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Microchip Technology AT25020A-10PU-2.7
- Part No.:
- AT25020A-10PU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT25020A-10PU-2.7.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,405
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Product details
Overview
AT25020A-10PU-2.7 from Microchip Technology (formerly Atmel) is a 2-kbit serial SPI EEPROM organized as 256 words × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, featuring 8-byte page write, block write protection, and JEDEC PDIP-8 packaging. It serves as nonvolatile configuration storage in industrial control modules requiring low-voltage reliability.
For engineers reviewing the AT25020A-10PU-2.7 datasheet, AT25020A-10PU-2.7 pinout, AT25020A-10PU-2.7 application, or AT25020A-10PU-2.7 equivalent, key selection criteria include VCC range (2.7–5.5V), 20 MHz max SPI clock at 5V, 8-byte page write capability, hardware WP/HOLD pins, and PDIP-8 package compatibility with legacy through-hole designs.
Technical Context
The AT25020A-10PU-2.7 implements a synchronous slave SPI interface compliant with Modes 0 and 3, using separate SI/SO lines and CS-controlled addressing. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 for 1/4, 1/2, or full array protection, and automatic address increment during page writes.
It features dual data protection: hardware via WP pin (inhibits all writes when low) and software via WREN/WRDI instructions and programmable status register bits. All write cycles are self-timed (≤5 ms), require no pre-erase, and support read-while-write status polling via RDSR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), sufficient for firmware boot flags, calibration coefficients, or device ID storage |
| VCC Range | 2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level shifting |
| Max SPI Clock | 20 MHz at 5V - enables fast parameter updates in real-time systems (e.g., motor control registers) |
| Write Cycle Time | ≤5 ms - deterministic latency for critical configuration saves; no external timeout logic required |
| Endurance | 1 million write cycles - suitable for logging applications with frequent parameter adjustments |
| Data Retention | 100 years - ensures long-term validity of stored calibration or security keys across product lifetime |
| Operating Temp | −40°C to +85°C - qualified for industrial ambient environments including factory automation panels |
Pinout & Package
AT25020A-10PU-2.7 uses an 8-lead JEDEC PDIP (package code 8P3) with 0.300" body width, RoHS-compliant green plastic housing, and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire SPI transaction; high impedance SO when CS high |
| SCK | Serial Clock Input | Master-generated clock; timing-critical input governing data sampling (Mode 0: idle low, sample on rising edge) |
| SI | Serial Data Input | Receives op-codes (e.g., WRITE, WREN), addresses, and data; MSB-first protocol |
| SO | Serial Data Output | Drives read data and status register bits; tri-stated when CS high or HOLD active |
| GND | Ground Reference | Signal and power return path; must be low-impedance to minimize noise on SPI lines |
| VCC | Power Supply | 2.7–5.5V supply; decoupling capacitor (0.1 µF) required within 10 mm of VCC/GND pins |
| WP | Write Protect | Hardware lock: pulls low to disable all write operations regardless of WREN state or status register |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting sequence; requires SCK low before assertion |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Interoperates with diverse MCUs (e.g., PIC, STM32, MSP430) without custom driver adaptation |
| 8-byte Page Write | Reduces write overhead by 8× vs. byte-wise programming; improves efficiency in burst configuration updates |
| Block Write Protection | Four protection levels (none, 1/4, 1/2, full) configurable via status register for secure parameter partitioning |
| WP + HOLD Pins | Enables robust system-level control: WP prevents accidental writes; HOLD allows safe MCU interrupt handling |
| Self-timed Writes | Eliminates need for external write-complete polling delay; RDSR bit 0 provides precise ready/busy status |
Applications
| Industrial PLC I/O Module | Medical Device Calibration Storage |
|---|---|
Use Scenario: Storing channel-specific gain/offset trim values and sensor linearization tables in modular analog input/output cards. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up initialization and field recalibration routines. Use Value: Ensures measurement accuracy across temperature and aging; 1M endurance supports >100 recalibrations/year over 10-year product life. | Use Scenario: Holding FDA-mandated calibration certificates, sensor drift compensation coefficients, and usage logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter vault with hardware WP pin physically tied to service-mode switch. Use Value: Meets IEC 62304 Class B requirements for data integrity; 100-year retention guarantees traceability throughout device service life. |
| Automotive Body Control Unit | Smart Energy Meter Firmware Settings |
Use Scenario: Storing seat/mirror position presets, lighting profiles, and door lock configurations in 12V vehicle subsystems. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 3.3V CAN microcontroller; WP pin tied to ignition signal. Use Value: Operates reliably during cold-crank (down to 2.7V); −40°C to +85°C rating matches under-hood thermal envelope. | Use Scenario: Saving tariff schedules, pulse-count thresholds, and communication parameters in utility-grade meters with 20+ year field deployment. IC Role / Device Role / Timing Role: Long-life configuration store updated infrequently but requiring absolute data integrity across power cycles. Use Value: 100-year retention eliminates field replacement due to data decay; PDIP-8 simplifies rework in high-reliability meter PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-WMN6TP | 256-Kbit capacity, 8-pin SOIC-8, 5V-only (4.5–5.5V), 20 MHz max clock | Higher density for larger configuration sets; not suitable for 2.7–3.6V systems | Select when >2 Kbit storage needed and system operates strictly at 5V |
| CAT25256VI-GT3 | 256-Kbit, TSSOP-8, 1.8–5.5V operation, 20 MHz clock, same pinout as AT25020A-10PU-2.7 in SOIC variant | Drop-in replacement only in SOIC-8 footprint; PDIP-8 users require board redesign | Choose for RoHS-compliant TSSOP layout with extended low-voltage support |
Compared with M95256-WMN6TP and CAT25256VI-GT3, the AT25020A-10PU-2.7 offers optimal balance of legacy PDIP compatibility, 2.7V minimum operation, and proven industrial reliability-making it preferred for cost-sensitive, through-hole-based control systems where density is secondary to voltage flexibility and package familiarity.
Availability
AT25020A-10PU-2.7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical calibration storage, automotive body control units, and smart energy meter firmware settings requiring stable component supply and long-term obsolescence management.
Supply support for AT25020A-10PU-2.7 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 memory solutions, with a focus on embedded control and connectivity.
The AT25020A-10PU-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for industrial and commercial systems requiring reliable, low-power, SPI-compatible nonvolatile storage in space-constrained or legacy through-hole layouts.
FAQ
What is the maximum SPI clock frequency supported by the AT25020A-10PU-2.7?
The AT25020A-10PU-2.7 supports up to 20 MHz SPI clock frequency when VCC = 5.0V, 10 MHz at 2.7–3.6V, and 5 MHz at 1.8–2.7V per AC Characteristics Table 4. This ensures compatibility with high-speed microcontrollers while maintaining timing margins across its full operating voltage range.
Does the AT25020A-10PU-2.7 require an external erase cycle before writing?
No, the AT25020A-10PU-2.7 does not require a separate erase cycle. All write operations are self-timed and automatically erase and program the target location in ≤5 ms. The device supports byte and 8-byte page writes without pre-erase, simplifying firmware implementation.
How is write protection implemented on the AT25020A-10PU-2.7?
The AT25020A-10PU-2.7 implements dual-layer write protection: hardware via the WP pin (inhibits all writes when low), and software via BP1/BP0 bits in the status register, enabling 1/4, 1/2, or full array protection. Both mechanisms operate independently and concurrently.
What package type is used by the AT25020A-10PU-2.7?
The AT25020A-10PU-2.7 uses an 8-lead JEDEC PDIP (Plastic Dual Inline Package) with 0.300" body width, designated by package code 8P3. It is RoHS-compliant, lead-free, and halogen-free, meeting industrial temperature requirements (−40°C to +85°C).
Can the AT25020A-10PU-2.7 be used in 1.8V systems?
No, the AT25020A-10PU-2.7 is rated for 2.7V to 5.5V operation only. For 1.8V systems, Microchip offers the AT25020A-10PU-1.8 variant, which shares identical functionality and pinout but is characterized down to 1.8V. Using the -2.7 version below 2.7V violates specifications and risks unreliable operation.
AT25020A-10PU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT25020A-10PU-2.7 FAQ
1.How can I place an order for AT25020A-10PU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020A-10PU-2.7 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 AT25020A-10PU-2.7 reliable?
The price and inventory of AT25020A-10PU-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25020A-10PU-2.7 is usually 5 days.
3.What payment methods are accepted for AT25020A-10PU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020A-10PU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020A-10PU-2.7?
AT25020A-10PU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020A-10PU-2.7 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 AT25020A-10PU-2.7?
For technical support, including AT25020A-10PU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020A-10PU-2.7 requirements.
6.How does Aetrix verify that AT25020A-10PU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25020A-10PU-2.7 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 AT25020A-10PU-2.7 meets industry standards.
7.What is the process for return or replacement of AT25020A-10PU-2.7?
All AT25020A-10PU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25020A-10PU-2.7, 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 AT25020A-10PU-2.7 part is unused and in its original packaging.
Return procedure for AT25020A-10PU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25020A-10PU-2.7 Tags
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