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Microchip Technology AT45D011-SI
- Part No.:
- AT45D011-SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45D011-SI.pdf
- Description:
- IC FLASH 1MBIT SPI 15MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,707
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Product details
Overview
AT45D011-SI from Microchip Technology is a 1-Mbit, 5.0V-only serial DataFlash memory organized as 512 pages × 264 bytes, featuring an integrated 264-byte SRAM buffer, SPI-compatible interface (Modes 0 and 3), 15 MHz max clock, and hardware page write protection. It enables in-system reprogramming for digital voice, image, and embedded data logging applications without high-voltage programming.
For engineers reviewing the AT45D011-SI datasheet, AT45D011-SI pinout, AT45D011-SI application, or AT45D011-SI equivalent, key selection considerations include its 512-page × 264-byte architecture, single 4.5–5.5 V supply, 7 ms typical page program time, 120 µs page-to-buffer transfer, and industrial temperature range (−40°C to +85°C).
Technical Context
The AT45D011-SI implements a serial flash architecture with hierarchical memory granularity-pages (264 B), blocks (8 pages = 2112 B), and sectors-and supports both page-level and block-level erase operations. Its dual-mode SPI interface (Mode 0/3) allows flexible host controller integration while maintaining CMOS/TTL compatibility on all I/O pins.
Operation relies on opcode-driven command sequences (e.g., 52H for main memory read, 83H for buffer-to-flash program with built-in erase), with all timing self-controlled via internal timers. The RDY/BUSY pin and status register bit 7 provide real-time busy indication during internally timed operations including page program (tP ≤ 15 ms), block erase (tBE ≤ 15 ms), and page-to-buffer transfer (tXFR ≤ 200 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1,081,344 bits (512 pages × 264 bytes); supports sequential or random-access data storage without address bus. |
| Supply Voltage | 4.5 V to 5.5 V only; eliminates need for voltage translators or dual supplies in 5 V systems. |
| Interface | SPI-compatible (Modes 0 and 3); uses 3-wire serial interface (CS, SCK, SI/SO) reducing PCB routing complexity. |
| Page Program Time | 7 ms typical; enables fast firmware/data updates in embedded logging and voice recorders. |
| Page-to-Buffer Transfer | 120 µs typical; accelerates read-modify-write cycles by moving full 264-byte pages into SRAM buffer. |
| Operating Temperature | −40°C to +85°C (industrial grade); qualified for use in automotive body control, industrial HMI, and outdoor IoT nodes. |
| Active Read Current | 15 mA typical at 15 MHz; balances speed and power in battery-backed or energy-constrained systems. |
Pinout & Package
AT45D011-SI is available in 14-lead TSSOP (14X) package with exposed pad not connected. Pin functions are electrically defined and validated per Microchip's Rev. 1123C–01/01 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command initiation; must remain low during full instruction sequence (opcode + address + data). |
| SCK | Serial Clock | Master-generated clock up to 15 MHz; polarity/phase configurable for SPI Mode 0 (CPOL=0, CPHA=0) or Mode 3 (CPOL=1, CPHA=1). |
| SI | Serial Input | Input for opcodes, addresses, and write data (MSB-first); sampled on SCK rising edge in Mode 0, falling edge in Mode 3. |
| SO | Serial Output | Tri-state output for read data and status register; driven only when CS is low and operation is active. |
| WP | Hardware Page Write Protect | Low-active signal blocking reprogramming of first 256 pages; internally pulled high-optional external tie-high for robustness. |
| RESET | Chip Reset | Asynchronous reset of internal state machine; required recovery time tREC = 1 µs after high assertion. |
| RDY/BUSY | Open-Drain Status Indicator | Drives low during self-timed operations (program/erase/transfer); requires external pull-up for proper logic level. |
| VCC / GND | Power Supply | Single 4.5–5.5 V supply; decoupling capacitor recommended near VCC pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle page erase + program | Eliminates separate erase step: 83H command erases target page then writes buffer contents in one atomic operation (tEP ≤ 20 ms). |
| Dedicated 264-byte SRAM buffer | Enables efficient read-modify-write workflows-e.g., load page → modify bytes → write back-without host RAM overhead. |
| Page and block erase options | Supports fine-grained (page) or bulk (block = 8 pages) erasure, optimizing wear leveling and update latency for different data patterns. |
| Hardware write protection | WP pin locks first 256 pages against accidental overwrite-critical for boot code or calibration data storage. |
| Internal program/control timer | Removes need for host-side timing management: all erase, program, and transfer operations complete autonomously. |
Applications
| Digital Voice Recorder | Industrial Data Logger |
|---|---|
Use Scenario: Standalone portable recorder capturing audio clips up to several minutes using μ-law compression. IC Role / Device Role / Timing Role: Nonvolatile storage for compressed voice frames; accessed sequentially via SPI during playback/recording. Use Value: 264-byte page size aligns with typical audio frame boundaries; 7 ms program time enables real-time buffering without dropouts. |
Use Scenario: Remote sensor node logging temperature, pressure, and humidity every 10 seconds for 30 days. IC Role / Device Role / Timing Role: Circular buffer for timestamped sensor records; wear-leveling managed via block-erase rotation. Use Value: Block erase (tBE ≤ 15 ms) clears 2112-byte segments rapidly; industrial temp rating ensures reliability in uncontrolled enclosures. |
| Embedded GUI Configuration Store | Medical Device Calibration Archive |
Use Scenario: Touchscreen HMI storing user preferences, display themes, and language packs across multiple firmware versions. IC Role / Device Role / Timing Role: Parameter storage accessed on boot and during settings changes; isolated from main application flash. Use Value: Hardware WP pin protects factory-default configuration pages (0–255) from field updates while allowing user pages (256–511) to be modified. |
Use Scenario: Portable diagnostic instrument retaining multi-point calibration coefficients and audit logs per device usage cycle. IC Role / Device Role / Timing Role: Tamper-resistant archive with deterministic write timing for regulatory traceability. Use Value: Status register bit 7 provides precise busy signaling for compliance-critical write confirmation; 120 µs buffer transfer enables rapid coefficient loading pre-measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB011B | 2.7–3.6 V operation, 1 Mbit density, same pinout and command set; adds deep power-down mode (1 µA). | Required for battery-powered designs where 5 V rail is unavailable; not suitable for legacy 5 V systems. | Select AT45DB011B for new designs targeting lower voltage operation and extended battery life. |
| W25X10CL | 3 V operation, 1 Mbit, standard SPI (no buffer), no built-in erase+program; faster clock (25 MHz), smaller SOIC-8 package. | Lacks SRAM buffer and auto-erase functionality-requires host-managed erase before program; better for simple code storage. | Choose W25X10CL when bufferless architecture and minimal footprint outweigh need for atomic page rewrites. |
Compared with AT45D011-SI, AT45DB011B enables lower-voltage operation but sacrifices 5 V compatibility, while W25X10CL reduces size and cost at the expense of buffer-assisted programming efficiency and 5 V support.
Availability
AT45D011-SI is available at Aetrix Electronics and suitable for industrial data loggers, medical device calibration archives, digital voice recorders, and embedded GUI configuration stores requiring stable component supply across extended temperature ranges.
Supply support for AT45D011-SI 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, and nonvolatile memory solutions with emphasis on reliability and long-term product availability.
The AT45D011-SI belongs to the DataFlash family-designed specifically for embedded systems needing high-density serial flash with integrated SRAM buffers to simplify firmware and data storage architecture.
FAQ
What is the operating voltage range for the AT45D011-SI?
The AT45D011-SI operates exclusively from a single 4.5 V to 5.5 V supply. It is not compatible with 3.3 V or mixed-voltage systems. This 5 V-only design eliminates level-shifting requirements in legacy 5 V microcontroller platforms and ensures consistent timing margins across the specified industrial temperature range (−40°C to +85°C). The AT45D011-SI datasheet confirms no operation below 4.5 V.
Does the AT45D011-SI support SPI Mode 0 and Mode 3 simultaneously?
Yes-the AT45D011-SI automatically detects SPI mode on each CS falling edge by sampling the inactive SCK state, supporting both Mode 0 (SCK idle low) and Mode 3 (SCK idle high) without configuration registers. This dual-mode capability allows seamless integration with diverse host controllers, including legacy 8051 derivatives and modern ARM-based MCUs. The AT45D011-SI maintains full timing compliance (tSU, tH, tV) in both modes per datasheet AC characteristics.
How does the hardware write protect (WP) pin function on the AT45D011-SI?
When pulled low, the WP pin on the AT45D011-SI permanently disables programming and erasure of pages 0 through 255-protecting critical firmware or calibration data. Pages 256–511 remain fully writable. The pin is internally pulled high, so leaving it unconnected defaults to unprotected operation. For robust protection, Microchip recommends externally tying WP to VCC via a 10 kΩ resistor. This behavior is verified in the AT45D011-SI pin function table and DC characteristics section.
What is the purpose of the 264-byte SRAM buffer in the AT45D011-SI?
The AT45D011-SI's dedicated 264-byte SRAM buffer enables atomic read-modify-write operations without host RAM involvement: a full page can be transferred into the buffer (120 µs), modified, then written back to flash with built-in erase (83H command). This eliminates multi-step host-managed erase-program sequences, reduces software complexity, and prevents data corruption during power loss. The buffer size exactly matches the page size, ensuring zero-padding or truncation is unnecessary.
Can the AT45D011-SI be used in place of the AT45DB011B?
No-the AT45D011-SI and AT45DB011B are not interchangeable due to incompatible supply voltage ranges: AT45D011-SI requires 4.5–5.5 V, while AT45DB011B operates at 2.7–3.6 V. Substituting either part into the other's circuit risks damage or functional failure. Microchip explicitly recommends AT45DB011B for new designs, but the AT45D011-SI remains valid for existing 5 V systems requiring industrial temperature support and proven field reliability.
AT45D011-SI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 1Mbit
- Memory Organization:
- 264 Bytes x 512 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 15 MHz
- Write Cycle Time - Word, Page:
- 15ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45D011-SI FAQ
1.How can I place an order for AT45D011-SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45D011-SI 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 AT45D011-SI reliable?
The price and inventory of AT45D011-SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45D011-SI is usually 5 days.
3.What payment methods are accepted for AT45D011-SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45D011-SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45D011-SI?
AT45D011-SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45D011-SI 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 AT45D011-SI?
For technical support, including AT45D011-SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45D011-SI requirements.
6.How does Aetrix verify that AT45D011-SI is sourced from the original manufacturer or authorized distributors?
All AT45D011-SI 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 AT45D011-SI meets industry standards.
7.What is the process for return or replacement of AT45D011-SI?
All AT45D011-SI units undergo pre-shipment inspection (PSI). If there is an issue with AT45D011-SI, 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 AT45D011-SI part is unused and in its original packaging.
Return procedure for AT45D011-SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT45D011-SI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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