ML7406 Family LSIs Hardware Design Manual
FEXL7406DG-01
5
2.2. TCXO circuit [ML7406T]
Please use a TCXO that satisfy the following specification.
Output load:
10kΩ//10pF
Output level:
0.8Vpp to 1.5Vpp
Frequency accuracy:
below ±20ppm
The ML7406T has integrated bias circuit and the DC bias is applied to the TCXO (#6) pin. A 1000pF capacitor
should be placed on the TCXO line as following.
In ML7406T, #5 pins is N.C. pin, then it should be open.
Figure 2.2.1 External oscillator circuit (TCXO) configurations
2.3. SPXO circuit [ML7406S]
Please use a SPXO that satisfy the following specification.
Output load:
15pF
Output level:
CMOS Level (digital I/O input)
Frequency accuracy:
following application specification
No need coupling capacitor as following.
In ML7406S, #5 pins is N.C. pin, then it should be open.
Figure 2.3.1 External oscillator circuit (SPXO) configurations
TCXO
26MHz
1000pF
TCXO(#6)
VB
N.C.(#5)
SPXO
26MHz
SPXO(#6)
N.C.(#5)