Microchip Technology AT24C08A-10PI-2.7

Overview

AT24C08A-10PI-2.7 from Microchip Technology (formerly Atmel) is an 8K-bit (1024 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.7V–5.5V), and industrial temperature range (−40°C to +85°C). It supports 100 kHz I²C bus speed, 16-byte page writes, and delivers 1 million write cycles with 100-year data retention - used for configuration storage in embedded controllers, power supplies, and sensor calibration modules.

For engineers reviewing the AT24C08A-10PI-2.7 datasheet, AT24C08A-10PI-2.7 pinout, AT24C08A-10PI-2.7 application, or AT24C08A-10PI-2.7 equivalent, key selection considerations include its 2.7V minimum VCC, WP-enabled hardware lock, 8-pin PDIP/SOIC/TSSOP package compatibility, and industrial-grade reliability for long-life field deployments.

Technical Context

The AT24C08A-10PI-2.7 implements a 2-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its device addressing uses only the A2 pin (A0/A1 are NC), enabling up to two devices on a shared bus.

Internally organized as four 256-page blocks of 4 bytes each, it requires a 10-bit word address for random access and supports byte-write and 16-byte page-write modes with self-timed 10 ms max write cycles. Write protection is asserted when WP = VCC, locking the full 8K array.

Key Specifications

Pinout & Package

AT24C08A-10PI-2.7 is supplied in an 8-pin PDIP (8P3) package per JEDEC MS-001 BA, with 0.300" width and through-hole mounting. Pin 1 is marked by a notch or dot; leads are tin-lead plated.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with M95M01-RMN6TP and 24LC08BT-I/P, the AT24C08A-10PI-2.7 uniquely combines industrial temperature qualification, 2.7V minimum operation, 8-pin compatibility, and hardware write protection - making it optimal for ruggedized embedded systems requiring guaranteed long-term data integrity.

Availability

AT24C08A-10PI-2.7 is available at Aetrix Electronics and suitable for smart energy meters, industrial PLC modules, automotive body control units, and medical diagnostic sensors requiring stable component supply across extended product lifecycles.

Supply support for AT24C08A-10PI-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 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 IoT markets.

The AT24C08A-10PI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained and thermally demanding applications.

FAQ

What is the maximum I²C clock frequency supported by the AT24C08A-10PI-2.7?

The AT24C08A-10PI-2.7 supports up to 100 kHz I²C clock frequency when operated at 2.7V–5.5V. This is specified in the AC Characteristics table under fSCL for the 2.7V version. Higher speeds (e.g., 400 kHz) require ≥4.5V VCC and are not valid for the -2.7 suffix variant. The 100 kHz limit ensures timing compliance and noise immunity in low-voltage industrial environments where the AT24C08A-10PI-2.7 is typically deployed.

How does the Write Protect (WP) pin function on the AT24C08A-10PI-2.7?

On the AT24C08A-10PI-2.7, the WP pin enables hardware-level write protection: when pulled high to VCC, it locks the entire 8K memory array against write or erase operations while allowing unlimited reads. When grounded, normal read/write functionality resumes. This behavior is confirmed in the WP Pin Status table and applies exclusively to the AT24C08A variant - unlike earlier AT24C02/04 parts, which protect only half the array.

Which packages are available for the AT24C08A-10PI-2.7?

The AT24C08A-10PI-2.7 is offered in three standard packages: 8-pin PDIP (8P3), 8-pin JEDEC SOIC (8S1), and 8-pin TSSOP (8T). All share identical pinout and electrical specifications. The "PI" suffix denotes industrial temperature grade (−40°C to +85°C), and "-2.7" specifies 2.7V–5.5V operation. The 14-pin SOIC (14S) variant exists for other AT24C08A versions but is not available for the -10PI-2.7 ordering code.

Does the AT24C08A-10PI-2.7 support partial page writes?

Yes, the AT24C08A-10PI-2.7 supports partial page writes within its 16-byte pages. After initiating a page write, the host may transmit fewer than 16 bytes before issuing a STOP condition. The EEPROM increments the internal address counter automatically, and remaining bytes in the page retain their prior values. This capability is explicitly documented in the "Page Write" section and enables efficient updates of scattered configuration fields without overwriting adjacent data in the AT24C08A-10PI-2.7.

What is the endurance and data retention specification for the AT24C08A-10PI-2.7?

The AT24C08A-10PI-2.7 is rated for 1,000,000 write cycles and 100 years of data retention at 25°C. These values are specified in the "High Reliability" section and apply across the full industrial temperature range. Endurance is tested under page-write conditions at 25°C; retention is characterized with accelerated aging and confirmed for archival storage integrity - critical for applications like utility metering and medical device calibration where the AT24C08A-10PI-2.7 serves as primary nonvolatile memory.