11AA080-I/MS

Overview

The Microchip Technology 11AA080-I/MS is an 8 Kbit serial electrically erasable programmable read-only memory (EEPROM) utilizing the UNI/O single I/O bus interface. It features a 1,024 x 8 bit organization with a 16-byte page-write buffer. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports a maximum serial bus frequency of 100 kHz. Designed for industrial applications, it functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding on the SCIO pin.
• Includes built-in write protection mechanisms such as power-on/off data protection and a write enable latch.
• Features block write protection allowing configuration to protect none, one-quarter, one-half, or all of the memory array.
• Provides high reliability with over one million erase/write cycles endurance and greater than 200 years of data retention.

Applications

• Microcontroller system configuration storage
• Calibration data and parameter logging
• Device identification and security codes

Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific density variant corresponds to the application requirements. Ensure compatibility with the host controller's ability to implement the UNI/O protocol timing and signaling standards before finalizing procurement.

Selection Notes

Select this component when a low-pin-count solution is required for non-volatile data storage in space-constrained designs. The UNI/O interface minimizes GPIO usage compared to standard SPI or I2C devices. Consider the 1.8 V minimum operating voltage for low-power battery-operated systems requiring robust data retention without complex bus arbitration.

Part Context

This part belongs to the 11AAXXX family of UNI/O serial EEPROMs from Microchip Technology. The family offers densities ranging from 1 Kbit to 16 Kbit. The 'AA' designation indicates support for low-voltage operation down to 1.8 V, distinguishing it from the 'LC' series which typically requires a minimum of 2.5 V.

Replacement Considerations

Direct functional substitutes within the same UNI/O family include the 11AA040 and 11AA160. For pin-compatible replacements with different densities, verify the address bits and page size constraints. Cross-technology replacements like SPI EEPROMs require significant firmware modifications due to interface differences.