| Number | Name | I/O | Description |
|---|---|---|---|
01 |
XIN |
I |
Reference crystal oscillator or external clock input with internally biased amplifier (any external input to XIN must be ac-coupled) |
02 |
XOUT |
O |
Reference crystal oscillator or external clock output |
03 |
VDD2 |
POWER |
Nominal 3.0 V supply voltage |
04 |
NC |
NC |
No connection |
05 |
DO |
O |
Single-ended charge pump output for passive low-pass filter. Goes to varicap D1 via R12 & R18 |
06 |
Vss |
GND |
Ground |
07 |
FIN |
I |
VCO frequency input with internally biased input amplifier (any external input to FIN must be ac-coupled) |
08 |
VDD1 |
I |
Nominal 1.0 V supply voltage |
09 |
NC |
NC |
No connection |
10 |
LD |
O |
Lock detector output (high when PLL is locked) |
11 |
CLK |
I |
Shift register clock input |
12 |
DATA |
I |
Serial data input |
13 |
LE |
I |
Latch enable input |
14 |
SW |
O |
Switchover terminal for constant of loop filter or a general open drain output |
15 |
TEST |
I |
Test mode control input with internal pull-down resistor |
16 |
BO |
O |
Terminal of reference crystal oscillator buffer output |
