PLL BUILDING BLOCK
DATASHEET
ICS673-01
Description
The ICS673-01 is a low cost, high-performance Phase
Locked Loop (PLL) designed for clock synthesis and
synchronization. Included on the chip are the phase
detector, charge pump, Voltage Controlled Oscillator
(VCO), and two output buffers. One output buffer is a divide
by two of the other. Through the use of external reference
and VCO dividers (the ICS674-01), the user can customize
the clock to lock to a wide variety of input frequencies.
The ICS673-01 also has an output enable function that puts
both outputs into a high-impedance state. The chip also has
a power-down feature which turns off the entire device.
For applications that require low jitter or jitter attenuation,
see the MK2069.
Features
• Packaged in 16-pin SOIC
• Available in RoHS compliant package
• Access to VCO input and feedback paths of PLL
• Output operating range up to 120 MHz (5 V)
• Able to lock MHz range outputs to kHz range inputs
through the use of external dividers
• Output Enable tri-states outputs
• Low skew output clocks
• Power-down turns off chip
• VCO predivide to feedback divider of 1 or 4
• 25 mA output drive capability at TTL levels
• Advanced, low power, sub-micron CMOS process
• Single supply +3.3 V (±5%) or +5 V (±10%) operating
voltage
• Industrial and commercial temperature ranges
• Forms a complete PLL, using the ICS674-01
• For better jitter performance, use the MK1575
Block Diagram
Clock Input
REFIN
FBIN
PD
(entire chip)
CHCP VCOIN
VDD
2
VDD
Phase/
Frequency
Detector
Icp
UP
DOWN
VCO
2
Icp
1
MUX
40
3
CAP
GND
SEL
External Feedback Divider
(such as the ICS674-01)
2
OE (both
outputs)
CLK1
CLK2
IDT™ / ICS™ PLL BUILDING BLOCK
1
ICS673-01 REV Q 071906