CAT24C128YI-GT3

CAT24C128YI-GT3 is a 128-kbit I2C serial EEPROM (16 KB) used for non-volatile data storage in embedded systems. It stores configuration data, calibration constants, logs, etc., and retains data without power.
Key points:
- Interface: Two-wire I2C (SCL, SDA); A0–A2 address pins for device selection (up to 8 on one bus).
- Memory: 16,384 bytes; 64-byte page writes; supports random and sequential reads.
- Performance: Standard 100 kHz and Fast 400 kHz I2C operation; typical page-write time ~5 ms.
- Endurance/retention: ~1,000,000 write cycles; data retention on the order of decades.
- Voltage and temp: Vcc ~1.7–5.5 V; industrial-grade variants with extended temperature ranges (check datasheet for exact range, e.g., -40°C to +85°C or higher).
- Package: 8-pin package; GT3 suffix indicates a specific RoHS/compliant packaging option.
Common uses: storing MCU configuration, calibration data, small logs, or other non-volatile data in consumer, automotive, or industrial devices. For exact electrical specs and pinout, consult the CAT24C128YI-GT3 datasheet.

Key features of CAT24C128YI-GT3 (I2C 128‑Kbit EEPROM):
- Capacity/organization: 128 Kbit, 16K × 8 organization
- Interface: I2C two‑wire serial interface, supports standard and fast modes (100/400 kHz)
- Addressing: 16‑bit memory addressing
- Write: 32‑byte page write; random read/write
- Write cycle: typically ~5 ms
- Endurance/retention: ~1,000,000 write cycles; data retention on the order of many years
- Power: wide operating voltage range (typical wide Vcc range)
- Low power: power-down modes and low current in standby
- Write protection: hardware WP input
- Temperature: industrial temperature grade options (e.g., -40°C to +85°C)
- Packaging: 8‑pin packages (e.g., SOIC‑8/TSSOP‑8)
- Applications: storage for microcontrollers, configuration data, logs, and other nonvolatile memory needs
Note: exact voltage, temperature, and package variants may vary by specific part/revision. Please consult the datasheet for exact numbers.

CAT24C128YI-GT3 is in an 8-pin Small Outline Integrated Circuit package (SOIC-8), RoHS-compliant.

- Pin count: 8 pins (8-pin package such as SOIC/SOP).
- Function: 128-kbit I2C serial EEPROM (16 kB) with two‑wire I2C interface; supports random read and page writes; uses A0–A2 for I2C device address and WP for write protection; Vcc and GND pins present (SDA, SCL, etc.).

Manufacturer: Catalyst Semiconductor. Catalyst is an American semiconductor company that designs and markets memory (I2C EEPROMs) and analog/mixed-signal ICs. The company was acquired by ON Semiconductor, so the CAT24C128YI-GT3 is now part of ON Semiconductor’s portfolio.

CAT24C128YI-GT3 is a 128-kbit I2C EEPROM. Common applications include:
- Non-volatile storage for microcontroller config and calibration data
- Lookup tables (sensor compensation, font/graphics data)
- Boot/firmware parameter storage and versioning
- Data logging and event counters
- Memory expansion in consumer, automotive and industrial equipment (appliances, meters, IoT sensors, medical devices)
Compact, persistent storage for embedded systems requiring small, reliable data retention.

CAT24C128YI-GT3 is a 128‑Kbit I2C serial EEPROM. Equivalents include:
- AT24C128A (Atmel/Microchip)
- 24LC128 / 24AA128 (Microchip)
- M24C128-W (STMicroelectronics)
- FM24C128G (Fujitsu)
All are 2‑wire I2C 128Kb EEPROMs. Choose by package, supply voltage (commonly 2.7–5.5V), and temperature range.