cy24292 Cypress Semiconductor Corporation., cy24292 Datasheet

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cy24292

Manufacturer Part Number
cy24292
Description
Four Outputs Pci-express Clock Generator
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
cy24292LFXCT
Manufacturer:
CYPRESS/赛普拉斯
Quantity:
20 000
Features
Cypress Semiconductor Corporation
Document Number: 001-46142 Rev. *C
25 MHz Crystal or Clock Input
Four Differential 100 MHz PCI-Express Clocks
Supports HCSL or LVDS Compatible Output Levels
One Single-ended 25 MHz Output
Spread Spectrum Capability on all 100 MHz PCI-Express Clock
Outputs
SMBus Interface with Read Back Capability
32-pin QFN Package
Operating Voltage 3.3V
Commercial and Industrial Operating Temperature Range
Logic Block Diagram
XIN/EXCLKIN
PD_RESET#
(25 MHz)
SDATA
XOUT
SCLK
Clock Buffer/
Oscillator
Crystal
Four Outputs PCI-Express Clock Generator
198 Champion Court
Dividers, Buffers
Configuration
Synthesizer,
GND
PLL Clock
Logic
and
VDD
Functional Description
CY24292 is a clock generator device intended for PCI-Express
applications. The device includes: four 100 MHz differential
clocks with HCSL or LVDS compatible outputs for PCI-Express,
and one single-ended 25 MHz output.
Using a serially programmable SMBus interface, the CY24292
incorporates spread spectrum modulation on all four 100 MHz
outputs. The device incorporates a Lexmark Spread Spectrum
profile for maximum electromagnetic interference (EMI)
reduction. The spread feature or individual outputs can also be
disabled using the SMBus interface.
I
REF
R
REF
= 475 Ohms 1%
San Jose
,
CA 95134-1709
25M
PCIE0N
PCIE1N
PCIE2N
PCIE3N
PCIE0P
PCIE1P
PCIE2P
PCIE3P
(25 MHz)
Revised May 14, 2010
(100 MHz)
(100 MHz)
(100 MHz)
(100 MHz)
CY24292
408-943-2600
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cy24292 Summary of contents

Page 1

... Cypress Semiconductor Corporation Document Number: 001-46142 Rev. *C Four Outputs PCI-Express Clock Generator Functional Description CY24292 is a clock generator device intended for PCI-Express applications. The device includes: four 100 MHz differential clocks with HCSL or LVDS compatible outputs for PCI-Express, and one single-ended 25 MHz output. ...

Page 2

... Recommended Operation Conditions .............................11 DC Electrical Characteristics ...........................................11 AC Electrical Characteristics ...........................................12 Test and Measurement Setup ...........................................13 Single-ended Signals ................................................... 13 Differential Signals ....................................................... 13 Ordering Information .........................................................14 Package Dimensions .........................................................14 Document History Page ....................................................15 Sales, Solutions, and Legal Information .........................16 Worldwide Sales and Design Support.......................... 16 Products ....................................................................... 16 PSoC Solutions ............................................................ 16 CY24292 Page [+] Feedback ...

Page 3

... Pinout Figure 1. Pin Diagram - CY24292 32-Pin Device PCIE1P PCIE1N GND IREF PCIE2N PCIE2P GND VDD Table 1. Pin Definitions - CY24292 32-Pin Device Pin Number Pin Name Pin Type 1 PCIE1P Output 2 PCIE1N Output 3 GND Power 4 IREF Output 5 PCIE2N Output 6 PCIE2P Output 7 GND Power ...

Page 4

... Table 1. Pin Definitions - CY24292 32-Pin Device (continued) Pin Number Pin Name Pin Type 20 PD_RESET# Input 21 VDD Power 22 XIN/EXCLKIN Input 23 XOUT Output 24 VDD Power 25M Output 27 GND Power 28 VDD Power 29 GND Power 30 VDD Power 31 GND Power 32 VDD Power SMBus Serial Data Interface A two-signal serial interface is provided to enhance the flexibility and function of the clock synthesizer ...

Page 5

... Command code – 8 bits ‘1xxxxxxx’ stands for byte operation, of the command code represents the offset of the byte to be accessed 19 Acknowledge from slave 20 Repeat start 21:27 Slave address – 7 bits 28 Read = 1 29 Acknowledge from slave 30:37 Data byte from slave – 8 bits 38 Not acknowledge 39 Stop CY24292 Page [+] Feedback ...

Page 6

... MHz PCI-Express OE for 100 MHz PCI-Express output PCIE1 output PCIE1 100 MHz PCI-Express OE for 100 MHz PCI-Express output PCIE0 output PCIE0 Not applicable Not used Outputs Affected Not applicable Not used CY24292 Description Notes 1 = -0.5% down 1 = enabled 0 = disabled 1 = enabled Description Notes Description Notes ...

Page 7

... Not applicable Vendor ID bit 1 Not applicable Vendor ID bit 0 Outputs Affected Not applicable Not used 0 Disabled, Hi-Z. 25M has weak pull-down. 1 Disabled, Hi-Z. 25M has weak pull-down. 0 Disabled, Hi-Z. 25M has weak pull-down. 1 CY24292 Description Notes Description Notes All Clock Outputs Enabled Page [+] Feedback ...

Page 8

... Application Information Crystal Recommendations The CY24292 requires a parallel resonance crystal. Substituting a series resonance crystal causes the CY24292 to operate at the wrong frequency and violate the ppm specification. For most applications there is a 300 ppm frequency shift between the series and parallel crystals due to incorrect loading. ...

Page 9

... Decoupling Capacitors Decoupling capacitors of 0.01 µF must be connected between VDD and GND as close to the device as possible. Do not share ground vias between components. Route power from power source through the capacitor pad, and then into the CY24292 pin. Dimension or Value 0.5 max 0.2 max ...

Page 10

... Dimension or Value 0.5 max 0.2 max 0.2 max 100 150 33 49.9 [2] Dimension or Value 1 Figure 4. LVDS Device Routing CY24292 Unit inch inch inch Ω Ω Ω Ω Unit inch inch R P LVDS Device Input Page [+] Feedback ...

Page 11

... R = 49.9 Ω Ω 49.9 Ω 4mA OL = 6*I OH REF No load, PD_RESET# pin = 1 Full load, PD_RESET# pin = 1 PD_RESET# pin = 0 All input pins PD_RESET CY24292 Min Max Unit –0.5 4.6 V –0 –65 150 °C – 125 °C 2000 – V V-0 at 1/8 in. ...

Page 12

... See notes 5 and 13 Measured at V point CROSS See note 14 Measured at V point CROSS [14] See note 14 PD_RESET# going high to 99% of final frequency Measured from 90% of the applied power supply level CY24292 = 475 Ω REF Min Typ Max Unit – 25 – MHz – 0 – ...

Page 13

... Single-ended Signals Figure 5. Test Load Configuration for Single-ended Output Signal Differential Signals Figure 6. Test Load Configuration for Differential Output Signal PCIEP PCIEN Document Number: 001-46142 Rev. *C 453 Ohm CLoad 33 Ohm 33 Ohm 475 Ohm CY24292 50 Ohm CLoad 50 Ohm CLoad 50 Ohm Page [+] Feedback ...

Page 14

... QFN tape and reel Package Dimensions Document Number: 001-46142 Rev. *C Type Commercial, 0°C to 70°C Commercial, 0°C to 70°C Industrial, -40°C to 85°C Industrial, -40°C to 85°C Figure 7. 32-Pin QFN Package CY24292 Production Flow 001-42168 *D Page [+] Feedback ...

Page 15

... Document History Page Document Title: CY24292 Four Outputs PCI-Express Clock Generator Document Number: 001-46142 Rev. ECN No. Orig. of Change ** 2490167 PYG/DPF/AESA *A 2507681 DPF/AESA *B 2811340 CXQ *C 2901711 KVM Document Number: 001-46142 Rev. *C Submission Description of Change Date See ECN New Data Sheet. 05/23/2008 Changed pinout based on PCIE_Bonding_Rev G. ...

Page 16

... Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement. Document Number: 001-46142 Rev. *C All products and company names mentioned in this document may be the trademarks of their respective holders. cypress.com/go/plc Revised May 14, 2010 CY24292 PSoC Solutions psoc.cypress.com/solutions PSoC 1 | PSoC 3 ...

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