LG F3000 - 26 Mhz Clock; FEM for Triband

3. TECHNICAL BRIEF
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3.2 26 MHz Clock (VCTCXO, X500)
The 26 MHz clock(X500) consists of a TCXO(Temperature Compensated Crystal Oscillator) which
oscillates at a frequency of 26 MHz. It is used within the SKY74400, analog base band chipset (U101,
AD6535), digital base band chipset (U102, AD6527B).
3.3 FEM for Triband (FL610)
(1608)
10KR510
0R746
2.2u
C528
3
OUT
4
VCC
1
VCONT
26MHz
X500
2
GND
C529
1000p
2V75_VVCXO
AFC
Figure 3-3 VCTCXO CIRCUIT DIAGRAM
Vc1 Vc2 Vc3 Current
EGSM-Tx 0.0-0.1V 0.0-0.1V 2.3-3.0V 10mA Max
EGSM-Rx 0.0-0.1V 0.0-0.1V 0.0-0.1V ≈ 0mA
DCS/PCS-Tx 0.0-0.1V 2.3-3.0V 0.0-0.1V 10mA Max
DCS-Rx 0.0-0.1V 0.0-0.1V 0.0-0.1V ≈ 0mA
PCS-Rx 2.3-3.0V 0.0-0.1V 0.0-0.1V 10mA Max
Table 3-1 FEM CONTROL LOGIC