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PDF W48C20 Data sheet ( Hoja de datos )

Número de pieza W48C20
Descripción Audio Subsystem Clock Generator
Fabricantes Cypress Semiconductor 
Logotipo Cypress Semiconductor Logotipo



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No Preview Available ! W48C20 Hoja de datos, Descripción, Manual

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W48C20
Audio Subsystem Clock Generator
Features
• Two independent phase-locked loops
• Four independent output frequencies
• ±250 ps maximum cycle-to-cycle jitter
• 3 ns rise/fall time (20%-80% VDD).
• Options available for a wide range of applications
• Supports 3.3V and 5V operation
• Low power CMOS design available in:
— 8-pin SOIC (Small Outline Integrated Circuit)
Overview
The W48C20 is a general-purpose device that features two
phase-locked loops. Through the use of metal masks, the chip
can be tailored to a wide variety of applications.
The W48C20 has four clock outputs, each of which is
maskable to a different frequency. Because the chip offers four
outputs in eight pins, it is suited to applications that require
multiple frequencies and have space constraints.
Table 1. Product Selection Guide
Mask Pin 4 Pin 5 Pin 6 Pin 7 Application
-01A 16.9344 24.576 33.8688 14.318 Audio/Crystal
-08 33.8688 18.432 16.9344 27.00 DVD
-09 40.00 22.50 20.00 25.00 Hard Disk
Drives
Functional Block Diagram
XTAL
X1
X2
Crystal load capacitors
as needed
VCC
XTAL
OSC
PLL 1
GND
PLL 2
OUTPUT
OUTPUT
OUTPUT
OUTPUT
Pin Configuration
X1 1 8 X2
VCC 2 7 OUTPUT
GND 3 6 OUTPUT
OUTPUT 4 5 OUTPUT
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
December 20, 1999, rev. **

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