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TEMIC Semiconductors
TEMIC Semiconductors

U2305B Datasheet Preview

U2305B Datasheet

VHF/ UHF-Tuner-IC

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U2305B pdf
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)



TEMIC Semiconductors
TEMIC Semiconductors

U2305B Datasheet Preview

U2305B Datasheet

VHF/ UHF-Tuner-IC

No Preview Available !

U2305B pdf
U2305B
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, 10
12
13, 14
15, 16
17, 18
19
20, 21
22, 23
24, 25
26
27, 28
Symbol
Function
Osc A, base Oscillator band A, base
GND Ground, common
(common)
Osc A, coll. Oscillator band A, collector
Osc B, base Oscillator band B, bases
Osc B, coll. Oscillator band B, collectors
Osc C, base Oscillator band C, bases
Osc C, coll. Oscillator band C, collectors
Band sw. Tri-state band switch
SAWF, out SAW filter driver outputs
SAWF, inp. SAW filter driver inputs
Mix out Mixer outputs, open collec-
tor
VS Supply voltage Vs
RF in, C RF inputs, band C
RF in, B RF inputs, band B
RF in, A RF inputs, band A
GND (RF) Ground, RF part
L.O. out L.O.-outputs
Ordering Information
Extended Type Number
U2305B-AFSG3
Package
SSO28
Remarks
Taped and reeled
2 (8) TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 10-Sep-96


Part Number U2305B
Description VHF/ UHF-Tuner-IC
Maker TEMIC Semiconductors
Total Page 8 Pages
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