TELEFUNKEN Semiconductors
U2300B
VHF/ UHF-Tuner-IC
Description
This tuner IC requires a power supply of 12 V and perf...
TELEFUNKEN Semiconductors
U2300B
VHF/ UHF-Tuner-IC
Description
This tuner IC requires a power supply of 12 V and performs the function of three separate oscillators and
mixers, SAWF-driver, L.O.-output and tri-state band switch. Applications are 12 V TV- and VCR-tuners.
Features
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.-output 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 allows to design economical 3-band tuners
Block Diagram
13
4 65 7
8 10 9 11
19 2
Osc. A
Osc. B
Osc. C
Voltage Stabiliser Band Switch L.O.
12
Mixer Output SAW–Driver
27 28
17 18
14
Band A
25 24
Rev. A1: 16.10.1995
Band B
RF Band C
23 22 26 21 20 Figure 1. Block diagram
16 15
13
95 10717
1 (8)
U2300B
TELEFUNKEN Semiconductors
Pin Description
Osc A, base 1 GND (common) 2
Osc A, coll. 3 Osc B, base 4 Osc B, coll. 5 Osc B, coll. 6 Osc B, base 7 Osc C, base 8 Osc C, coll. 9 Osc C, coll. 10 Osc C, base 11
Band sw. 12 SAWF, out 13 SAWF, out 14
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 20 RF in, C 19 VS 18 Mix out 17 Mix out 16 SAWF, inp. 15 SAWF, inp.
95 10886
Pin 1 2
3 4, 7 5, 6 8, 11 9, 1...