11AA161T-I/SN

Overview

The Microchip Technology 11AA161T-I/SN 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 bus 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 SOIC-8 package and rated for industrial temperature operation from -40°C to +85°C.

Feature Summary

• Supports the patented UNI/O single I/O serial protocol using Manchester encoding on the SCIO pin.
• Includes built-in power-on/off data protection and a write enable latch for array security.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides high reliability with one million erase/write cycle endurance and over 200 years of data retention.

Applications

• Interfacing with microcontrollers requiring low-pin-count non-volatile storage
• ASIC applications needing simple serial configuration memory
• Systems requiring discrete I/O line access for parameter storage

Procurement Notes

Verify that the specific part number matches the required density and interface type. Confirm the suffix indicates the correct package style and temperature grade. Ensure compatibility with the host controller's ability to generate the UNI/O Manchester encoded signals. Check for RoHS compliance requirements if applicable to the final assembly.

Selection Notes

Select this component when a single-wire interface is preferred to minimize pin count compared to standard I2C or SPI devices. The 11AA161 variant offers a unique device address code distinct from the 11AA160 series, allowing mixed usage on the same bus. Consider the 1.8V minimum operating voltage for low-power system designs.

Part Context

This device belongs to the 11XX family of 1 Kbit through 16 Kbit Serial Electrically Erasable PROMs. The 'AA' designation indicates support for 1.8V operation, while the '161' suffix specifies the 16 Kbit density with a hardwired device address code of '0001'. This distinguishes it from the '160' series which uses '0000'.

Replacement Considerations

The 11AA160T-I/SN is a compatible alternative within the same family but utilizes a different device address code ('0000' vs '0001'). Both share identical electrical characteristics and interfaces, allowing them to coexist on the same bus without conflict.