REV. 0

ADM1020

–12–

8-Lead SOIC

(SO-8)

85

4

1

0.1968 (5.00)

0.1890 (4.80)

0.2440 (6.20)

0.2284 (5.80)

PIN 1

0.1574 (4.00)

0.1497 (3.80)

0.0500 (1.27)

BSC

0.0688 (1.75)

0.0532 (1.35)

SEATING

PLANE

0.0098 (0.25)

0.0040 (0.10)

0.0192 (0.49)

0.0138 (0.35)

0.0098 (0.25)

0.0075 (0.19)

0.0500 (1.27)

0.0160 (0.41)

8

0

0.0196 (0.50)

0.0099 (0.25)

45

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

BUILT-IN

SENSOR

PROCESSOR

HOST BUS

SECOND LEVEL

CACHE

HOST-TO-PCI

BRIDGE

MAIN MEMORY

(DRAM)

PCI BUS (3.3V OR 5V 30/33MHz)

PCI SLOTS

D–

D+

ADM1020

ALERT SCLK SDATA

CD ROM

HARD

DISK

BMI IDE

ULTRA DMA/33

8237 1AB

(PIIX4)

HARD

DISK

GPI [ I,O] (30+)

AUDIO

SERIAL PORT

PARALLEL PORT

FLOPPY DISK

CONTROLLER

INFRARED

SMBUS

KEYBOARD

BIOS

ISA/EIO BUS

(3.3V, 5V TOLERANT)

USB PORT 1

USB PORT 2

Figure 16. Typical System Using ADM1020

The SCLK, and SDATA pins of the ADM1020 can be inter-

faced directly to the SMBus of an I/O controller such as the

Intel PCI ISA IDE Xcelerator (PIIX4) chip type 82371AB.

Figure 16 shows how the ADM1020 might be integrated into a

system using this type of I/O controller.