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參數資料
| 型號： | MPC9855 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Clock Generator for PowerQUICC and PowerPC Microprocessors |
| 中文描述： | 微處理器時鐘發生器為PowerQUICC和PowerPC |
| 文件頁數： | 1/12頁 |
| 文件大小： | 267K |
| 代理商： | MPC9855 |
MPC9855
Rev 2, 1/2005
Freescale Semiconductor
Technical Data
Freescale Semiconductor, Inc., 2005. All rights reserved.
Preliminary Information
Clock Generator for PowerQUICC
and PowerPC Microprocessors
The MPC9855 is a PLL based clock generator specifically designed for
Freescale Microprocessor and Microcontroller applications including the
PowerPC and PowerQUICC. This device generates a microprocessor input
clock. The microprocessor clock is selectable in output frequency to any of the
commonly used microprocessor input and bus frequencies. The device offers
eight low skew clock outputs in two banks, each configurable to support different
clock frequencies. The extended temperature range of the MPC9855 supports
telecommunication and networking requirements.
Features
8 LVCMOS outputs for processor and other circuitry
Crystal oscillator or external reference input
25 or 33 MHz Input reference frequency
Selectable output frequencies include = 200, 166, 133,125, 111, 100, 83, 66,
50, 33, or 16 MHz
Buffered reference clock output (2 copies)
Low cycle-to-cycle and period jitter
100-lead PBGA package
100-lead Pb-free Package Available
3.3 V supply with 3.3 V or 2.5 V LVCMOS output supplies
Supports computing, networking, telecommunications applications
Ambient temperature range –40°C to +85°C
100-lead PBGA package
100-lead Pb-free Package Available
Functional Description
The MPC9855 uses either a 25 or 33 MHz reference frequency to generate 8 LVCMOS output clocks, of which, the frequency
is selectable from 16 MHz to 200 MHz. The reference is applied to the input of a PLL and multiplied to 2 GHz. Output dividers,
divide this frequency by 10, 12, 15, 16, 18, 20, 24, 30, 40, 60, or 120 to produce output frequencies of 200, 166, 133, 125, 111,
100, 83, 66, 50, 33, or 16 MHz. The single-ended LVCMOS outputs provide 8 low skew outputs for use in driving a microprocessor
or microcontroller clock input as well as other system components. The input reference, either crystal or external input is also
buffered to a separate dual outputs that my be used as the clock source for a Ethernet PHY if desired.
The reference clock may be provided by either an external clock input of 25 or 33 MHz. An internal oscillator requiring a 25
MHz crystal for frequency control may also be used. The external clock source my be applied to either of two clock inputs and
selected via the CLK_SEL control input. Both single ended LVCMOS and differential LVPECL inputs are available. The crystal
oscillator or external clock input is selected via the input pin of XTAL_SEL. Other than the crystal, no external components are
required for crystal oscillator operation. The REF_33 MHz configuration pin is used to select between a 33 and 25 MHz input
frequency.
The MPC9855 is packaged in a 100 lead MAPBGA package to optimize both performance and board density.
ORDERING INFORMATION
Device
Temp. Range
Case No.
Package
MPC9855
–40°C to +85°C
1462-01
100 lead MAPBGA
MPC9855
MICROPROCESSOR
CLOCK GENERATOR
VF SUFFIX
VM SUFFIX (Pb-FREE)
100 MAPBGA PACKAGE
CASE 1462-01
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MPC9855VM | 功能描述:時鐘發生器及支持產品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MPC9855VMR2 | 功能描述:時鐘發生器及支持產品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MPC9865VM | 功能描述:時鐘發生器及支持產品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MPC9865VMR2 | 功能描述:時鐘發生器及支持產品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MPC9893 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Low Voltage PLL Intelligent Dynamic Clock (IDCS) Switch |
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