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Microchip Technology AT24C08A-10PI
- Part No.:
- AT24C08A-10PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C08A-10PI.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT24C08A-10PI from Microchip Technology (formerly Atmel) is an 8-Kbit (1024 × 8) I²C-compatible serial EEPROM with industrial temperature range (−40°C to +85°C), 2.7V–5.5V supply operation, and hardware write protection via the WP pin. It supports 400 kHz I²C communication at 5V and 100 kHz down to 1.8V, features 16-byte page writes, and delivers 1 million write cycles with 100-year data retention - used in embedded system configuration storage, sensor calibration data logging, and power meter firmware parameter backup.
For engineers reviewing the AT24C08A-10PI datasheet, AT24C08A-10PI pinout, AT24C08A-10PI application, or AT24C08A-10PI equivalent, key selection considerations include its 8-pin PDIP package (8P3), A2-only device addressing (A0/A1 = NC), 10 ms max self-timed write cycle, Schmitt-triggered noise-immune inputs, and compatibility with microcontroller I²C peripherals requiring robust nonvolatile memory for field-updatable settings.
Technical Context
The AT24C08A-10PI implements a two-wire I²C interface with open-drain SDA and input-clocked SCL, supporting standard-mode (100 kHz) and fast-mode (400 kHz) timing per JEDEC specifications. Its internal architecture divides the 8K-bit array into four 256-page blocks of 4 bytes each, requiring a 10-bit word address for random access.
Write protection is enforced exclusively through the WP pin: tied to VCC, it locks the full 8K array; tied to GND, full read/write access is enabled. Addressing uses only the A2 pin (A0 and A1 are no-connect), enabling up to two AT24C08A devices on a single I²C bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8 bits), organized as 4 blocks × 256 pages × 4 bytes - enables efficient page-aligned firmware parameter storage. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level shifting. |
| I²C Clock Frequency | Up to 400 kHz at 5V; 100 kHz at 2.7V - ensures deterministic timing margins in noise-prone industrial environments. |
| Write Cycle Time | Max 10 ms self-timed - eliminates need for external polling delay; ACK polling supported for synchronous host control. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validated for long-life deployment in utility meters and industrial controllers. |
| ESD Protection | >3000V HBM - provides robust handling during board assembly and field service without additional protection circuitry. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade applications including motor drives and HVAC controls. |
Pinout & Package
AT24C08A-10PI is supplied in an 8-lead, 0.300" wide plastic dual in-line package (PDIP, package code 8P3), compliant with JEDEC MS-001 BA. Pin 1 is marked by a notch or dot; leads are spaced 0.100" (2.54 mm) apart with 0.300" body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | No connect (NC) for AT24C08A - unused; must be left floating or tied to GND/VCC without functional effect. |
| A1 | Device Address Input | No connect (NC) for AT24C08A - unused; no impact on addressing or operation. |
| A2 | Device Address Input | Hardwired address bit - determines one of two possible I²C device addresses (0x50 or 0x51) on shared bus. |
| GND | Ground Reference | Return path for VCC and all logic signals; requires low-impedance connection to system ground plane. |
| VCC | Power Supply | 2.7V–5.5V main supply - decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin. |
| WP | Write Protect Control | Active-high hardware lock - when pulled high to VCC, disables all write operations across entire 8K array. |
| SCL | Serial Clock Input | Positive-edge clock for I²C transactions; requires external pull-up resistor (typically 2.2–10 kΩ). |
| SDA | Serial Data I/O | Bidirectional open-drain data line - shared across multiple I²C devices; requires same pull-up as SCL. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin enables full-array lock without firmware intervention - critical for preventing accidental overwrites in safety-critical systems. |
| Low-Voltage Operation | Functional down to 2.7V with 100 kHz I²C - supports brown-out resilience in battery-backed or energy-harvesting designs. |
| Noise-Immune Inputs | Schmitt-triggered SCL/SDA with 100 ns noise suppression - eliminates false triggering in electrically noisy factory-floor environments. |
| Page Write Capability | 16-byte page writes reduce I²C transaction overhead - cuts write time by ~50% vs. byte-by-byte for contiguous configuration data. |
| Industrial Temperature Rating | −40°C to +85°C operation - validated across thermal cycling and extended burn-in for automotive under-hood and industrial PLC use. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed via MCU I²C during boot and runtime updates; WP pin hardwired to prevent field corruption. Use Value: Guarantees 100-year retention of metrology-critical values and withstands 1M+ field updates over 20+ year product lifetime. |
Use Scenario: Holding I/O mapping tables, PID tuning parameters, and firmware update staging buffers in programmable logic controllers. IC Role / Device Role / Timing Role: Dedicated configuration EEPROM isolated from main flash; accessed during cold start and maintenance mode via isolated I²C bus. Use Value: Enables zero-downtime parameter reconfiguration without MCU firmware reload; WP pin prevents unintended writes during EMI events. |
| Medical Diagnostic Sensor Calibration | Automotive Body Control Module (BCM) |
Use Scenario: Recording per-sensor gain/offset coefficients and date-stamped calibration history in portable ultrasound transducers. IC Role / Device Role / Timing Role: Calibration data vault - written once during factory calibration, read at every power-on; A2 pin used to uniquely identify sensor unit. Use Value: Eliminates need for external calibration EEPROM programming fixtures; 100-year retention meets FDA 510(k) archival requirements. |
Use Scenario: Storing seat position presets, mirror angle memories, and lighting profiles in vehicle body control units. IC Role / Device Role / Timing Role: User preference storage - updated via CAN-to-I²C gateway; WP pin controlled by BCM firmware to block writes during ignition transitions. Use Value: Survives 15+ year vehicle lifecycle with repeated power cycling; 2.7V operation ensures reliable writes during cranking voltage dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95M08-RDW6TP | 8-Mbit SPI interface, 5V-only (4.5–5.5V), 20 MHz max clock, no WP pin - requires SPI peripheral instead of I²C. | Used where higher density and faster write throughput are needed, but I²C bus is unavailable or congested. | Select only if host MCU lacks I²C or requires >8Kbit capacity; PCB redesign needed for SPI routing and pinout. |
| 24LC08BT-I/P | Same 8Kbit I²C EEPROM, 2.5–5.5V, but in 8-pin PDIP with -I/P (industrial temp) marking and 100 kHz max speed - no 400 kHz support. | Drop-in replacement for cost-sensitive industrial designs where 400 kHz timing is unnecessary. | Valid alternative if 400 kHz operation is unused; verify WP functionality and endurance spec match against AT24C08A-10PI. |
Compared with M95M08-RDW6TP and 24LC08BT-I/P, the AT24C08A-10PI uniquely combines I²C compatibility, 400 kHz capability at 5V, industrial temperature rating, and dedicated hardware write protection in an 8P3 PDIP package - making it optimal for space-constrained, noise-immune, and field-upgradeable embedded systems.
Availability
AT24C08A-10PI is available at Aetrix Electronics and suitable for smart metering, industrial PLC configuration, medical sensor calibration, and automotive BCM applications requiring stable component supply across multi-year production cycles.
Supply support for AT24C08A-10PI 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 technical and manufacturing continuity for the AT24CxxA EEPROM family. The company specializes in microcontrollers, analog, and memory solutions for industrial, automotive, and consumer markets.
The AT24C08A-10PI belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in resource-constrained embedded systems where firmware simplicity and long-term data integrity are paramount.
FAQ
What is the maximum I²C clock frequency supported by the AT24C08A-10PI?
The AT24C08A-10PI supports up to 400 kHz I²C clock frequency when operated at VCC = 4.5V–5.5V. At lower supply voltages (2.7V–5.5V), the maximum guaranteed clock rate is 100 kHz. This dual-speed capability allows designers to optimize for speed in 5V systems or robustness in low-voltage battery-powered applications - both fully supported by the AT24C08A-10PI's AC timing specifications.
How does the Write Protect (WP) pin function on the AT24C08A-10PI?
On the AT24C08A-10PI, the WP pin provides hardware-level write inhibition: when pulled high to VCC, it locks the entire 8K-bit memory array against all write operations (byte, page, or erase); when tied to GND, full read/write access is enabled. Unlike earlier AT24Cxx variants, the AT24C08A-10PI applies protection uniformly across the full array - a critical safeguard for mission-critical parameter storage in the AT24C08A-10PI.
Which pins are unused (no-connect) on the AT24C08A-10PI and why?
The AT24C08A-10PI leaves A0 and A1 as no-connect (NC) pins because its device addressing uses only the A2 pin - enabling exactly two unique I²C addresses (0x50 and 0x51) on a shared bus. This simplifies layout and eliminates address conflicts in multi-device systems. These pins must remain unconnected or tied to GND/VCC with no electrical impact - a design distinction confirmed in the AT24C08A-10PI pin description and device addressing section.
What is the memory organization and addressing scheme of the AT24C08A-10PI?
The AT24C08A-10PI organizes its 8 Kbit as 1024 words × 8 bits, internally segmented into four 256-page blocks of 4 bytes each. Random access requires a 10-bit word address, with the upper 2 bits selecting the block and lower 8 bits indexing within the block. This structure enables efficient page-aligned writes of up to 16 bytes - a core architectural feature of the AT24C08A-10PI that reduces I²C transaction count during bulk configuration updates.
Is the AT24C08A-10PI compatible with 1.8V I²C systems?
No - the AT24C08A-10PI is rated for 2.7V–5.5V operation only. While the broader AT24C08A family includes -1.8 suffix variants (e.g., AT24C08A-10PI-1.8), the AT24C08A-10PI itself is specified for minimum 2.7V supply and does not guarantee functionality or timing compliance below that threshold. For true 1.8V I²C systems, the AT24C08A-10PI-1.8 variant must be selected instead.
AT24C08A-10PI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C08A-10PI FAQ
1.How can I place an order for AT24C08A-10PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08A-10PI 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 reliable?
The price and inventory of AT24C08A-10PI 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 is usually 5 days.
3.What payment methods are accepted for AT24C08A-10PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08A-10PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08A-10PI?
AT24C08A-10PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08A-10PI 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?
For technical support, including AT24C08A-10PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08A-10PI requirements.
6.How does Aetrix verify that AT24C08A-10PI is sourced from the original manufacturer or authorized distributors?
All AT24C08A-10PI 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 meets industry standards.
7.What is the process for return or replacement of AT24C08A-10PI?
All AT24C08A-10PI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08A-10PI, 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 part is unused and in its original packaging.
Return procedure for AT24C08A-10PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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