參數(shù)資料
型號： IBM25PPC750CXEJP5512T
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 533 MHz, RISC PROCESSOR, PBGA256
封裝： 27 X 27 MM, PLASTIC, BGA-256
文件頁數(shù)： 30/44頁
文件大?。?/td> 416K
代理商： IBM25PPC750CXEJP5512T
Data Sheet
PowerPC 750CXe RISC Microprocessor
Preliminary
System Design Information
Page 28 of 36
750cxe_DD3.1_Dev_3_gen_mkt.fm.1.5
April 8, 2004
6.4 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 OVDD. 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 VDD, OVDD, and GND pins of the PowerPC
750CXe.
6.5 Output Buffer DC Impedance
The PowerPC 750CXe 60x drivers were characterized over various process, voltage, and temperature
conditions. To measure Z0, an external resistor is connected to the chip pad, either to OVDD or GND. Then
the value of the resistor is varied until the pad voltage is OVDD/2; see Figure 6-2 below.
The output impedance is actually the average of two resistances: the resistance of the pull-up and the
resistance of pull-down devices. When Data is held low, SW2 is closed (SW1 is open), and RN is trimmed
until Pad = OVDD/2. RN then becomes the resistance of the pull-down devices. When Data is held high, SW1
is closed (SW2 is open), and RP is trimmed until Pad = OVDD/2. RP then becomes the resistance of the pull-
up devices. With a properly designed driver RP and RN are close to each other in value, then Z0 = (RP +
RN)/2.
Figure 6-2. Driver Impedance Measurement
Data
OV
DD
R
N
SW2
SW1
Pad
R
P
GND
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相關代理商/技術參數(shù)
參數(shù)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
IBM25PPC750FL-GR0124V 制造商:IBM 功能描述:MPU 750XX RISC 32BIT - Trays
IBM25PPC750FL-GR0133T 制造商:IBM 功能描述:IBMIBM25PPC750FL-GR0133T CSOI9SG LOGIC P
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