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TCA6416ARTWR
Low-Voltage 16-Bit I2C and SMBus I/O Expander
TCA6416A2Cor SMBus
SDASCL
INT
P10P11P12P13
VCCI
VCCP
P00P01P02P03
P04P05P06P07
Peripheral
Devices RESET,
ENABLE,
orcontrol
inputs INT
status
outputs LEDs
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TCA6416ASCPS194D –MAY 2009–REVISED AUGUST 2017
TCA6416A Low-Voltage 16-BitI2C and SMBus I/O Expander With Voltage Translation,
Interrupt Output, Reset Input, and Configuration Registers FeaturesI2Cto Parallel Port Expander Operating Power-Supply Voltage Rangeof 1.65V 5.5V Allows Bidirectional Voltage-Level Translation and
GPIO Expansion Between 1.8-V, 2.5-V, 3.3-V,
and 5-VI2C Bus and P-Ports Low Standby Current Consumptionof3 μA 5-V Tolerant I/O Ports 400-kHz FastI2C Bus Hardware Address Pin Allows Two TCA6416A
Deviceson the SameI2 C/SMBus Bus Active-Low Reset Input (RESET) Open-Drain Active-Low Interrupt Output (INT) Input/Output Configuration Register Polarity Inversion Register Internal Power-On Reset Power-Up WithAll Channels Configuredas Inputs No Glitch On Power Up Noise Filteron SCL/SDA Inputs Latched Outputs With High-Current Drive
Maximum Capabilityfor Directly Driving LEDs Latch-Up Performance Exceeds 100 mA Per
JESD 78, ClassII ESD Protection Exceeds JESD22 2000-V Human-Body Model (A114-A) 200-V Machine Model (A115-A) 1000-V Charged-Device Model (C101)
Applications Servers Routers (Telecom Switching Equipment) Personal Computers Personal Electronics (For Example, Gaming
Consoles) Industrial Automation Products With GPIO-Limited Processors
DescriptionThe TCA6416Aisa 24-pin device that provides 16-
bits of general purpose parallel input/output (I/O)
expansion for the two-line bidirectionalI2C bus (or
SMBus) protocol. The device can operate witha
power supply voltage ranging from 1.65Vto 5.5Von
theI2C bus side (VCCI) anda power supply voltage
ranging from 1.65V to 5.5V on the P-port side
(VCCP).
The device supports both 100-kHz (Standard-mode)
and 400-kHz (Fast-mode) clock frequencies. I/O
expanders such as the TCA6416A providea simple
solution when additional I/Os are needed for
switches, sensors, push-buttons, LEDs, fans, etc.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe datasheet.
Simplified Schematic