PAC1932SLASH3SLASH4 datasheet(15/62 Pages) MICROCHIP

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DS20005850C-page 15

PAC1932/3/4

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

3.1

SenseN+/SenseN– (N=1,2,3,4)

These two pins form the differential input for measuring

voltage across a sense resistor in the application. The

positive input (SenseN+) also acts as the input pin for

bus voltage.

3.2

Ground (GND)

System ground.

3.3

SMBus Data (SM_DATA)

This is the bi-directional SMBus data pin. This pin is

open drain, and requires a pull-up resistor to VDD I/O.

3.4

SMBus Clock (SM_CLK)

This is the SMBus clock input pin.

3.5

Positive Power Supply Voltage

(VDD)

Power supply input pin for the device. 2.7-5.5V range,

bypass with 100 nF ceramic capacitor to ground near

the IC.

3.6

Digital Power Reference Voltage

(VDD I/O)

Connect this pin to the power supply voltage for the

digital controller driving the SMBus pins and digital

input pins for the device, 1.62V-5.5V. Bypass with

100 nF ceramic capacitor to ground near the IC. This

pin does not supply power, instead it acts as the VIH

reference.

3.7

Address Selection (ADDR_SEL)

Connect a resistor from this pin to ground to select

SMBus address.

TABLE 3-1:

PIN DESCRIPTIONS

QFN

WLCSP16

Symbol

Pin Type

Description

1C3

SLOW/ALERT

Digital I/O pin

Voltage range is set by VDD I/O pin. Default function is

SLOW, may be programmed to function as ALERT pin

(Open Collector when functioning as ALERT, requires pull-up

resistor to VDD I/O).

2A4

VDD

Power for IC

Positive power supply voltage.

GND

Ground pin

Ground for the IC.

SM_CLK

SMBus clock input

Clock Input pin.

SM_DATA

SMBus data I/O

Open drain requires pull-up resistor to VDD I/O.

ADDRSEL

Analog I/O pin

Address selection for the SMBus Slave address.

7C1

SENSE3

-(1)

32V analog pin

0-32V range, connect to load side of sense resistor.

8D1

SENSE3+(1)

32V analog pin

0-32V range, connect to supply side of sense resistor.

9D2

SENSE4

-(1)

32V analog pin

0-32V range, connect to load side of sense resistor.

SENSE4+(1)

32V analog pin

0-32V range, connect to supply side of sense resistor.

SENSE1+

32V analog pin

0-32V range, connect to supply side of sense resistor.

SENSE1

32V analog pin

0-32V range, connect to load side of sense resistor.

SENSE2+

32V analog pin

0-32V range, connect to supply side of sense resistor.

SENSE2-

32V analog pin

0-32V range, connect to load side of sense resistor.

VDD I/O

Sets VIH

reference for digital

I/O

Digital power reference level for digital I/O.

PWRDN

Digital input pin

Voltage range is set by VDD I/O pin. Active low puts the

device in power-down state (all circuitry is powered down

including SMBus).

—

N/C

The Exposed pad is not electrically connected.

Note 1:

For PAC1932, pins 7,8,9,10 are not connected inside and should be grounded.

For PAC1933, pins 9 and 10 are not connected inside and should be grounded.

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