24LC128-I-SN Detailed explanation of pin function specifications and circuit principle instructions

The " 24LC128-I/SN " is a product manufactured by Microchip Technology Inc. It is a 128 Kbit (16 K x 8) I2C-compatible EEPROM. The "I/SN" suffix indicates a specific packaging type and operating temperature. It is housed in an 8-pin small-outline integrated circuit (SOIC) package.

Here is a detailed explanation of the pin functions, specifications, circuit principles, and pin descriptions for the 24LC128-I/SN. I will also provide a table format for the pin functions and a set of frequently asked questions (FAQ).

Pin Function Specifications and Circuit Principle Instructions:

Packaging:

The 24LC128-I/SN is packaged in an 8-pin SOIC (Small Outline Integrated Circuit). The SOIC-8 package is widely used due to its small footprint and ease of mounting on printed circuit boards (PCBs).

Pin Functions Table:

Here is a detailed list of all the pins, including their pin numbers, functions, and brief explanations.

Pin Number Pin Name Function Description 1 Vss Ground (0V) for the EEPROM device. It is the reference point for all voltages. 2 WP Write Protect. When tied to Vss, the memory is write-enabled. When tied to Vcc, writing is disabled. 3 SDA Serial Data. This is the data line for the I2C protocol used for communication. 4 SCL Serial Clock . This line is for the clock signal to synchronize data transfer on the I2C bus. 5 A2 Address Bit 2. Part of the device address. Can be left unconnected for a 7-bit address. 6 A1 Address Bit 1. Part of the device address. Can be left unconnected for a 7-bit address. 7 A0 Address Bit 0. Part of the device address. Can be left unconnected for a 7-bit address. 8 Vcc Power Supply (typically 2.5V to 5.5V). This pin supplies the voltage to operate the EEPROM. Pin Details: Vss (Ground): This is the reference ground for the device, and it must be connected to the system ground for proper operation. Vcc (Power Supply): This pin must be connected to the appropriate positive supply voltage. It supports a wide range from 2.5V to 5.5V. SDA (Serial Data): This is the data line for the I2C interface . Data is sent and received over this line in sync with the clock signal. SCL (Serial Clock): The clock signal on this pin is used to synchronize the data transfer between the EEPROM and the microcontroller. WP (Write Protect): If this pin is tied to Vcc, write operations to the EEPROM are disabled. Tying it to Vss enables writing. A0, A1, A2 (Address Pins): These pins are used to select the device's address on the I2C bus. These are part of the device’s unique address.

FAQs (Frequently Asked Questions)

Q: What is the operating voltage range for the 24LC128-I/SN? A: The operating voltage range for the 24LC128-I/SN is 2.5V to 5.5V. Q: How does the Write Protect (WP) pin function? A: The WP pin controls write access to the memory. Tying it to Vcc disables writes, while tying it to Vss enables writes. Q: Can I use the 24LC128-I/SN in 5V systems? A: Yes, the 24LC128-I/SN can operate with 5V systems as it supports a voltage range from 2.5V to 5.5V. Q: What is the I2C address of the 24LC128-I/SN? A: The I2C address is determined by the A0, A1, and A2 pins. By default, the address is 0x50, but these pins can modify the address. Q: What is the maximum clock frequency for the I2C communication? A: The maximum clock frequency for I2C communication with the 24LC128-I/SN is 400 kHz (Fast Mode). Q: How do I interface the 24LC128-I/SN with a microcontroller? A: You can interface the 24LC128-I/SN with a microcontroller using the I2C protocol. Connect the SDA and SCL lines to the microcontroller, along with power (Vcc) and ground (Vss). Q: Can I use multiple 24LC128-I/SN devices on the same I2C bus? A: Yes, you can use multiple 24LC128-I/SN devices on the same I2C bus by selecting different device addresses using the A0, A1, and A2 pins. Q: What is the memory size of the 24LC128-I/SN? A: The 24LC128-I/SN provides 128 Kbits of memory, organized as 16 Kbytes (8-bit data width). Q: How many data bytes can the 24LC128-I/SN hold? A: The 24LC128-I/SN can hold 16 Kbytes (128 Kbits) of data.

Q: What are the typical applications of the 24LC128-I/SN?

A: The 24LC128-I/SN is typically used in data logging, calibration, and storage applications in embedded systems.

Q: Can I use the 24LC128-I/SN for storing configuration data?

A: Yes, the 24LC128-I/SN is often used for storing configuration data in embedded systems.

Q: How do I read data from the 24LC128-I/SN?

A: Data can be read from the 24LC128-I/SN via the I2C interface using the appropriate read commands according to the I2C protocol.

Q: How do I write data to the 24LC128-I/SN?

A: Data is written to the 24LC128-I/SN using the I2C interface. The write command is sent along with the address and data byte.

Q: What is the maximum write cycle time for the 24LC128-I/SN?

A: The maximum write cycle time for the 24LC128-I/SN is 5 ms at 25°C.

Q: Does the 24LC128-I/SN support page writes?

A: Yes, the 24LC128-I/SN supports page writes. The page size is 32 bytes.

Q: What happens if the write protect pin is tied to Vcc?

A: If the WP pin is tied to Vcc, the memory is write-protected, and no data can be written to the device.

Q: What happens if the write protect pin is tied to Vss?

A: If the WP pin is tied to Vss, the memory is write-enabled, and you can write data to the device.

Q: Can the 24LC128-I/SN be used in automotive applications?

A: Yes, the 24LC128-I/SN can be used in automotive applications, but you should ensure that it operates within the specified temperature range.

Q: What is the maximum number of write cycles the 24LC128-I/SN supports?

A: The 24LC128-I/SN supports a minimum of 1 million write cycles.

Q: Does the 24LC128-I/SN have a built-in EEPROM protection mechanism?

A: Yes, the 24LC128-I/SN has an internal write protection mechanism controlled by the WP pin.

Total Pin Function Details:

This document includes a detailed and complete explanation of the 24LC128-I/SN's pins, their functions, and the common FAQs to provide a complete understanding of how this EEPROM device works. The table format is intended to make it easy to navigate each pin's function, and the FAQs section covers common troubleshooting and implementation issues.

This format ensures all the relevant data is captured concisely but in a clear and comprehensive manner.