AM79C974 datasheet(91/153 Pages) AMD

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P R E L I M I N A R Y

AMD

Am79C974

ABSOLUTE MAXIMUM RATINGS

Storage Temperature

–65

°C to +150°C

. . . . . . . . . . .

Ambient Temperature

Under Bias

–55

°C to +125°C

. . . . . . . . . . . . . . . . . . .

Supply Voltage to AVSS or VSSB or VSSBS or DVSS

(AVDD, VDD, VDDB, VDDBS, DVDD)

–0.3 V to +6.0 V

. . .

Stresses above those listed under Absolute Maximum Rat-

ings may cause permanent device failure. Functionality at or

above these limits is not implied. Exposure to absolute maxi-

mum ratings for extended periods may affect device reliability.

OPERATING RANGES

Temperature (TA)0

°C to +70°C

. . . . . . . . . . . . . . . . .

Supply Voltages

(AVDD, VDD, VDDB, VDDBS, DVDD)

+5 V

± 5%

. . . . . . . . .

All Inputs within the Range:

AVSS – 0.5 V

≤ VIN ≤ AVDD + 0.5 V,

or VSS – 0.5 V

≤ VIN ≤ VDD + 0.5 V,

or VSSB – 0.5 V

≤ VIN ≤ VDDB + 0.5 V

or VSSBS – 0.5 V

≤ VIN ≤ VDDBS + 0.5 V

or DVSS – 0.5 V

≤ VIN ≤ DVDD + 0.5 V

Operating ranges define those limits between which the func-

tionality of the device is guaranteed.

DC CHARACTERISTICS over COMMERCIAL operating range unless otherwise specified

PCI and Board Interface

Parameter

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

Digital Input Voltage

VIL

Input LOW Voltage

0.8

VIH

Input HIGH Voltage

2.0

Digital Output Voltage

VOL

Output LOW Voltage

IOL1 = 3 mA

0.55

IOL2 = 6 mA

IOL3 = 12 mA

0.4

(Note 1)

VOH

Output HIGH Voltage (Note 2)

IOH = –2 mA (Note 5)

2.4

Digital Input Leakage Current

IIL

Input Low Leakage Current (Note 3)

VIN = 0

–10

µA

IIH

Input High Leakage Current (Note 3)

VIN = VDD, VDDB

–10

+10

µA

Digital Output Leakage Current

IOZL

Output Low Leakage Current (Note 4)

VOUT = 0.4 V

–10

+10

µA

IOZH

Output High Leakage Current (Note 4)

VOUT = VDD, VDDB

–10

+10

µA

Crystal Input Current

VILX

XTAL1 Input LOW Voltage Threshold

VIN = External Clock

–0.5

0.8

VIHX

XTAL1 Input HIGH Voltage Threshold

VIN = External Clock

VDD – 0.8 VDD + 0.5

IILX

XTAL1 Input LOW Current

VIN = External Clock

Active

–120

µA

VIN = VSS

Sleep

–10

+10

µA

IIHX

XTAL1 Input HIGH Current

VIN = External Clock

Active

120

µA

VIN = VDD

Sleep

400

µA

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