IBM25PPC750FL-GR0133T IBM MICROELECTRONICS, IBM25PPC750FL-GR0133T Datasheet - Page 49

• Manufacturer Part Number: IBM25PPC750FL-GR0133T
• Description: MPU 750xx RISC 32-Bit 0.13um 600MHz 1.8V/2.5V/3.3V 750-Pin CBGA Tray
• Manufacturer: IBM MICROELECTRONICS

Specifications of IBM25PPC750FL-GR0133T

• Package: 750CBGA
• Device Core: PowerPC
• Family Name: 750xx
• Number Of Cpu Cores: 1
• Data Bus Width: 32 Bit
• Maximum Speed: 600 MHz
• I/o Voltage: 1.8|2.5|3.3 V
• Operating Temperature: -40 to 105 °C

Preliminary
5.4 Output Buffer dc Impedance
The 750FL 60x drivers were characterized over various process, voltage, and temperature conditions. To
measure Z
resistor is varied until the pad voltage is OV
The output impedance is actually the average of two resistances: the resistance of the pull-up and the resis-
tance of pull-down devices. When Data is held low, SW1 is closed (SW2 is open), and R
Pad = OV
closed (SW1 is open), and R
devices. With a properly designed driver R
Figure 5-6. Driver Impedance Measurement
750flds60.fm.6.0
April 27, 2007
DD
0
, an external resistor is connected to the chip pad, either to OV
/2. R
N
then becomes the resistance of the pull-down devices. When Data is held high, SW2 is
Data
P
is trimmed until Pad = OV
P
DD
and R
/2 (see Figure 5-6).
N
are close to each other in value, then Z
DD
/2. R
Pad
R
R
P
P
N
then becomes the resistance of the pull-up
OV
GND
PowerPC 750FL RISC Microprocessor
DD
DD
SW2
SW1
or GND. Then the value of such
System Design Information
N
is trimmed until
0
= (R
Page 49 of 65
P
+ R
N
)/2.