11AA160-I/MS

Overview

The Microchip Technology 11AA160-I/MS is a 16 Kbit (2,048 x 8) serial electrically erasable programmable read-only memory (EEPROM). It utilizes the UNI/O single I/O bus interface with Manchester encoding for clock and data synchronization. The device operates within a supply voltage range of 1.8V to 5.5V and supports a maximum bit rate of 100 kbps. It features a 16-byte page-write buffer and includes Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead MSOP package and is rated for industrial temperature operation from -40°C to +85°C.

Feature Summary

• Supports the UNI/O single I/O serial bus protocol using Manchester encoding on a dedicated SCIO pin.
• Includes built-in write protection mechanisms such as power-on/off data protection and a software-controlled write enable latch.
• Features a 16-byte page-write buffer to facilitate efficient sequential data writing operations.
• Provides block write protection capabilities allowing configuration to protect none, one-quarter, one-half, or the entire memory array.

Applications

• Embedded systems requiring low-pin-count non-volatile storage
• Microcontroller-based applications with limited I/O resources
• Industrial control devices operating in noisy environments

Procurement Notes

Verify that the specific ordering suffix corresponds to the MSOP-8 package type and Industrial (-I) temperature grade. Confirm that the required supply voltage aligns with the 1.8V to 5.5V operational range specified for the 11AA series. Ensure the design accommodates the UNI/O bus timing requirements, including start headers and acknowledge sequences, rather than standard SPI or I2C protocols.

Selection Notes

Select this component when a single-wire interface is necessary to conserve microcontroller pins. The 11AA160 offers lower minimum voltage operation compared to the 11LC family, making it suitable for 1.8V logic systems. Consider the 16-byte page size for write efficiency and verify that the application can handle the self-timed write cycle duration without blocking other critical tasks.

Part Context

This device belongs to the 11XX family of UNI/O serial EEPROMs manufactured by Microchip Technology. The family encompasses densities ranging from 1 Kbit to 16 Kbit. The 'AA' designation indicates support for 1.8V operation, while 'LC' variants are restricted to higher voltages. The 'I' suffix denotes the industrial temperature range, distinguishing it from automotive-grade parts.

Replacement Considerations

The 11LC160-I/MS serves as a functional substitute but requires a minimum supply voltage of 2.5V instead of 1.8V. Other 11AA160 variants include PDIP, SOIC, TDFN, and TO-92 packages. Verify that any replacement maintains compatibility with the UNI/O bus protocol and matches the required physical footprint if board space is constrained.