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Microchip Technology AT24C08A-10PI-2.5
- Part No.:
- AT24C08A-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C08A-10PI-2.5.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,363
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Product details
Overview
AT24C08A-10PI-2.5 from Microchip Technology (formerly Atmel) is an 8K-bit (1024 × 8) I²C-compatible serial EEPROM with hardware write protection, operating across 2.5V to 5.5V supply range and rated for industrial temperature (–40°C to +85°C). It features 16-byte page write capability, 100 kHz I²C bus speed at 2.5V, 1 million write cycles endurance, and 100-year data retention - deployed in embedded systems requiring nonvolatile parameter storage under constrained voltage and thermal conditions.
For engineers reviewing the AT24C08A-10PI-2.5 datasheet, AT24C08A-10PI-2.5 pinout, AT24C08A-10PI-2.5 application, or AT24C08A-10PI-2.5 equivalent, key selection considerations include its 2.5V minimum VCC support, A2-only device addressing (A0/A1 = NC), WP-enabled hardware lock, 8-pin PDIP package, and compatibility with microcontroller I²C peripherals in space- and power-sensitive designs.
Technical Context
The AT24C08A-10PI-2.5 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its internal memory is organized into four 256-page blocks of 4 bytes each, requiring a 10-bit word address for random access.
Write protection is enforced via the WP pin: when tied to VCC, the full 8K array is locked against writes; when grounded, standard read/write operations proceed. Device addressing uses only the A2 pin (A0 and A1 are no-connect), enabling up to two AT24C08A devices on a shared I²C bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8192 bits (1024 × 8), supporting firmware configuration, calibration data, and event logs in resource-limited systems |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V/5V microcontrollers without level-shifting |
| I²C Clock Frequency | 100 kHz max at 2.5V - ensures reliable timing margin in low-voltage industrial environments |
| Page Write Capacity | 16-byte pages - reduces I²C transaction count during bulk parameter updates, improving system efficiency |
| Write Cycle Time | 10 ms maximum - defines worst-case latency before next command can be issued after a write |
| Endurance & Retention | 1 million write cycles / 100 years data retention - supports long-life deployments in metering and industrial control |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade operation without derating |
Pinout & Package
AT24C08A-10PI-2.5 is supplied in an 8-lead PDIP package (JEDEC MS-001 BA, 0.300" wide), suitable for through-hole prototyping and legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | No-connect for AT24C08A; must be left floating or grounded - not used in address decoding |
| A1 | Device Address Input | No-connect for AT24C08A; unused in 2-device addressing scheme |
| A2 | Device Address Input | Hardwired address bit - determines one of two possible I²C slave addresses (0x50 or 0x51) |
| GND | Ground Reference | Return path for VCC and signal logic; requires low-impedance connection to system ground plane |
| VCC | Power Supply | 2.5V–5.5V input; decoupling capacitor (0.1 µF) required within 10 mm of pin |
| WP | Write Protect Control | Active-high hardware lock - ties to VCC to freeze memory contents during power-up or fault conditions |
| SCL | Serial Clock Input | Master-generated clock; Schmitt-triggered with 100 ns noise suppression - tolerant of slow-rising bus signals |
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up resistor (typically 2.2–10 kΩ) to VCC |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin disables all write operations when pulled high - prevents accidental overwrites during brown-out or software faults |
| Low-Voltage Operation | Guaranteed functionality down to 2.5V - eliminates need for voltage translators in mixed-supply systems |
| Noise-Immune I²C Interface | Schmitt-trigger inputs + 100 ns input filtering - sustains communication in electrically noisy factory-floor environments |
| Partial Page Writes | Allows writing fewer than 16 bytes per page - avoids unnecessary read-modify-write cycles for single-parameter updates |
| Self-Timed Write Cycle | Internal timing eliminates host MCU polling overhead - simplifies firmware by removing wait-loop dependencies |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event timestamps in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with WP-enforced integrity during mains voltage fluctuations. Use Value: 100-year data retention ensures lifetime calibration validity; 2.5V operation supports backup battery-powered logging during outages. |
Use Scenario: Holding I/O mapping tables, PID loop coefficients, and user-defined alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Persistent configuration store accessed via microcontroller I²C during boot and runtime reconfiguration. Use Value: 16-byte page writes reduce configuration update time by >60% vs. byte-wise writes; industrial temp rating matches cabinet ambient. |
| Medical Diagnostic Device Calibration | Automotive Body Control Module |
Use Scenario: Saving sensor offset/gain values and diagnostic fault history in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Secure, low-power EEPROM for FDA-required traceability data with hardware write lock. Use Value: WP pin prevents overwrite during ESD events; 1M endurance supports daily recalibration over 10+ year service life. |
Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in 12V automotive body electronics. IC Role / Device Role / Timing Role: Robust I²C slave for infotainment-linked comfort features with brown-out resilience. Use Value: 2.5V–5.5V range accommodates vehicle battery transients (e.g., load dump, cranking); PDIP package aids manual repairability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95M01-RDW6TP | 1 Mbit SPI interface, 2.5–5.5V, 20 MHz max clock, 5 ms write cycle | Requires SPI peripheral instead of I²C; faster write but higher pin count (6-pin SO8) | Choose when MCU has SPI bandwidth headroom and layout allows extra signal routing |
| BR24G08FJ-WE2 | 8K-bit I²C EEPROM, 1.7–5.5V, 400 kHz @ 5V, 8-pin TSSOP, AEC-Q100 Grade 2 | Automotive-qualified, lower min VCC (1.7V), smaller TSSOP footprint - no PDIP option | Prefer for new automotive designs needing qualification; not drop-in due to package and thermal specs |
Compared with AT24C08A-10PI-2.5, M95M01-RDW6TP trades I²C simplicity for SPI speed and density, while BR24G08FJ-WE2 offers automotive reliability and wider voltage range but requires PCB redesign for TSSOP and qualification validation.
Availability
AT24C08A-10PI-2.5 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical diagnostics, automotive body control, and embedded IoT edge nodes requiring stable component supply across extended temperature and low-voltage operation.
Supply support for AT24C08A-10PI-2.5 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 and maintains full product support, documentation, and manufacturing continuity for the AT24CxxA EEPROM family.
The AT24C08A belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in industrial, automotive, and consumer systems where I²C simplicity and hardware data protection are critical.
FAQ
What is the function of the WP pin on the AT24C08A-10PI-2.5?
The WP (Write Protect) pin on the AT24C08A-10PI-2.5 provides hardware-level write inhibition. When pulled high to VCC, it locks the entire 8K memory array against all write operations - including byte, page, and erase commands - while permitting unrestricted reads. This feature safeguards calibration data and firmware parameters during power transitions or software anomalies. The AT24C08A-10PI-2.5 relies solely on this pin for physical write security, with no internal register-based protection.
Does the AT24C08A-10PI-2.5 support 400 kHz I²C operation at 2.5V?
No, the AT24C08A-10PI-2.5 is specified for 100 kHz maximum I²C clock frequency when operating at 2.5V. Its 400 kHz rating applies only at VCC ≥ 4.5V. Attempting 400 kHz communication at 2.5V violates AC timing specifications - tLOW and tHIGH margins become insufficient, risking SCL synchronization loss and ACK failures. For high-speed low-voltage designs, consider alternative EEPROMs explicitly rated for 400 kHz across the full 2.5V–5.5V range.
How many devices can share the same I²C bus with AT24C08A-10PI-2.5?
Up to two AT24C08A-10PI-2.5 devices can coexist on a single I²C bus. This is because the AT24C08A uses only the A2 pin for hardware device addressing (A0 and A1 are no-connect), yielding two possible 7-bit slave addresses: 0x50 (A2 = low) and 0x51 (A2 = high). Each device must have a unique A2 connection - either grounded or pulled up - and share identical VCC, WP, SCL, and SDA wiring with proper pull-ups.
What package type is used for AT24C08A-10PI-2.5?
The AT24C08A-10PI-2.5 is packaged in an 8-lead PDIP (Plastic Dual Inline Package), designated as 8P3 per Microchip's ordering guide. It measures 0.300" wide with 0.100" lead pitch, intended for through-hole mounting. This package supports manual soldering, socket-based testing, and legacy industrial board layouts - distinct from SOIC, TSSOP, or 14-pin SOIC variants offered in the same family.
Is the AT24C08A-10PI-2.5 compatible with 1.8V I²C systems?
No, the AT24C08A-10PI-2.5 is not rated for 1.8V operation. Its suffix "-2.5" denotes a minimum supply voltage of 2.5V (range: 2.5V–5.5V). While the broader AT24C08A family includes -1.8 variants (e.g., AT24C08A-10PI-1.8), the AT24C08A-10PI-2.5 lacks characterization and guaranteed functionality below 2.5V. Using it with 1.8V VCC risks I²C communication failure, incomplete writes, or undefined reset behavior.
AT24C08A-10PI-2.5 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:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 4.5 µs
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C08A-10PI-2.5 FAQ
1.How can I place an order for AT24C08A-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08A-10PI-2.5 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 AT24C08A-10PI-2.5 reliable?
The price and inventory of AT24C08A-10PI-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08A-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C08A-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08A-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08A-10PI-2.5?
AT24C08A-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08A-10PI-2.5 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 AT24C08A-10PI-2.5?
For technical support, including AT24C08A-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08A-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C08A-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C08A-10PI-2.5 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 AT24C08A-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C08A-10PI-2.5?
All AT24C08A-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08A-10PI-2.5, 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 AT24C08A-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT24C08A-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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