11LC080T-E/SN

Overview

The Microchip Technology 11LC080T-E/SN is an 8 Kbit (1,024 x 8) serial EEPROM utilizing the UNI/O single-wire interface. It operates within a voltage range of 2.5V to 5.5V and supports a maximum bus frequency of 100 kHz. The device features a 16-byte page-write buffer and includes block write protection capabilities. It is housed in an 8-lead SOIC package and is rated for industrial temperature ranges from -40°C to +125°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 to prevent accidental writes.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides hardware block write protection allowing selection of none, 1/4, 1/2, or all array segments.

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Parameter logging in low-pin-count sensors

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the device address code corresponds to the intended bus topology. Ensure the supply voltage meets the minimum operating threshold of 2.5V for this automotive-grade variant.

Selection Notes

Select this component when a single-wire interface is required to minimize pin count. It is suitable for applications needing high endurance and long data retention. Compare against the 11AA080 series if lower voltage operation down to 1.8V is necessary instead of the 2.5V minimum.

Part Context

This part belongs to the 11XX family of serial EEPROMs, which also includes 1Kbit, 2Kbit, 4Kbit, and 16Kbit variants. The 'LC' designation indicates a 2.5V minimum operating voltage, distinguishing it from the 'AA' series which supports 1.8V. The 'E' suffix denotes the extended industrial temperature range.

Replacement Considerations

11LC080T-I/SN

FAQ

How does the UNI/O interface differ from standard SPI?

The UNI/O interface uses a single bidirectional pin (SCIO) for both clock and data via Manchester encoding, whereas standard SPI typically requires separate pins for SCK, MOSI, MISO, and CS.

What is the function of the Write Enable Latch?

The Write Enable Latch must be set before any write operation can occur. It resets automatically after power-up, a successful write, or execution of the WRDI instruction to protect data integrity.