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Part Number: AV9155

 

 

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Description: The AV9155 is a low cost frequency generator designed specifically for desktop and notebook PC applications. Its CPU cl...


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AV9155 General Description


The AV9155 is a low cost frequency generator designed specifically for desktop and notebook PC applications. Its CPU clocks provide all necessary CPU frequencies for 286, 386 and 486 systems, including support for the latest speeds of processors. The device uses a 14.318 MHz crystal to generate the CPU and all peripheral clocks for integrated desktop motherboards.

The dual 14.318 MHz clock outputs allows one output for the system and one to be the input to an ICS graphics frequency generator such as the AV9194.

The CPU clock offers the unique feature of smooth, glitch-free transitions from one frequency to the next, making this ideal device to use whenever slowing the CPU speed. The AV9155 makes a gradual transition between frequencies, so that it obeys the Intel cycle-to-cycle timing specification for 486 systems. The simultaneous 2X and 1X CPU clocks offer controlled skew to within 1.5ns (max) of each other.

ICS offers several versions of the AV9155. The different devices are shown below:ICS has been shipping motherboard frequency generators since April 1990, and is the leader in the area of multiple output clocks on a single chip. The AV9155 is a third generation device, and uses ICS’s patented analog CMOS phase-locked loop technology for low phase jitter. ICS offers a broad family of frequency generators for motherboards, graphics and other applications, including cost-effective versions with only one or two output clocks. Consult ICS for all of your clock generation needs.

AV9155 Maximum Ratings

VDD referenced to GND . . . . . . . . . . . . . . . . . . . . . . 7V
Voltage on I/O pins referenced to GND. . . . . . . . . . .GND -0.5V to VDD +0.5V
Operating temperature under bias. . . . . . . . . . . . . . 0°C to +70°C
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 Watts
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +150°C

AV9155 Features

Compatible with 286, 386, and 486 CPUs
 Supports turbo modes
Generates communications clock, keyboard clock,
   floppy disk clock, system reference clock, bus clock
   and CPU
Output enable tristates outputs
 Up to 100 MHz at 5V or 3.3V
 20-pin DIP or SOIC
 All loop filter components internal
 Skew-controlled 2X and 1X CPU clocks
 Power-down option

AV9155 Connection Diagram

AV9155  Connection Diagram

AV9155 datasheet

AV9155
PDF/DataSheet Download

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AV9155 Relative Products

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    The AV9154A-60 is a low cost frequency generator designed for general purpose PC and disk drive applications. Its CPU clocks provide all necessary frequencies for 286, 386 and 486 systems, including support for the latest speeds of processors. The standard d...

  • AV9154A-39

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    The ICS9154A-39 is a 0.8mm technology low-cost frequency generator designed for general purpose PC and disk drive applications. However, because the ICS9154A-39 uses 0.8mm technology and the latest phase-locked loop architecture, it offers significant perfor...

  • AV9154A

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    .The AV9154A is a 0.8mm version of the industry leading AV9154. Like the AV9154, the AV9154A is a low-cost frequency generator designed for general purpose PC and disk drive applications. However, because the AV9154A uses 0.8mm technology and the latest phas...

  • AV9110

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    The AV9110 generates user specified clock frequencies using an externally generated input reference, such as 14.318 MHz or 10.00 MHz crystal connected between pins 1 and 14. Alternately, a TTL input reference clock signal can be used. The output frequency is...

  • AV9108

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    The AV9108 offers a tiny footprint solution for generating two simultaneous clocks. One clock, the REFCLK, is a fixed output frequency which is the same as the input reference crystal (or clock). The other clock, CLK1, can vary between 2 and 120 MHz, with up...

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