U4256BM Datasheet, PDF (11/14 Pages) TEMIC Semiconductors – Frequency Synthesizer for Radio Tuning

Oscillator Tuning Function Schematic
Cx1
U4256BM
Cx2
8p 32p 16p 8p 4p 2p 1p .5p
INV
.5p 1p 2p 4p 8p 16p 32p 8p
Figure 14.
B78
B79
B80
B81
B82
B83
B84
B85
Application Circuit
EN CLK DATA
V5
GND
C_{12 100 nF}
C₁
10 pF
FM
OSC
C₆
330 pF
C₈
47 pF
R₅
5.1 k Ω
C₉
33 pF
4 MHz
33 pF
20
19
18
17
16
15
14
13
12
11
R₂
600 Ω
U4256BM
1
2
3
4
5
6
7
8
9
10
R₄
10 kΩ
C₇
10 nF
C₁₆
C_{15 10 nF}
C₅
C_{4 100 nF}
C_{14 10 nF}
10 nF
100 µF
R₃
100 Ω
9611257
DAC1 DAC2 DAC3 VS SWO1 SWO2 SWO3 SWO4
8 ... 12 V
Figure 15. Application circuit
Rev. A2, 03-Nov-98
Preliminary Information
11 (14)