- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45249 > MC7447RX1267LB (MOTOROLA INC) 32-BIT, 1267 MHz, RISC PROCESSOR, CBGA360 PDF資料下載
參數(shù)資料
| 型號： | MC7447RX1267LB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 1267 MHz, RISC PROCESSOR, CBGA360 |
| 封裝： | 25 X 25 MM, 3.20 MM HEIGHT, 1.27 MM PITCH, CERAMIC, FLIP CHIP, BGA-360 |
| 文件頁數(shù)： | 47/87頁 |
| 文件大?。?/td> | 1586K |
| 代理商： | MC7447RX1267LB |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁當(dāng)前第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁
MOTOROLA
MPC7457 RISC Microprocessor Hardware Specifications
51
System Design Information
1.9.2
PLL Power Supply Filtering
The AVDD power signal is provided on the MPC7457 to provide power to the clock generation PLL. To
ensure stability of the internal clock, the power supplied to the AVDD input signal should be filtered of any
noise in the 500 kHz to 10 MHz resonant frequency range of the PLL. A circuit similar to the one shown in
Figure 22 using surface mount capacitors with minimum effective series inductance (ESL) is recommended.
The circuit should be placed as close as possible to the AVDD pin to minimize noise coupled from nearby
circuits. It is often possible to route directly from the capacitors to the AVDD pin, which is on the periphery
of the 360 CBGA footprint and very close to the periphery of the 483 CBGA footprint, without the
inductance of vias.
The PLL power supply filter previously provided in the MPC7457 RISC Microprocessor Hardware
Specifications has been found to be less effective for Rev 1.1 devices with the low core voltages described
in this specification. As a result, the recommended value for the resistor in the circuit is being evaluated and
a new recommendation is indicated in Figure 24. If the value indicated is not available, the nearest standard
value resistor may be used instead; a higher resistor value is recommended over a lower one. Motorola
continues to evaluate the filtering requirements of the MPC7457 and plans to make updated
recommendations as needed. Note that this recommendation applies to Rev. 1.1 devices only.
Figure 24. PLL Power Supply Filter Circuit
1.9.3
Decoupling Recommendations
Due to the MPC7457 dynamic power management feature, large address and data buses, and high operating
frequencies, the MPC7457 can generate transient power surges and high frequency noise in its power
supply, especially while driving large capacitive loads. This noise must be prevented from reaching other
components in the MPC7457 system, and the MPC7457 itself requires a clean, tightly regulated source of
power. Therefore, it is recommended that the system designer place at least one decoupling capacitor at each
VDD, OVDD, and GVDD pin of the MPC7457. It is also recommended that these decoupling capacitors
receive their power from separate VDD, OVDD/GVDD, and GND power planes in the PCB, utilizing short
traces to minimize inductance.
These capacitors should have a value of 0.01 or 0.1 F. Only ceramic surface mount technology (SMT)
capacitors should be used to minimize lead inductance, preferably 0508 or 0603 orientations where
connections are made along the length of the part. Consistent with the recommendations of Dr. Howard
Johnson in High Speed Digital Design: A Handbook of Black Magic (Prentice Hall, 1993) and contrary to
previous recommendations for decoupling Motorola microprocessors, multiple small capacitors of equal
value are recommended over using multiple values of capacitance.
In addition, it is recommended that there be several bulk storage capacitors distributed around the PCB,
feeding the VDD, GVDD, and OVDD planes, to enable quick recharging of the smaller chip capacitors. These
bulk capacitors should have a low equivalent series resistance (ESR) rating to ensure the quick response time
necessary. They should also be connected to the power and ground planes through two vias to minimize
inductance. Suggested bulk capacitors: 100–330 F (AVX TPS tantalum or Sanyo OSCON).
VDD
AVDD
400
2.2 F
GND
Low ESL Surface Mount Capacitors
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC7447RX1200LB | 32-BIT, 1200 MHz, RISC PROCESSOR, CBGA360 |
| MC7457VG1200LC | 32-BIT, 1200 MHz, RISC PROCESSOR, CBGA483 |
| MC7447RX867LB | 32-BIT, 867 MHz, RISC PROCESSOR, CBGA360 |
| MC7448VS1267NC | 32-BIT, 1267 MHz, RISC PROCESSOR, CBGA360 |
| MC7448VU1400NC | 32-BIT, 1400 MHz, RISC PROCESSOR, CBGA360 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC7447RX600NB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PPC7457RX1000NB |
| MC7447RX733NB | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC7447RX867NB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PPC7457RX1000NB |
| MC7448HX1000LC | 功能描述:IC MPU RISC 32BIT 360-FCCBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:MPC74xx 標(biāo)準(zhǔn)包裝:1 系列:MPC85xx 處理器類型:32-位 MPC85xx PowerQUICC III 特點:- 速度:1.2GHz 電壓:1.1V 安裝類型:表面貼裝 封裝/外殼:783-BBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:783-FCPBGA（29x29） 包裝:托盤 |
| MC7448HX1000LD | 功能描述:微處理器 - MPU APL8 RV2.2.1 1.15V 105C RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。