PCF7900NHN/C0K/UJ

RF Transmitter Overview

The PCF7900NHN/C0K/UJ is a highly integrated UHF transmitter IC designed for ISM-band applications. It utilizes a fractional-N PLL architecture to support multi-channel operation across 315, 434, 868, and 915 MHz frequencies. The device features programmable OOK, ASK, and FSK modulation properties with adjustable transmit output power. Key electrical characteristics include a transmission current of 7 mA at 6 dBm output power. It incorporates independent power-down modes for the oscillator and PLL, achieving a standby current of 50 nA. The component is housed in a compact HVQFN16 package measuring 3 mm x 3 mm.

RF Transmitter Feature Summary

• Fractional-N PLL based UHF transmitter enabling robust multi-channel operation
• Programmable modulation properties including OOK, ASK, and FSK
• Independent power-down modes for oscillator and PLL to minimize standby current
• On-chip VCO and PLL loop filter reducing external component count

RF Transmitter Applications

• Automotive Remote Keyless Entry (RKE)
• Passive Keyless Entry (PKE) systems
• Garage Door Openers
• Remote Control devices
• Tire Pressure Monitoring Systems (TPMS)

RF Transmitter Procurement Notes

Verify the specific ordering suffix, such as ,118 or J, to confirm the correct packing quantity and reel specifications. Ensure the part number matches the required package variant, as the PCF7900 series includes both HVQFN16 and optional TSSOP16 configurations. Cross-reference the manufacturer's official documentation to validate the active status and revision level before procurement.

RF Transmitter Selection Notes

Select this component for designs requiring low bill of materials and flexible system integration. The internal VCO and loop filter simplify circuit layout by minimizing external passive components. Consider the available modulation options and frequency bands to ensure compatibility with regional ISM/SRD regulations. The low power consumption profile makes it suitable for battery-operated automotive and remote control applications.

RF Transmitter Part Context

This part belongs to the FraNTIC family of transmitters from NXP. It is an active product designed for high power efficiency. The series supports multiple frequency bands commonly used in automotive and industrial remote control applications. The device integrates the transmitter functionality into a single chip to enhance reliability and reduce design complexity.

RF Transmitter Replacement Considerations

Check for alternative part numbers within the same PCF7900 family that may offer different package options or slight parameter variations. Verify pin-to-pin compatibility if substituting with other variants in the series. Consult official replacement guides to ensure functional equivalence in terms of modulation and frequency coverage.