6

TCA9543A

SCPS206B – MARCH 2014 – REVISED NOVEMBER 2019

www.ti.com

Product Folder Links: TCA9543A

Submit Documentation Feedback

Copyright © 2014–2019, Texas Instruments Incorporated

Electrical Characteristics

(1) (continued)

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

MIN TYP(2)

MAX

UNIT

(5)

Cio(ON) depends on the device capacitance and load that is downstream from the device.

Ci

A1, A0

VI = VCC or GND

(3)

1.65 V to 5.5 V

4.5

6

pF

INT1–INT0

VI = VCC or GND

(3)

1.65 V to 5.5 V

4.5

6

RESET

VI = VCC or GND

(3)

1.65 V to 5.5 V

4.5

5.5

Cio(OFF)

(5)

SCL, SDA

VI = VCC or GND

(3), Switch OFF

1.65 V to 5.5 V

15

19

pF

SC1–SC0, SD1–SD0

6

8

RON

Switch on-state resistance

VO = 0.4 V, IO = 15 mA

4.5 V to 5.5 V

4

10

16

Ω

3 V to 3.6 V

5

13

20

VO = 0.4 V, IO = 10 mA

2.3 V to 2.7 V

7

16

45

1.65 V to 1.95 V

10

25

70

(1)

A device internally must provide a hold time of at least 300-ns for the SDA signal (referred to as the VIH min of the SCL signal), in order

to bridge the undefined region of the falling edge of SCL.

(2)

Cb = total bus capacitance of one bus line in pF

(3)

Data taken using a 1-k

Ω pullup resistor and 50-pF load (see Figure 5)

6.6 I

2C Interface Timing Requirements

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 5)

STANDARD MODE

I2C BUS

FAST MODE

I2C BUS

UNIT

MIN

MAX

MIN

MAX

fscl

I2C clock frequency

0

100

0

400

kHz

tsch

I2C clock high time

4

0.6

μs

tscl

I2C clock low time

4.7

1.3

μs

tsp

I2C spike time

50

50

ns

tsds

I2C serial-data setup time

250

100

ns

tsdh

I2C serial-data hold time

0(1)

0(1)

μs

ticr

I2C input rise time

1000

20 + 0.1Cb

(2)

300

ns

ticf

I2C input fall time

300

20 + 0.1Cb

(2)

300

ns

tocf

I2C output fall time

10-pF to 400-pF bus

300

20 + 0.1Cb

(2)

300

ns

tbuf

I2C bus free time between stop and start

4.7

1.3

μs

tsts

I2C start or repeated start condition setup

4.7

0.6

μs

tsth

I2C start or repeated start condition hold

4

0.6

μs

tsps

I2C stop condition setup

4

0.6

μs

tvdL(Data) Valid-data time (high to low)

(3)

SCL low to SDA output low valid

1

1

μs

tvdH(Data) Valid-data time (low to high)

(3)

SCL low to SDA output high valid

0.6

0.6

μs

tvd(ack)

Valid-data time of ACK condition

ACK signal from SCL low

to SDA output low

1

1

μs

Cb

I2C bus capacitive load

400

400

pF