11LC040-I/MS

Overview

The Microchip Technology 11LC040-I/MS is a 4 Kbit serial electrically erasable programmable read-only memory (EEPROM) organized as 512 x 8 bits. It operates within a supply voltage range of 2.5 V to 5.5 V and supports a maximum bus frequency of 100 kHz via the UNI/O single-wire interface. The device is housed in an 8-lead MSOP package and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports the UNI/O single I/O serial interface protocol using Manchester encoding for combined clock and data transmission on the SCIO pin.
• Includes a 16-byte page-write buffer to allow efficient sequential data writing and internal address pointer management.
• Features built-in write protection mechanisms including power-on/off data protection, a write enable latch, and block write protection capabilities.

Applications

• Microcontroller-based systems requiring non-volatile storage for configuration parameters or calibration data
• Industrial control devices needing reliable data retention under varying environmental conditions
• Low-pin-count embedded applications utilizing single-wire communication interfaces

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm that the design environment supports the UNI/O protocol timing requirements. Ensure supply voltage levels remain strictly within the specified operational limits to maintain data integrity and device reliability during all read and write cycles.

Selection Notes

Select this component when a single-wire interface is preferred to minimize pin count and PCB routing complexity. It is suitable for applications requiring moderate storage density with high endurance and long data retention periods. Consider the MSOP package constraints regarding thermal dissipation and physical space availability on the target circuit board layout.

Part Context

This part belongs to the 11LCXXX family of serial EEPROMs from Microchip Technology. These devices are designed for low-power applications and utilize CMOS technology. The family shares common architectural features such as the UNI/O bus interface and similar command sets, differing primarily in memory density and package options.

Replacement Considerations

Compatible substitutes include other members of the 11LC series such as the 11LC010, 11LC020, 11LC080, and 11LC160, provided the memory capacity meets system requirements. Alternative packages like SOIC or PDIP may be used if pin compatibility and footprint allow.