AT25128B-SSHL-T Detailed explanation of pin function specifications and circuit principle instructions

The model AT25128B-SSHL-T is a part from Microchip Technology. Specifically, it is a Serial EEPROM ( Electrical ly Erasable Programmable Read-Only Memory ), designed for use in a variety of applications such as storage and data retention. The device is part of the AT25 Series of EEPROM chips produced by Microchip.

This specific model, AT25128B-SSHL-T, is a 128 Kbit (16 Kbyte) EEPROM in a SOIC-8 package (Small Outline Integrated Circuit).

Here is a detailed explanation of the pin functions and circuit principle, along with a list of pin functions for all pins of the device:

Package and Pin Count:

The AT25128B-SSHL-T comes in the SOIC-8 package, which means it has 8 pins.

Pin Function List (for the SOIC-8 Package):

Pin Number Pin Name Pin Description 1 CS Chip Select. Active low input used to select the chip for communication. 2 SO Serial Output. Output pin for data from the EEPROM to the MCU or system. 3 W Write Protect. When held low, the device is in write-protection mode, preventing writes to memory. 4 VSS Ground pin. Connect to the system ground. 5 SCK Serial Clock . Clock input for data transfer. 6 SI Serial Input. Data input pin for transferring data to the EEPROM. 7 VCC Power supply pin. Connect to the system’s power source. 8 HOLD Hold. When held low, it pauses the operation, preventing further clocking.

Circuit Principle:

The AT25128B-SSHL-T operates based on serial communication with an external microcontroller or system. It uses the SPI (Serial Peripheral Interface) protocol for data transfer, where:

CS (Chip Select) is used to enable the chip for communication. SCK (Serial Clock) drives the data transfer clock. SI (Serial Input) is used to transfer data to the EEPROM. SO (Serial Output) is used to read data back from the EEPROM. W (Write Protect) ensures that the data cannot be modified when it's set low. HOLD is used to pause communication temporarily.

20 Common FAQ for AT25128B-SSHL-T:

Q: What is the memory size of the AT25128B-SSHL-T? A: The AT25128B-SSHL-T has a memory size of 128 Kbits (16 Kbytes).

Q: What is the operating voltage range for the AT25128B-SSHL-T? A: The operating voltage range for the AT25128B-SSHL-T is 2.5V to 5.5V.

Q: What is the package type for the AT25128B-SSHL-T? A: The AT25128B-SSHL-T comes in an SOIC-8 package.

Q: How many pins does the AT25128B-SSHL-T have? A: The AT25128B-SSHL-T has 8 pins.

Q: What type of memory is the AT25128B-SSHL-T? A: The AT25128B-SSHL-T is an EEPROM (Electrically Erasable Programmable Read-Only Memory).

**Q: What is the function of the *CS* pin?** A: The CS pin is the Chip Select pin. It is used to activate or deactivate the EEPROM chip for communication.

**Q: What does the *W* pin do?** A: The W pin is the Write Protect pin. When it is held low, it protects the memory from being written to.

**Q: What is the purpose of the *SCK* pin?** A: The SCK pin is the Serial Clock input, which synchronizes data transfer.

**Q: What does the *HOLD* pin do?** A: The HOLD pin temporarily halts serial communication, preventing further clocking.

Q: Can I use the AT25128B-SSHL-T for data logging? A: Yes, the AT25128B-SSHL-T is suitable for data logging applications due to its non-volatile memory.

Q: What is the SPI protocol supported by the AT25128B-SSHL-T? A: The AT25128B-SSHL-T supports the SPI (Serial Peripheral Interface) protocol for data communication.

Q: How fast can the AT25128B-SSHL-T communicate? A: The maximum clock speed for SPI communication is 20 MHz.

Q: Is the AT25128B-SSHL-T compatible with all microcontrollers? A: The AT25128B-SSHL-T is compatible with microcontrollers that support the SPI protocol.

Q: How do I read data from the AT25128B-SSHL-T? A: Data is read from the AT25128B-SSHL-T by sending the read command via the SI pin and receiving data through the SO pin.

Q: How do I write data to the AT25128B-SSHL-T? A: Data is written to the AT25128B-SSHL-T by sending the write command via the SI pin and using the SCK clock signal.

Q: Can I use the AT25128B-SSHL-T in a 5V system? A: Yes, the AT25128B-SSHL-T can operate in systems with a 5V power supply.

Q: What is the write endurance of the AT25128B-SSHL-T? A: The AT25128B-SSHL-T has a write endurance of 1 million cycles.

Q: How can I disable the write protection on the AT25128B-SSHL-T? A: Write protection can be disabled by setting the W pin high.

Q: Can I use the AT25128B-SSHL-T in automotive applications? A: Yes, the AT25128B-SSHL-T is rated for industrial and automotive environments.

Q: What is the maximum storage temperature for the AT25128B-SSHL-T? A: The AT25128B-SSHL-T can operate in temperatures ranging from -40°C to 85°C.

I hope this gives you a complete and detailed overview of the AT25128B-SSHL-T's pin functions, specifications, and common questions.