AMD-762 Advanced Micro Devices, AMD-762 Datasheet - Page 62

• Manufacturer Part Number: AMD-762
• Description: System Controller
• Manufacturer: Advanced Micro Devices

AMD-762™ System Controller Data Sheet
4.3.1
Table 12.
50
V
V
I
V
V
C
Notes:
IL
IH
IL
OH
OL
IN
Symbol
* This table contains preliminary information, which is subject to change.
1. Input leakage currents include hi-Z output leakage for all bi-directional buffers with three-state outputs.
2. Absolute maximum pin capacitance for a PCI input is 10 pF (except for CLK) with an exception granted to motherboard-only devices
up to 16 pF in order to accommodate PGA packaging. Generally, this means that components for expansion boards need to use
alternatives to ceramic PGA packaging— that is, PQFP, SGA, etc.
Input High Voltage
Input Low Voltage
Input Leakage Current
Output High Voltage
Output Low Voltage
Input Pin Capacitance
DC Characteristics for PCI I/ Os*
Voltage Sequencing Requirements
Parameter Description
The preferred sequence of volt ages in t he AMD-762 system
controller is from highest (5 VDC on the REF_5V pin) to the
lowest. To accommodate the Suspend to RAM feat ure, it is
expected that the AMD-762 system controller’s 2.5-VDC core
must be powered from the 5-VDC standby voltage from the
standard ATX power supply and therefore is powered up before
the 3.3 VDC, and the AMD-762 system controller can tolerate
this for up to one second.
It is also assumed that the VREF voltages are always powered
from the associated power supply voltage and will therefore lag
behind that voltage. For example, DDR_VREF is powered off
the 2.5 VDC (VDD_CORE), thus comes up after the 2.5 VDC.
The same should apply to AGP_VREF, Px_VREF, etc.
Preliminary Information
0 < V
I
I
OUT
OUT
Electrical Data
Condition
= –500 A
= 1500 A
IN
< V
CC
0.5 V
0.9 V
— 0.5
Min
CC
CC
V
0.3 V
0.1 V
CC
Max
10
+ 0.5
10
CC
CC
24416C—December 2001
Units
pF
V
V
V
V
A
Chapter 4
Notes
2
1