Chapter 7
Electrical Data
41
24309E—March 2002
AMD Athlon™ XP Processor Model 6 Data Sheet
Preliminary Information
7.15
APIC Pins AC and DC Characteristics
Table 16 shows the AMD Athlon XP processor model 6 AC and
DC characteristics of the APIC pins.
Table 15. Guidelines for Platform Thermal Protection of the Processor
Symbol
Parameter Description
Max
Units
Notes
T
SHUTDOWN
Thermal diode shutdown temperature for processor protection
125
°
C
1, 2, 3
T
SD_DELAY
Maximum allowed time from T
SHUTDOWN
detection to processor shutdown
500
ms
1, 3
Notes:
1. The thermal diode is not 100% tested, it is specified by design and limited characterization.
2. The thermal diode is capable of responding to thermal events of 40°C/s or faster.
3. The AMD Athlon™ XP processor model 6 provides a thermal diode for measuring die temperature of the processor. The
processor relies on thermal circuitry on the motherboard to turn off the regulated core voltage to the processor in response to a
thermal shutdown event. Refer to
Thermal Diode Monitoring Circuits,
order# 25658, for thermal protection circuitry designs.
Table 16. APIC Pin AC and DC Characteristics
Symbol
Parameter Description
Condition
Min
Max
Units
Notes
V
IH
Input High Voltage
1.7
2.625
V
1, 2
V
IL
Input Low Voltage
–300
700
mV
1
V
OH
Output High Voltage
2.625
V
2
V
OL
Output Low Voltage
–300
400
mV
I
LEAK_P
Tristate Leakage Pullup
V
IN
= VSS (Ground)
–1
mA
I
LEAK_N
Tristate Leakage Pulldown
V
IN
= 2.5 V
1
mA
I
OL
Output Low Current
V
OL
Max
12
mA
T
RISE
Signal Rise Time
1.0
3.0
V/ns
3
T
FALL
Signal Fall Time
1.0
3.0
V/ns
3
C
PIN
Pin Capacitance
4
12
pF
Notes:
1. Characterized across DC supply voltage range.
2. The 2.625 V value is equal to 2.5 V plus a maximum of five percent.
3. Edge rates indicate the range for characterizing the inputs.