SPREAD SPECTRUM CLOCK GENERATOR
DATASHEET
ICS7152
Description
The ICS7152-01, -02, -11, and -12 are clock generators for
EMI (Electro Magnetic Interference) reduction (see below
for frequency ranges and multiplier ratios). Spectral peaks
can be attenuated by slightly modulating the oscillation
frequency. Both down and center spread profiles are
selectable. Center spread maintains an average frequency
equal to an unspread clock. Down spread meets maximum
frequency specs over the entire modualtion cycle.
Features
• Operating voltage of 3.3 V ±0.3 V
• Packaged in 8-pin SOIC
• Input frequency range of 16.6 to 134.0 MHz
• Output frequency range of 16.6 to 134.0 MHz
• Provides a spread spectrum clock output (±0.5%, ±1.5%
center spread; -1.0%, -3.0% down spread)
• Advanced, low-power CMOS process
• Industrial temperature range available
• Pb (lead) free package, RoHS compliant
Block Diagram
VDD
SEL
FREQ
XENS
XIN
XOUT
Clock Buffer/
Crystal
Ocsillator
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
CKOUT
External caps required with crystal for
accurate tuning of the clock
GND
Product Lineup
Product
ICS7152M-01, ICS7152MI-01
ICS7152M-02, ICS7152MI-02
ICS7152M-11, ICS7152MI-11
ICS7152M-12, ICS7152MI-12
Input Frequency Range
16.6 MHz to 67 MHz
40.0 MHz to 134.0 MHz
16.6 MHz to 67.0 MHz
40.0 MHz to 134.0 MHz
Modulation Type Modulation Enable Pin
Down spread
Center spread
Yes
IDT® SPREAD SPECTRUM CLOCK GENERATOR
1
ICS7152
REV K 062911
