PCA6416AHF,128 NXP Semiconductors, PCA6416AHF,128 Datasheet

PCA6416AHF,128

Manufacturer Part Number

PCA6416AHF,128

Description

Interface - I/O Expanders

Manufacturer

NXP Semiconductors

Datasheet

1.PCA6416AHF128.pdf (42 pages)

Specifications of PCA6416AHF,128

Rohs

yes

Maximum Operating Frequency

100 kHz

Operating Supply Voltage

1.65 V to 5.5 V

Operating Temperature Range

- 40 C to + 85 C

Mounting Style

SMD/SMT

Package / Case

HWQFN-24

Operating Current

200 mA

Output Current

10 mA

Product Type

I/O Expanders

Factory Pack Quantity

6000

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1. General description

The PCA6416A is a 16-bit general purpose I/O expander that provides remote I/O

expansion for most microcontroller families via the I

NXP I/O expanders provide a simple solution when additional I/Os are needed while

keeping interconnections to a minimum, for example, in battery-powered mobile

applications for interfacing to sensors, push buttons, keypad, etc. In addition to providing

a flexible set of GPIOs, it simplifies interconnection of a processor running at one voltage

level to I/O devices operating at a different (usually higher) voltage level. The PCA6416A

has built-in level shifting feature that makes these devices extremely flexible in mixed

signal environments where communication between incompatible I/O voltages is required.

Its wide V

communications with next-generation low voltage microprocessors and microcontrollers

on the interface side (SDA/SCL) and peripherals at a higher voltage on the port side.

There are two supply voltages for PCA6416A: V

provides the supply voltage for the interface at the master side (for example, a

microcontroller) and the V

bidirectional voltage level translation in the PCA6416A is provided through V

the V

PCA6416A is determined by the V

The PCA6416A register set consists of four pairs of 8-bit Configuration, Input, Output, and

Polarity Inversion 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, saving external

logic gates.

The system master can reset the PCA6416A in the event of a time-out or other improper

operation by asserting a LOW in the RESET input. The power-on reset puts the registers

in their default state and initializes the I

causes the same reset/initialization to occur without depowering the part.

The PCA6416A 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.

DD(I2C-bus)

PCA6416A

Low-voltage translating 16-bit I

with interrupt output, reset, and configuration registers

Rev. 2. — 10 January 2013

level of the I

should be connected to the V

range of 1.65 V to 5.5 V on the dual power rail allows seamless

C-bus to the PCA6416A. The voltage level on Port P of the

DD(P)

provides the supply for core circuits and Port P. The

DD(P)

C-bus/SMBus state machine. The RESET pin

of the external SCL/SDA lines. This indicates

C-bus/SMBus I/O expander

DD(I2C-bus)

C-bus interface.

and V

DD(P)

Product data sheet

. V

DD(I2C-bus)

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