11LC161T-E/TT

Overview

The Microchip Technology 11LC161T-E/TT is a 16 Kbit serial electrically erasable programmable read-only memory (EEPROM) utilizing the UNI/O single-wire interface. It features a 2,048 x 8 organization and operates within a voltage range of 2.5 V to 5.5 V. The device supports a maximum clock frequency of 100 kHz and includes a 16-byte page-write buffer. It offers high reliability with 1,000,000 erase/write cycles and data retention exceeding 200 years. The component is housed in a 3-lead SOT-23 package and is rated for an extended industrial temperature range from -40°C to +125°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 circuitry and a write enable latch.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides block write protection allowing configuration to protect none, one-quarter, one-half, or all of the memory array.

Applications

• Microcontroller systems requiring low-pin-count non-volatile storage
• Industrial control applications operating in extended temperature environments
• Automotive electronic modules needing high reliability and ESD protection

Procurement Notes

Verify that the specific part number suffix corresponds to the Automotive grade (-E) and SOT-23-3 package (-TT). Confirm the device address code matches system requirements, as the '1' suffix indicates a hardwired device code distinct from the '0' variant. Ensure supply chain sources provide original manufacturer documentation to validate RoHS compliance and temperature ratings.

Selection Notes

Select this component when a single-wire interface is required to minimize PCB trace count compared to standard I2C devices. Choose the Automotive grade (-E) version for applications demanding operation up to +125°C. Consider the 16K density and 16-byte page buffer size relative to system write performance needs. Verify compatibility with master controllers capable of generating the specific UNI/O Manchester encoded timing sequences.

Part Context

This device belongs to the 11LCXXX family of 1 Kbit through 16 Kbit serial EEPROMs manufactured by Microchip Technology. The family shares common architectural features including the UNI/O interface and similar command sets, differentiated primarily by memory density and device address codes. The 11LC161 specifically utilizes the '1' device code to allow coexistence with '0' coded devices on the same bus without address conflicts.

Replacement Considerations

The 11AA161T-E/TT is a comparable part within the same family offering identical functionality but supporting a lower minimum voltage of 1.8V. Other 11LC161 variants exist in different packages such as MSOP or TDFN, which may serve as physical replacements if pinout compatibility allows.