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TEMIC Semiconductors - VHF/ UHF-Tuner-IC

Numéro de référence U2305B
Description VHF/ UHF-Tuner-IC
Fabricant TEMIC Semiconductors 
Logo TEMIC Semiconductors 





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U2305B fiche technique
VHF/ UHF-Tuner-IC
U2305B
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
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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
13
4 657
8 10 9 11
Osc. A
Osc. B
Osc. C
19 2
Voltage-
Stabilizer
Band-Switch
12
L.O. 27
28
Mixer-Output
SAW-Driver
17
18
14
Band A
25 24
RF
Band B
Band C
23 22 26 21 20
Figure 1. Block diagram
16 15
13
12504
TELEFUNKEN Semiconductors
Rev. A1, 10-Sep-96
Preliminary Information
1 (8)

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