25LC080BT-I/ST

Overview

The Microchip Technology 25LC080BT-I/ST is an 8 Kbit Serial Electrically Erasable PROM featuring a 1024 x 8-bit organization. It utilizes a standard SPI-compatible serial bus with SCK, SI, SO, and CS signals for communication. The device supports a maximum clock frequency of 10 MHz and operates within a supply voltage range of 2.5V to 5.5V. It includes a 32-byte page write capability and self-timed erase/write cycles with a maximum duration of 5 ms. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature operation from -40°C to +85°C.

Feature Summary

• Supports high-speed synchronous serial communication via a four-wire SPI compatible interface.
• Features programmable block write protection allowing selective array security.
• Includes built-in power-on/off data protection circuitry and a write enable latch mechanism.
• Provides a hold function to pause serial transmission without resetting the sequence.

Applications

• Data storage for microcontroller system parameters
• Configuration memory for embedded devices
• Non-volatile data logging applications

Procurement Notes

Verify that the specific suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'ST' indicates the TSSOP package type as defined in the official datasheet. Confirm the 'B' version designation aligns with the required 32-byte page size functionality before finalizing procurement specifications.

Selection Notes

Select this component when a low-power CMOS EEPROM with SPI interface is required for industrial environments. Ensure the application voltage remains within the 2.5V to 5.5V operating range. Consider the 32-byte page size for write efficiency compared to older versions. Verify that the TSSOP package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the 25XX080A/B family of 8K SPI Bus Serial EEPROMs manufactured by Microchip Technology. The family encompasses variants with different voltage ranges (AA vs LC), page sizes (A vs B), and temperature ratings (I vs E). The 25LC080BT-I/ST specifically represents the automotive-grade voltage range but industrial temperature variant with the advanced packaging option.

Replacement Considerations

Cross-reference with other 25LC080B variants such as 25LC080BT-I/MS or 25LC080BT-E/ST if package or temperature requirements differ. Ensure substitute parts maintain the same 32-byte page size and SPI pinout compatibility.

FAQ

What is the page size for the 25LC080BT device?

The 25LC080BT device features a 32-byte page size, distinguishing it from the 'A' version which has a 16-byte page size.

How does the HOLD pin function during operation?

The HOLD pin allows the user to suspend transmission to the device mid-sequence without resetting the serial address pointer. Communication resumes when the pin is returned high while the clock is low.

What is the purpose of the WPEN bit in the Status Register?

The WPEN bit acts as an enable for the hardware Write-Protect (WP) pin. When set high, the WP pin can enforce hardware write protection; when low, the WP pin function is disabled.