MC145026P

Encoders, Decoders, Converters Overview

The MC145026P is a CMOS encoder designed for remote control applications, operating within a voltage range of 2.5 to 18 V and an industrial temperature range of –40 to +85°C. It encodes nine lines of trinary or binary data into a serial stream upon receiving a transmit enable signal. The device utilizes an internal RC oscillator without requiring a crystal, supporting frequencies from 1 kHz to 400 kHz. Key electrical characteristics include a maximum standby current of 300 nA at 25°C and high external component tolerance allowing ±5% resistor and capacitor values.

Encoders, Decoders, Converters Feature Summary

• Encodes nine input lines into serial trinary or binary data for transmission
• Features very-low standby current consumption in power-down mode
• Operates with standard RC oscillator components without crystals
• Compatible with RF, ultrasonic, or infrared modulation interfaces

Encoders, Decoders, Converters Applications

• Remote control systems using RF, ultrasonic, or infrared carriers
• Security alarm transmitters requiring address verification
• Industrial automation wireless switches
• Consumer electronics remote interfaces

Encoders, Decoders, Converters Procurement Notes

Verify the specific package suffix 'P' corresponds to the Plastic DIP (Case 648) configuration as documented in the datasheet. Confirm that the manufacturing date code aligns with the guaranteed wider voltage range specifications if applicable. Ensure compatibility with the intended decoder pair, such as the MC145027 or MC145028, for proper system operation.

Encoders, Decoders, Converters Selection Notes

Select this encoder when trinary addressing or binary data transmission is required for remote control links. It pairs specifically with the MC145027 for five-bit address and four-bit data decoding, or the MC145028 for nine-bit address-only decoding. Consider the SC41343/SC41344 variants if a lower voltage range of 2.8 to 10 V is necessary instead of the full 18 V capability.

Encoders, Decoders, Converters Part Context

Originally manufactured by Motorola and subsequently Freescale Semiconductor, this component is now part of NXP's portfolio following their acquisition. The MC145026 belongs to a family of CMOS encoder/decoder pairs widely used in legacy and modern remote control designs. It serves as the transmitter counterpart to the MC145027 and MC145028 decoders.

Encoders, Decoders, Converters Replacement Considerations

The SC41342 has been discontinued; the MC145026 serves as a drop-in replacement for previous low-voltage designs. For lower voltage requirements, the SC41343 and SC41344 are available equivalents.