Product Summary

The FS8308 is a serial data input, phase-locked loop IC with programmable input and reference frequency dividers. When combined with a VCO, this IC becomes the core of a very low power frequency synthesizer well-suited for mobile communication applications, e.x. paging systems and family radio service (FRS). There are some features implemented in this IC, including an 18-bit programmable input frequency divider, a terminal for reference oscillator buffer output, as well as stand-by control through programming, and etc. Details are listed in the following. Applications are (1)Pager; (2)Family radio service (FRS); (3)Wireless communication system.

Parametrics

FS8308 absolute maximum ratings: (1)Supply voltage VDD1: VSS – 0.3 to VSS + 2.0 V; (2)Supply voltage VDD2: VSS – 0.3 to VSS + 6.0 V; (3)Input voltage range VFIN: VSS – 0.3 to VDD + 0.3 V; (4)Operating temperature range TPS: –30 to 60 oC; (5)Storage temperature range TSTG: –40 to 125 oC; (6)Soldering temperature range TSLD: 255 oC; (7)Soldering time range tSLD: 10 s.

Features

FS8308 features: (1)Up to 40 MHz external crystal oscillator reference frequency under normal condition; (2)Low current consumption (IDD,total typically 1.2 mA at fFIN = 500 MHz and VDD1 = 1.0 V); (3)With Schmitt trigger added for noise-immune programming input; (4)18-bit programmable input frequency divider (including a ÷ 64/65 prescaler)with divide ratio range from 4032 to 262143; (5)13-bit programmable reference frequency divider (including a ÷ 8 prescaler)with divide ratio range from 40 to 65528; (6)Optional lock detector output (LD, fR/2, fV/2); (7)Charge pump output for passive low-pass filter; (8)Wide tuning range of charge pump output for external VCO (VSS+0.5 to VDD2-0.5); (9)Switchover terminal for constant of loop filter or general open drain output; (10)Reference oscillator buffer output; (11)Programmable stand-by control; (12)TSSOP 16L package (0.65mm pitch).

Diagrams

FS8308 pin connection

Image Part No Mfg Description Data Sheet Download Pricing
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FS8308
FS8308
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Data Sheet
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Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
FS8308
FS8308
Other

Data Sheet
Negotiable