Microchip Technology AT24C512-10PU-1.8

Overview

AT24C512-10PU-1.8 from Microchip Technology (formerly Atmel) is a 512 Kbit (65,536 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8 V to 3.6 V, supports up to 100 kHz I²C bus speed at 1.8 V, features hardware write protection via the WP pin, and delivers 100,000 write cycles with 40-year data retention. It is used in industrial sensor calibration storage and power-management configuration memory.

For engineers reviewing the AT24C512-10PU-1.8 datasheet, AT24C512-10PU-1.8 pinout, AT24C512-10PU-1.8 application, or AT24C512-10PU-1.8 equivalent, this page provides verified electrical parameters, package-specific pin mapping (8-lead PDIP), real-world use scenarios, and validated alternative parts for supply continuity and design flexibility.

Technical Context

The AT24C512-10PU-1.8 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting cascaded addressing via A0/A1 pins for up to four devices on one bus. Its internal architecture organizes memory into 512 pages of 128 bytes each, enabling partial-page writes and automatic address roll-over within pages.

It uses Schmitt-trigger inputs and noise-filtered logic for robust operation in electrically noisy environments. The device enters low-power standby mode (<1.0 µA at 1.8 V) after STOP condition receipt or power-up, and supports acknowledge polling to determine write completion without fixed timing delays.

Key Specifications

Pinout & Package

AT24C512-10PU-1.8 is supplied in an 8-lead PDIP (Plastic Dual In-line Package) with 0.300" body width, compatible with through-hole prototyping and legacy industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C512-10PU-1.8, the M24C512-RMN6TP offers identical PDIP compatibility and 1.8 V timing, while the CAT24C512WI-GT3 trades package flexibility for smaller footprint and faster write cycles - making it suitable only when layout revision is feasible.

Availability

AT24C512-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, smart meter configuration memory, and medical device parameter backup requiring stable component supply across extended product lifecycles.

Supply support for AT24C512-10PU-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 support for the AT24Cxx EEPROM family, delivering high-reliability nonvolatile memory solutions for industrial and automotive markets.

The AT24C512-10PU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-voltage, low-power embedded systems requiring robust data retention and I²C interoperability.

FAQ

What is the maximum I²C clock frequency supported by AT24C512-10PU-1.8 at 1.8 V?

The AT24C512-10PU-1.8 supports a maximum I²C clock frequency of 100 kHz when operating at 1.8 V, as specified in Table 4 of the official datasheet. This limit ensures reliable signal integrity and timing margin under low-voltage conditions, and applies regardless of ambient temperature within the industrial range (–40°C to +85°C). Exceeding this frequency may result in ACK failures or data corruption.

Does AT24C512-10PU-1.8 require external pull-up resistors on SDA and SCL lines?

Yes, AT24C512-10PU-1.8 requires external pull-up resistors on both SDA and SCL lines because its I/O structure uses open-drain outputs. For 1.8 V operation, a 10 kΩ pull-up is recommended per the datasheet's AC measurement conditions. Incorrect pull-up values can cause bus contention, slow rise times, or failure to meet tR/tF specifications, directly impacting AT24C512-10PU-1.8 communication reliability.

How does the Write Protect (WP) pin function on AT24C512-10PU-1.8?

On AT24C512-10PU-1.8, the WP pin is active-high: when tied to VCC, all write operations (byte and page) are inhibited, preserving memory contents; when tied to GND, full read/write access is enabled. If left floating, AT24C512-10PU-1.8 internally pulls WP low only if board coupling capacitance to VCC is <3 pF - otherwise, external grounding is required to ensure predictable behavior.

What package type is used for AT24C512-10PU-1.8, and is it RoHS compliant?

AT24C512-10PU-1.8 uses an 8-lead PDIP (Plastic Dual In-line Package) with 0.300" body width, as confirmed by the ordering code suffix "PU" and Package Type table in the datasheet. The "U" designation indicates lead-free and halogen-free construction, fully compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 moisture sensitivity.

Can AT24C512-10PU-1.8 be used alongside other AT24Cxx devices on the same I²C bus?

Yes, AT24C512-10PU-1.8 supports bus cascading with other AT24Cxx EEPROMs using its A0 and A1 address pins. These pins configure the device's 3-bit hardware address, allowing up to four AT24C512-10PU-1.8 units (or mixed AT24C256/AT24C512) on one two-wire bus. Address conflicts are avoided by hardwiring A0/A1 uniquely per device - a key capability confirmed in the Device Addressing section of the AT24C512-10PU-1.8 datasheet.