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Microchip Technology AT25F512B-SSH-T
- Part No.:
- AT25F512B-SSH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25F512B-SSH-T.pdf
- Description:
- IC FLASH 512KBIT SPI 70MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,152
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Product details
Overview
AT25F512B-SSH-T from Microchip Technology is a 512-Kbit serial SPI Flash memory IC designed for code shadowing and data storage in embedded systems. It operates from a single 2.7V–3.6V supply, supports SPI Modes 0/3 up to 70 MHz, delivers 6 ns clock-to-output timing, and features uniform 4-Kbyte and 32-Kbyte block erase for flexible firmware/data partitioning in consumer electronics and industrial controllers.
For engineers reviewing the AT25F512B-SSH-T datasheet, AT25F512B-SSH-T pinout, AT25F512B-SSH-T application, or AT25F512B-SSH-T equivalent, key selection considerations include its 8-pin SOIC (150-mil) package, hardware write protection via WP pin, 128-byte OTP security register, 100,000 program/erase endurance, and deep power-down current of 5 µA - critical for battery-powered and space-constrained designs.
Technical Context
The AT25F512B-SSH-T implements a dedicated SPI interface with strict timing alignment: data latched on SCK rising edge (SI), output on falling edge (SO), and full support for dual-opcode Read Array (0Bh/03h) with dummy byte handling. Its internal architecture includes a 128-byte OTP register split into 64-byte user-programmable and 64-byte factory-unique segments, independent of main Flash array.
Erase operations are fully hardware-managed with three granularities - 4-Kbyte, 32-Kbyte, and full-chip - each requiring prior Write Enable (06h) and validated address alignment. Protection logic combines software-controlled BP0 bit and hardware-enforced locking via WP pin and BPL bit, enabling irreversible sector lockdown when both conditions are met.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64 Kbytes) - sufficient for boot code + configuration data in microcontroller-based systems without external RAM dependency. |
| Supply Voltage | 2.7V–3.6V - compatible with standard 3V logic families and eliminates need for charge pumps or auxiliary supplies. |
| Max Clock Frequency | 70 MHz - enables high-throughput read access with tV ≤ 6 ns, reducing CPU wait states during code execution. |
| Erase Granularity | Uniform 4-Kbyte and 32-Kbyte blocks - allows precise firmware module updates and data logging without erasing unrelated sectors. |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - meets long-life requirements for industrial firmware storage and calibration data. |
| Power Consumption | 6 mA active read current (20 MHz), 5 µA deep power-down - supports ultra-low-power sleep modes in portable and IoT endpoints. |
| OTP Security Register | 128-byte one-time programmable register (64 bytes user-writable, 64 bytes factory-unique ESN) - enables secure device identity binding and cryptographic key anchoring. |
Pinout & Package
AT25F512B-SSH-T uses an industry-standard 8-lead SOIC package (150-mil wide), RoHS-compliant and halide-free. Pin functions are electrically isolated per JEDEC SPI conventions, with no shared I/O or bidirectional pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; must transition high→low to initiate command, low→high to terminate; controls SO high-impedance state and standby entry. |
| SCK | Serial clock input | Master-generated clock; rising edge latches SI data, falling edge clocks SO data - defines all timing windows for instruction/address/data transfer. |
| SI | Serial input | Unidirectional command/address/data input path; ignored when CS is deasserted; MSB-first protocol ensures deterministic opcode decoding. |
| SO | Serial output | Unidirectional data output path; tri-stated when CS is high; outputs status, ID, or memory contents synchronized to SCK falling edge. |
| WP | Write protect input | Hardware lock control; low-active signal enabling irreversible BP0 bit locking when BPL=1 - prevents accidental firmware overwrite in field-deployed units. |
| HOLD | Communication pause input | Low-active signal suspends SPI transaction without deselecting device; requires CS=low and SCK=low to activate; preserves internal address counter state. |
| VCC | Power supply | Primary 2.7–3.6V supply rail; powers all logic, memory array, and I/O buffers; invalid voltage causes undefined behavior and potential data corruption. |
| GND | Ground reference | System ground return path; must be low-impedance connection to minimize noise coupling into sensitive analog portions of flash controller circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible erase architecture | Supports 4-Kbyte, 32-Kbyte, and full-chip erase - minimizes wasted memory space by aligning erase boundaries with actual code/data module sizes. |
| Hardware write protection | WP pin + BPL bit combination enables irreversible sector lockdown - eliminates risk of remote firmware corruption in connected devices. |
| OTP security register | 128-byte dedicated nonvolatile register (64 bytes user-programmable, 64 bytes factory-unique) - provides tamper-resistant storage for ESN, keys, or calibration constants. |
| Fast program/erase times | 2.5 ms typical page program (256 bytes), 100 ms 4-Kbyte block erase - reduces firmware update latency and improves production programming throughput. |
| Automatic error detection | EPE bit in Status Register flags failed program/erase operations - enables robust host-side recovery without manual verification overhead. |
Applications
| Consumer Remote Controls | Industrial PLC Firmware Storage |
|---|---|
|
Use Scenario: Storing IR protocol tables and button mapping logic in battery-powered universal remotes. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast random-access reads during button press response; executes shadowed code from RAM. Use Value: 70 MHz SPI interface and 6 ns tV ensure sub-100 µs command lookup latency; 5 µA deep power-down extends coin-cell life beyond 2 years. |
Use Scenario: Holding firmware images and configuration parameters in modular programmable logic controllers. IC Role / Device Role / Timing Role: Field-upgradable boot memory with hardware-locked protection against unauthorized reprogramming. Use Value: WP/BPL hardware locking prevents malicious firmware injection during maintenance; 100,000-cycle endurance supports >10 years of scheduled updates. |
| Medical Sensor Calibration Data | Automotive Body Control Module |
|
Use Scenario: Retaining sensor offset/gain coefficients and patient-specific settings across power cycles in portable diagnostics. IC Role / Device Role / Timing Role: Secure, long-retention data vault using OTP register for factory calibration and Flash array for field-adjustable parameters. Use Value: Factory-programmed 64-byte ESN segment binds calibration data to device identity; 20-year retention guarantees accuracy over product lifetime. |
Use Scenario: Storing lighting control logic and door-lock actuation sequences in automotive body electronics. IC Role / Device Role / Timing Role: Code storage with uniform 4-Kbyte erase blocks enabling independent update of lighting vs. security subsystems. Use Value: 4-Kbyte granularity avoids erasing door-lock firmware when updating LED driver code - improves OTA update reliability and reduces downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q80DVSSIG | 8-Mbit density, 104 MHz max clock, quad SPI support - higher bandwidth but larger footprint and no OTP register. | Preferred for systems needing faster code execution or QSPI bus sharing; unsuitable where OTP-based device serialization is required. | Select only if density and speed outweigh need for hardware-locked write protection and factory-unique identifiers. |
| Macronix MX25L512CM2I-12G | 512 Kbit density, 85 MHz max clock, standard SPI only, no OTP register, 2.7–3.6V supply - matches voltage and capacity but lacks security features. | Applicable where basic firmware storage suffices and ESN/key storage is handled externally; lower cost but no built-in identity binding. | Choose when budget constraints dominate and security functionality is implemented at MCU level rather than in Flash. |
Compared with W25Q80DVSSIG and MX25L512CM2I-12G, the AT25F512B-SSH-T uniquely integrates hardware write protection with OTP-based device identity - enabling secure, compact, and field-upgradeable firmware storage without external security ICs or layout changes.
Availability
AT25F512B-SSH-T is available at Aetrix Electronics and suitable for consumer remote controls, industrial PLC firmware storage, medical sensor calibration data retention, and automotive body control modules requiring stable component supply and long-term lifecycle assurance.
Supply support for AT25F512B-SSH-T 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 memory solutions, with emphasis on reliability, longevity, and embedded system integration.
The AT25F512B-SSH-T belongs to Microchip's legacy serial Flash memory product line, engineered specifically for cost-sensitive, space-constrained 3V embedded applications demanding secure, flexible, and long-life nonvolatile storage.
FAQ
What is the maximum operating frequency supported by the AT25F512B-SSH-T?
The AT25F512B-SSH-T supports a maximum operating frequency of 70 MHz for most commands including Read Array (0Bh), Block Erase, and Chip Erase. The 03h Read Array opcode is limited to 33 MHz. This 70 MHz capability enables low-latency code shadowing and fast firmware updates while maintaining signal integrity on standard PCB traces.
Does the AT25F512B-SSH-T include hardware write protection?
Yes, the AT25F512B-SSH-T includes hardware write protection via the WP pin in conjunction with the BPL bit in the Status Register. When WP is asserted low and BPL = 1, the BP0 protection bit becomes locked, preventing any software modification to the memory protection state - a critical feature for securing firmware in deployed systems.
What is the purpose and structure of the OTP security register in the AT25F512B-SSH-T?
The AT25F512B-SSH-T contains a 128-byte OTP security register: the first 64 bytes are user-programmable (one-time only), and the last 64 bytes are factory-programmed with a unique Electronic Serial Number (ESN) per device. This structure enables secure device identification and cryptographic key anchoring without relying on external security elements.
How does the erase architecture of the AT25F512B-SSH-T improve memory utilization?
The AT25F512B-SSH-T offers uniform 4-Kbyte and 32-Kbyte block erase - unlike large-sector Flash devices that waste space when small code/data modules require isolated erase regions. This granularity allows precise allocation of firmware modules and calibration data, maximizing usable density within the 512-Kbit array.
What power-saving features does the AT25F512B-SSH-T offer for battery-powered applications?
The AT25F512B-SSH-T provides deep power-down mode with typical current consumption of 5 µA, alongside 6 mA active read current at 20 MHz. Combined with fast wake-up and hardware HOLD functionality, these features enable aggressive duty-cycling in remote sensors and portable medical devices - extending battery life significantly without sacrificing responsiveness.
AT25F512B-SSH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 70 MHz
- Write Cycle Time - Word, Page:
- 15µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25F512B-SSH-T FAQ
1.How can I place an order for AT25F512B-SSH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25F512B-SSH-T 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 AT25F512B-SSH-T reliable?
The price and inventory of AT25F512B-SSH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25F512B-SSH-T is usually 5 days.
3.What payment methods are accepted for AT25F512B-SSH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25F512B-SSH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25F512B-SSH-T?
AT25F512B-SSH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25F512B-SSH-T 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 AT25F512B-SSH-T?
For technical support, including AT25F512B-SSH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25F512B-SSH-T requirements.
6.How does Aetrix verify that AT25F512B-SSH-T is sourced from the original manufacturer or authorized distributors?
All AT25F512B-SSH-T 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 AT25F512B-SSH-T meets industry standards.
7.What is the process for return or replacement of AT25F512B-SSH-T?
All AT25F512B-SSH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25F512B-SSH-T, 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 AT25F512B-SSH-T part is unused and in its original packaging.
Return procedure for AT25F512B-SSH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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