MC145027P

Encoders, Decoders, Converters Overview

The MC145027P is a CMOS decoder integrated circuit designed for remote control applications. It operates within a supply voltage range of 4.5 V to 18 V and supports an operating temperature range from –40°C to +85°C. The device interprets five trinary address digits, enabling 243 unique addresses, alongside four bits of binary data. It features an internal power-on reset that forces all outputs low upon initialization. The component interfaces with RF, ultrasonic, or infrared modulators and demodulators using an RC oscillator without requiring a crystal.

Encoders, Decoders, Converters Feature Summary

• Validates consecutive matching address codes and data bits before activating the Valid Transmission output
• Supports trinary encoding for address inputs and binary decoding for data lines
• Includes internal power-on reset logic to initialize decoder states

Encoders, Decoders, Converters Applications

• Remote control systems utilizing RF, ultrasonic, or infrared transmission
• Security systems requiring multi-address code verification
• Wireless data transfer links using external modulators

Encoders, Decoders, Converters Procurement Notes

Verify the specific suffix 'P' indicates the Plastic DIP package (Case 648-08) when sourcing replacements. Confirm the manufacturer origin, as NXP USA Inc. acquired the original Motorola semiconductor division holding these part numbers. Ensure the component meets the required voltage and temperature specifications for the target environment.

Encoders, Decoders, Converters Selection Notes

Select the MC145027P when five trinary address bits and four binary data bits are required. Choose this over the MC145028 if data output pins are needed rather than pure address decoding. Ensure the paired encoder uses compatible RC timing components to maintain synchronization between the transmitter and receiver.

Encoders, Decoders, Converters Part Context

This component belongs to the MC145026/27/28 family of CMOS encoder and decoder pairs originally developed by Motorola. The series is widely used in consumer electronics for wireless control applications. The MC145027 specifically serves as the receiver counterpart to the MC145026 encoder, providing address validation and data latching capabilities.

Encoders, Decoders, Converters Replacement Considerations

SC41343P is a low-voltage version (2.8 V to 10 V) of the MC145027. Verify voltage compatibility before substitution.