Communication ICs Second Mixer IF for digital cellular phones BH4128FV The BH4128FV is an IC equipped with internal second mixer and IF amplifier circuits, developed for use with digital cellular phones. Applications Digital cellular phones Features 1) Equipped with internal mixer, IF, and RSSI circuits. 2) Can be operated at mixer input frequencies ranging from 10MHz to 200MHz. 3) IF amplifier gain is 100 dB. 4) Equipped with a battery power saving function. Absolute maximum ratings (Ta = 25 C, for measurement circuit) Recommended operating conditions (Ta = 25 C, for measurement circuit) 83 Communication ICs Block diagram 84 BH4128FV Communication ICs BH4128FV Pin descriptions 85 Communication ICs 86 BH4128FV Communication ICs BH4128FV 87 Communication ICs Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 3.0V Signal source : fIN (MIX) = 130MHz, fIN (LO) = 129.55MHz, 100dB µV AC level to be indicated by termination) 88 BH4128FV Communication ICs BH4128FV Measurement circuit 89 Communication ICs Application example External dimensions (Units: mm) 90 BH4128FV