General Description The MICRF004 QwikRadio™ VHF receiver is a single-chip OOK (on-off keyed) receiver IC for remote wireless applications. This device is a true single-chip, “antenna-in, data-out” device. All RF and IF tuning is accomplished automatically within the IC which eliminates manual tuning production costs and results in a highly reliable, extremely low-cost solution for high-volume wireless applications. Features • Complete VHF receiver on a monolithic chip • 140MHz to 200MHz frequency range • >200 meters typical range with monopole antenna • 2.5kb/s sweep- and 10kb/s fixed-mode data rates • Automatic tuning, no manual adjustment • No filters or inductors required • Low 240µA operating supply current at 150MHz (10:1 duty cycle) • Shutdown mode for >100:1 duty-cycle operation • Wakeup for enabling decoders and microprocessors • Very low RF antenna reradiation • CMOS logic interface for standard ICs • Extremely low external part count Applications • Automotive remote keyless entry • Long range RF identification • Remote fan and light control • Garage door and gate openers
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