Microchip Technology AT24C512-10PI-1.8

Overview

AT24C512-10PI-1.8 from Microchip Technology (formerly Atmel) is a 512 Kbit (65,536 × 8) serial EEPROM with I²C-compatible 2-wire interface, optimized for low-voltage operation at V_CC = 1.8V to 3.6V, supporting up to 100 kHz clock frequency, 128-byte page write mode, and hardware write protection via WP pin - used in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the AT24C512-10PI-1.8 datasheet, AT24C512-10PI-1.8 pinout, AT24C512-10PI-1.8 application, or AT24C512-10PI-1.8 equivalent, key selection criteria include 1.8V supply compatibility, industrial temperature range (–40°C to +85°C), 100,000 write endurance, 40-year data retention, and 8-pin PDIP package with verified A0/A1 address inputs and SDA/SCL timing compliance.

Technical Context

The AT24C512-10PI-1.8 implements a true I²C-compatible 2-wire bus interface with Schmitt-triggered, noise-filtered inputs and open-drain SDA output. It uses a 16-bit internal word address counter and supports cascading up to four devices on one bus via hardwired A0/A1 pins.

Its memory is organized into 512 pages of 128 bytes each, enabling partial page writes and automatic address roll-over within page boundaries. Write operations are self-timed with typical 5 ms duration and support acknowledge polling for host synchronization.

Key Specifications

Pinout & Package

AT24C512-10PI-1.8 is supplied in an 8-pin Plastic Dual In-line Package (PDIP), 0.300" wide, with through-hole mounting and industry-standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C512-10PI-1.8, M95512-WMN6TP requires SPI interface redesign and adds software write-protection complexity, while BR24G512FJ-WE2 offers faster timing and smaller size but demands requalification of thermal and mechanical design due to DFN packaging.

Availability

AT24C512-10PI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart metering, and PLC I/O module applications requiring stable component supply, long-lifecycle assurance, and guaranteed industrial-grade qualification.

Supply support for AT24C512-10PI-1.8 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 AT24Cxx EEPROM family.

The AT24C512-10PI-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-voltage nonvolatile storage in industrial, automotive, and medical systems where data integrity and long-term retention are critical.

FAQ

What is the maximum I²C clock frequency supported by AT24C512-10PI-1.8?

The AT24C512-10PI-1.8 supports a maximum clock frequency of 100 kHz when operated at V_CC = 1.8V. This is specified in the AC Characteristics table under f_SCL for the 1.8-volt column. The device also supports 400 kHz at 2.7V and 1 MHz at 5.0V, but those speeds are not valid for the -1.8 suffix variant. Always observe t_LOW ≥ 4.7 µs and t_HIGH ≥ 4.0 µs timing constraints at 1.8V.

Does AT24C512-10PI-1.8 support hardware write protection?

Yes, AT24C512-10PI-1.8 includes a dedicated Write Protect (WP) pin that provides hardware-level write inhibition. When WP is tied to V_CC, all write operations - including byte, page, and erase - are disabled. If WP is tied to GND or left floating (internally pulled down), normal write functionality is enabled. This feature is confirmed in the Pin Description and Features sections of the datasheet.

What package type is used for AT24C512-10PI-1.8?

AT24C512-10PI-1.8 is packaged in an 8-pin Plastic Dual In-line Package (PDIP), designated as 8P3 in Microchip's ordering information. Its dimensions are 0.300" wide with standard through-hole lead spacing. This package is explicitly listed in the Ordering Information table for the -10PI-1.8 variant and shown in the Pin Configurations diagram labeled "8-pin PDIP".

Can multiple AT24C512-10PI-1.8 devices share the same I²C bus?

Yes, up to four AT24C512-10PI-1.8 devices can be connected to a single I²C bus using the A0 and A1 address input pins. These pins configure the two least-significant bits of the 7-bit I²C slave address, allowing unique addressing. The datasheet confirms this capability in the Device Addressing section and states that floating A0/A1 pins default to logic low, enabling straightforward hardware configuration.

What is the write endurance and data retention specification for AT24C512-10PI-1.8?

AT24C512-10PI-1.8 guarantees 100,000 write cycles and 40 years of data retention at +85°C. These values are explicitly stated in the Features section and confirmed in the DC Characteristics table under Endurance and Data Retention notes. The 40-year retention is measured under accelerated testing conditions and applies across the full industrial temperature range (–40°C to +85°C).