DESCRIPTION/ORDERING INFORMATION (CONTINUED)

TCA6416

on the SDA/SCL side. This allows the TCA6416 to interface with next-generation microprocessors and

microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to

the dropping power supplies of microprocessors and microcontrollers, some PCB components, such as LEDs,

remain at a 5-V power supply.

The TCA6416 consists of two 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion

(active high) registers. At power on, the I/Os are configured as inputs. However, the system master can enable

the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is

kept in the corresponding input or output register. The polarity of the Input Port register can be inverted with the

Polarity Inversion register. All registers can be read by the system master.

The system master can reset the TCA6416 in the event of a timeout or other improper operation by asserting a

state machine. The RESET pin causes the same reset/initialization to occur without depowering the part.

The TCA6416 open-drain interrupt (INT) output is activated when any input state differs from its corresponding

Input Port register state and is used to indicate to the system master that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the

remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via

The device P-port outputs have high-current sink capabilities for directly driving LEDs while consuming low

device current.

ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

BGA – ZQS (Pb-free)

Reel of 1000

TCA6416ZQSR

PH416

QFN – RTW

Reel of 3000

TCA6416RTWR

PH416

–40°C to 85°C

Tube of 70

TCA6416PW

TSSOP – PW

PH416

Reel of 2000

TCA6416PWR

(1)

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

(2)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

ZQS Package Terminal Assignments

E

P13

P11

P10

GND

P06

D

P15

P14

P12

P07

P05

C

P16

P17

P01

P04

P03

B

ADDR

NB

P02

A

SCL

SDA

INT

RESET

P00

5

4

3

2

1

2

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