection for first 256 pages, RDY/BUSY open-drain status signaling, and compatibility with SPI Mode 0/3 for host MCU integration.
Technical Context
The AT45DB041B-CC implements a dedicated SPI flash architecture with two independent 264-byte SRAM buffers enabling concurrent data reception and flash reprogramming - eliminating bus contention during firmware updates. Its command set includes 24 distinct opcodes for page read, buffer transfer, compare, auto-rewrite, and block-level erase operations, all managed via MSB-first serial protocol.
Memory organization follows a three-tier hierarchy: 256 sectors (8–512 pages each), 256 blocks (8 pages = 2112 bytes), and 2048 individually erasable pages (264 bytes). The device uses internal address counters for seamless page-boundary crossing during continuous reads and supports EEPROM-emulation via Read-Modify-Write sequences without external high-voltage circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,325,376 bits (2048 × 264-byte pages) - provides compact nonvolatile storage for boot code or configuration data in space-limited PCBs. |
| Supply Voltage | 2.5V–3.6V or 2.7V–3.6V - enables direct interfacing with 3.3V logic families without level shifters. |
| Max SPI Clock | 20 MHz - supports fast firmware loading and real-time data logging at up to 2.5 MB/s effective throughput. |
| Active Read Current | 4 mA typical - minimizes power draw during active code execution in battery-powered devices. |
| Standby Current | 2 µA typical - ensures ultra-low quiescent power during system sleep modes. |
| Input Tolerance | 5.0V-tolerant SI, SCK, CS, RESET, WP - simplifies mixed-voltage system design and eliminates need for external clamping diodes. |
| Operating Temp | –40°C to +85°C (industrial range) - validated for reliable operation in automotive ECUs and industrial controllers. |
Pinout & Package
AT45DB041B-CC is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard lead pitch and RoHS-compliant green finish. Pin functions are electrically defined and mechanically mapped per Figure 2-3 of the official datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal - must be held low for entire instruction sequence; high-to-low transition initiates command decoding. |
| SCK | Serial Clock | Input-only clock - rising edge latches SI data; falling edge outputs SO data; supports SPI Mode 0/3 polarity/idle configurations. |
| SI | Serial Input | Input-only data line - receives opcodes, addresses, and payload data MSB-first; tolerant to 5.0V inputs. |
| SO | Serial Output | Output-only data line - returns read data or status register bits; tri-stated when CS is high. |
| WP | Hardware Write Protect | Active-low pin - when low, prevents programming/erasing of first 256 pages (0–255); requires external pull-up if unused. |
| RESET | Chip Reset | Active-low asynchronous reset - forces internal state machine into idle mode; no external RC network required due to integrated POR. |
| RDY/BUSY | Ready/Busy Status | Open-drain output - pulled low during self-timed operations (erase, program, transfer); requires 1 kΩ external pull-up. |
| VCC / GND | Power Supply | Single 2.5–3.6V supply pair - decoupling capacitor (0.1 µF) recommended near VCC pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 264-byte buffers enable simultaneous data streaming into one buffer while reprogramming flash from the other - critical for zero-downtime firmware updates. |
| Continuous Array Read | Supports uninterrupted sequential read across full memory array with automatic page-wrap - eliminates host-side address management for boot code shadowing. |
| Self-Timed Programming | All erase and program cycles complete internally without external timing control - removes need for precise delay loops or watchdog coordination in host firmware. |
| Page-Level Erase Flexibility | Individual 264-byte pages can be erased independently - avoids full-chip erase delays and preserves valid data in adjacent pages during partial updates. |
| Hardware Page Protection | WP pin disables reprogramming of first 256 pages - protects bootloader or calibration data from accidental overwrite in field-deployed systems. |
Applications
| Firmware Storage | Industrial Data Logging |
|---|---|
Use Scenario: Storing boot loader and application firmware for ARM Cortex-M or RISC-V microcontrollers in medical diagnostic equipment. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast random-access page reads and deterministic 20 MHz SPI interface timing. Use Value: Enables secure, field-upgradable firmware without requiring external high-voltage programming circuitry or complex wear-leveling algorithms. | Use Scenario: Capturing sensor readings (temperature, pressure, vibration) in programmable logic controllers over extended duty cycles. IC Role / Device Role / Timing Role: High-reliability sequential data sink with continuous read capability and low 4 mA active current. Use Value: Supports long-term logging with minimal power impact on battery-backed systems and eliminates risk of data loss during power interruption. |
| Audio Voice Recording | IoT Edge Configuration Storage |
Use Scenario: Storing pre-recorded voice prompts and alarm tones in smart home security panels and fire alarm interfaces. IC Role / Device Role / Timing Role: Compact, low-pin-count audio sample repository accessed via SPI by audio codec peripherals. Use Value: Delivers consistent playback latency and eliminates external parallel memory buses - reducing PCB layer count and EMI emissions. | Use Scenario: Holding device-specific parameters (Wi-Fi credentials, calibration offsets, OTA update metadata) in connected lighting nodes and sensor gateways. IC Role / Device Role / Timing Role: Secure, write-protected configuration store with hardware WP pin guarding critical setup data. Use Value: Prevents corruption of network identity and operational settings during brown-out conditions or firmware update failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB041D-CC | Successor generation with enhanced reliability, same pinout and command set; supports higher endurance (100k erase/write cycles vs. 10k). | Preferred for new designs requiring longer product lifecycle and improved data retention under thermal stress. | Select AT45DB041D-CC when designing for production beyond 2025; AT45DB041B-CC remains viable for legacy repair or cost-sensitive volume builds. |
| W25Q40EWSSIG | 4-Mbit Quad SPI NOR flash (Winbond); supports faster 104 MHz QSPI, but lacks dual buffers and continuous array read mode. | Better suited for high-speed XIP (execute-in-place) applications where parallel instruction fetch matters more than streaming flexibility. | Choose W25Q40EWSSIG only if host MCU has Quad SPI peripheral and requires >20 MHz throughput; otherwise AT45DB041B-CC offers superior streaming efficiency and simpler driver implementation. |
Compared with AT45DB041D-CC, the AT45DB041B-CC has lower endurance and no enhanced data retention spec, but maintains identical software compatibility and footprint. Versus W25Q40EWSSIG, it trades raw speed for deterministic streaming behavior and built-in buffering - making it more robust for real-time embedded data pipelines where latency predictability outweighs peak bandwidth.
Availability
AT45DB041B-CC is available at Aetrix Electronics and suitable for firmware storage, industrial data logging, audio voice recording, and IoT edge configuration storage requiring stable component supply across multi-year production programs.
Supply support for AT45DB041B-CC 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 acquired Atmel in 2016 and continues to manufacture, support, and qualify legacy Atmel products including the DataFlash family.
The AT45DB041B-CC belongs to Microchip's Serial DataFlash product line, designed specifically for embedded systems needing efficient, low-pin-count nonvolatile memory with streaming-friendly architecture and simplified host firmware integration.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB041B-CC?
The AT45DB041B-CC supports a maximum SPI clock frequency of 20 MHz across all supported modes (SPI Mode 0 and Mode 3). This allows sustained data transfer rates up to 2.5 MB/s during continuous read operations. Timing compliance is guaranteed under specified VCC (2.5–3.6V) and temperature (–40°C to +85°C) conditions per the official Microchip datasheet revision 3443D–DFLSH–2/08.
Does the AT45DB041B-CC require external high-voltage programming signals?
No, the AT45DB041B-CC does not require external high-voltage programming signals. All erase and program operations are performed using only the standard 2.5V–3.6V supply voltage applied to VCC. Internal charge pumps generate necessary voltages, enabling in-system reprogrammability directly from the host MCU's SPI interface without additional power rails or programming hardware.
How does the dual-buffer architecture of the AT45DB041B-CC improve system performance?
The AT45DB041B-CC's dual 264-byte SRAM buffers allow concurrent operations: while one buffer streams incoming data from the host MCU, the other can simultaneously program a full page (264 bytes) into flash memory. This pipelining eliminates idle time between data reception and storage, enabling true zero-downtime firmware updates and continuous data logging without host CPU intervention.
Can the AT45DB041B-CC be used for EEPROM emulation, and how is it implemented?
Yes, the AT45DB041B-CC supports EEPROM emulation through a self-contained three-step Read-Modify-Write operation. Host firmware reads a page into a buffer, modifies specific bytes, then writes the updated page back to flash. Because the device handles page erase and program internally, this method avoids external wear-leveling logic and provides byte-alterable storage behavior - ideal for storing infrequently changed parameters like calibration values or user preferences.
What is the function of the RDY/BUSY pin on the AT45DB041B-CC, and how should it be used in system design?
The RDY/BUSY pin on the AT45DB041B-CC is an open-drain output that asserts low during all self-timed operations (e.g., page erase, buffer-to-memory program, page-to-buffer transfer). It must be externally pulled up with a 1 kΩ resistor. System firmware can poll this pin instead of relying on fixed delays, ensuring deterministic timing and freeing the host MCU to perform other tasks while flash operations complete - improving overall system responsiveness and resource utilization.
AT45DB041B-CC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 14-LBGA, CSPBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
- 20 MHz
- Write Cycle Time - Word, Page:
- 14ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-CBGA (4.5x7)
AT45DB041B-CC FAQ
1.How can I place an order for AT45DB041B-CC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB041B-CC 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 AT45DB041B-CC reliable?
The price and inventory of AT45DB041B-CC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB041B-CC is usually 5 days.
3.What payment methods are accepted for AT45DB041B-CC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB041B-CC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB041B-CC?
AT45DB041B-CC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB041B-CC 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 AT45DB041B-CC?
For technical support, including AT45DB041B-CC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB041B-CC requirements.
6.How does Aetrix verify that AT45DB041B-CC is sourced from the original manufacturer or authorized distributors?
All AT45DB041B-CC 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 AT45DB041B-CC meets industry standards.
7.What is the process for return or replacement of AT45DB041B-CC?
All AT45DB041B-CC units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB041B-CC, 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 AT45DB041B-CC part is unused and in its original packaging.
Return procedure for AT45DB041B-CC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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