ICS9117-01

Features:

• Generates the 14.7456 MHz microcontroller, 40.320
   MHz datadump and 1.84320 UART clocks
• Less than ±80 ppm frequency variation including
   temperature, voltage, load and aging tolerances
• Single crystal reference minimizes crystal reliability
   and inventory issues
• 80 ps one sigma jitter maintains 16-bit performance
• Output rise/fall times less than 1.5 ns
• On-chip loop filter components
• 3.0 V - 5.5 V supply range
• 8-pin, 150-mil SOIC package


Application

• Specifically designed to support the high performance
   of fax/data modems


Pinout




Specifications

AVDD, VDD referenced to GND -----------------------------------------                      7V
Operating temperature under bias --------------------------------       0 ºC to +70 ºC
Storage temperature ------------------------------------------------    65 ºC to +150 ºC
Voltage on I/O pins referenced to GND ------------------GND - 0.5 V to VDD + 0.5 V
Power dissipation------------------------------------------------------               0.5 Watts

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device.  This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied.  Exposure to absolute maximum rating conditions for extended periods may affect product reliability.


Description

The ICS9117-01 is a low-cost, high-performance frequency generator designed to support fax/data modem systems.Datapump and UART clocks are synthesized from a microcontroller crystal using high-accuracy, low-jitter PLLs,meeting the frequency tolerance and -96dB signal-to-noise ratios required by 16-bit DSP modem systems. Fast output clock edge rates minimize board induced jitter.

Exact frequency multiplying ratios of the ICS9117-01 ensure better than ±80 ppm frequency accuracy using a standard AT crystal with external load capacitors (typically 33pF ±5% for an 18pF series load crystal).   Achieving ±80ppm over four years requires the crystal to have 20 ppm initial accuracy, ±20 ppm
temperature and ±5 ppm/year aging coefficients.