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參數(shù)資料
| 型號(hào)： | CDC922DLR |
| 英文描述： | CPU System Clock Generator |
| 中文描述： | CPU系統(tǒng)時(shí)鐘發(fā)生器 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 292K |
| 代理商： | CDC922DLR |
CDC922
133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS
WITH 3-STATE OUTPUTS
SCAS634 –JULY 28, 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Generates Clocks for Pentium
III Class
Microprocessors
Supports a Single Pentium III
Microprocessor
Uses a 14.318 MHz Crystal Input to
Generate Multiple Output Frequencies
Includes Spread Spectrum Clocking (SSC),
0.34% Downspread for Reduced EMI
Performance
Power Management Control Terminals
Low Output Skew and Jitter for Clock
Distribution
Operates from Dual 2.5-V and 3.3-V
Supplies
Generates the Following Clocks:
– 3 CPU (2.5 V, 100/133 MHz)
– 10 PCI (3.3 V, 33.3 MHz)
– 1 CPU/2 (2.5 V, 50/66 MHz)
– 1 APIC (2.5 V, 16.67 MHz)
– 3 3V66 (3.3 V, 66 MHz)
– 2 REF (3.3 V, 14.318 MHz)
– 1 48MHz (3.3 V, 48 MHz)
Packaged in 48-Pin SSOP Package
Designed for Use with TI’s Direct Rambus
Clock Generators (CDCR81, CDCR82,
CDCR83)
description
The CDC922 is a clock synthesizer/driver that generates CPU, CPU_DIV2, 3V66, PCI, APIC, 48MHz, and REF
system clock signals to support computer systems with a single Pentium III class microprocessor.
All output frequencies are generated from a 14.318-MHz crystal input. Instead of a crystal, a reference clock
input can be provided at the XIN input. Two phase-locked loops (PLLs) are used to generate the host
frequencies and the 48-MHz clock frequency. On-chip loop filters and internal feedback eliminate the need for
external components.
The host and PCI clock outputs provide low-skew and low-jitter clock signals for reliable clock operation. All
outputs have 3-state capability, which can be selected via control inputs SEL0, SEL1, and SEL133/100.
The 48MHz clock can be independently disabled via the control inputs SEL0, SEL1, and SEL133/100. In this
state, the 48-MHz PLL is disabled and the 48MHz clock is driven to high impedance to reduce component jitter.
The outputs are either 3.3-V or 2.5-V single-ended CMOS buffers. With a logic high-level on the PWR_DWN
terminal, the device operates normally, but when a logical low-level input is applied, the device powers down
completely with the outputs in a low-level output state.
Copyright
1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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REF0
REF1
V
DD
3.3V
XIN
XOUT
GND
PCI0
PCI1
V
DD
3.3V
PCI2
PCI3
PCI4
PCI5
GND
PCI6
PCI7
V
DD
3.3V
PCI8
PCI9
GND
3V66(0)
3V66(1)
3V66(2)
V
DD
3.3V
GND
V
DD
2.5V
APIC
GND
V
DD
2.5V
CPU_DIV2
GND
V
DD
2.5V
CPU2
GND
V
DD
2.5V
CPU1
CPU0
GND
V
DD
3.3V
GND
PWR_DWN
SPREAD
SEL1
SEL0
V
DD
3.3V
48MHz
GND
SEL133/100
DL PACKAGE
(TOP VIEW)
Intel and Pentium III are trademarks of Intel Corporation.
Direct Rambus and Rambus are trademarks of Rambus Inc.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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| CDD2061D | TRANSISTOR | BJT | NPN | 60V V(BR)CEO | 3A I(C) | TO-220AB |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CDC924 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DIRECT RAMBUSE CLOCK GENERATOR |
| CDC924DL | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 133MHz Clk Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CDC924DLG4 | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 133MHz Clk Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CDC924DLR | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 PC Motherboard 133- MHz Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CDC924DLRG4 | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 PC Motherboard 133- MHz Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
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