ICS90C65

Features: · Specified for dual voltage operation (VDD=3.3V or 5V), but operates continuously from 3.0V to 5.25V· Designed to be powered-down for extended battery life· Backward compatibility to the ICS90C64 and ICS90C63· Dual Clock generator for the IBM-compatible Western Digital Imaging Video Gra...

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ICS90C65 Picture
SeekIC No. : 004371108 Detail

ICS90C65: Features: · Specified for dual voltage operation (VDD=3.3V or 5V), but operates continuously from 3.0V to 5.25V· Designed to be powered-down for extended battery life· Backward compatibility to the ...

floor Price/Ceiling Price

Part Number:
ICS90C65
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/4/22

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Product Details

Description



Features:

· Specified for dual voltage operation (VDD=3.3V or 5V), but operates continuously from 3.0V to 5.25V
· Designed to be powered-down for extended battery life
· Backward compatibility to the ICS90C64 and ICS90C63
· Dual Clock generator for the IBM-compatible Western Digital Imaging Video Graphics Array (VGA) LSI devices, and 8514/A chip sets
· Integral loop filter components, reduce cost and phase jitter
· Generates fifteen video clock frequencies (including 25.175 and 28.322 MHz) derived from a 14.318 MHz system clock reference frequency
· On-chip generation of eight memory clock frequencies
· Video clock is selectable among the 15 internally generated
clocks and one external clock
· CMOS technology
· Available in 20-pin PLCC, SOIC and DIP packages



Pinout

  Connection Diagram


Specifications

Ambient Temperature
under bias
0°C to 70°C
Storage temperature -40°C to 125°C
Voltage on all inputs and
outputs with respect to VSS
0.3 to 7 volts

Note: 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 Integrated Circuit Systems Video Graphics Array Clock Generator (ICS90C65) is capable of producing different output frequencies under firmware control. The video output frequency is derived from a 14.318 MHz system clock available in IBM PC/XT/AT and Personal System/2 computers. It is designed to work with Western Digital Imaging Video Graphics Array and 8514/A devices to optimize video subsystem performance.

The video dot clock output may be one of 15 internallygenerated frequencies or one external input. The selection of the video dot clock frequency is done through four inputs.
· VSEL0
· VSEL1
· VSEL2
· VSEL3

VSEL0 and VSEL1 of the ICS90C65 are latched by the SELEN signal. VSEL2 and VSEL3 are used as direct inputs to the VCLK selection. Table 1-1 is the truth table for VCLK selection.

The input and truth table have been designed to allow a direct connection to one of the many Western Digital Imaging VGA controllers or 8514/A chip sets.

The MCLK output is one of eight internally-generated frequencies as shown in Table 1-2. The various VCLK and MCLK frequencies are derived from the 14.318 MHz input frequency.

The VCLKE and MCLKE input of the ICS90C65 can tristate the VCLK and MCLK outputs to facilitate board level testing.




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