CY25811SC CYPRESS [Cypress Semiconductor], CY25811SC Datasheet

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CY25811SC

Manufacturer Part Number
CY25811SC
Description
Spread Spectrum Clock Generator
Manufacturer
CYPRESS [Cypress Semiconductor]
Datasheet

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Cypress Semiconductor Corporation
Document #: 38-07112 Rev. *E
Features
• 4- to 32-MHz input frequency range
• 4- to 128-MHz output frequency range
• Accepts clock, crystal, and resonator inputs
• 1x, 2x, and 4x frequency multiplication:
• Center and down spread modulation
• Low power dissipation:
• Low cycle-to cycle jitter:
• Available in 8-pin SOIC and TSSOP packages
• Commercial and industrial temperature ranges
Block Diagram
— CY25811: 1x; CY25812: 2x; CY25814: 4x
— 3.3V = 52 mW-typ @ 6MHz
— 3.3V = 60 mW-typ @ 12MHz
— 3.3V = 72 mW-typ @ 24MHz
— 8 MHz = 450 ps-max
— 16 MHz = 225 ps-max
— 32 MHz = 150 ps-max
XOUT
VDD
VSS
XIN
1
8
7
2
8pF
8pF
300K
FRSEL
6
MODULATION
REFERENCE
CONTROL
DECODER
DIVIDER
S1
LOGIC
INPUT
3
S0
4
3901 North First Street
COUNTE
PD and
VCO
CP
R
COUNTER
Spread Spectrum Clock Generator
MUX
and
VCO
LF
SSCLK
Applications
Benefits
• Printers and MFPs
• LCD panels
• Digital copiers
• PDAs
• CD-ROM, VCD, and DVD
• Networking, LAN/WAN
• Scanners
• Modems
• Embedded digital systems
• Peak EMI reduction by 8 to 16 dB
• Fast time to market
• Cost reduction
5
XIN/CLKIN
San Jose
VSS
Pin Configuration
S0
S1
8-pin SOIC/TSSOP
,
1
2
3
4
CA 95134
CY25811
CY25812
CY25814
Revised June 03, 2004
CY25811/12/14
8
7
6
5
XOUT
VDD
FRSEL
SSCLK
408-943-2600

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CY25811SC Summary of contents

Page 1

Features • 32-MHz input frequency range • 128-MHz output frequency range • Accepts clock, crystal, and resonator inputs • 1x, 2x, and 4x frequency multiplication: — CY25811: 1x; CY25812: 2x; CY25814: 4x • Center and down ...

Page 2

Pin Definitions Pin No. Name Type 1 Xin/CLK Crystal, ceramic resonator or clock input pin. 2 VSS Power supply ground Digital Spread% control pin. 3-Level input (H-M-L). Default = Digital Spread% control pin. 3-Level input ...

Page 3

Table 2. Spread% Selection (continued) XIN (MHz) FRSEL 20-24 M ±1.3 24-28 M ±1.2 28-32 M ±1.1 3-Level Digital Inputs S0, S1, and FRSEL digital inputs are designed to sense 3 different logic levels ...

Page 4

Table 4. Input and Output Frequency Selection Input Frequency Range (MHz Absolute Maximum ...

Page 5

AC Electrical Specifications Parameter Description F Input Frequency Range IN T Clock Rise Time R1 T Clock Fall Time F1 T Clock Rise Time R2 T Clock Fall Time F2 T Input Clock Duty Cycle DCIN T Output Clock Duty ...

Page 6

Characteristic Curves The following curves demonstrate the characteristic behavior of the CY25811/12/14 when tested over a number of environ- mental and application-specific parameters. These are typical performance curves and are not meant to replace any parameter specified in DC and ...

Page 7

SSCG Profiles CY25811/12/14 SSCG products use a non-linear “optimized” frequency profile as shown In Figure 3. The use of Cypress proprietary “optimized” frequency profile maintains flat energy distribution over the fundamental and higher order harmonics. This results in additional EMI ...

Page 8

... Application Schematic N/C Ordering Information Part Number CY25811SC 8-pin SOIC CY25811SCT 8-pin SOIC – Tape and Reel CY25811SI 8-pin SOIC CY25811SIT 8-pin SOIC – Tape and Reel CY25811ZC 8-pin TSSOP CY25811ZCT 8-pin TSSOP – Tape and Reel CY25812SC 8-pin SOIC CY25812SCT 8-pin SOIC – ...

Page 9

Ordering Information (continued) CY25811ZXC 8-pin TSSOP CY25811ZXCT 8-pin TSSOP – Tape and Reel CY25812SXC 8-pin SOIC CY25812SXCT 8-pin SOIC – Tape and Reel CY25812SXI 8-pin SOIC CY25812SXIT 8-pin SOIC – Tape and Reel CY25812ZXC 8-pin TSSOP CY25812ZXCT 8-pin TSSOP – ...

Page 10

Thin Shrunk Small Outline Package (4.40 MM Body) Z8 PIN 6.25[0.246] 6.50[0.256] 4.30[0.169] 4.50[0.177] 8 0.65[0.025] BSC. 0.19[0.007] 0.30[0.012] 0.85[0.033] 0.95[0.037] 0.05[0.002] 0.15[0.006] 2.90[0.114] 3.10[0.122] Intel and Pentium are registered trademarks of Intel Corporation. All product ...

Page 11

Document History Page Document Title: CY25811/12/14 Spread Spectrum Clock Generator Document Number: 38-07112 Issue Orig. of REV. ECN NO. Date Change ** 107516 06/14/02 NDP *A 108002 06/29/02 NDP *B 121578 01/29/03 RGL *C 125550 05/14/03 RGL *D 131941 12/24/03 ...

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