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Microchip Technology AT45D011-SC
- Part No.:
- AT45D011-SC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45D011-SC.pdf
- Description:
- IC FLASH 1MBIT SPI 15MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,801
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Product details
Overview
AT45D011-SC from Microchip Technology is a 1-Mbit, 5.0V-only serial DataFlash memory IC with SPI interface (Modes 0/3), 512 × 264-byte pages, one 264-byte SRAM buffer, and hardware page write protection. It enables in-system reprogramming for embedded data logging and firmware storage in space-constrained industrial controllers.
For engineers reviewing the AT45D011-SC datasheet, AT45D011-SC pinout, AT45D011-SC application, or AT45D011-SC equivalent, key selection considerations include its 15 MHz max SPI clock, 7 ms typical page program time, 120 µs page-to-buffer transfer, single 4.5–5.5 V supply, and TSSOP-14 package compatibility with legacy 5V systems.
Technical Context
The AT45D011-SC implements a serial flash architecture with dual-level memory organization: 512 main memory pages (264 bytes each) plus one dedicated 264-byte SRAM buffer. All program/erase operations are self-timed and require no external high-voltage programming signals.
It supports SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), uses MSB-first data framing, and features hardware-based page-level write protection via the WP pin. The RDY/BUSY open-drain output and status register (bit 7 = ready/busy) enable precise operation synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1,081,344 bits (512 pages × 264 bytes), sufficient for ~135 KB of user data storage |
| Supply Voltage | 4.5 V to 5.5 V only - not compatible with 2.7–3.6 V systems; requires stable 5V rail |
| SPI Clock Max | 15 MHz - enables up to 1.875 MB/s theoretical read throughput (8-bit data, no overhead) |
| Page Program Time | 7 ms typical - defines minimum interval between consecutive page writes |
| Page-to-Buffer Transfer | 120 µs typical - enables fast buffering of flash content before modification |
| Active Read Current | 15 mA typical at 5.5 V/15 MHz - impacts power budget in always-on logging applications |
| Standby Current | 10 µA typical - supports low-power sleep modes in battery-backed systems |
Pinout & Package
AT45D011-SC is packaged in a 14-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant, footprint size 5.0 × 6.4 mm. Pin 1 marked by beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must remain low during full instruction sequence (opcode + address + data) |
| SCK | Serial Clock | Input clock for SPI interface; supports Modes 0 and 3; max 15 MHz frequency |
| SI | Serial Input | Data input for opcodes, addresses, and buffer writes; MSB-first, sampled on SCK rising/falling per mode |
| SO | Serial Output | Tri-state data output for reads and status register; high-impedance when CS high |
| WP | Hardware Page Write Protect | Low = protects first 256 pages from programming; internal pull-up; optional connection |
| RESET | Chip Reset | Active-low reset; terminates ongoing operation and resets internal state machine; internal pull-up |
| RDY/BUSY | Ready/Busy Indicator | Open-drain output; pulled low during self-timed operations (program/erase/transfer); requires external pull-up |
| VCC | Power Supply | 4.5–5.5 V only; powers core logic and flash array; decoupling capacitor required |
| GND | Ground | Reference for all I/O and power; separate analog/digital ground not required |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle page erase + program | Eliminates separate erase step - simplifies firmware update logic and reduces latency |
| On-chip 264-byte SRAM buffer | Enables atomic page modification: read-modify-write without external RAM or host buffering |
| Hardware page write protection | Prevents accidental overwrite of critical boot or calibration data stored in first 256 pages |
| Self-timed internal timers | Removes need for host software timing loops - improves code portability and reliability |
| CMOS/TTL-compatible I/O | Direct interfacing with 5V microcontrollers (e.g., legacy 8051, PIC18, AVR) without level shifters |
Applications
| Industrial Data Logger | Digital Voice Recorder |
|---|---|
Use Scenario: Continuous timestamped sensor readings (temperature, pressure) stored for later retrieval via RS-485 or USB. IC Role / Device Role / Timing Role: Nonvolatile data sink with deterministic write latency; buffers incoming samples while flash page programming occurs. Use Value: 7 ms page program time enables >140 Hz sample rate per page; 10 µA standby current extends battery life in unattended deployments. |
Use Scenario: Standalone voice memo device capturing 8-bit PCM audio at 8 kHz sampling rate. IC Role / Device Role / Timing Role: Sequential audio frame storage using main memory page read/write; SRAM buffer used for real-time playback streaming. Use Value: 120 µs page-to-buffer transfer allows gapless playback; 15 MHz SPI supports sustained 1.2 MB/s read throughput for stereo playback. |
| Firmware Configuration Store | Embedded HMI Parameter Bank |
Use Scenario: Storing user-configurable parameters (baud rate, alarm thresholds, calibration offsets) in HVAC controller. IC Role / Device Role / Timing Role: EEPROM replacement with higher endurance; WP pin locks factory defaults in first 256 pages. Use Value: Hardware write protection prevents corruption during brown-out or reset; single 5V supply eliminates need for charge pump or auxiliary regulator. |
Use Scenario: Touchscreen HMI storing localized language strings, icon bitmaps, and screen layout definitions. IC Role / Device Role / Timing Role: Mass storage for static assets; accessed via SPI DMA from ARM Cortex-M host MCU. Use Value: TSSOP-14 package fits tight PCB layouts; 512-page granularity allows sectorized updates without full device erase. |
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-SC | 2.7–3.6 V operation, 1 Mbit density, same pinout and command set; adds deep power-down mode (1 µA) | Required for 3.3 V systems; not pin-compatible with 5V-only AT45D011-SC due to voltage domain mismatch | Select AT45DB011B-SC for new designs targeting 3.3 V platforms; AT45D011-SC remains valid for legacy 5V industrial hardware. |
| W25X10CLSNIG | 1 Mbit SPI NOR flash, 2.7–3.6 V, 8-pin SOIC, no integrated SRAM buffer, standard JEDEC commands | Lacks on-chip buffer and DataFlash-specific commands (e.g., page-to-buffer transfer); requires external buffering logic | Choose W25X10CLSNIG where JEDEC compliance and lowest cost are prioritized over atomic page rewrite capability. |
Compared with AT45DB011B-SC and W25X10CLSNIG, the AT45D011-Sc provides unique 5V-only operation with integrated SRAM buffer and single-cycle page reprogram - making it irreplaceable in legacy 5V systems requiring hardware-protected, buffer-assisted flash updates without voltage translation.
Availability
AT45D011-SC is available at Aetrix Electronics and suitable for industrial data loggers, digital voice recorders, firmware configuration stores, and embedded HMI parameter banks requiring stable component supply across extended temperature ranges.
Supply support for AT45D011-SC 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer applications.
The AT45D011-SC belongs to Microchip's DataFlash family - designed specifically for embedded systems needing reliable, low-pin-count serial flash with integrated data buffering and in-system reprogrammability at 5V.
FAQ
What is the operating voltage range for the AT45D011-SC?
The AT45D011-SC operates exclusively from a 4.5 V to 5.5 V supply. It is not rated for 3.3 V or lower operation. This 5V-only specification ensures compatibility with legacy industrial microcontrollers and avoids level-shifting complexity, but precludes use in modern low-voltage embedded systems. Always verify VCC stability within this window during active programming cycles.
Does the AT45D011-SC support SPI Mode 0 and Mode 3 simultaneously?
Yes, the AT45D011-SC automatically detects SPI mode on each CS falling edge by sampling the idle SCK state - supporting both Mode 0 (SCK idle low) and Mode 3 (SCK idle high) without configuration. This dual-mode capability simplifies integration with diverse host MCUs and eliminates mode-setting registers or firmware initialization overhead for the AT45D011-SC.
How does the hardware page write protect (WP) pin function on the AT45D011-SC?
When the WP pin is driven low, the AT45D011-SC prevents programming or erasing of the first 256 pages (pages 0–255). Pages 256–511 remain fully writable. The WP pin has an internal pull-up, so it may be left unconnected if protection is unnecessary. For robust protection, drive WP high externally during normal operation and pull low only when safeguarding critical data in the AT45D011-SC's protected zone.
What is the purpose of the 264-byte SRAM buffer in the AT45D011-SC?
The AT45D011-SC's 264-byte SRAM buffer enables atomic page modifications: a full page can be read into the buffer, altered in-place, and written back - all without external RAM. This eliminates race conditions during partial-page updates and supports features like Auto Page Rewrite (opcode 58H). The buffer is essential for reliable firmware patching and parameter editing in resource-constrained systems using the AT45D011-SC.
Can the AT45D011-SC be used in industrial temperature environments?
Yes, the AT45D011-SC variant with suffix "-SI" is rated for –40°C to +85°C operation, and the "-SC" variant is rated for 0°C to +70°C. Both meet industrial-grade reliability requirements including 100,000 program/erase cycles per page and 20-year data retention at rated temperature. Confirm the specific suffix (e.g., AT45D011-SI) matches your thermal environment when specifying the AT45D011-SC for deployment.
AT45D011-SC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45D011-SC FAQ
1.How can I place an order for AT45D011-SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45D011-SC 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-SC reliable?
The price and inventory of AT45D011-SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45D011-SC is usually 5 days.
3.What payment methods are accepted for AT45D011-SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45D011-SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45D011-SC?
AT45D011-SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45D011-SC 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-SC?
For technical support, including AT45D011-SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45D011-SC requirements.
6.How does Aetrix verify that AT45D011-SC is sourced from the original manufacturer or authorized distributors?
All AT45D011-SC 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-SC meets industry standards.
7.What is the process for return or replacement of AT45D011-SC?
All AT45D011-SC units undergo pre-shipment inspection (PSI). If there is an issue with AT45D011-SC, 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-SC part is unused and in its original packaging.
Return procedure for AT45D011-SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT45D011-SC Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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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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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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