MC145027DW

Encoders, Decoders, Converters Overview

The MC145027DW is a CMOS decoder integrated circuit designed for remote control applications. It receives serial data streams and interprets five trinary digits as an address code, supporting 243 unique addresses with trinary encoding or 32 with binary encoding. The remaining four bits are decoded as binary data. A Valid Transmission (VT) output activates only when two consecutive matching addresses and data bits are received. Operating voltage ranges from 4.5 V to 18 V, with an operating temperature range of –40°C to +85°C.

Encoders, Decoders, Converters Feature Summary

• Decodes five-bit trinary address codes and four-bit binary data
• Validates transmissions by requiring two consecutive matching address and data sequences
• Features internal power-on reset to force all outputs low upon startup

Encoders, Decoders, Converters Applications

• Remote control receiver systems
• RF, ultrasonic, or infrared demodulator interfaces
• Security systems requiring address verification

Encoders, Decoders, Converters Procurement Notes

Verify the datasheet revision and manufacturer documentation to confirm current production status and compliance specifications. Ensure the SOG package variant matches the required footprint and pinout configuration for the specific design implementation.

Encoders, Decoders, Converters Selection Notes

Select this component when a decoder is required to process five-bit addresses and four-bit data. Verify that the supply voltage meets the minimum 4.5 V requirement. Consider the SC41343 if a lower voltage operation between 2.8 V and 10 V is necessary.

Encoders, Decoders, Converters Part Context

This device belongs to the MC145026/27/28 family of encoder and decoder pairs originally developed by Motorola. These components are widely used in consumer electronics for wireless control applications due to their simple RC oscillator requirements and high external component tolerance.

Encoders, Decoders, Converters Replacement Considerations

SC41343 is a low-voltage version compatible with the MC145027, operating between 2.8 V and 10 V.