U2305B Datasheet | TEMIC Semiconductors

Description This tuner IC requires a power supply of 5 V and performs the function of three separate oscillators an mixers, SAWF-driver, L.O.-output and tri-state band switch. This tuner IC is decigned for high performance tuners for TV, VCR and PCs. Features D 5 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 .. 6 5 7 8 10 9 11 Osc. A Osc. B Osc. C Voltage Stabilizer Band-Switch 12 L.O. 27 28 Mixer-Output SAW-Driver 17 18 14 13 RF Band A 25 24 23 Band B 22 26 21 Band C 16 15 Figure 1. Block diagram TELEFUNKEN Semiconductors Rev. A1, 10-Sep-96 1 (8) Preliminary Information Pin Description Osc A, base GND (mon) 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, 14 15, 16 17, 18 19 20, 21 22, 23 24, 25 26 27, 28 Symbol Osc A, base GND (mon) Osc A, coll. Osc B, base Osc B, coll. Osc C, base Osc C, coll. Band sw. SAWF, out SAWF, inp. Mix out VS RF in, C RF in, B RF in, A GND (RF) L.O. out Function Oscillator band A, base Ground, mon Oscillator band A, collector Oscillator band B, bases Oscillator band B, collectors Oscillator band C, bases Oscillator band C, collectors Tri-state band switch SAW filter driver outputs SAW filter driver inputs Mixer outputs, open collector Supply voltage Vs RF inputs, band...