PI6C104 Ver la hoja de datos (PDF) - Pericom Semiconductor

Número de pieza

componentes Descripción

Lista de partido

PI6C104

Spread Spectrum Clock Synthesizer for Desktop Pentium II

Pericom Semiconductor 

PI6C104

111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222

Spread Spectrum Clock Synthesizer

for Desktop Pentium II

Features

• Up to 112 MHz operation

• Spread Spectrum Modulation for CPUCLK, and PCICLK

• Two copies of CPU clock with VDD of 2.5V ±5%

• Seven copies of PCI clock,

(synchronous with CPU clock) 3.3V

• One copy of Ref. clock @ 14.31818MHz (3.3VTTL)

• 48MHz USB Clock, 24MHz Super I/O clock

• I2C Serial Configuration Interface

• Low cost 14.31818MHz crystal oscillator input

• Power management control

• Isolated core VDD, VSS pins for noise reduction

• 28-pin SSOP (H) and SOIC package (S)

Description

The PI6C104 is a high-speed low-noise clock generator designed

to work with the PI6C18X family of clock buffer to meet all clock

needs for Desktop Intel Architecture platforms. CPU and chipset

clock frequencies from 66.6 MHz to 112 MHz are supported.

Split supplies of 3.3V and 2.5V are used. The 3.3V power supply

powers a portion of the I/O and the core. The 2.5V is used to power

the remaining outputs (CPU and APIC). 2.5V signaling follows

JEDEC standard 8-X. Power sequencing of the 3.3V and 2.5V

supplies is not required.

An asynchronous PD# signal may be used to orderly power down

(or up) the system during power on.

Block Diagram

Pin Configuration

VDDAPIC

XTAL_IN

XTAL_OUT

REF

OSC

VDDREF

SEL

S[0..2]

VDDCPU

PLL1

Div

VDDPCI0,1

SDATA

SCLOCK

I2C

APIC

REF1

2

CPUCLK[0:1]

6

PCICLK[1:6]

PCICLK_F

PLL2

VDDP2

PI4

MUX

48MHz

24MHz/REF

XTAL_IN 1

XTAL_OUT 2

VSS 3

PCICLK_F/S1 4

PCICLK1 5

PCICLK2 6

PCICLK3 7

PCICLK4 8

VDD 9

PCICLK5 10

PCICLK6/PD# 11

VDD 12

48M/MODE 13

24M/REF/S2 14

28-Pin

H, S

28 VSS

27 REF1/P14

26 VDD

25 VDD2

24 APIC

23 VDD2

22 CPUCLK0

21 CPUCLK1

20 VDD

19 VSS

18 SDATA

17 SCLK

16 S0

15 VSS

234

PS8164B 03/15/99

Share Link: