DataSheetWiki


PCAL6416A fiches techniques PDF

NXP Semiconductors - Low-voltage translating 16-bit I2C-bus/SMBus I/O expander

Numéro de référence PCAL6416A
Description Low-voltage translating 16-bit I2C-bus/SMBus I/O expander
Fabricant NXP Semiconductors 
Logo NXP Semiconductors 





1 Page

No Preview Available !





PCAL6416A fiche technique
PCAL6416A
Low-voltage translating 16-bit I2C-bus/SMBus I/O expander
with interrupt output, reset, and configuration registers
Rev. 3 — 24 December 2012
Product data sheet
1. General description
The PCAL6416A is a 16-bit general purpose I/O expander that provides remote I/O
expansion for most microcontroller families via the I2C-bus interface.
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 PCAL6416A
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 VDD range of 1.65 V to 5.5 V on the dual power rail allows seamless
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 PCAL6416A: VDD(I2C-bus) and VDD(P). VDD(I2C-bus)
provides the supply voltage for the interface at the master side (for example, a
microcontroller) and the VDD(P) provides the supply for core circuits and Port P. The
bidirectional voltage level translation in the PCAL6416A is provided through VDD(I2C-bus).
VDD(I2C-bus)
should
be
connected
to the
http://www.DataSheet4U.net/
VDD
of
the
external
SCL/SDA
lines.
This
indicates
the VDD level of the I2C-bus to the PCAL6416A, while the voltage level on Port P of the
PCAL6416A is determined by the VDD(P).
The PCAL6416A contains the PCA6416A register set of four pairs of 8-bit Configuration,
Input, Output, and Polarity Inversion registers and additionally, the PCAL6416A has
Agile I/O, which are additional features specifically designed to enhance the I/O. These
additional features are: programmable output drive strength, latchable inputs,
programmable pull-up/pull-down resistors, maskable interrupt, interrupt status register,
programmable open-drain or push-pull outputs. The PCAL6416A is a pin-to-pin
replacement to the PCA6416A, however, the PCAL6416A powers up with all I/O interrupts
masked. This mask default allows for a board bring-up free of spurious interrupts at
power-up.
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. Programmable pull-up and pull-down resistors eliminate the need for discrete
components.
datasheet pdf - http://www.DataSheet4U.net/

PagesPages 54
Télécharger [ PCAL6416A ]


Fiche technique recommandé

No Description détaillée Fabricant
PCAL6416A Low-voltage translating 16-bit I2C-bus/SMBus I/O expander NXP Semiconductors
NXP Semiconductors

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche