AT25080B-PU

Memory IC Overview

The AT25080B-PU is an 8Kb (1024 x 8) serial electrically erasable programmable read-only memory (EEPROM) manufactured by Microchip Technology. It operates within a supply voltage range of 1.8V to 5.5V and supports SPI clock frequencies up to 20 MHz at 5V, 10 MHz at 2.7V, and 5 MHz at 1.8V. The device utilizes an 8-lead Plastic Dual Inline Package (PDIP). It features self-timed write cycles with a maximum duration of 5 ms, block write protection for one-quarter, one-half, or the entire array, and a dedicated Write Protect pin. Endurance is rated at one million write cycles, with data retention specified for 100 years.

Memory IC Feature Summary

• Supports Serial Peripheral Interface (SPI) modes 0 and 3 with a three-wire interface consisting of Chip Select, Serial Data Input, Serial Data Output, and Serial Clock pins.
• Provides hardware and software data protection through a Write Protect pin and programmable block write protection levels covering specific memory segments.
• Includes a HOLD pin that allows suspension of serial communication without resetting the internal sequence.
• Features a 32-byte page mode capability for efficient sequential data writing operations.

Memory IC Applications

• Industrial and commercial applications requiring low-power and low-voltage operation
• Systems utilizing 6805 and 68HC11 series microcontrollers
• Data storage for configuration parameters and calibration values

Memory IC Procurement Notes

Verify the package type corresponds to the 8-lead PDIP designation when sourcing this component. Confirm the operating temperature range requirements align with the industrial specification limits defined in the datasheet. Ensure the system design accommodates the specific voltage thresholds for logic high and low states across the full supply voltage range.

Memory IC Selection Notes

Select this component for designs requiring non-volatile storage with robust write endurance and flexible protection schemes. Consider the 8-lead PDIP package for through-hole mounting requirements. Evaluate the need for hardware write protection if the application demands strict immunity against inadvertent data modification during operation.

Memory IC Part Context

This part belongs to the AT25080B/160B family of serial EEPROMs. The 'B' suffix indicates the specific generation of the device architecture. The '-PU' suffix specifically denotes the 8-lead Plastic Dual Inline Package form factor available in bulk packaging. This family shares functional similarities with other serial EEPROMs but offers distinct performance characteristics regarding speed and power consumption.

Memory IC Replacement Considerations

AT25080B-PU

Memory IC FAQ

How does the Write Protect (WP) pin function?

When the WP pin is held low and the WPEN bit in the status register is set to '1', all write operations to the status register and protected memory blocks are inhibited. If the WPEN bit is '0', the WP pin function is disabled.

What happens if more than 32 bytes are written in a single sequence?

The AT25080B supports 32-byte page writes. If more than 32 bytes are transmitted, the address counter rolls over, causing the previously written data in the current page to be overwritten.