|
CY25818 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – SPREAD SPECTRUM CLOCK GENERATOR | |||
|
CY25818/19
Spread Spectrum Clock Generator
Features
⢠8- to 32-MHz input frequency range
⢠CY25818: 8â16 MHz
⢠CY25819: 16â32 MHz
⢠Separate modulated and unmodulated clocks
⢠Accepts clock, crystal, and resonator inputs
⢠Down spread modulation
⢠Power-down function
⢠Low-power dissipation
â CY25818 = 33 mW-typ @ 8 MHz
â CY25818 = 56 mW-typ @ 16 MHz
â CY25819 = 36 mW-typ @ 16 MHz
â CY25819 = 63 mW-typ @ 32 MHz
⢠Low cycle-to-cycle jitter
â SSCLK = 250 ps-typ
â REFOUT = 275 ps-typ
⢠Available in 8-pin (150-mil) SOIC package
Block Diagram
Applications
⢠Printers and MFPs
⢠LCD panels and notebook PCs
⢠Digital copiers
⢠PDAs
⢠Automotive
⢠CD-ROM, VCD, and DVD
⢠Networking and LAN/WAN
⢠Scanners
⢠Modems
⢠Embedded digital systems
Benefits
⢠Peak electromagnetic interference (EMI) reduction by
8â16 dB
⢠Fast time to market
⢠Cost reduction
Pin Configuration
300K
XIN/CLKIN 1
XOUT 8
VDD 7
VSS 2
REFERENCE
DIVIDER
PD and
CP
LF
MODULATION
CONTROL
VCO
COUNTER
VCO
INPUT
DECODER
36
S0 PD#
DIVIDER
and
MUX
4 SSCLK
5 REFCLK
XIN/CLKIN 1
8 XOUT
VSS 2 CY25818
CY25819
S0 3
7 VDD
6 PD#
SSCLK 4
5 REFCLK
8 Pin SOIC
8-pin SOIC
Cypress Semiconductor Corporation ⢠3901 North First Street ⢠San Jose ⢠CA 95134 ⢠408-943-2600
Document #: 38-07362 Rev. *A
Revised December 28, 2002
|
▷ |