U2309B

U2309B VHF/ UHF-Tuner-IC Description This tuner IC requires a power supply of 9 V and performs the function of three separate oscillators an mixers, SAWF-driver, L.O.-output and tri-state band switch. Additional to TV-tuner application this IC is usable for DAB (Digital Audio Broadcast) tuners. Features D 9 V supply voltage D Frequency range from 48 to 860 MHz D Band A: balanced high impedance mixer input and amplitude controlled oscillator D Band B + C: balanced low impedance mixer input and symmetrical oscillator D Balanced L. O.-outputs for prescalers or PLL D SAW filter driver with low impedance output D Voltage regulator for stable operating characteristics D ESD protection on all pins except oscillator pins and RF-inputs Benefits D The integration of 3 bands and the small SSO28 package allows to design very small and economical 3-band tuners with high performance. Block Diagram 1 www.DataSheet4U.com 3 4 6 5 7 8 10 9 11 19 2 Osc. A Osc. B Osc. C Voltage stabiliser Band switch L.O. 12 27 28 Mixer output SAW–filter driver 17 18 14 RF Band A 25 24 23 Band B 22 26 21 Band C 95 10717 13 20 16 15 Figure 1. Block diagram TELEFUNKEN Semiconductors Rev. A2, 29-May-96 1 (8) U2309B Pin Description Osc A, base GND (common) Osc A, coll. Osc B, base Osc B, coll. Osc B, coll. Osc B, base Osc C, base Osc C, coll. 1 2 3 4 5 6 7 8 9 28 L.O. out 27 L.O. out 26 GND (RF) 25 RF in, A 24 RF in, A 23 RF in, B 22 RF in, B 21 RF in, C Pin 1 2 3 4, 7 5, 6 8, 11 9, 10 12 13,...