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Products
Interfaces
I²C, SPI, I3C Interface Devices
General Purpose I/O (GPIO)
- PCA6408A
- PCA6416A
- PCA8574/74A
- PCA8575
- PCA9500
- PCA9501
- PCA9502BS
- PCA9505/06
- PCA9534
- PCA9535A
- PCA9535_PCA9535C
- PCA9536
- PCA9537DP
- PCA9538
- PCA9538A
- PCA9539A
- PCA9539_PCA9539R
- PCA9554B_PCA9554C
- PCA9554_PCA9554A
- PCA9555
- PCA9555A
- PCA9557
- PCA9570
- PCA9574
- PCA9575
- PCA9670BS
- PCA9670PW
- PCA9671
- PCA9672
- PCA9673
- PCA9674_PCA9674A
- PCA9675
- PCA9698
- PCA9701_PCA9702
- PCA9703
- PCA9704PW
- PCAL6408A
- PCAL6416A
- PCAL6416AEX
- PCAL6524
- PCAL6534
- PCAL9535A
- PCAL9538A
- PCAL9539A
- PCAL9554B; PCAL9554C
- PCAL9555A
- PCAL9714
- PCAL9722
- PCF8574/74A
- PCF8575
PCAL6416A

The PCAL6416A is a 16-bit I²C GPIO expander with interrupt and reset functionality, designed to add remote I/O capabilities to microcontrollers. It features a built-in level-shifting mechanism, making it highly flexible in mixed-signal environments. Its wide voltage range across dual power rails enables seamless communication with next-generation low-voltage microprocessors and microcontrollers. The PCAL6416A is a pin-to-pin replacement for the PCA6416A, with additional Agile I/O features.

Data Sheet

Application Notes

Product Details

Block Diagram

PCAL6416A

Get diagram PDF

Features

Key Features

I²C-bus to parallel port expander
Operating power supply voltage range of 1.65 V to 5.5 V
Allows bidirectional voltage-level translation and GPIO expansion between:
- 1.8 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
- 2.5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
- 3.3 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
- 5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
Low standby current consumption:
- 1.5 μA typical at 5 V V_DD
- 1.0 μA typical at 3.3 V V_DD
Schmitt trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
- V_hys = 0.18 V (typical) at 1.8 V
- V_hys = 0.25 V (typical) at 2.5 V
- V_hys = 0.33 V (typical) at 3.3 V
- V_hys = 0.5 V (typical) at 5 V
5 V tolerant I/O ports
Active LOW reset input (RESET)
Open-drain active LOW interrupt output (INT)
400 kHz Fast-mode I²C-bus
Internal power-on reset
Power-up with all channels configured as inputs
No glitch on power-up
Noise filter on SCL/SDA inputs
Latched outputs with 25 mA drive maximum capability for directly driving LEDs
Latch-up performance exceeds 100 mA per JESD 78, Class II
ESD protection exceeds JESD 22
- 2000 V Human-Body Model (A114-A)
- 1000 V Charged-Device Model (C101)
Packages offered: TSSOP24, HWQFN24, UFBGA24, VFBGA24, XFBGA24, X2QFN24

Agile I/O Features

Software backward compatible with PCA6416A with interrupts disabled at power-up
Pin-to-pin drop-in replacement with PCA6416A
Output port configuration: bank selectable push-pull or open-drain output stages
Interrupt status: read-only register identifies the source of an interrupt
Bit-wise I/O programming features:
- Output drive strength: four programmable drive strengths to reduce rise and fall times in low-capacitance applications
- Input latch: Input Port register values changes are kept until the Input Port register is read
- Pull-up/pull-down enable: floating input or pull-up/pull-down resistor enable
- Pull-up/pull-down selection: 100 kΩ pull-up/pull-down resistor selection
- Interrupt mask: mask prevents the generation of the interrupt when input changes state to prevent spurious interrupts

Product Programs

Product Longevity

Participating products are available for a minimum of 10 years. Designated participating products developed for the automotive, telecom and medical segments are available for a minimum of 15 years.

Buy/Parametrics

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Documentation

Quick reference to our documentation types

1-10 of 11 documents

Compact List

Low Voltage Agile I/O GPIO Input/Output Characteristics[AN11496]

PDFAug 15, 2014Rev 1.0

Low-voltage translating 16-bit I2C-bus/SMBus I/O expander with interrupt output, reset, and configuration registers[PCAL6416A]

PDFAug 30, 2022Rev 7.1

SOT1199-1[SOT1199-1]

PDFSep 1, 2025Rev 2.0
plastic thermal enhanced very very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.75 mm[SOT994-1]

PDFSep 20, 2019Rev 1.1
plastic, thermal enhanced super thin quad flat package; no leads;24 terminals; 2.0 x 2.0 x 0.35 mm body[SOT1895-1]

PDFJul 12, 2017Rev 2.1
plastic thin shrink small outline package; 24 leads; body width 4.4 mm[SOT355-1]

PDFFeb 8, 2016Rev 1.0
UFBGA24: plastic ultra thin fine-pitch ball grid array package; 24 balls[SOT1361-1]

PDFFeb 8, 2016Rev 1.0

HWQFN24; Reel pack, SMD, 13" Q2/T3 standard product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128[SOT994-1_128]

PDFJul 15, 2016Rev 1.1
VFBGA24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118[SOT1199-1_118]

PDFSep 8, 2014Rev 1.0
TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118[SOT355-1_118]

PDFApr 15, 2013Rev 4.1

UM11111[UM11111]

PDFApr 12, 2018Rev 1

Design Resources

Design Files

Quick reference to our design files types.

2 design files

Receive the full breakdown. See the product footprint and more in the eCad file.

Symbols and Footprints
PCAL6416AEX1-X2QFN24-CAD Symbol and PCB Footprint – BXL File

ZIPRev 1Jul 9, 2020 13:13:0037.37 KBPCAL6416AEX1-X2QFN24-BXL

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Design Files - miscellaneous
Expert mode sample code PCAL6416A

TXTRev 1.0Dec 10, 2014 00:00:001.65 KBWRITE-READ-PCAL6416A
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Hardware

Quick reference to our board types.

2 hardware offerings

Evaluation and Development Boards
PCAL6416A 16-bit GPIO Arduino^® Shield Evaluation Board Expansion Board

PCAL6416AEV-ARD
Evaluation and Development Boards
FRDM i.MX 8M Plus Development Board
Active

FRDM-IMX8MPLUS

Engineering Services

To get further assistance directly from NXP, please see our Engineering Services.

1 engineering service

Independent Design House (IDH)
Embedded Software Design

By TAGnology RFID GmbH GoldHQ: Voitsberg, AustriaSupporting Regions: EMEA

To find additional partner offerings that support this product, visit our Partner Marketplace.

Training

1 trainings

On-Demand
NXP’s differentiating GPIO expanders address system challenges in emerging applications

32 minEnglish

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Support

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Recommended Communities

Other NXP Products

Low-Voltage Translating 16-Bit I²C-Bus/SMBus I/O Expander

Product Details

Block Diagram

PCAL6416A

Features

Key Features

Agile I/O Features

Product Programs

Product Longevity

Applications

Consumer

Industrial

Buy/Parametrics

Documentation

Filter by

Application Note (1)

Low Voltage Agile I/O GPIO Input/Output Characteristics[AN11496]

Data Sheet (1)

Low-voltage translating 16-bit I2C-bus/SMBus I/O expander with interrupt output, reset, and configuration registers[PCAL6416A]

Package Information (5)

SOT1199-1[SOT1199-1]

plastic thermal enhanced very very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.75 mm[SOT994-1]

plastic, thermal enhanced super thin quad flat package; no leads;24 terminals; 2.0 x 2.0 x 0.35 mm body[SOT1895-1]

plastic thin shrink small outline package; 24 leads; body width 4.4 mm[SOT355-1]

UFBGA24: plastic ultra thin fine-pitch ball grid array package; 24 balls[SOT1361-1]

Packing Information (3)

HWQFN24; Reel pack, SMD, 13" Q2/T3 standard product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128[SOT994-1_128]

VFBGA24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118[SOT1199-1_118]

TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118[SOT355-1_118]

User Guide (1)

UM11111[UM11111]

Design Resources

Design Files

Filter by

PCAL6416AEX1-X2QFN24-CAD Symbol and PCB Footprint – BXL File

Expert mode sample code PCAL6416A

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Hardware

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PCAL6416A 16-bit GPIO Arduino® Shield Evaluation Board Expansion Board

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Engineering Services

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Training

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Support

What do you need help with?

Recommended Communities

PCAL6416A 16-bit GPIO Arduino^® Shield Evaluation Board Expansion Board