U3600BM

www.DataSheet4U.com Features All Functions and Channel Selections are Controlled by Serial Bus RF Part All Oscillators and PLL Integrated IF Converter FM Demodulator RSSI Low Frequency Part Asymmetrical Input of Microphone Amplifier Asymmetrical Output of Earpiece Amplifier Compander Power Supply Management Serial Bus Single-chip Cordless Telephone IC U3600BM Preliminary Application CT0 Standard Narrowband Voice and Data Transmitting/Receiving Systems Description The programmable single-chip multichannel cordless phone IC includes all necessary low frequency parts such as microphone- and earphone amplifier, compander, powersupply management as well as all RF parts such as IF converter, FM demodulator, RSSI, oscillators and PLL. Several gains and mutes in transmit and receive direction are controlled by the serial bus. The compander can be bypassed. www.DataSheet4U.com Rev. 4516C–CT0–08/02 1 DataSheet 4 U .com www.DataSheet4U www.DataSheet4U.com 4U.com www.DataSheet4U.com Figure 1. Block Diagram MIX1IN2 41 42 GNDLO OSCGND 38 37 Crystal Oscillator MIX2IN MIX2O MIX2GND 35 34 Mixer2 33 MIX1IN1 40 Mixer1 MIX1O 39 XCK VAF 36 IFIN1 32 IFIN2 31 IF Amp RSSI MUXDA D A + ETC 30 EXIN 29 Expander Ear Amp 27 28 RECO1 RECO2 f LO LO2 LO1 43 44 VCO3 :2 f LO f LO f Ref3 Serial Bus :K Bias Bat low Detector Demodulator 26 :N RXO sin PCLO 1 1 cos (3) Phase Comparator 25 + DATRX 1.5V Mic + 24 VRMIC 23 22 21 20 + Spl 1.5V Limiter Amp 13 14 15 1...