CY2030PVC-1 Cypress Semiconductor Corporation., CY2030PVC-1 Datasheet

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CY2030PVC-1

Manufacturer Part Number
CY2030PVC-1
Description
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

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Features
Cypress Semiconductor Corporation
USB, Audio, and I/O Clock Generator for Intel 82440LX Chipset
Logic Block Diagram
• USB, Audio, and I/O clock generator for most mother-
• Two copies of 48 MHz USB clocks
• One copy of 24 MHz I/O clock
• Audio support for 33.8688 MHz, 24.576 MHz, 16.9344
• Three copies of Ref. clock @ 14.318 MHz
• 14.318 MHz reference input
• Ability to three-state all outputs
• Test mode support
• Output duty cycle 45% min. to 55% max.
• Available in 20-pin SSOP packages
• 3.3V operation
• Internal pull-up resistors on S0, S1, and OE inputs
XTALOUT
boards using 5
be used for peripheral systems.
MHz and 12.288 MHz, pin-selectable
XTALIN
SEL0
SEL1
OE
14.318
OSC.
MHz
th
or 6
th
generation processors. Can also
(96 MHz)
ROM
Audio
SYS
PLL
PLL
2:1
2:1
3901 North First Street
/2
/2
/2
/2
Functional Description
The CY2030 is a peripheral clock generator for most mother-
boards using fifth and sixth generation processors. The device
outputs two copies of a 48 MHz USB clock, as well as one copy
of a 24 MHz I/O clock, both of which meet Intel’s accuracy,
drive, and jitter requirements. Additionally, the part drives two
audio clock outputs at 2X and 1X frequencies respectively.
These audio clocks support all frequencies that are required
by CODECs and FM synthesizers. Finally, the part outputs
three reference clocks at 14.318 MHz, which can be used to
drive ISA slots, graphics accelerators, and other devices re-
quiring this frequency.
The CY2030 can be used with the CY2275-1 and CY2276-1
(which are CPU, AGP, PCI, and SDRAM clock generators) to
provide a complete clock solution for PC motherboards.
The CY2030 accepts a 14.318 MHz reference signal as its
input. The CY2030 has two PLLs, one of which generates the
audio clocks, and the other generates the Universal Serial Bus
(USB) and I/O clocks. The CY2030 runs off a 3.3V supply.
REF0 (14.318 MHz)
REF1 (14.318 MHz)
REF2 (14.318 MHz)
USBCLK0 (48 MHz)
USBCLK1 (48 MHz)
IOCLK (24 MHz)
2XAUDIO
AUDIO
San Jose
January 10, 1997 - Revised July 1, 1997
XTALOUT
2XAUDIO
CA 95134
XTALIN
AUDIO
SEL0
SEL1
V
V
V
Pin Configuration
OE
DD
DD
SS
1
2
3
4
5
6
7
8
9
10
Top View
SSOP
20
19
18
17
16
15
14
13
12
11
408-943-2600
CY2030
REF2
REF1
V
REF0
V
USBCLK0
USBCLK1
V
IOCLK
V
DD
SS
DD
SS

Related parts for CY2030PVC-1

CY2030PVC-1 Summary of contents

Page 1

USB, Audio, and I/O Clock Generator for Intel 82440LX Chipset Features • USB, Audio, and I/O clock generator for most mother boards using generation processors. Can also be used for peripheral systems. • Two copies ...

Page 2

Pin Summary Name Pins Description V 1 3.3V voltage supply DD [1, 2] XTALIN 2 Reference crystal input, typically 14.318 MHz [1] XTALOUT 3 Reference crystal feedback V 4 Ground Output Enable, active HIGH (internal pull-up resistor ...

Page 3

Maximum Ratings (Above which the useful life may be impaired. For user guide- lines, not tested.) Supply Voltage..................................................–0.5 to +4.6V Input Voltage.............................................. –0. [4] Operating Conditions Parameter V Supply Voltage, 3. Operating Temperature, Ambient A C ...

Page 4

Switching Waveforms Duty Cycle Timing 1.5V 1.5V All Outputs Rise/Fall Time 2.0V OUTPUT 0. 1.5V V 2.0V DD 0.8V 0. CY2030 ...

Page 5

Applications Information Clock traces must be terminated with either series or parallel termination, as they are normally done. Additionally, the CY2030 does not have crystal load matching capacitors internal to the device, and therefore, external capacitors will be needed when ...

Page 6

... Test Circuit Note: All capacitors should be placed as close to each pin as possible. Ordering Information Package Ordering Code Name CY2030PVC-1 O20 20-Pin SSOP Document #: 38-00560 0 0 OUTPUTS C LOAD Operating Package Type Range Commercial 6 CY2030 0.1 F 0.1 F ...

Page 7

Package Diagram All Dimensions in mm. © Cypress Semiconductor Corporation, 1997. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress ...

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