# CDCS502 Crystal Oscillator / Clock Generator

## FEATURES
️· Spread Spectrum Capable
️· Fundamental Mode Crystal Oscillator
️· Selectable Frequency Multiplication
️· Integrated Crystal Clocking Capacitors
️· SSC Controllable via 2 External Pins (±0%, ±0.5%, ±1%, ±2% Center Spread)
️· Frequency Multiplication Selectable (x1 or x4)
️· 3.3V Single Power Supply
️· -40°C to 85°C Operating Temperature
️· 8-Pin TSSOP Package

## DESCRIPTION
The CDCS502 is a crystal oscillator with optional spread spectrum capability. It features an advanced gain-controlled fundamental mode oscillator stage with a 10pF load capacitance, accepting crystals from 8MHz to 32MHz (ESR up to 180Ω). The device can operate in x1 mode (standard crystal oscillator) or with frequency multiplication (x4). It utilizes a PLL to spread the clock signal with triangular modulation.

## FUNCTION TABLE

FS	SSC_SEL 0	SSC_SEL 1	SSC Amount	fOUT / fIN	fOUT (at fIN = 27MHz)
0	0	0	±0.00%	1	27 MHz
0	0	1	±0.50%	1	27 MHz
0	1	0	±1.00%	1	27 MHz
0	1	1	±2.00%	1	27 MHz
1	0	0	±0.00%	4	108 MHz
1	0	1	±0.50%	4	108 MHz
1	1	0	±1.00%	4	108 MHz
1	1	1	±2.00%	4	108 MHz

## PIN FUNCTIONS
️· XIN: Crystal Input
️· XOUT: Crystal Output
️· OUT: LVCMOS Clock Output
️· SSC_SEL 0, 1: Spread Selection Pins (internal pull-up)
️· FS: Frequency Multiplication Selection (internal pull-up)
️· VDD: 3.3V Power Supply
️· GND: Ground

## PACKAGE
️· 8-Pin TSSOP

## ABSOLUTE MAXIMUM RATINGS
️· VDD: -0.5 to 4.6V
️· Operating Temperature: -65°C to 150°C
️· Junction Temperature: 125°C

## RECOMMENDATIONS
️· Crystal Frequency: 8 to 32 MHz
️· Load Capacitance: 10pF