lmx1602tmx National Semiconductor Corporation, lmx1602tmx Datasheet - Page 13

• Manufacturer Part Number: lmx1602tmx
• Description: Pllatinum? Low Cost Dual Frequency Synthesizer
• Manufacturer: National Semiconductor Corporation

2.0 Programming Description
2.5.2 Typical Lock Detect Timing (AUX_PD_POL/MAIN_PD_POL = 1)
2.5.3 OSC Mode Programming
The OSC
TCXO). If the application uses an external reference frequency source, the current dissipation of the LMX1600/01/02 can be
reduced with the Logic Mode (0.5 mA typ.). Crystal Mode should be used when an external crystal resonator is used. Logic Mode
is used when an external reference frequency source is used. In Logic Mode, OSC
to ground for optimum performance.
When the FoLD output state is selected to CMOS high/low levels, the OSC Mode is forced to Crystal Mode.
2.5.4 Typical Crystal Oscillator Circuit
A typical implementation of a 10 MHz crystal oscillator with the OSC
out
AUX_R[17]
pin can be optimized for operating with an external crystal resonator or an external reference frequency source (i.e.
3
0
0
All Other States
AUX_R[16]
2
0
0
FoLD
(Continued)
AUX_R[15]
13
1
0
0
OUT
10012918
pin in Crystal Mode is shown below.
AUX_R[14]
OUT
should be connected to a 30 pF capacitor
0
0
1
0
1
Crystal Mode
Crystal Mode
Crystal Mode
10012917
Logic Mode
OSC
OUT
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