MC145026D

Encoders, Decoders, Converters Overview

The MC145026D is a CMOS encoder designed for remote control applications, manufactured by NXP USA Inc. It encodes nine lines of information into a serial stream upon receiving a transmit enable signal. The device supports trinary data encoding (low, high, or open) and binary data encoding (low or high). It features an internal RC oscillator that eliminates the need for a crystal. The operating voltage range is specified as 2.5 V to 18 V. The component is housed in a 16-SOG package.

Encoders, Decoders, Converters Feature Summary

• Encodes nine input lines into a serial data stream using trinary or binary logic states.
• Transmits encoded words twice per sequence to enhance transmission security.
• Utilizes an internal RC oscillator configuration, removing the requirement for external crystals.
• Interfaces directly with RF, ultrasonic, or infrared modulators and demodulators.

Encoders, Decoders, Converters Applications

• Remote control systems utilizing RF, ultrasonic, or infrared modulation.
• Consumer circuitry requiring low standby current operation.
• Applications necessitating secure address coding via trinary or binary inputs.

Encoders, Decoders, Converters Procurement Notes

Verify the specific manufacturing date code when sourcing this component, as production history indicates variations in guaranteed voltage ranges prior to specific cutoff dates. Confirm the package suffix matches the required mechanical footprint. Ensure compatibility with the intended decoder pair, such as the MC145027, within the system design constraints.

Encoders, Decoders, Converters Selection Notes

Select the MC145026D when a dedicated encoder is required to pair with compatible decoders like the MC145027 or MC145028. Consider the trinary input capability if higher address density is needed compared to binary-only solutions. Verify that the application environment remains within the specified temperature range of -40°C to +85°C for reliable operation.

Encoders, Decoders, Converters Part Context

This component belongs to the Motorola/NXP CMOS Encoder and Decoder Pairs family. It functions specifically as the transmitter unit in these pairs. The series includes complementary decoder devices, such as the MC145027 and MC145028, which interpret the serial data streams generated by the MC145026 for remote control implementations.

Encoders, Decoders, Converters Replacement Considerations

The SC41342 has been discontinued and replaced by the MC145026. Devices manufactured after date code 9314 are guaranteed over the wider voltage range. No other direct functional substitutes are documented in the provided datasheet.