CY28329 Datasheet, PDF (1/16 Pages) Cypress Semiconductor – 133-MHz Spread Spectrum Clock Synthesizer/Driver with Differential CPU Outputs

CY28329
133 MHz Spread Spectrum Clock Synthesizer/Driver
with Differential CPU Outputs
Features
Benefits
• Multiple output clocks at different frequencies
— Four pairs of differential CPU outputs, up to 133 MHz
— Ten synchronous PCI clocks, three free-running
— Six 3V66 clocks
— Two 48-MHz clocks
— One reference clock at 14.318 MHz
— One VCH clock
• Spread Spectrum clocking (down spread)
• Power-down features (PCI_STOP#, PD#)
• Three Select inputs (Mode select & IC Frequency
Select)
• OE and Test Mode support
• 56-pin SSOP package and 56-pin TSSOP package
• Motherboard clock generator
— Support Multiple CPUs and a chipset
— Support for PCI slots and chipset
— Supports AGP and Hub Link
— Supports USB host controller and graphic controller
— Supports ISA slots and I/O chip
• Enables reduction of EMI and overall system cost
• Enables ACPI compliant designs
• Supports up to four CPU clock frequencies
• Enables ATE and “bed of nails” testing
• Widely available, standard package enables lower cost
Logic Block Diagram
X1
XTAL
X2
OSC
PWR
PLL Ref Freq
Mult0
S1:2
VTTPWRGD#
Divider
PLL 1 _Network
PWR
Gate
PCI_STOP#
PD#
PWR
Stop
Clock
Control
/2
PWR
PWR
PLL 2
PWR
SDATA
SCLK
SMBus
Logic
VDD_REF
REF
VDD_CPU
CPU[0:3]
CPU[0:3]#
VDD_PCI
PCI_F[0:2]
PCI0:6
VDD_3V66
3V66_0
3V66_[2:]4/
66BUFF0:2
3V66_5/ 66IN
VDD_48MHz
USB (48MHz)
DOT (48MHz)
VCH_CLK/ 3V66_1
Pin Configurations
SSOP and TSSOP
Top View
VDD_REF 1
XTAL_IN 2
XTAL_OUT 3
56 ^REF
55 ^S1
54 CPU3
GND_REF 4
53 CPU3#
PCI_F0 5
PCI_F1 6
PCI_F2 ₇
VDD_PCI ₈
GND_PCI ₉
PCI0 ₁₀
PCI1 ₁₁
PCI2 ₁₂
PCI3 13
52 CPU0
51 CPU0#
50 VDD_CPU
49 CPU1
48 CPU1#
47 GND_CPU
46 VDD_CPU
45 CPU2
44 CPU2#
VDD_PCI 14
GND_PCI ¹⁵
PCI4 16
PCI5 ¹⁷
PCI6 18
VDD_3V66 ₁₉
GND_3V66 ₂₀
66BUFF0/3V66_2 ₂₁
66BUFF1/3V66_3 ₂₂
66BUFF2/3V66_4 23
66IN/3V66_5 ₂₄
PD# 25
VDD_CORE ₂₆
GND_CORE ₂₇
VTTPWRGD# ₂₈
43 MULT0
42 IREF
41 _{GND_IREF}
40 S2
39 USB
38 DOT
37 ^{VDD_ 48 MHz}
36 GND_ 48 MHz
35 _{3V66_1/VCH}
34 PCI_STOP#
33 3V66_0
32 VDD_3V66
31 GND_3V66
30 SCLK
29 ^SDATA
Rev 1.0, November 24, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:[phone] Fax:[phone]
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