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W48C20 Datasheet

  • W48C20

  • Audio Subsystem Clock Generator

  • 96.46KB

  • 4頁(yè)

  • CYPRESS

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W48C20
Audio Subsystem Clock Generator
Features
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Two independent phase-locked loops
Four independent output frequencies
鹵250 ps maximum cycle-to-cycle jitter
3 ns rise/fall time (20%-80% V
DD
).
Options available for a wide range of applications
Supports 3.3V and 5V operation
Low power CMOS design available in:
鈥?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
-01A
-08
-09
Pin 4
Pin 5
Pin 6
Pin 7
27.00
25.00
Application
DVD
Hard Disk
Drives
16.9344 24.576 33.8688 14.318 Audio/Crystal
33.8688 18.432 16.9344
40.00
22.50
20.00
Functional Block Diagram
VCC
X1
XTAL
OSC
OUTPUT
OUTPUT
PLL 1
OUTPUT
Crystal load capacitors
as needed
XTAL
X2
PLL 2
OUTPUT
GND
Pin Configuration
X1
VCC
GND
OUTPUT
1
2
3
4
8
7
6
5
X2
OUTPUT
OUTPUT
OUTPUT
Cypress Semiconductor Corporation
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3901 North First Street
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San Jose
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CA 95134 鈥?/div>
408-943-2600
December 20, 1999, rev. **

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