24LC512-I/ST

The 24LC512-I/ST is a 64 KB (512 Kbit) serial EEPROM with I2C two‑wire interface. It provides nonvolatile storage for small data such as configuration, logs, or buffers, retaining data when power is removed.
Key points
- Interface: I2C (two-wire); supports standard and fast modes; uses 16-bit word addressing for the 64 KB memory.
- Organization: 64K × 8; uses A0–A2 pins for device addressing on the bus and a WP pin for write protection.
- Features: random access reads/writes, page write capability, sequential read after addressing; low-power standby.
- Endurance/Retention: typically ~1,000,000 write cycles; data retention on the order of decades.
- Power and temp: operates from ~2.7–5.5 V (industrial variant typically -40°C to +85°C); -I/ST suffix indicates industrial temperature range (and RoHS-compliant variant, depending on vendor).
- Applications: storing calibration data, configuration settings, logs, or any nonvolatile data for embedded systems.
Note: exact voltage range, page size, and package options may vary by vendor; consult the specific datasheet for the I/ST variant you use.

Equivalent 512Kbit I2C EEPROMs to 24LC512-I/ST:
- AT24C512 (Atmel/Microchip)
- M24C512 (STMicroelectronics)
- CAT24C512 (ON Semiconductor)
- FM24C512 (Fudan Microelectronics)
All are 8-pin I2C serial EEPROMs with similar timing and addressing. Check voltage (often 5V) and industrial-temp variants (-I) to match your -I/ST part.

Concise features of 24LC512-I/ST:
- 512 kbit (64 kB) I2C serial EEPROM
- 16‑bit addressing (two‑byte word address) for full 0x0000–0xFFFF memory space
- Page write capability: 128-byte pages; supports rapid sequential writes
- Random read and sequential read operations
- I2C two‑wire interface: standard (100 kHz) and fast-mode (400 kHz) typically supported
- A0–A2 address pins to select device address; WP pin for hardware write protection
- Endurance: ~1,000,000 write cycles; Data retention typically ~40 years
- Operating voltage: 2.5–5.5 V
- Temperature grade: Industrial (-40°C to +85°C) for the I/ST variant
- Packages: 8‑pin options (PDIP, SOIC, etc.)
- Applications: external memory for microcontrollers, data logging, configuration storage, etc.
Note: exact specs (e.g., exact I2C speed and current) can vary by package/rev; consult the specific datasheet for the exact variant.

Pin count: 8 pins (DIP8/SO8).
Function: ST 24LC512-I/ST is a 512‑kbit I2C (2‑wire) serial EEPROM. It provides non-volatile storage of 64K bytes, accessed via SDA/SCL. It includes address pins A0–A2 for device addressing, a WP pin for write protection, and power pins Vcc and GND. Memory addressing uses a 16‑bit address.

Manufacturer: Microchip Technology Inc. It is an American multinational semiconductor company that designs and manufactures microcontrollers, memory (including I2C EEPROMs like the 24LC512), and analog/ interface products for embedded systems.

24LC512-I/ST is a 64K×8 I2C serial EEPROM. Applications include:
- Non-volatile configuration storage for microcontrollers: boot flags, calibration constants, device IDs, serial numbers
- Data logging and buffering: sensor data, event counters, logs across power cycles
- I2C memory expansion for embedded systems needing persistent storage without battery
- Automotive/industrial instrumentation for fault logs and parameter data in rugged, low-power environments
- Consumer electronics for storing user preferences and setup data
These use cases exploit its persistent storage, low power, and simple I2C interface.

8-pin package: DIP-8 or SOIC-8 (standard 8-pin serial EEPROM package).