5

TCA9538

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SCPS199D – AUGUST 2014 – REVISED OCTOBER 2016

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(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

6.4 Thermal Information

THERMAL METRIC(1)

TCA9538

UNIT

PW (TSSOP)

DB (SSOP)

16 PINS

16 PINS

RθJA

Junction-to-ambient thermal resistance

122

113.2

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

56.4

63.6

°C/W

RθJB

Junction-to-board thermal resistance

67.1

64

°C/W

ψJT

Junction-to-top characterization parameter

10.8

21.2

°C/W

ψJB

Junction-to-board characterization parameter

66.5

63.4

°C/W

(1)

All typical values are at nominal supply voltage (1.8-, 2.5-, 3.3-, or 5-V VCC) and TA = 25°C.

(2)

Each P-port I/O configured as a high output must be externally limited to a maximum of 10 mA, and the total current sourced by all I/Os

(P-ports P7-P0) through VCC must be limited to a maximum current of 80 mA.

(3)

The SDA pin must be externally limited to a maximum of 12 mA, and the total current sunk by all I/Os (P-ports P7-P0, INT, and SDA)

through GND must be limited to a maximum current of 200 mA.

(4)

Each P-port I/O configured as a low output must be externally limited to a maximum of 25 mA, and the total current sunk by all I/Os (P-

ports P7-P0, INT, and SDA) through GND must be limited to a maximum current of 200 mA.

(5)

The INT pin must be externally limited to a maximum of 7 mA, and the total current sunk by all I/Os (P-ports P7-P0, INT, and SDA)

through GND must be limited to a maximum current of 200 mA.

6.5 Electrical Characteristics

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP(1)

MAX

UNIT

VIK

Input diode clamp voltage

II = –18 mA

1.65 V to 5.5 V

–1.2

V

VPORR Power-on reset voltage, VCC rising VI = VCC or GND, IO = 0

1.2

1.5

V

VPORF

Power-on reset voltage, VCC

falling

VI = VCC or GND, IO = 0

0.75

1

V

VOH

P-port high-level output voltage(2)

IOH = –8 mA

1.65 V

1.2

V

2.3 V

1.8

3 V

2.6

4.5 V

4.1

IOH = –10 mA

1.65 V

1.1

2.3 V

1.7

3 V

2.5

4.5 V

4

IOL

SDA (3)

VOL = 0.4 V

1.65 V to 5.5 V

3

11

mA

P port(4)

VOL = 0.5 V

1.65 V

8

10

2.3 V

8

13

3 V

8

15

4.5 V

8

17

VOL = 0.7 V

1.65 V

10

14

2.3 V

10

17

3 V

10

20

4.5 V

10

24

INT (5)

VOL = 0.4 V

1.65 V to 5.5 V

3

7

II

SCL, SDA

VI = VCC or GND

1.65 V to 5.5 V

±1

μA

A0, A1, RESET

±1

IIH

P port

VI = VCC

1.65 V to 5.5 V

1

μA

IIL

P port

VI = GND

1.65 V to 5.5 V

–1

μA