PCAL9714 datasheet(1/56 Pages) NXP

Part #	PCAL9714

Description	Ultra low-voltage translating 14-bit SPI I/O expander with Agile I/O features, interrupt output, and reset

PDF	56 Pages

Scroll/Zoom	100%

Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

Logo

1 / 56 page

PCAL9714

Ultra low-voltage translating 14-bit SPI I/O expander with Agile I/O features,

interrupt output, and reset

Rev. 1.0 — 1 May 2023

Product data sheet

1 General description

The PCAL9714 is a 14-bit general purpose I/O expander that provides remote I/O expansion for most

microcontroller families via the Serial Peripheral Interface (SPI). The ultra low-voltage interface allows for direct

connection with the microcontroller operating down to 1.1 V.

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 down to 1.1 V to I/O devices operating at a different voltage level 1.65 V to 5.5 V. The

PCAL9714 has built-in level shifting feature that makes these devices extremely flexible in mixed power

supply systems where communication between incompatible I/O voltages is required, allowing seamless

communications with next-generation low voltage microprocessors and microcontrollers on the interface side

and peripherals at a higher voltage on the port side.

There are two supply voltages for PCAL9714: VDD(SPI) and VDD(P). VDD(SPI) 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 PCAL9714 is provided through VDD(SPI). VDD(SPI)

should be connected to the VDD of the external SPI interface lines. This indicates the VDD level of the SPI to the

PCAL9714, while the voltage level on Port P of the PCAL9714 is determined by the VDD(P).

The PCAL9714 works with the SPI speed at 5 MHz and implements 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 pullup/pulldown resistors, maskable interrupt, interrupt status register,

programmable open-drain or push-pull outputs.

Additional Agile I/O Plus features include interrupts specified by level or edge, and they can be cleared

individually without disturbing the other interrupt events. Also, switch debounce hardware is implemented.

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 pullup and pulldown resistors eliminate the need

for discrete components.

The system master can reset the PCAL9714 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 SPI

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

The PCAL9714 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 SPI. Thus, the PCAL9714 can remain a simple slave device. The input latch feature holds or latches the

input pin state and keeps the logic values that created the interrupt until the master can service the interrupt.

This minimizes the host’s interrupt service response for fast moving inputs.

Similar Part No. - PCAL9714

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCAL9722	778Kb / 63P	Ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset Rev. 1.1 1 May 2023
	PCAL9722HN	778Kb / 63P	Ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset Rev. 1.1 1 May 2023
	PCAL9722HN/Q900	778Kb / 63P	Ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset Rev. 1.1 1 May 2023
	PCAL9722HN/Q900MP	778Kb / 63P	Ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset Rev. 1.1 1 May 2023
	PCAL9722HNMP	778Kb / 63P	Ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset Rev. 1.1 1 May 2023

More results

Similar Description - PCAL9714

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCAL6524HEAZ	2Mb / 69P	Ultra low-voltage translating 24-bit Fm I2C-bus/SMBus I/O expander with Agile I/O features, interrupt output and reset Rev.1.1-21 September 2016
Texas Instruments	TCAL6416	1Mb / 42P	TCAL6416 Low-Voltage Translating, 16-Bit I2C-Bus/SMBus I/O Expander with Interrupt Output, Reset, and Agile I/O Configuration Registers JUNE 2022
	TCAL6416	1Mb / 43P	TCAL6416 Low-Voltage Translating, 16-Bit I2C-Bus/SMBus I/O Expander with Interrupt Output, Reset, and Agile I/O Configuration Registers JUNE 2022
	TCAL9538	1Mb / 49P	TCAL9538 8-Bit I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers NOVEMBER 2022
	TCAL6408	1Mb / 39P	TCAL6408 8-Bit Translating I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers REVISED DECEMBER 2022
	TCAL6408	1Mb / 42P	TCAL6408 8-Bit Translating I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers REVISED DECEMBER 2022
	TCAL6408	1Mb / 45P	TCAL6408 8-Bit Translating I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers REVISED DECEMBER 2022
	TCAL6408	1Mb / 48P	TCAL6408 8-Bit Translating I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers REVISED NOVEMBER 2023
	TCAL9538	1Mb / 41P	TCAL9538 8-Bit I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers REVISED NOVEMBER 2023
	TCAL6408	1Mb / 51P	TCAL6408 8-Bit Translating I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers REVISED NOVEMBER 2023

More results

PCAL9714 Datasheet(PDF) 1 Page - NXP Semiconductors

PCAL9714 Datasheet(HTML) 1 Page - NXP Semiconductors

Similar Part No. - PCAL9714

Similar Description - PCAL9714

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Datasheet Download

Link URL