Microchip Technology 24LC512-I/PG

Overview

24LC512-I/PG from Microchip Technology Inc. is a 512 Kbit I²C-compatible serial EEPROM organized as 64K × 8-bit memory, operating from 2.5V to 5.5V with industrial temperature range (−40°C to +85°C), 400 µA max read current, 1 µA max standby current, and hardware write-protect via WP pin - used for nonvolatile parameter storage in embedded control systems.

For engineers reviewing the 24LC512-I/PG datasheet, 24LC512-I/PG pinout, 24LC512-I/PG application, or 24LC512-I/PG equivalent, key selection considerations include V_CC voltage compliance (2.5–5.5 V), I²C clock compatibility (up to 400 kHz), 128-byte page write buffer, Schmitt-trigger noise immunity on SDA/SCL, and hardware write-protection behavior at power-up.

Technical Context

The 24LC512-I/PG implements a two-wire I²C interface with open-drain SDA/SCL pins requiring external pull-ups, supports cascaded bus operation via A0–A2 address inputs (up to eight devices), and uses internal address pointer logic for sequential reads across the full 64K address space.

It features self-timed erase/write cycles with 5 ms maximum page write time, 128-byte page latches, and Schmitt-trigger inputs with 0.05 V_CC hysteresis for robust noise suppression - all while maintaining strict I²C timing compliance (T_LOW, T_HIGH, T_SU:DAT) across its rated voltage and temperature range.

Key Specifications

Pinout & Package

24LC512-I/PG is supplied in an 8-lead PDIP (Plastic Dual In-Line Package) with 300-mil body width, through-hole mounting, and standard lead pitch of 0.100 inch. Pin 1 is identified by notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA512-I/P and AT24C512BN-PUM, the 24LC512-I/PG delivers guaranteed 2.5 V minimum operation and dedicated hardware write-protection - critical for industrial systems where supply stability and data integrity are enforced at the silicon level, not firmware.

Availability

24LC512-I/PG is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and smart metering applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for 24LC512-I/PG 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC512 belongs to Microchip's 24XX512 family of I²C serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems across industrial, automotive, and consumer applications.

FAQ

What is the minimum supply voltage required for reliable operation of the 24LC512-I/PG?

The 24LC512-I/PG requires a minimum V_CC of 2.5 V for guaranteed operation across its full industrial temperature range (−40°C to +85°C). It will not function correctly below this threshold, unlike the 24AA512 variant which supports down to 1.7 V. This specification is validated per Microchip DS20001754Q electrical characteristics table.

Does the 24LC512-I/PG support 1 MHz I²C clock frequency?

No, the 24LC512-I/PG supports up to 400 kHz I²C clock frequency at V_CC ≥ 2.5 V. The 1 MHz capability is exclusive to the 24FC512 variant. Attempting 1 MHz operation on the 24LC512-I/PG will violate AC timing parameters including T_HIGH, T_LOW, and T_SU:DAT, resulting in communication failure.

How does the WP pin function on the 24LC512-I/PG during power-up?

The WP pin on the 24LC512-I/PG is sampled at the Stop bit of each write command - not continuously monitored. If WP is tied to V_CC at power-up and remains high, all subsequent write attempts will be ignored (though acknowledged), while reads remain fully operational. No internal latching occurs; behavior is edge-triggered per transaction.

Can the 24LC512-I/PG be used in automotive applications?

Yes - the 24LC512-I/PG is AEC-Q100 qualified for automotive use and rated for industrial temperature range (−40°C to +85°C), making it suitable for body control modules, infotainment configuration storage, and other non-safety-critical automotive subsystems. It meets ESD >4 kV and endurance >1 million cycles per Microchip's qualification report.

What is the maximum number of 24LC512-I/PG devices that can share a single I²C bus?

Up to eight 24LC512-I/PG devices can be cascaded on a single I²C bus using the A0, A1, and A2 address pins. Each combination of logic levels on these three pins generates a unique 3-bit chip address, enabling distinct client addressing within the standard I²C 7-bit address space (1010xxx format).