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Microchip Technology AT45D041A-TC
- Part No.:
- AT45D041A-TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT45D041A-TC.pdf
- Description:
- IC FLASH 4MBIT SPI 15MHZ 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,695
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Product details
Overview
AT45D041A-TC from Microchip Technology is a 4.325 Mbit serial Flash memory with 2048 pages × 264 bytes, operating on a single 4.5V–5.5V supply and supporting SPI Modes 0 and 3. It integrates two 264-byte SRAM buffers for concurrent data reception during nonvolatile reprogramming and delivers 15 MHz max clock frequency with 15 mA typical active read current. It is used in digital voice, image, and embedded data logging systems requiring in-system reprogrammability without high-voltage programming.
For engineers reviewing the AT45D041A-TC datasheet, AT45D041A-TC pinout, AT45D041A-TC application, or AT45D041A-TC equivalent, key selection criteria include page-based erase/program flexibility, dual-buffer overlap capability, hardware write protection (WP), RDY/BUSY signaling, and PLCC-32/TSOP-28/SOIC-28 package compatibility across commercial and industrial temperature ranges.
Technical Context
The AT45D041A-TC implements a serial interface architecture with no parallel address/data bus, relying on opcode-driven command sequences over SI/SO/SCK/CS. Its memory is partitioned into 2048 pages (264 B/page), organized into sectors and blocks (e.g., Block = 8 pages = 2112 B), enabling page-, block-, or sector-level erasure independent of full-chip erase.
It supports four read modes (Continuous Array Read, Burst Array Read, Main Memory Page Read, Buffer Read) and nine Group A operations-including Buffer-to-Main-Memory Program with built-in erase (tEP), Auto Page Rewrite, and Page Erase-each internally self-timed and monitored via status register bit 7 (RDY/BUSY).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,325,376 bits (2048 × 264-byte pages) |
| Supply Voltage | 4.5 V to 5.5 V - enables single-rail 5 V system integration without charge pumps or auxiliary supplies |
| Max Clock Frequency | 15 MHz - supports high-throughput burst reads (fBAR) and fast command execution |
| Active Read Current | 15 mA typical - defines power budget for continuous streaming applications like voice playback |
| Standby Current | 10 µA typical - enables low-power sleep states in battery-backed data loggers |
| Interface Standard | SPI Modes 0 and 3 - ensures interoperability with standard microcontroller SPI peripherals without custom timing logic |
| Operating Temperature | –40°C to +85°C - qualifies for industrial-grade embedded deployment |
Pinout & Package
AT45D041A-TC is available in PLCC-32, TSOP-28 Type 1, and SOIC-28 packages. The "-TC" suffix denotes the TSOP-28 variant per Microchip's packaging nomenclature. Pin functions are electrically identical across packages; mechanical layout differs per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for all serial commands; falling edge initiates instruction loading |
| SCK | Serial Clock | Input-only clock; rising edge latches SI data, falling edge outputs SO data |
| SI | Serial Input | Command, address, and data input path; MSB-first, 8-bit opcodes required |
| SO | Serial Output | Read data, status register, or compare result output; tri-stated when CS high |
| WP | Hardware Write Protect | Low = lock first 256 pages; internal pull-up allows omission if unused |
| RESET | Asynchronous Reset | Low = abort ongoing operation and reset state machine; internal pull-up allows omission |
| RDY/BUSY | Open-drain Status Indicator | Pulled low during self-timed operations (erase, program, transfer); requires external 1 kΩ pull-up |
| VCC / GND | Power Supply | Single 4.5–5.5 V rail; decoupling capacitor mandatory near VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual 264-byte SRAM buffers | Enables pipelined operation: receive new data into one buffer while programming the other into Flash, eliminating write latency stalls |
| Page-program with built-in erase | Single-command (e.g., 83H/86H) page reprogramming eliminates separate erase step, simplifying firmware logic |
| Continuous Array Read | Auto-incrementing internal address counter allows uninterrupted streaming from any start address without reissuing commands |
| Hardware write protection (WP) | Physically prevents accidental overwrite of critical boot or calibration data in first 256 pages (66.5 kB) |
| Status register monitoring | Bit 7 (RDY/BUSY) and Bit 6 (Compare result) provide real-time operational feedback without polling overhead |
Applications
| Digital Voice Recorder | Industrial Data Logger |
|---|---|
Use Scenario: Embedded voice prompt storage and playback in HVAC controllers or medical devices. IC Role / Device Role / Timing Role: Nonvolatile serial storage for compressed audio frames; accessed via SPI burst reads at 15 MHz for real-time playback. Use Value: Dual-buffer architecture allows simultaneous recording of new prompts into one buffer while playing back from Flash, ensuring zero-gap audio continuity. | Use Scenario: Long-term environmental sensor data capture in remote telemetry units with limited power. IC Role / Device Role / Timing Role: High-reliability, low-power data sink for periodic timestamped samples; leverages 10 µA standby current and page-erase granularity. Use Value: Block-erase capability enables efficient overwrite of oldest sensor records without full-memory reformatting, extending effective endurance. |
| Printer Firmware Storage | POS Terminal Configuration |
Use Scenario: Storing and updating printer font sets, raster image buffers, and control firmware in networked laser printers. IC Role / Device Role / Timing Role: In-system reprogrammable code/data storage; uses Auto Page Rewrite (58H/59H) for partial firmware patching. Use Value: Hardware WP pin protects bootloader region (first 256 pages), preventing corruption during field firmware updates over USB/Ethernet. | Use Scenario: Secure storage of payment terminal configuration, encryption keys, and transaction logs in PCI-compliant retail hardware. IC Role / Device Role / Timing Role: SPI-connected secure data vault; relies on status register (bit 6) for verify-after-write integrity checks. Use Value: Main Memory Page to Buffer Compare (60H/61H) validates write integrity before committing sensitive configuration changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB041B-TC | Same density and pinout; enhanced reliability, extended endurance (100k program/erase cycles vs. 10k), and improved data retention (20 years vs. 10 years) | Preferred for new designs requiring longer field life or higher rewrite frequency | Select AT45DB041B-TC where long-term reliability and endurance outweigh legacy design continuity |
| W25Q40EWBYI | 4 Mbit Quad SPI Flash; supports 4-line I/O, DTR mode, and faster 104 MHz QPI read; no dual-buffer architecture | Better suited for high-speed code XIP or dense firmware storage, not buffer-concurrent streaming | Choose W25Q40EWBYI when system MCU supports Quad SPI and throughput >15 MB/s is required |
Compared with AT45D041A-TC, AT45DB041B-TC offers superior endurance and retention for mission-critical updates, while W25Q40EWBYI trades dual-buffer concurrency for raw read speed and interface efficiency-making each optimal for distinct firmware/data streaming trade-offs.
Availability
AT45D041A-TC is available at Aetrix Electronics and suitable for digital voice recorders, industrial data loggers, and printer firmware storage requiring stable component supply, long-lifecycle support, and drop-in compatibility with legacy Atmel/Microchip DataFlash designs.
Supply support for AT45D041A-TC 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 is a global semiconductor company specializing in microcontrollers, analog devices, Flash memory, and security ICs for embedded control applications.
The AT45D041A-TC belongs to Microchip's DataFlash® family, designed specifically for systems needing serial-interface nonvolatile memory with concurrent buffer access to eliminate write bottlenecks in streaming data applications.
FAQ
What is the memory organization of the AT45D041A-TC?
The AT45D041A-TC organizes its 4,325,376-bit capacity as 2048 pages of 264 bytes each (256 data + 8 overhead bytes). It includes two independent 264-byte SRAM buffers. This structure enables page-level programming, optional block (8-page) or page erase, and seamless overlap between buffer fill and Flash programming - a core feature distinguishing AT45D041A-TC from standard SPI Flash devices.
Does the AT45D041A-TC require high-voltage programming?
No, the AT45D041A-TC operates entirely from a single 4.5V–5.5V supply for both read and program/erase operations. It does not require external high-voltage generators or charge pumps. All programming cycles - including Buffer-to-Main-Memory with built-in erase (83H/86H) - are self-timed and executed within the normal VCC range, simplifying power design and PCB layout for AT45D041A-TC implementations.
How does the RDY/BUSY pin function on the AT45D041A-TC?
The RDY/BUSY pin on the AT45D041A-TC is an open-drain output that sinks current when the device is executing any self-timed operation (e.g., page program, block erase, buffer transfer). It remains high (via external 1 kΩ pull-up) when idle. Software can poll bit 7 of the status register or monitor this pin directly to avoid command collisions - a critical timing safeguard during AT45D041A-TC firmware updates.
Can the AT45D041A-TC be used in SPI Mode 1 or Mode 2?
No, the AT45D041A-TC explicitly supports only SPI Modes 0 and 3, as confirmed by its datasheet. Mode 0 uses CPOL=0, CPHA=0; Mode 3 uses CPOL=1, CPHA=1. Attempting Mode 1 (CPOL=0, CPHA=1) or Mode 2 (CPOL=1, CPHA=0) will result in incorrect data sampling on SI/SO. AT45D041A-TC automatically detects the inactive SCK polarity on each CS falling edge to select the correct mode.
What is the purpose of the WP pin on the AT45D041A-TC?
The WP (Write Protect) pin on the AT45D041A-TC provides hardware-level protection for the first 256 pages (66.5 kB) of main memory. When held low, it prevents page erase and program operations on those pages - safeguarding boot code or factory calibration data. The pin has an internal pull-up, so it may be left unconnected if protection is unnecessary; however, Microchip recommends driving it high externally for robustness in AT45D041A-TC deployments.
AT45D041A-TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- 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:
- 15 MHz
- Write Cycle Time - Word, Page:
- 14ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
AT45D041A-TC FAQ
1.How can I place an order for AT45D041A-TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45D041A-TC 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 AT45D041A-TC reliable?
The price and inventory of AT45D041A-TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45D041A-TC is usually 5 days.
3.What payment methods are accepted for AT45D041A-TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45D041A-TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45D041A-TC?
AT45D041A-TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45D041A-TC 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 AT45D041A-TC?
For technical support, including AT45D041A-TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45D041A-TC requirements.
6.How does Aetrix verify that AT45D041A-TC is sourced from the original manufacturer or authorized distributors?
All AT45D041A-TC 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 AT45D041A-TC meets industry standards.
7.What is the process for return or replacement of AT45D041A-TC?
All AT45D041A-TC units undergo pre-shipment inspection (PSI). If there is an issue with AT45D041A-TC, 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 AT45D041A-TC part is unused and in its original packaging.
Return procedure for AT45D041A-TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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