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Texas Instruments-74CBTK6800DBQRE4 Bus Switches Bus Switch 1-Element CMOS 10-IN 24-Pin SSOP T/R
Integrated Circuits (ICs)

PCA9539DBQR

Active
Texas Instruments

16-BIT 2.3- TO 5.5-V I2C/SMBUS I/O EXPANDER WITH INTERRUPT, RESET & CONFIG REGISTERS

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Search across all available documentation for this part.

DocumentsProgramming Fun Lights With TI's TCA6507Maximum Clock Frequency of I2C Bus Using Repeaters+9
Texas Instruments-74CBTK6800DBQRE4 Bus Switches Bus Switch 1-Element CMOS 10-IN 24-Pin SSOP T/R
Integrated Circuits (ICs)

PCA9539DBQR

Active
Texas Instruments

16-BIT 2.3- TO 5.5-V I2C/SMBUS I/O EXPANDER WITH INTERRUPT, RESET & CONFIG REGISTERS

Deep-Dive with AI

DocumentsProgramming Fun Lights With TI's TCA6507Maximum Clock Frequency of I2C Bus Using Repeaters+9

Technical Specifications

Parameters and characteristics for this part

SpecificationPCA9539DBQR
Clock Frequency400 kHz
Current - Output Source/Sink [custom]10 mA
Current - Output Source/Sink [custom]25 mA
FeaturesPOR
InterfaceI2C, SMBus
Interrupt OutputTrue
Mounting TypeSurface Mount
Number of I/O16
Operating Temperature [Max]85 °C
Operating Temperature [Min]-40 °C
Output TypePush-Pull
Package / Case24-SSOP
Package / Case [custom]0.154 ", 3.9 mm
Supplier Device Package24-SSOP
Voltage - Supply [Max]5.5 V
Voltage - Supply [Min]2.3 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
DigikeyCut Tape (CT) 1$ 2.26
Digi-Reel® 1$ 2.26
Tape & Reel (TR) 2500$ 1.03
5000$ 1.00
Texas InstrumentsLARGE T&R 1$ 1.87
100$ 1.54
250$ 1.11
1000$ 0.83

Description

General part information

PCA9539 Series

The system master can reset the PCA9539 in the event of a time-out or other improper operation by asserting a low in theRESETinput. The power-on reset puts the registers in their default state and initializes the I2C/SMBus state machine. AssertingRESETcauses the same reset/initialization to occur without de-powering the part.

The PCA9539 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.

INTcan 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 I2C bus. Thus, the PCA9539 can remain a simple slave device.