The AT24C08C-SSHM-T is an EEPROM ( Electrical ly Erasable Programmable Read-Only Memory ) chip manufactured by Microchip Technology. It typically comes in the SOIC-8 (Small Outline Integrated Circuit) package. Below is a detailed explanation of the pin functions and circuit principles, including an overview of the pinout, the specifications, and the relevant FAQs.
Package: SOIC-8
The AT24C08C-SSHM-T has 8 pins in total, with the following detailed pinout:
Pin Number Pin Name Pin Function Description 1 A0 Address bit 0, used for selecting one of the multiple devices in a system. 2 A1 Address bit 1, used in conjunction with A0 to form the device address. 3 A2 Address bit 2, further used with A0 and A1 to address the device. 4 GND Ground, connects to the system ground. 5 SDA Serial Data, data input/output pin for I2C communication. 6 SCL Serial Clock , clock input for I2C communication. 7 WP Write Protect, if tied to ground allows write access; otherwise, write is protected. 8 VCC Power supply pin, connects to the positive power rail (typically +5V).Circuit Principles:
The AT24C08C-SSHM-T uses the I2C communication protocol for data transfer between the EEPROM and a microcontroller. The EEPROM stores 8Kb of data (1K x 8) and allows random access to the stored data.
I2C Protocol: The AT24C08C-SSHM-T operates over the I2C protocol, which uses two wires: SDA (Serial Data) for data transmission and SCL (Serial Clock) for synchronization of data flow.
Device Addressing: The device has three address pins (A0, A1, A2), which are used to configure the address of the EEPROM on the I2C bus. This allows multiple devices to be used in the same system.
Write Protection (WP Pin): The WP pin can be used to prevent accidental writes to the memory. When connected to ground, writing to the EEPROM is allowed. If connected to VCC, the write functionality is disabled.
Frequently Asked Questions (FAQs)
Q: What is the memory capacity of the AT24C08C-SSHM-T? A: The AT24C08C-SSHM-T has a memory size of 8Kb, or 1024 bytes.
Q: What is the communication protocol for the AT24C08C-SSHM-T? A: The AT24C08C-SSHM-T uses the I2C protocol for communication.
Q: How many address pins does the AT24C08C-SSHM-T have? A: The AT24C08C-SSHM-T has 3 address pins (A0, A1, A2) for configuring the device address.
Q: How many pins does the AT24C08C-SSHM-T have in its package? A: The AT24C08C-SSHM-T comes in an 8-pin SOIC package.
Q: What is the function of the WP pin? A: The WP pin is used for write protection. If connected to ground, writing to the memory is allowed. If connected to VCC, write protection is enabled.
Q: What is the voltage range for the AT24C08C-SSHM-T? A: The AT24C08C-SSHM-T operates within a voltage range of 1.8V to 5.5V.
Q: Can multiple AT24C08C-SSHM-T devices be connected on the same I2C bus? A: Yes, multiple AT24C08C-SSHM-T devices can be connected to the same I2C bus by using different combinations of the address pins (A0, A1, A2).
Q: What is the maximum clock speed for I2C communication? A: The maximum clock speed for I2C communication with the AT24C08C-SSHM-T is 400 kHz (Fast Mode).
Q: How is data read from the AT24C08C-SSHM-T? A: Data is read from the AT24C08C-SSHM-T using the I2C protocol by sending a read command along with the memory address.
Q: What is the size of each memory page on the AT24C08C-SSHM-T? A: The AT24C08C-SSHM-T has 32-byte memory pages for data storage.
Q: How can I write data to the AT24C08C-SSHM-T? A: Data can be written to the AT24C08C-SSHM-T using the I2C protocol by sending a write command along with the memory address and data.
Q: What happens if I exceed the maximum page size when writing to the EEPROM? A: If the maximum page size (32 bytes) is exceeded, the AT24C08C-SSHM-T will automatically wrap around to the next memory page.
Q: Does the AT24C08C-SSHM-T support byte-level writes? A: Yes, the AT24C08C-SSHM-T supports byte-level writes as well as page writes.
Q: What is the write cycle time for the AT24C08C-SSHM-T? A: The write cycle time for the AT24C08C-SSHM-T is 5 milliseconds for a full page write.
Q: What happens when the AT24C08C-SSHM-T is powered off? A: When powered off, the AT24C08C-SSHM-T retains the data in memory. It is non-volatile.
Q: Is the AT24C08C-SSHM-T compatible with both 3.3V and 5V systems? A: Yes, the AT24C08C-SSHM-T is compatible with both 3.3V and 5V systems.
Q: Can the AT24C08C-SSHM-T be used in an automotive application? A: Yes, the AT24C08C-SSHM-T can be used in automotive applications as long as the operating voltage and temperature range are within specification.
Q: What is the temperature range for the AT24C08C-SSHM-T? A: The temperature range for the AT24C08C-SSHM-T is -40°C to +85°C.
Q: Can the AT24C08C-SSHM-T be used for storing configuration data in embedded systems? A: Yes, the AT24C08C-SSHM-T is ideal for storing configuration data in embedded systems.
Q: Does the AT24C08C-SSHM-T have a low power consumption? A: Yes, the AT24C08C-SSHM-T has low power consumption in both active and standby modes.
This covers the detailed pinout, functions, and FAQ of the AT24C08C-SSHM-T EEPROM. If you need more in-depth information or further clarifications, feel free to ask!
