Communication ICs IF detector IC for 900MHz spread spectrum cordless phones BH4127FV The BH4127FV is a mixer, IF amplifier, and FM detector IC developed for use with 900MHz spread spectrum cordless phones Applications 900MHz spread spectrum cordless phones Features 1) Built-in mixer circuit, IF circuit, RSSI circuit, and FM detector circuit. 2) Operates at mixer input frequencies ranging from 20 to 300 MHz. 3) Equipped with a battery save function. 4) FM detector circuit demodulates up to ±750kHzdev. 5) FM detector circuit demodulates up to 2.6Mbps. Absolute maximum ratings (Ta = 25C, with the measurement circuit) Recommended operating conditions 535 Communication ICs Block diagram 536 Communication ICs BH4127FV Pin descriptions 537 Communication ICs 538 BH4127FV Communication ICs BH4127FV Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 3.0V) Signal source: fIN (MIX) = 254.4MHz, fIN (LO) = 243.2MHz, 100dBµV, fIN (IF) = 11.2MHz AC level to be indicated by termination 539 Communication ICs Signal source: fIN (IF) = 11.2MHz, ∆f = ±100kHz dev, fm = 1kHz AC level to be indicated by termination 540 BH4127FV Communication ICs BH4127FV Measurement circuit 541 Communication ICs Application example 542 BH4127FV Communication ICs BH4127FV External dimensions (Units: mm) 543