11AA160T-I/SN

Overview

The Microchip Technology 11AA160T-I/SN is a 16 Kbit serial electrically erasable programmable read-only memory (EEPROM) utilizing the UNI/O single I/O bus interface. It features a 2048 x 8 bit organization with a 16-byte page write buffer. The device operates within a supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to +85°C. Key electrical characteristics include a maximum serial bus frequency of 100 kHz, typical active current of 1 mA, and maximum standby current of 1 µA. It offers high reliability with 1,000,000 erase/write cycle endurance and data retention exceeding 200 years.

Feature Summary

• Supports the patented UNI/O single I/O serial protocol using Manchester encoding for combined clock and data transmission on the SCIO pin.
• Includes built-in power-on/off data protection circuitry and a write enable latch to prevent accidental writes.
• Features configurable block write protection allowing selection of none, 1/4, 1/2, or all array segments.
• Incorporates Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Parameter logging in low-power sensors
• Device identification and security code storage

Procurement Notes

Verify the specific suffix 'I/SN' corresponds to the Industrial temperature range (-40°C to +85°C) and SOIC-8 package as documented in the datasheet. Confirm that the 'T' designation indicates tape and reel packaging if required for automated assembly. Ensure compatibility with the master controller's ability to implement the UNI/O Manchester encoding protocol rather than standard SPI or I2C interfaces.

Selection Notes

Select this component when a single-pin serial interface is preferred to minimize microcontroller I/O usage. It is suitable for applications requiring low standby current and robust write protection mechanisms. Consider the 16-byte page buffer size for write efficiency. Verify that the host system can generate the specific start header and acknowledge sequences defined in the UNI/O protocol specification.

Part Context

This part belongs to the 11AA/11LC family of 1 Kbit to 16 Kbit serial EEPROMs. The 'AA' variant specifically supports low-voltage operation down to 1.8V, distinguishing it from the 'LC' series which typically requires a minimum of 2.5V. The family shares common command sets and physical package options, facilitating design scalability across different memory density requirements.

Replacement Considerations

The 11AA161-I/SN serves as a direct substitute with an alternative device address code (0xA1 vs 0xA0). Other family members like the 11AA080 or 11AA040 offer lower densities but share identical interface and electrical characteristics. Cross-referencing the device address byte is critical when substituting to avoid bus conflicts.