The AT24C04C-SSHM-T is part of the Atmel (now acquired by Microchip Technology) family of EEPROM ( Electrical ly Erasable Programmable Read-Only Memory ) ICs. It is a 4K-bit (512-byte) I2C-compatible EEPROM that is commonly used in a variety of applications for storing data such as configuration settings, device parameters, and other persistent information.
Packaging and Pin Function Specifications
The AT24C04C-SSHM-T comes in a TSSOP-8 (Thin Shrink Small Outline Package) package. It has 8 pins in total. Here is the detailed explanation of the pin functions for the AT24C04C-SSHM-T in this packaging.
Pinout Table Pin No. Pin Name Pin Function Description 1 A0 Address Pin 0. Used to select the 8-bit address (for multi-chip configurations). 2 A1 Address Pin 1. Used to select the 8-bit address (for multi-chip configurations). 3 A2 Address Pin 2. Used to select the 8-bit address (for multi-chip configurations). 4 GND Ground Pin. Provides the return path for electrical current. 5 SDA Serial Data Line. Bi-directional data line used for Communication in I2C protocol. 6 SCL Serial Clock Line. Clock signal used in I2C communication to synchronize data. 7 WP Write Protect Pin. Controls whether write operations are allowed on the EEPROM. 8 VCC Power Supply Pin. Provides power to the device, typically 2.5V to 5.5V.Pin Function Description
A0, A1, A2 (Address Pins) These are used to configure the address of the device when more than one AT24C04C-SSHM-T is connected on the same I2C bus. When these pins are connected to GND (logic low), the corresponding bits of the I2C address are zero. When they are connected to VCC (logic high), the bits are one. These pins allow for up to 8 different devices to be addressed on the same bus.
GND (Ground Pin) This pin must be connected to the system ground for proper device operation. It provides a reference voltage for the other pins and is essential for completing the electrical circuit.
SDA (Serial Data Line) The SDA pin is used for bi-directional data transfer on the I2C bus. Data is transferred to and from the EEPROM via this line. It follows the I2C communication protocol and requires appropriate timing and signal control for proper data exchange.
SCL (Serial Clock Line) The SCL pin provides the clock signal to synchronize the data transfer on the SDA line. This is also part of the I2C communication protocol, where the clock dictates when each bit of data is transmitted.
WP (Write Protect Pin) The WP pin can be used to prevent accidental writing to the EEPROM memory. When this pin is connected to VCC, the write protection is activated, and no write operations can be performed. If connected to GND, the write protection is disabled, allowing write operations to be performed.
VCC (Power Supply Pin) The VCC pin supplies the power to the device. It typically operates within a voltage range of 2.5V to 5.5V. Proper voltage levels must be maintained for the device to function correctly.
Frequently Asked Questions (FAQ)
Q: What is the AT24C04C-SSHM-T? A: The AT24C04C-SSHM-T is a 4K-bit (512-byte) EEPROM that communicates using the I2C protocol, typically used for storing small amounts of persistent data.
Q: How many pins does the AT24C04C-SSHM-T have? A: The AT24C04C-SSHM-T has 8 pins in total.
Q: What is the maximum supply voltage for the AT24C04C-SSHM-T? A: The maximum supply voltage (VCC) for the AT24C04C-SSHM-T is 5.5V.
Q: What is the function of the A0, A1, A2 pins on the AT24C04C-SSHM-T? A: These pins allow for address selection when multiple AT24C04C-SSHM-T chips are connected to the same I2C bus. They help differentiate between devices by setting the I2C address.
Q: What happens if the WP pin is connected to VCC? A: If the WP pin is connected to VCC, the EEPROM's write protection feature is enabled, and no write operations can be performed.
Q: How do I communicate with the AT24C04C-SSHM-T? A: Communication with the AT24C04C-SSHM-T occurs via the I2C protocol using the SDA and SCL pins for data transfer and clocking, respectively.
Q: Can I use the AT24C04C-SSHM-T for large data storage? A: No, the AT24C04C-SSHM-T has a storage capacity of 4K-bits (512 bytes), which is suitable for storing small amounts of data, such as configuration settings.
Q: What is the write cycle time of the AT24C04C-SSHM-T? A: The write cycle time of the AT24C04C-SSHM-T is typically 5 ms.
Q: Can I connect multiple AT24C04C-SSHM-T devices to the same I2C bus? A: Yes, multiple devices can be connected to the same I2C bus by configuring each device's address pins (A0, A1, A2) to different combinations of VCC and GND.
Q: What is the power consumption of the AT24C04C-SSHM-T? A: The power consumption depends on the operating conditions, but the AT24C04C-SSHM-T typically consumes very low power, especially in idle mode.
Q: How do I read data from the AT24C04C-SSHM-T? A: To read data, you initiate a read command on the I2C bus, and the data will be sent from the EEPROM to the master device.
Q: Can I use the AT24C04C-SSHM-T for high-speed applications? A: No, the AT24C04C-SSHM-T is not suitable for high-speed applications, as the I2C protocol is relatively slow compared to other communication methods.
Q: What is the I2C address of the AT24C04C-SSHM-T? A: The I2C address is determined by the configuration of the A0, A1, and A2 pins, with a base address of 0x50.
Q: What is the write protection feature of the AT24C04C-SSHM-T? A: The write protection feature prevents writing to the EEPROM when the WP pin is connected to VCC, helping to preserve stored data.
Q: Can the AT24C04C-SSHM-T be used in automotive applications? A: Yes, the AT24C04C-SSHM-T is suitable for automotive applications where small amounts of data need to be stored persistently.
Q: Does the AT24C04C-SSHM-T have any built-in error detection? A: No, the AT24C04C-SSHM-T does not have built-in error detection. External error checking methods should be used if required.
Q: Can I use the AT24C04C-SSHM-T in a 3.3V system? A: Yes, the AT24C04C-SSHM-T can operate at a supply voltage of 3.3V, but it is important to ensure that the I2C voltage levels are compatible.
Q: What is the data retention time of the AT24C04C-SSHM-T? A: The AT24C04C-SSHM-T has a data retention time of up to 100 years at 25°C.
Q: How many write cycles can the AT24C04C-SSHM-T endure? A: The AT24C04C-SSHM-T typically supports up to 1 million write cycles per memory cell.
Q: What is the temperature range for the AT24C04C-SSHM-T? A: The AT24C04C-SSHM-T can operate within the temperature range of -40°C to +85°C.
I hope this detailed breakdown and FAQ section helps you understand the AT24C04C-SSHM-T and its pinout! Let me know if you need any further clarification or assistance.
