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Microchip Technology AT45DB1282-TI
- Part No.:
- AT45DB1282-TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT45DB1282-TI.pdf
- Description:
- IC FLASH 128MBIT SPI 40TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,003
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Product details
Overview
AT45DB1282-TI from Atmel (now Microchip) is a 128-megabit, dual-interface DataFlash memory IC supporting both RapidS™ SPI-compatible serial (up to 40 MHz) and Rapid8™ 8-bit parallel (up to 20 MHz) interfaces. It features 16,384 pages × 1,056 bytes, two 1,056-byte SRAM buffers, hardware write protection, and a 128-byte security register with unique device ID - deployed in embedded code shadowing and firmware storage applications.
For engineers reviewing the AT45DB1282-TI datasheet, AT45DB1282-TI pinout, AT45DB1282-TI application, or AT45DB1282-TI equivalent, key selection considerations include dual-interface flexibility, continuous array read capability, buffer-assisted streaming writes, 100,000 program/erase cycles per page, and industrial temperature support (–40°C to +85°C).
Technical Context
The AT45DB1282-TI implements e-STAC™ Multi-Level Cell (MLC) technology enabling 2-bit-per-cell storage for high density at low cost. Its memory architecture is organized into sectors, blocks (8 pages), and pages (1,056 bytes), with independent erase granularity at page and block levels.
It supports three operational groups: Group A (main memory access: read, program, erase) and Group B (buffer/status operations), allowing concurrent buffer loading while main memory is busy - critical for uninterrupted data streaming in real-time systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 128 Mbit (138,412,032 bits), organized as 16,384 × 1,056-byte pages |
| Supply Voltage | 2.7 V – 3.6 V single supply - eliminates need for charge pumps or auxiliary voltage rails |
| Interface Speed | RapidS™ serial: up to 40 MHz (SPI Modes 0/3 compatible ≤33 MHz); Rapid8™ 8-bit: up to 20 MHz |
| SRAM Buffers | Two independent 1,056-byte buffers - enable simultaneous receive-and-program operation |
| Endurance | 100,000 program/erase cycles per page - supports frequent firmware updates in field-deployed devices |
| Data Retention | 10 years at +85°C - validated for long-life industrial and automotive control modules |
| Security Register | 128-byte register: 64-byte user-programmable space + 64-byte factory-unique device ID |
Pinout & Package
AT45DB1282-TI is available in 44-pin TSOP (Type 1) and 48-pin CBGA packages. Pin functions are mode-dependent: SER/BYTE selects between serial (SI/SO/SCK) and 8-bit (I/O7–I/O0/CLK) interfaces. WP enables hardware page-level write protection; RDY/BUSY provides asynchronous status signaling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for all interface operations; required for command initiation and termination |
| SCK/CLK | Serial Clock / 8-bit Clock | Rising-edge input clock for serial (SCK) or parallel (CLK) data transfer; shared pin function controlled by SER/BYTE |
| SI | Serial Input | Input-only for opcodes, addresses, and data in serial mode; ignored when SER/BYTE = low |
| SO | Serial Output | Output-only for read data and status in serial mode; tri-stated when SER/BYTE = low |
| I/O7–I/O0 | 8-bit Bidirectional I/O | Shared data/address lines in parallel mode; high-impedance when SER/BYTE = high |
| WP | Hardware Write Protect | Low-active signal blocking page programming and erase - prevents accidental firmware corruption |
| RDY/BUSY | Asynchronous Status Indicator | Open-drain output reflecting internal busy state (e.g., during program/erase/transfer) |
| SER/BYTE | Interface Mode Control | High = serial interface active; low = 8-bit interface active; internally pulled high |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Array Read | Enables seamless code shadowing without address retransmission - reduces host CPU overhead and eliminates page-boundary delays |
| Dual-Buffer Architecture | Allows overlapping data reception into one buffer while programming the other into flash - sustains >95% bus utilization in streaming applications |
| Self-timed Operations | All program/erase commands complete autonomously - no external timing control or polling required beyond RDY/BUSY monitoring |
| Page-Level Erase Flexibility | Supports selective page erase (81H) or block erase (50H, 8 pages/block) - optimizes wear leveling and minimizes update latency |
| Security Register | Factory-programmed 64-byte unique ID + 64-byte one-time programmable space - enables secure boot authentication and device binding |
Applications
| Code Shadowing | Firmware Storage |
|---|---|
Use Scenario: Microcontroller executes application code directly from external memory by copying pages into internal RAM on demand. IC Role / Device Role / Timing Role: High-speed sequential read source with continuous array access and zero-latency page wraparound. Use Value: Eliminates need for large internal Flash; enables dynamic code loading with <1 µs page boundary transition delay. | Use Scenario: Field-upgradable firmware images stored in nonvolatile memory for embedded controllers in industrial PLCs. IC Role / Device Role / Timing Role: Dual-interface storage node supporting fast host-side verification (8-bit) and low-pin-count bootloader access (serial). Use Value: Reduces BOM count via shared interface logic; 100K-cycle endurance ensures >10-year field upgrade viability. |
| Audio Buffering | Secure Boot Key Storage |
Use Scenario: Voice recorder system streams PCM audio from ADC to flash while simultaneously playing back from another region. IC Role / Device Role / Timing Role: Dual-buffered streaming memory with concurrent read/write capability across independent interfaces. Use Value: Sustains full-duplex 48 kHz/16-bit audio without dropouts - enabled by buffer-to-memory transfer overlap. | Use Scenario: Secure boot loader validates firmware signature using cryptographic keys stored in protected memory. IC Role / Device Role / Timing Role: Tamper-resistant key repository leveraging factory-unique 64-byte device ID and OTP user space. Use Value: Prevents cloning and unauthorized firmware injection - keys cannot be read or rewritten after initial programming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial/parallel flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q128JVSIM | Single SPI interface only; no 8-bit parallel mode; Quad SPI support; 3V supply; 128 Mbit density | Lacks dual-interface flexibility; requires separate buffer management in host firmware | Preferred where PCB space is constrained and only SPI connectivity is needed |
| M25P128-VME6TG | Standard SPI-only NOR Flash; no SRAM buffers; 3V supply; 128 Mbit density; sector erase only | No continuous read or buffer-assisted streaming; slower page programming due to lack of internal buffers | Suitable for static configuration storage where streaming performance is not required |
Compared with W25Q128JVSIM and M25P128-VME6TG, the AT45DB1282-TI uniquely delivers concurrent serial/parallel access, integrated dual buffers for zero-gap streaming, and hardware-enforced security - making it optimal for real-time embedded systems requiring both code execution and secure firmware updates.
Availability
AT45DB1282-TI is available at Aetrix Electronics and suitable for code shadowing, firmware storage, audio buffering, and secure boot key storage requiring stable component supply, long-term lifecycle support, and industrial temperature operation.
Supply support for AT45DB1282-TI 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) is a leading provider of microcontrollers, analog, FPGA, and memory solutions, serving industrial, automotive, and communications markets with high-reliability silicon.
The AT45DB1282-TI belongs to the DataFlash® family - designed specifically for embedded systems needing high-density, low-pin-count, sequential-access nonvolatile memory with dual-interface flexibility and built-in streaming acceleration.
FAQ
What interface modes does the AT45DB1282-TI support?
The AT45DB1282-TI supports two independent interface modes: RapidS™ serial (SPI-compatible, up to 40 MHz) and Rapid8™ 8-bit parallel (up to 20 MHz), selected via the SER/BYTE pin. Both interfaces share the same memory map and command set, enabling flexible system integration - for example, connecting the serial port to a DSP and the 8-bit port to an MCU without protocol translation.
How does the AT45DB1282-TI handle continuous data streaming during programming?
The AT45DB1282-TI uses two independent 1,056-byte SRAM buffers to enable true concurrent operation: while one buffer is being written to flash (Buffer-to-Main-Memory Page Program), the other can simultaneously accept new data via serial or 8-bit interface. This eliminates dead time between transfers and sustains uninterrupted streaming - a core capability confirmed in the device's Group A/B operation mode specification.
What is the purpose and structure of the security register in the AT45DB1282-TI?
The AT45DB1282-TI includes a 128-byte security register divided into two 64-byte sections: the first is user-programmable (one-time write), and the second contains a factory-programmed unique device identifier. Accessed via opcode 77H, it supports secure boot, anti-cloning, and firmware binding - with hardware enforcement preventing overwrite of the factory ID and locking user space after programming.
Does the AT45DB1282-TI require high-voltage programming or external circuitry?
No. The AT45DB1282-TI operates entirely from a single 2.7 V – 3.6 V supply for both read and program/erase operations. All programming and erase cycles are self-timed and internally managed - eliminating the need for charge pumps, high-voltage generators, or external timing components. This simplifies power design and improves system reliability in battery-powered and industrial applications.
What is the endurance and data retention specification for the AT45DB1282-TI?
The AT45DB1282-TI guarantees 100,000 program/erase cycles per page and 10 years of data retention at +85°C. These specifications are measured and validated per JEDEC standards and apply across the full commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges - ensuring long-term reliability in demanding embedded deployments such as automotive telematics and industrial control units.
AT45DB1282-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 128Mbit
- Memory Organization:
- 1056 Bytes x 16,384 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- 50ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TSOP
AT45DB1282-TI FAQ
1.How can I place an order for AT45DB1282-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB1282-TI 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 AT45DB1282-TI reliable?
The price and inventory of AT45DB1282-TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB1282-TI is usually 5 days.
3.What payment methods are accepted for AT45DB1282-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB1282-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB1282-TI?
AT45DB1282-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB1282-TI 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 AT45DB1282-TI?
For technical support, including AT45DB1282-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB1282-TI requirements.
6.How does Aetrix verify that AT45DB1282-TI is sourced from the original manufacturer or authorized distributors?
All AT45DB1282-TI 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 AT45DB1282-TI meets industry standards.
7.What is the process for return or replacement of AT45DB1282-TI?
All AT45DB1282-TI units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB1282-TI, 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 AT45DB1282-TI part is unused and in its original packaging.
Return procedure for AT45DB1282-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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