U2309B Datasheet, PDF (1/8 Pages) TEMIC Semiconductors – VHF/ UHF-Tuner-IC

VHF/ UHF-Tuner-IC
U2309B
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
3
4 65 7
8 10 9 11
19 2
Osc. A
Osc. B
Osc. C
Voltage stabiliser
Band switch
12
L.O.
27
28
Mixer output
SAW–filter 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
95 10717
TELEFUNKEN Semiconductors
1 (8)
Rev. A2, 29-May-96