The component "CAT24C256WI-GT3" is a 256K-bit (32K x 8) I2C EEPROM from ON Semiconductor. It is designed to store data in non-volatile memory, and uses the I2C communication protocol for data transfer.
Package Type
The CAT24C256WI-GT3 comes in a SOIC-8 (Small Outline Integrated Circuit) package. It has 8 pins in total.
Pin Function Specifications for CAT24C256WI-GT3 in SOIC-8 Package:
Pin Number Pin Name Function Description 1 A0 Address Pin 0: Used for selecting a device address in I2C mode (for multiple devices on the same bus). 2 A1 Address Pin 1: Used for selecting a device address in I2C mode. 3 A2 Address Pin 2: Used for selecting a device address in I2C mode. 4 GND Ground: Connect to ground in the circuit. 5 SDA Serial Data (I2C): Data line for I2C communication. Bidirectional data line for reading and writing. 6 SCL Serial Clock (I2C): Clock line for I2C communication. Used to synchronize data transfer. 7 WP Write Protect: If low, it enables writing to the EEPROM; if high, writing is disabled (write protection). 8 Vcc Power Supply: Connect to a positive voltage source (typically +3.3V or +5V).Function of Each Pin:
A0, A1, A2 (Pins 1-3): These pins are used to configure the device address. They can be connected to logic high (1) or low (0) depending on the system requirements. These pins are necessary when multiple CAT24C256WI-GT3 devices are connected on the same I2C bus.
GND (Pin 4): Ground pin that must be connected to the ground of the system.
SDA (Pin 5): The serial data pin for I2C communication. This pin is used for data transfer between the EEPROM and the microcontroller/processor. It is bidirectional, meaning it can both receive and transmit data.
SCL (Pin 6): The serial clock pin for I2C communication. It controls the timing of data transfer, ensuring that both the master and slave devices are synchronized.
WP (Pin 7): The write protection pin. When it is connected to a logic high (typically Vcc), it prevents any write operation to the memory. When it is low, write operations are allowed.
Vcc (Pin 8): The power supply pin that provides the necessary voltage for the EEPROM. This can be connected to either a 3.3V or 5V source depending on the system voltage.
20 FAQ for CAT24C256WI-GT3:
Q: What is the function of pin A0, A1, and A2 on the CAT24C256WI-GT3? A: A0, A1, and A2 are address pins used to select the device address in I2C communication.
Q: How do I configure multiple CAT24C256WI-GT3 devices on the same I2C bus? A: Use different combinations of A0, A1, and A2 pins to configure unique addresses for each device.
Q: What voltage should be applied to Vcc (Pin 8) for the CAT24C256WI-GT3? A: Vcc should be connected to either a +3.3V or +5V power supply.
Q: What is the function of the WP (Pin 7) on the CAT24C256WI-GT3? A: WP is the write protection pin. If set to high, write operations are disabled, and if set to low, writes are allowed.
Q: How do I perform a write operation on the CAT24C256WI-GT3? A: To write data, ensure WP is low, and use I2C protocol to send the data to the memory address.
Q: What is the communication protocol used by the CAT24C256WI-GT3? A: The CAT24C256WI-GT3 uses the I2C communication protocol.
Q: Can the CAT24C256WI-GT3 be used in low-power applications? A: Yes, it is suitable for low-power applications since it only consumes power during data access.
Q: What is the maximum clock speed for I2C communication with the CAT24C256WI-GT3? A: The CAT24C256WI-GT3 supports I2C clock speeds up to 400 kHz in fast mode.
Q: How do I read data from the CAT24C256WI-GT3? A: To read data, initiate a read command using I2C protocol, then clock out the data from the EEPROM.
Q: Is the CAT24C256WI-GT3 compatible with both 3.3V and 5V systems? A: Yes, it is compatible with both 3.3V and 5V power systems, but the Vcc pin must be connected to the corresponding voltage.
Q: Can I use CAT24C256WI-GT3 for long-term data storage? A: Yes, the CAT24C256WI-GT3 is non-volatile, meaning it retains data even when power is removed.
Q: What is the storage capacity of the CAT24C256WI-GT3? A: The storage capacity of the CAT24C256WI-GT3 is 256K bits, equivalent to 32,768 bytes.
Q: What is the maximum number of write cycles for CAT24C256WI-GT3? A: The CAT24C256WI-GT3 can endure up to 1 million write cycles per byte.
Q: Can I modify the address of the CAT24C256WI-GT3 during operation? A: No, the device address is set at power-up based on the A0, A1, and A2 pins.
Q: Is the CAT24C256WI-GT3 suitable for industrial applications? A: Yes, the CAT24C256WI-GT3 is suitable for industrial applications, especially where data storage and retention are required.
Q: Can I use the CAT24C256WI-GT3 in high-speed applications? A: It supports up to 400 kHz I2C speed, which is sufficient for many applications, though not suitable for extremely high-speed systems.
Q: What is the typical current consumption of the CAT24C256WI-GT3? A: The typical current consumption is very low, typically around 1 µA in the standby mode.
Q: What happens if I connect the WP pin to a logic high? A: If WP is connected to a logic high, the write protection is enabled, preventing any write operations to the memory.
Q: How do I reset the CAT24C256WI-GT3 if it becomes unresponsive? A: To reset, power down the device and then power it back on.
Q: Can the CAT24C256WI-GT3 be used for temporary data storage? A: Yes, it is suitable for temporary storage of data as well as long-term non-volatile memory.
This covers the CAT24C256WI-GT3's pin functions and frequently asked questions in detail. Let me know if you need further clarification!
