AMD 8 APIC Pins AC and DC Characteristics, APIC Pin AC and DC Characteristics, Electrical Data

Preliminary Information

AMD Athlon™ XP Processor Model 8 Data Sheet 25175H— March 2003

Table 18. Guidelines for Platform Thermal Protection of the Processor

Symbol	Parameter Description	Max	Units	Notes
TSHUTDOWN	Thermal diode shutdown temperature for processor protection	125	°C	1, 2, 3
TSD_DELAY	Maximum allowed time from TSHUTDOWN 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 8 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 AMD Athlon™ Processor-Based Motherboard Design Guide, order# 24363, for thermal protection circuitry designs.

8.14APIC Pins AC and DC Characteristics

Table 19 shows the AMD Athlon XP processor model 8 AC and

DC characteristics of the APIC pins.

Table 19. APIC Pin AC and DC Characteristics

Symbol	Parameter Description	Condition	Min	Max	Units	Notes
VIH	Input High Voltage		1.7	2.625	V	1, 2
VIL	Input Low Voltage		–300	700	mV	1
VOH	Output High Voltage			2.625	V	2
VOL	Output Low Voltage		–300	400	mV
ILEAK_P	Tristate Leakage Pullup	VIN = VSS (Ground)	–1		mA
ILEAK_N	Tristate Leakage Pulldown	VIN = 2.5 V		1	mA
IOL	Output Low Current	VOL Max	9		mA
TRISE	Signal Rise Time		1.0	3.0	V/ns	3
TFALL	Signal Fall Time		1.0	3.0	V/ns	3
TSU	Setup Time		1		ns
THD	Hold Time		1		ns
CPIN	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.

44 Electrical Data Chapter 8