P1818/19/20/21/22
®
Pin Diagrams
1
2
3
4
8
7
6
5
X IN
V S S
X O U T
V D D
F R S
1
8
7
6
5
X IN
X O U T
V D D
P D #
2
3
4
V S S
S R S
S R S
M o d O u t
P 1 8 1 8 A /B /C /D
P 1 8 1 9 A /B /C /D
P 1 8 2 0 A /B /C /D
R E F
M o d O u t
R E F
P 1 8 2 1 A /B /C /D
1
8
7
6
5
1
2
3
4
8
X IN
X O U T
V D D
P D #
X IN
M R S
2
3
4
7
6
5
V S S
D _ C
V S S
V D D
S S O N #
S R 0
S R S
P 1 8 1 8 E /F /G /H
P 1 8 1 9 E /F /G /H
P 1 8 2 0 E /F /G /H
M o d O u t
R E F
M o d O u t
P 1 8 2 2 A
Block Diagram
VDD
D_C PD# MRS FRS SRS
PLL
Modulation
XIN
Crystal
Oscillator
Frequency
Divider
Output
Divider
Phase
Detector
Loop
Filter
XOUT
VCO
Feedback
Divider
ModOUT
REF
P1818/19/20/21/22 Block Diagram
VSS
March 2003
2 of 8
Low Power Mobile VGA EMI Reduction IC
Notice: The information in this document is subject to change without notice.
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
