- 您现在的位置：买卖IC网 > PDF目录67683 > IBM25PPC750CX-CP40-3T 32-BIT, 466 MHz, RISC PROCESSOR, PBGA256 PDF资料下载
参数资料
| 型号： | IBM25PPC750CX-CP40-3T |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 466 MHz, RISC PROCESSOR, PBGA256 |
| 封装： | PLASTIC, BGA-256 |
| 文件页数： | 25/43页 |
| 文件大小： | 509K |
| 代理商： | IBM25PPC750CX-CP40-3T |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页当前第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页
PowerPC 750CX RISC Microprocessor Datasheet
Jun 20, 2001
Version 1.2
Page 31
7.2
PLL Power Supply Filtering
The AV
DD power signal is provided on the PowerPC 750CX to provide power to the clock generation phase-locked loop.
To ensure stability of the internal clock, the power supplied to the AV
DD input signal should be ltered using a circuit
similar to the one shown in Figure 15. The circuit should be placed as close as possible to the AV
DD pin to ensure it lters
out as much noise as possible. The referenced ferrite bead, FB, shown in Figure 14 should supply an impedance of
approximately 30 ohms in the 100 MHz region.
7.3
Decoupling Recommendations
Due to the PowerPC 750CX’s feature large address and data buses, and high operating frequencies, the PowerPC 750CX
can generate transient power surges and high frequency noise in its power supply, especially while driving large capaci-
tive loads. This noise must be prevented from reaching other components in the PowerPC 750CX system, and the Pow-
erPC 750CX itself requires a clean, tightly regulated source of power.
Therefore, it is strongly recommended that the system designer place at least one decoupling capacitor with a low ESR
(effective series resistance) rating at each V
DD and OVDD pin of the PowerPC 750CX. It is also recommended that these
decoupling capacitors receive their power from separate V
DD, OVDD, and GND power planes in the PCB, utilizing short
traces to minimize inductance.
These capacitors should range in value from 220pF to 10uF to provide both high and low-frequency ltering, and should
be placed as close as possible to their associated V
DD or OVDD pins. Suggested values for the VDD pins: 220pF (ceramic
X7R), 0.01uF(ceramic X7R), and 0.1uF(ceramic X7R). Suggested values for the OV
DD pins: 0.01uF(ceramic X7R),
0.1uF(ceramic X7R), and 10
F (tantalum). Only SMT (surface-mount technology) capacitors should be used to mini-
mize lead inductance.
In addition, it is recommended that there be several bulk storage capacitors distributed around the PCB, feeding the V
DD
and OV
DD planes, to enable quick recharging of the smaller chip capacitors. These bulk capacitors should have a low ESR
(equivalent series resistance) 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: 100uF(AVX TPS tantalum) or 330uF(AVX TPS tantalum).
7.4
Connection Recommendations
To ensure reliable operation, it is highly recommended to connect unused inputs to an appropriate signal level. Unused
active low inputs should be tied to OV
DD. Unused active high inputs should be connected to GND. All NC (no-connect)
signals must remain unconnected.
Power and ground connections must be made to all external V
DD, OVDD, and GND pins of the PowerPC 750CX.
Figure 15. PLL Power Supply Filter Circuit
V
DD
AV
DD
2
10
F
0.1
F
GND
FB
相关PDF资料 |
PDF描述 |
|---|---|
| IBM25PPC750CXEFP10-3T | RISC PROCESSOR, PBGA256 |
| IBM25PPC750CXEJP7012T | 32-BIT, 600 MHz, RISC PROCESSOR, PBGA256 |
| IBM25PPC750CXEJP5523T | 32-BIT, 533 MHz, RISC PROCESSOR, PBGA256 |
| IBM25PPC750CXEJQ5012T | 32-BIT, 500 MHz, RISC PROCESSOR, PBGA256 |
| IBM25PPC750CXEJQ4012T | 32-BIT, 466 MHz, RISC PROCESSOR, PBGA256 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IBM25PPC750CXEJP2013T | 制造商:IBM Microelectronics 功能描述:MPU 750XX RISC 32BIT 0.18UM 400MHZ 1.8V/2.5V 256BGA - Trays 制造商:IBM 功能描述:IBM IBM25PPC750CXEJP2013T Co-Processors |
| IBM25PPC750CXEJP5512T | 制造商:IBM 功能描述: |
| IBM25PPC750CXEJP7012T | 制造商:IBM Microelectronics 功能描述:MPU 750XX RISC 32BIT 0.18UM 600MHZ 1.8V/2.5V 256BGA - Trays 制造商:IBM 功能描述:IBM IBM25PPC750CXEJP7012T Co-Processors |
| IBM25PPC750CXEJP7013T | 制造商:IBM 功能描述:IBMIBM25PPC750CXEJP7013T OEM EOL151207 |
| IBM25PPC750FL-GR0123V | 制造商:IBM 功能描述:MPU 750XX RISC 32BIT - Trays |
发布紧急采购，3分钟左右您将得到回复。