PCF7900NHN/C0K/UZ

RF Transmitter Overview

The PCF7900NHN is a highly integrated single-chip Fractional-N PLL UHF transmitter IC designed for ISM-band applications. It supports flexible system design with low bill of materials across 315, 434, 868, and 915 MHz frequencies. The device features programmable OOK/ASK/FSK modulation, adjustable transmit output power, and independent power-down modes for the oscillator and PLL to achieve ultra-low standby current. It integrates an on-chip VCO and PLL loop filter, minimizing external component count.

RF Transmitter Feature Summary

• Single-chip Fractional-N PLL transmitter architecture
• Programmable modulation properties including OOK, ASK, and FSK
• Independent power-down modes for oscillator and PLL
• Integrated on-chip VCO and PLL loop filter

RF Transmitter Applications

• Automotive Garage Door Opener
• Passive Keyless Entry (PKE)
• Remote Control
• Remote Keyless Entry (RKE)
• Tire Pressure Monitoring (TPMS)

RF Transmitter Procurement Notes

Verify the specific ordering suffix to confirm package type and tape-and-reel specifications. The part number ending in '118' or 'J' indicates standard product orientation and packing information. Confirm that the selected variant matches the required HVQFN16 or TSSOP16 package option for your PCB layout. Ensure compatibility with the intended ISM band frequency before finalizing procurement.

RF Transmitter Selection Notes

Select this component for designs requiring minimal external passive components due to the integrated VCO and loop filter. Consider the independent power-down capabilities if battery life optimization is critical for remote control applications. Verify that the programmable output power levels meet the range requirements for the specific garage door or keyless entry system architecture.

RF Transmitter Part Context

This transmitter belongs to NXP's portfolio of secure car access and automotive immobilizer solutions. It complements other RF components like the OL2300 and OL2311AHN in building complete sub-1 GHz RF link systems. The device is part of the broader strategy to provide highly integrated single-chip solutions for automotive environments, reducing complexity in PKE and RKE implementations.

RF Transmitter Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.