AV9170 Datasheet, PDF (1/11 Pages) Integrated Circuit Systems – Clock Synchronizer and Multiplier

Integrated
Circuit
Systems, Inc.
AV9170
Clock Synchronizer and Multiplier
General Description
The AV9170 generates an output clock which is synchronized
to a given continuous input clock with zero delay (±1ns at 5V
V_DD). Using ICS’s proprietary phase-locked loop (PLL) ana-
log CMOS technology, the AV9170 is useful for regenerating
clocks in high speed systems where skew is a major concern.
By the use of the two select pins, multiples or divisions of the
input clock can be generated with zero delay (see Tables 2 and
3). The standard versions produce two outputs, where CLK2
is always a divide by two version of CLK1.
The AV9170 is also useful to recover poor duty cycle clocks.
A 50 MHz signal with a 20/80% duty cycle, for example, can
be regenerated to the 48/52% typical of the part.
The AV9170 allows the user to control the PLL feedback,
making it possible, with an additional 74F240 octal buffer (or
other such device that offers controlled skew outputs), to
synchronize up to 8 output clocks with zero delay compared to
the input (see Figure 1). Application notes for the AV9170 are
available. Please consult ICS.
Features
• On-chip Phase-Locked Loop for clocks synchronization
• Synchronizes frequencies up to 107 MHz
(output) @ 5.0V
• ±1ns skew (max) between input & output clocks @ 5.0V
• Can recover poor duty cycle clocks
• CLK1 to CLK2 skew controlled to within ±1ns @ 5.0V
• 3.0 - 5.5V supply range
• Low power CMOS technology
• Small 8-pin DIP or SOIC package
• On chip loop filter
• AV9170-01, -04 for output clocks 20-107 MHz @ 5.0V,
20 - 66.7 MHz @ 3.3V
• AV9170-02, -05 for output clocks 5-26.75 MHz @ 5.0V,
5 - 16.7 MHz @ 3.3V
Block Diagram
AV 9170 Rev E 9/24/99
ICS reserves the right to make changes in the device data identified in this publication
without further notice. ICS advises its customers to obtain the latest version of all
device data to verify that any information being relied upon by the customer is current
and accurate.