TCA9539_16 datasheet(12/46 Pages) TI1

Part #	TCA9539

Description	Low Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output, Reset Pin, and Configuration Registers

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Voltage Waveforms

tbuf

ticr

tsth

tsds

tsdh

ticf

ticr

tscl

tsch

tsts

tvd(ack)

tvd(data)

0.3 × VCC

Stop

Condition

tsps

Repeat

Start

Condition

Start or

Repeat

Start

Condition

SCL

SDA

Start

Condition

(S)

Address

Bit 7

(MSB)

Data

Bit 10

(LSB)

Stop

Condition

(P)

SDA Load Configuration

ticf

Stop

Condition

(P)

tsp

0.7 × VCC

0.3 × VCC

0.7 × VCC

R/W

Bit 0

(LSB)

ACK

(A)

Data

Bit 07

(MSB)

Address

Bit 1

Address

Bit 6

BYTE

DESCRIPTION

1

I2C address

2, 3

P-port data

RL = 1 k

VCC

CL = 50 pF

(see Note A)

DUT

SDA

12

TCA9539

SCPS202C – OCTOBER 2009 – REVISED MAY 2016

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7 Parameter Measurement Information

A.

CL includes probe and jig capacitance.

B.

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

≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns.

C.

All parameters and waveforms are not applicable to all devices.

Figure 19. I2C Interface Load Circuit and Voltage Waveforms

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