CY25811_07 CYPRESS [Cypress Semiconductor], CY25811_07 Datasheet

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CY25811_07

Manufacturer Part Number
CY25811_07
Description
Spread Spectrum Clock Generator
Manufacturer
CYPRESS [Cypress Semiconductor]
Datasheet
Features
Cypress Semiconductor Corporation
Document Number: 38-07112 Rev. *F
Logic Block Diagram
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
CY25811: 1x; CY25812: 2x; CY25814: 4x
3.3V = 52 mW-typ at 6 MHz
3.3V = 60 mW-typ at12 MHz
3.3V = 72 mW-typ at 24 MHz
8 MHz = 480 ps-max
16 MHz = 400 ps-max
32 MHz = 450 ps-max
XOUT
VDD
VSS
XIN
1
8
7
2
8pF
8pF
300K
198 Champion Court
FRSEL
6
MODULATION
Spread Spectrum Clock Generator
REFERENCE
CONTROL
DECODER
DIVIDER
S1
LOGIC
INPUT
3
S0
Applications
Benefits
4
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
COUNTE
PD and
San Jose
VCO
CP
R
COUNTER
MUX
and
VCO
,
LF
CA 95134-1709
SSCLK
5
Revised September 21, 2007
CY25811/12/14
408-943-2600
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CY25811_07 Summary of contents

Page 1

Features ■ 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 ...

Page 2

Pinouts Table 1. Pin Definition - 8 Pin SOIC/TSSOP 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 = M. 4 ...

Page 3

Spread% Selection The CY25811/12/14 SSCG products provide Center-Spread, Down-Spread and No-Spread functions. The amount of Spread% is selected by using 3-Level. S0 and S1 digital inputs and Spread% values are given in Table 3. Spread% Selection XIN ...

Page 4

Input and Output Frequency Selection The relationship between input frequency versus output frequency in terms of device selection and FRSEL setting is given in As shown, the input frequency range is selected by FRSEL and is the same for CY25811, ...

Page 5

Absolute Maximum Conditions Parameter Description V Supply Voltage DD V Input Voltage IN T Temperature, Storage S T Temperature, Operating Ambient A1 T Temperature, Operating Ambient A2 T Temperature, Junction J ESD ESD Protection (Human Body Model) MIL-STD-883, Method 3015 ...

Page 6

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 7

AC Electrical Specifications Parameter Description T Cycle-to-Cycle Jitter, Spread on CCJ2 T Cycle-to-Cycle Jitter, Spread on CCJ3 T PLL Lock Time SU Characteristic Curves The following curves demonstrate the characteristic behavior of the CY25811/12/14 when tested over a number of ...

Page 8

SSCG Profiles CY25811/12/14 SSCG products use a non-linear “optimized” frequency profile as shown In “optimized” frequency profile maintains flat energy distribution over the fundamental and higher order harmonics. This results in additional EMI reduction in electronic systems. Figure 4. Spread ...

Page 9

Application Schematic MHz N/C Document Number: 38-07112 Rev 0 VDD 1 XIN 5 SSCLK Y1 8 XOUT CY25811 CY25812 CY25814 FRSEL 4 S0 VSS 2 CY25811/12/14 ...

Page 10

Ordering Information Part Number CY25811SCT 8-pin SOIC – Tape and Reel CY25811SI 8-pin SOIC CY25811SIT 8-pin SOIC – Tape and Reel CY25812SC 8-pin SOIC CY25812SCT 8-pin SOIC – Tape and Reel CY25812ZC 8-pin TSSOP CY25812ZCT 8-pin TSSOP – Tape and ...

Page 11

Package Drawing and Dimensions 0.189[4.800] 0.196[4.978] 0.050[1.270] BSC 0.0138[0.350] 0.0192[0.487] Figure 6. 8-Pb 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] ...

Page 12

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 Converted from IMI to Cypress *A 108002 06/29/02 NDP Deleted Junction Temp. in Absolute Maximum ...

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