U4221B

www.DataSheet.co.kr U4221B Radio Controlled Clock Receiver Description The U4221B is a bipolar integrated straight through receiver circuit in the frequency range of 60 to 80 kHz. The device is designed for radio controlled clock application. Features D Low power consumption D Very high sensitivity D High selectivity by quartz resonator D Stop-function available D Only a few external components necessary D Digitized serial output signal Block Diagram PON 14 TCO 13 FSI 12 NC 10 VCCD 9 VCCA 16 Power supply Driver Comparator FSS 11 GND 15 AGC CAGC 4 IN2 1 IN1 2 Amplifier 1 Amplifier 2 Demodulator 3 GND (analog) 8 OUTA1 6 INA2 Figure 1. 7 GND (digital) 5 CDEM 93 7506 e TELEFUNKEN Semiconductors Rev. A1, 15-May-96 1 (12) Preliminary Information Datasheet pdf - http://www.DataSheet4U.net/ www.DataSheet.co.kr U4221B Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol IN2 IN1 GND CAGC CDEM INA2 GND OUTA1 VCCD NC FSS FSI TCO PON GND VCCA Function Amplifier 1 - Input 2 Amplifier 1 - Input 1 Analog ground Time constant of AGC Low pass filter Amplifier 2 input Digital ground Amplifier 1 output Supply voltage (digital) Not connected Field strength select Field strength indication Time code output Power ON/OFF control Ground (substrate) Supply voltage (analog) IN2 1 16 VCCA IN1 2 15 GND GND 3 14 PON CAGC 4 13 TCO U 4221 B CDEM 5 12 FSI INA2 6 11 FSS GND 7 10 NC OUTA1 8 93 7507 e 9 VCCD IN1, IN2 IN2 is connected to Pin 16 (VCCA). A...