ICS421-05
MDS 421-05 B 1 Revision 072304
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
DIGITAL VIDEO CAMERA CLOCK
Description
The ICS421-05 is a low-power, low-jitter clock
synthesizer developed for digital camera applications.
The device accepts a 27 MHz input clock to support
common digital video camera interface frequencies
including a 12 MHz for USB, 24.576 MHz for
IEEE1394, and a 72 MHz CCD clock. Power
consumption was minimized by lowering the voltage
requirement to 1.8 V minimum.
The ICS421-05 utilizes a small form factor 8-pin
TSSOP package.
ICS is a leader in low power, consumer application
clock sources. Devices are capable of supporting CCD,
video, audio, USB, CPU, and other peripherals.
Features
• Ultra-low operating voltage from 1.8 V to 2.4 V
• 10 mA supply current
• 27 MHz input clock frequency
• Fixed 24.576 MHz clock supports IEEE1394
• Fixed 12 MHz clock supports USB
• Fixed 72 MHz CCD clock
• Packaged in 8-pin TSSOP (Pb free)
Block Diagram
Clock
Buffer
CLKIN
27 MHz
Input Clock
IEEE
PLL
12M
24.576M
VDD
GND
CCD/
USB
PLL
72M
OE_USB
1
2