11AA161T-I/MS

Overview

The Microchip Technology 11AA161T-I/MS is a 16 Kbit (2,048 x 8) serial EEPROM utilizing the UNI/O single-wire interface. It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 100 kHz. The device features a 16-byte page-write buffer, self-timed write cycles, and block write protection. It is housed in an 8-lead MSOP package and rated for industrial temperatures from -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 power-on/off data protection circuitry and a write enable latch for enhanced reliability.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides flexible block write protection allowing none, one-quarter, one-half, or all of the memory array to be protected.

Applications

• Interfacing with microcontrollers requiring low-pin-count non-volatile storage
• Embedded systems needing configuration data retention
• General-purpose applications utilizing single-wire communication buses

Procurement Notes

Verify that the specific part number corresponds to the UNI/O interface family rather than the I2C variant. Confirm the 'I' suffix indicates the industrial temperature range (-40°C to +85°C). Ensure the 'MS' suffix matches the required 8-lead MSOP package type for your PCB layout.

Selection Notes

Select this component when a single-wire interface is preferred over multi-wire protocols to minimize pin usage. Choose the 11AA161 series specifically if the device address code '0001' is required to avoid conflicts with other devices on the bus. Consider the 1.8V minimum operating voltage for low-power system designs.

Part Context

This device belongs to the 11XX family of serial EEPROMs, which includes densities from 1 Kbit to 16 Kbit. The 'AA' designation identifies it as part of the UNI/O bus family capable of operation down to 1.8V, distinct from the 'LC' family which requires a minimum of 2.5V.

Replacement Considerations

The 11AA161T-I/SN serves as a direct replacement offering identical electrical specifications and functionality but utilizes an 8-lead SOIC package instead of the MSOP form factor.