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FS8108 Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – Low Power Phase-Locked Loop IC | |||
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FS8108 Low Power Phase-Locked Loop IC
the wireless IC company
HiMARK Technology, Inc. reserves the right to change the product described in this datasheet. All information con-
tained in this datasheet is subject to change without prior notice. HiMARK Technology, Inc. assumes no responsibility
for the use of any circuits shown in this datasheet.
Description
The FS8108 is a serial data input, phase-locked loop IC with programmable input and ref-
erence frequency dividers. When combined with a VCO, the FS8108 becomes the core of
a very low power frequency synthesizer well-suited for mobile communication applica-
tions such as paging systems. The FS8108 includes an 18-bit programmable input fre-
quency divider and also implements a separate pin for stand-by control.
Features
 High maximum input operating frequency â 185 MHz at VDD1 = 1.0 V
 Up to 22 MHz internal crystal oscillator reference frequency at VDD1 = 1.0 V
 Extremely low current consumption (IDD,total typically 0.4 mA at fFIN = 90 MHz)
 18-bit programmable input frequency divider (including a ÷ 64/65 prescaler) with
divide ratio range from 4032 to 262143
 13-bit programmable reference frequency divider (including a ÷ 8 prescaler) with
divide ratio range from 40 to 65528
 Optional lock detector output
 Charge pump output for passive low-pass filter
 Quick-lock signal output for faster locking
 Separate pin for stand-by control
 TSSOP 16L package (0.65mm pitch)
Applications
 Pager
 Wireless communication system
Page 1
June 2001
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