PCAL9554CBS datasheet(30/42 Pages) NXP

Teilenummer	PCAL9554CBS

Bauteilbeschribung	Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up and Agile I/O

PDF	42 Pages

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Hersteller	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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30 / 42 page

PCAL9554B_PCAL9554C

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Product data sheet

Rev. 2 — 10 December 2012

30 of 42

NXP Semiconductors

PCAL9554B; PCAL9554C

Low-voltage 8-bit I2C-bus/SMBus low power I/O port

a. Interrupt load configuration

b. Voltage waveforms

CL includes probe and jig capacitance.

All inputs are supplied by generators having the following characteristics: PRR

 10 MHz; Z

o =50 ; tr/tf  30 ns.

All parameters and waveforms are not applicable to all devices.

(1) PCAL9554B address shown. Address for PCAL9554C is 0111,A2,A1,A0.

Fig 30. Interrupt load circuit and voltage waveforms

002aah069

DUT

CL = 100 pF

RL = 4.7 kΩ

INT

VDD

A2 A1 A0

slave address(1)

START condition

R/W

acknowledge

from slave

002aah130

8 bits (one data byte)

from port

acknowledge

from slave

SDA

no acknowledge

from master

data into

port

data from port

DATA 1

DATA 2

INT

DATA 2

DATA 1

STOP

condition

tv(INT)

trst(INT)

tsu(D)

12345678

SCL

ADDRESS

trst(INT)

View A - A

INT

tv(INT)

0.5 × VDD

View B - B

SCL

0.5 × VDD

INT

R/W

trst(INT)

0.3 × VDD

0.7 × VDD

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