The " 24LC08BT-I/SN " is an EEPROM ( Electrical ly Erasable Programmable Read-Only Memory ) integrated circuit manufactured by Microchip Technology. This model is part of their 24-series family of memory chips. The "24LC08BT-I/SN" is an 8Kb (kilobit) memory device that uses I2C (Inter-Integrated Circuit) communication protocol.
The following details pertain to the pin functions, the corresponding packaging, and FAQ on the 24LC08BT-I/SN:
Packaging and Pinout Description
The "24LC08BT-I/SN" comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. It has the following pinout configuration:
8-Pin SOIC Package Pin Function Table: Pin Number Pin Name Pin Function Description 1 VSS Ground (0V) 2 WP (Write Protect) Write protection input; when connected to VSS, write operations are disabled. 3 SDA (Serial Data) Serial data input/output; used for data transfer via I2C bus. 4 SCL (Serial Clock ) Serial clock input; used for clocking data transfer in I2C. 5 A2 (Address Pin 2) Address pin used to select chip address, connected to VSS or VDD. 6 A1 (Address Pin 1) Address pin used to select chip address, connected to VSS or VDD. 7 A0 (Address Pin 0) Address pin used to select chip address, connected to VSS or VDD. 8 VCC Positive supply voltage (typically 2.5V to 5.5V)Pinout and Functionality Overview
VSS (Pin 1): This is the ground pin for the chip, and it must be connected to the ground of the system. WP (Write Protect) (Pin 2): This pin controls the write protection for the EEPROM. When the pin is connected to VSS, write operations are enabled. If connected to VDD, the memory is write-protected, meaning no data can be written to it. SDA (Serial Data) (Pin 3): This is the data line used for I2C communication. It allows the device to send and receive data. SCL (Serial Clock) (Pin 4): This is the clock line for I2C communication. The clock synchronizes the data transfer between the master device and the EEPROM. A2, A1, A0 (Address Pins) (Pins 5, 6, 7): These pins are used to set the I2C address of the EEPROM. The address is formed by selecting the logic level of each pin (VSS for 0, VDD for 1). VCC (Pin 8): This pin provides the positive supply voltage for the EEPROM. It usually ranges from 2.5V to 5.5V, depending on the system's requirements.Circuit Principle
The 24LC08BT-I/SN EEPROM operates over the I2C interface . The I2C protocol requires a master device (usually a microcontroller) to communicate with the EEPROM. The master device generates the clock signal (SCL) and initiates data transfer on the SDA line. The address pins (A2, A1, A0) are used to configure the device's I2C address. When data is to be written or read, the master device sends commands followed by the desired memory addresses and data. Write operations are controlled by the WP pin, which can prevent accidental data writes.
20 FAQ (Frequently Asked Questions)
1. What is the 24LC08BT-I/SN memory size? The 24LC08BT-I/SN is an 8Kb EEPROM, which is equivalent to 1024 bytes of memory.
2. What is the supply voltage for the 24LC08BT-I/SN? The typical supply voltage (VCC) for the 24LC08BT-I/SN is between 2.5V and 5.5V.
3. Can I write data to the 24LC08BT-I/SN at any time? No, writing data to the device is controlled by the WP (Write Protect) pin. When the WP pin is connected to VDD, the memory is write-protected.
4. What is the maximum clock speed for the I2C communication? The maximum clock speed for I2C communication is typically 400 kHz in Fast-mode.
5. How can I use the address pins (A0, A1, A2)? The address pins are used to select the I2C address of the chip. These pins can be connected to VSS (logic 0) or VDD (logic 1), allowing you to set the 7-bit I2C address.
6. Is there an EEPROM write cycle time for the 24LC08BT-I/SN? Yes, the typical EEPROM write cycle time is around 5 ms for the 24LC08BT-I/SN.
7. Can I read the memory data even if the WP pin is connected to VDD? Yes, the WP pin only disables write operations. You can still read data from the EEPROM when the WP pin is high (connected to VDD).
8. How do I initiate a write operation to the 24LC08BT-I/SN? To initiate a write operation, the master sends a start condition, followed by the device’s I2C address and the write command, then the data to be written.
9. What is the purpose of the SCL and SDA pins? The SCL pin provides the clock signal for synchronizing data transfer, and the SDA pin carries the data being read or written.
10. Can I use the 24LC08BT-I/SN with a 3.3V microcontroller? Yes, the 24LC08BT-I/SN can operate with a supply voltage of 3.3V, making it compatible with most 3.3V logic systems.
11. What happens if the SCL clock is stopped during communication? If the SCL clock is stopped during communication, data transfer will be paused. The device will remain in its current state until the clock resumes.
12. How do I prevent data corruption in the 24LC08BT-I/SN? To prevent data corruption, always ensure the WP pin is properly configured and avoid power loss during write operations.
13. How do I perform a read operation on the 24LC08BT-I/SN? To perform a read operation, the master device sends a start condition, followed by the device’s I2C address and a read command, then the data is transmitted over the SDA line.
14. Is the 24LC08BT-I/SN hot-swappable? The 24LC08BT-I/SN is not designed for hot-swapping. Proper care should be taken when connecting or disconnecting the device from the system.
15. Can I use multiple 24LC08BT-I/SN chips on the same I2C bus? Yes, multiple 24LC08BT-I/SN chips can be used on the same I2C bus, provided each chip has a unique I2C address.
16. Does the 24LC08BT-I/SN require special software to communicate? No, standard I2C communication software is sufficient to interact with the 24LC08BT-I/SN.
17. How do I reset the 24LC08BT-I/SN? The 24LC08BT-I/SN does not have a reset pin. It can be reset by toggling the power supply or via software through the I2C interface.
18. What is the expected data retention for the 24LC08BT-I/SN? The data retention time for the 24LC08BT-I/SN is typically 40 years.
19. What is the write endurance of the 24LC08BT-I/SN? The write endurance of the 24LC08BT-I/SN is typically 1 million write cycles per memory location.
20. Can I use the 24LC08BT-I/SN in high-temperature environments? The 24LC08BT-I/SN is rated for operation in the temperature range of -40°C to +85°C, which is suitable for most standard applications.
This detailed explanation covers the pin functions and the FAQ for the 24LC08BT-I/SN EEPROM device. Let me know if you need more information!