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Microchip Technology AT45DB011-JI
- Part No.:
- AT45DB011-JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT45DB011-JI.pdf
- Description:
- IC FLASH 1MBIT SPI 15MHZ 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,720
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Product details
Overview
AT45DB011-JI from Microchip Technology is a 1-Mbit (1,081,344-bit), 2.7V-only serial DataFlash memory organized as 512 pages × 264 bytes, featuring an integrated 264-byte SRAM buffer, SPI-compatible interface (Modes 0 and 3), and hardware page write protection. It enables in-system reprogramming for embedded data logging, firmware storage, and voice/image buffering in industrial temperature-range applications.
For engineers reviewing the AT45DB011-JI datasheet, AT45DB011-JI pinout, AT45DB011-JI application, or AT45DB011-JI equivalent, key selection criteria include its 13 MHz max SPI clock, 7 ms typical page program time, 120 µs page-to-buffer transfer, 2 µA standby current, and TSSOP/PLCC/SOIC package options with industrial-grade (-40°C to +85°C) operation.
Technical Context
The AT45DB011-JI implements a serial flash architecture with dual-level memory hierarchy: main array (512 × 264 B) and single 264-byte SRAM buffer. All operations-including page program, block erase, and page-to-buffer transfer-are internally self-timed with no external high-voltage programming required.
It supports SPI Modes 0 and 3 via CS/SCK/SI/SO signals, uses MSB-first data framing, and provides status register polling (RDY/BUSY bit 7) and hardware write protection via the WP pin. The device defaults to SPI Mode 3 on power-up or reset and includes internal power-on reset circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1,081,344 bits (512 pages × 264 bytes) |
| Supply Voltage | 2.7V–3.6V single supply - eliminates need for charge pumps or dual rails |
| SPI Clock Max | 13 MHz - supports high-throughput data streaming in real-time systems |
| Page Program Time | 7 ms typical - enables rapid field updates without long blocking delays |
| Page-to-Buffer Transfer | 120 µs typical - accelerates read-modify-write cycles for partial-page updates |
| Standby Current | 2 µA typical - critical for battery-powered or energy-harvesting designs |
| Operating Temp | -40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor IoT |
Pinout & Package
AT45DB011-JI is available in 14-lead TSSOP (14X), 8-lead SOIC (8S2), and 32-lead PLCC (32J) packages. The JI suffix denotes industrial temperature grade (-40°C to +85°C). Pin functions are identical across packages; NC pins are not connected and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command initiation; must be held low during opcode/address/data transfer |
| SCK | Serial Clock | Master-generated clock; determines SPI mode (Mode 0: idle low; Mode 3: idle high) |
| SI | Serial Input | Command opcodes, addresses, and write data entered MSB-first on SCK rising edge (Mode 0) or falling edge (Mode 3) |
| SO | Serial Output | Read data and status register bits output MSB-first; tri-stated when CS is high |
| WP | Hardware Write Protect | Low = protects first 256 pages from reprogramming; internally pulled high - optional external tie-high |
| RESET | Chip Reset | Active-low asynchronous reset; terminates ongoing operation and returns state machine to idle |
| RDY/BUSY | Open-drain status indicator | Pulled low during self-timed operations (program/erase/transfer); requires external pull-up resistor |
| VCC / GND | Power supply | 2.7–3.6V core supply; decoupling capacitor (0.1 µF) recommended near VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle page program with built-in erase | Combines erase + write in one 83H command - eliminates separate erase step and simplifies firmware logic |
| SRAM data buffer | 264-byte dedicated buffer enables non-blocking read-modify-write and reduces host CPU overhead |
| Page-to-buffer compare | 60H command validates flash contents against buffer data - ensures integrity before overwriting |
| Hardware page write protection | WP pin disables programming of first 256 pages - prevents accidental corruption of boot or configuration data |
| Auto Page Rewrite | 58H command safely updates fragmented data within a page - maintains sector endurance by avoiding partial writes |
Applications
| Industrial Data Logger | Firmware Storage for MCU |
|---|---|
Use Scenario: Continuous timestamped sensor readings (temperature, pressure, vibration) stored in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile data sink with deterministic 7 ms page writes and 2 µA sleep current; RDY/BUSY pin synchronizes host polling. Use Value: Enables reliable 10+ year data retention at -40°C to +85°C without backup batteries or complex wear-leveling firmware. | Use Scenario: Storing bootloader, application code, and configuration parameters for microcontrollers in field-deployed equipment. IC Role / Device Role / Timing Role: SPI-accessible code repository supporting in-field firmware updates via UART/USB bridge; 13 MHz clock allows fast image loading. Use Value: Eliminates need for parallel NOR flash - reduces PCB layer count and EMI emissions while maintaining secure, protected update paths. |
| Digital Voice Recorder | Image Buffer for Embedded Vision |
Use Scenario: Recording and playback of voice prompts, alarms, or diagnostic audio in medical devices and building automation panels. IC Role / Device Role / Timing Role: Sequential-access audio storage using page-read and page-program; 264-byte buffer absorbs sample-rate jitter between ADC and flash. Use Value: Achieves >120 seconds of 8-bit PCM at 8 kHz using only 512 pages - no external RAM required for real-time buffering. | Use Scenario: Temporary frame storage for low-resolution thermal or IR imaging modules in portable inspection tools. IC Role / Device Role / Timing Role: High-speed image capture buffer interfaced via SPI DMA; page-to-buffer transfer (120 µs) enables pipelined acquisition. Use Value: Supports 320×240 monochrome frames at 5 fps using direct memory-mapped reads - avoids costly SDRAM controller integration. |
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-JI | Successor with enhanced reliability, improved tEP (page erase+program) spec, and updated qualification testing | Same pinout and command set; recommended for new designs per Microchip documentation | Select AT45DB011B-JI for production ramp; AT45DB011-JI remains valid for legacy repair or obsolescence management |
| W25Q80DVSSIG | 8-Mbit SPI NOR flash; quad I/O capable; no internal SRAM buffer; different command set and timing | Lacks page-to-buffer transfer and auto-rewrite; requires external buffer management in host firmware | Choose W25Q80DVSSIG only if higher density and quad-speed read are prioritized over DataFlash-specific features |
Compared with AT45DB011B-JI, the AT45DB011-JI lacks updated endurance specs but retains full functional compatibility; versus W25Q80DVSSIG, it trades density and speed for integrated buffer efficiency and simplified in-system reprogramming logic.
Availability
AT45DB011-JI is available at Aetrix Electronics and suitable for industrial data loggers, firmware storage subsystems, and digital voice recorders requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT45DB011-JI 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 components, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT45DB011-JI belongs to Microchip's DataFlash family, designed specifically for embedded systems needing efficient, low-pin-count serial flash with integrated SRAM buffers to simplify firmware development and reduce system-level complexity.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB011-JI?
The AT45DB011-JI supports a maximum SCK frequency of 13 MHz under standard operating conditions (VCC = 2.7–3.6 V, TA = -40°C to +85°C). This value is specified in the AC Characteristics table and validated across the full industrial temperature range. Exceeding 13 MHz may result in timing violations during read/write operations. The AT45DB011-JI does not support quad or dual SPI modes - only standard single-data-rate SPI in Modes 0 and 3.
Does the AT45DB011-JI require a high-voltage programming supply?
No, the AT45DB011-JI operates entirely from its 2.7–3.6 V VCC supply for both read and program/erase operations. All internal high-voltage generation is handled by on-chip charge pumps, eliminating the need for external VPP pins or voltage translators. This simplifies power design and enables true single-supply in-system reprogramming - a core feature confirmed in the device description and electrical specifications of the AT45DB011-JI datasheet.
How does the hardware write protection (WP pin) function on the AT45DB011-JI?
When the WP pin is driven low, the AT45DB011-JI prevents programming or erasing of the first 256 pages (pages 0–255) of main memory. Pages 256–511 remain fully writable. The WP pin is internally pulled high, so leaving it unconnected enables full memory access. For robust protection, Microchip recommends externally tying WP to VCC through a 10 kΩ resistor. This behavior is electrically verified and documented in the "Hardware Page Write Protect" section of the AT45DB011-JI datasheet.
What is the purpose of the 264-byte SRAM buffer in the AT45DB011-JI?
The 264-byte SRAM buffer in the AT45DB011-JI serves three primary functions: (1) staging data for page programming via 83H/88H commands, (2) enabling fast page-to-buffer transfers (53H) for read-modify-write sequences, and (3) supporting buffer-only reads (54H) and comparisons (60H). It eliminates the need for external RAM in many embedded applications and reduces host processor overhead - a defining architectural feature of the AT45DB011-JI DataFlash family.
Can the AT45DB011-JI be used in SPI Mode 1 or Mode 2?
No, the AT45DB011-JI explicitly supports only SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as stated in the Features list and confirmed in the "Power-on/Reset State" section. Mode 1 (CPOL = 0, CPHA = 1) and Mode 2 (CPOL = 1, CPHA = 0) are not compatible due to timing requirements for SI sampling and SO output enable. Attempting to use unsupported modes will result in corrupted command decoding or data transfer failures on the AT45DB011-JI.
AT45DB011-JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT45DB011-JI FAQ
1.How can I place an order for AT45DB011-JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB011-JI 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 AT45DB011-JI reliable?
The price and inventory of AT45DB011-JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB011-JI is usually 5 days.
3.What payment methods are accepted for AT45DB011-JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB011-JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB011-JI?
AT45DB011-JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB011-JI 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 AT45DB011-JI?
For technical support, including AT45DB011-JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB011-JI requirements.
6.How does Aetrix verify that AT45DB011-JI is sourced from the original manufacturer or authorized distributors?
All AT45DB011-JI 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 AT45DB011-JI meets industry standards.
7.What is the process for return or replacement of AT45DB011-JI?
All AT45DB011-JI units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB011-JI, 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 AT45DB011-JI part is unused and in its original packaging.
Return procedure for AT45DB011-JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT45DB011-JI Tags
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