TCA6424RGJR ,Low-Voltage 24 Bit I2C and SMBus I/O Expander With Interrupt Output Reset and Config Registers 32-UQFN -40 to 85Features 2 DescriptionThis 24-bit I/O expander for the two-line bidirectional1• Operating Power-Sup ..
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TCA6424RGJR
Low-Voltage 24 Bit I2C and SMBus I/O Expander With Interrupt Output Reset and Config Registers 32-UQFN -40 to 85
RGJ PACKAGE
(BOTTOM VIEW)P00
ADDR
P01
P17
P02
P16
P03
P15
P04
P14
P05
P13
P21P25
P06
RESET
P07
VCCI
GND
INT P10
VCCP
P11
SDA P12
SCL234567817242322212019
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TCA6424 Features 2 DescriptionThis 24-bit I/O expander for the two-line bidirectional Operating Power-Supply Voltage Rangeof 1.65V bus(I2C)is designed general-purposeto 5.5V remote I/O expansion most microcontroller• Allows Bidirectional Voltage-Level Translation and families via theI2C interface clock (SCL) andGPIO Expansion Between: serial data (SDA)]. 1.8-V SCL/SDA and The major benefitof thisisits wide VCC range.1.8-V, 2.5-V, 3.3-V,or 5-VP Port It can operate from 1.65Vto 5.5Von the P-port side 2.5-V SCL/SDA and and on the SDA/SCL side. This allows the TCA6424 interface with next-generation microprocessors and1.8-V, 2.5-V, 3.3-V,or 5-VP Port
microcontrollers on the SDA/SCL side, where supply– 3.3-V SCL/SDA and levels are dropping conserve power. In1.8-V, 2.5-V, 3.3-V,or 5-VP Port contrast to the dropping power supplies of– 5-V SCL/SDA and microprocessors and some PCB1.8-V, 2.5-V, 3.3-V,or 5-VP Port components, such asata 5-V power
supply.•I2Cto Parallel Port Expander Low Standby Current Consumptionof1 μA The bidirectional voltage level translation in the
TCA6424is provided through VCCI. VCCI should be• Schmitt-Trigger Action Allows Slow Input connectedto the VCCof the external SCL/SDA lines.Transition and Better Switching Noise Immunityatthe SCL and SDA Inputs– Vhys= 0.18V Typat 1.8V Vhys= 0.25V Typat 2.5V– Vhys= 0.33V Typat 3.3V– Vhys= 0.5V Typat5V• 5-V Tolerant I/O Ports
(1) Forall available packages, see the orderable addendumat• Active-Low Reset (RESET) Input the endofthe datasheet.• Open-Drain Active-Low Interrupt (INT) Output 400-kHz FastI2C Bus Input/Output Configuration Register Polarity Inversion Register Internal Power-On Reset Power Up WithAll Channels Configuredas Inputs No Glitch On Power Up SCL/SDA Inputs High-Current Drivefor Directly Driving LEDs 100 mA
