ADM1026

http://onsemi.com

3

Table 1. ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

6.5

V

+20

V

−20

V

Voltage on Analog Pins

V

Voltage on Open-drain Digital Pins

−0.3 to +6.5

V

Input Current at Any Pin

5

mA

Package Input Current

20

mA

150

C

Storage Temperature Range

−65 to +150

C

Lead Temperature, Soldering

Vapor Phase (60 sec)

Infrared (15 sec)

215

200

C

ESD Rating

All Other Pins

1000

2000

V

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.

Table 2. THERMAL CHARACTERISTICS

Package Type

Unit

48-lead LQFP

50

10

C/W

Table 3. PIN ASSIGNMENT

Pin No.

Mnemonic

Type

Description

1

GPIO9

General-purpose I/O pin that can be configured as digital inputs or outputs.

2

GPIO8

General-purpose I/O pin that can be configured as digital inputs or outputs.

3

FAN0/GPIO0

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

4

FAN1/GPIO1

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

5

FAN2/GPIO2

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

6

FAN3/GPIO3

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

7

3.3 V MAIN

Analog Input

Monitors the main 3.3 V system supply. Does not power the device.

8

DGND

Ground

Ground pin for digital circuits.

9

FAN4/GPIO4

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

10

FAN5/GPIO5

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

11

FAN6/GPIO6

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

12

FAN7/GPIO7

Digital I/O

Fan tachometer input with internal 10 kW pullup resistor to 3.3 V STBY. Can be

reconfigured as a general-purpose, open drain, digital I/O pin.

13

SCL

Digital Input

Open Drain Serial Bus Clock. Requires a 2.2 kW pullup resistor.

14

SDA

Digital I/O

Serial Bus Data. Open drain I/O. Requires a 2.2 kW pullup resistor.

15

ADD/NTESTOUT

Digital Input

This is a three-state input that controls the two LSBs of the serial bus address. It

also functions as the output for NAND tree testing.

16

CI

Digital Input

An active high input that captures a chassis intrusion event in Bit 6 of Status

Register 4. This bit remains set until cleared, as long as battery voltage is applied