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TCA9555DBR The Texas Instruments TCA9555DBR is a 16-bit I/O expander designed for I2C and SMBus interfaces. It operates from 1.65V to 5.5V and features a 400 kHz clock frequency.
Mfr Part #:

TCA9555DBR

Available from 5 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments TCA9555DBR is a 16-bit I/O expander designed for I2C and SMBus interfaces. It operates from 1.65V to 5.5V and features a 400 kHz clock frequency.
✓ Total Stock: 58,460 pcs
$ Price Range: $0.70

TCA9555DBR Available from 5 distributors

✓ Authorised
✓ Non-Authorised
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

TCA9555DBR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Clock Frequency
Current
Features
Industrial Grade
Interface
Interrupt Output
Medical Grade
Military Grade
Mounting Type
Number of I
Operating Temperature
Output Type
Supplier Device Package
Supplier Package
Voltage
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TCA9555DBR Description

Short technical summary and product information.

The TCA9555DBR from Texas Instruments is a 16-bit general-purpose I/O expander that facilitates remote I/O expansion for microcontrollers via the I2C interface. This device operates within a voltage range of 1.65V to 5.5V and supports a maximum clock frequency of 400 kHz.

 

Key features include 16 I/O pins, an active-low interrupt output, and configuration registers. The I/O ports are 5V tolerant, and the device offers latched outputs with high-current drive capability, suitable for directly driving LEDs. It is available in a 24-SSOP package, designed for surface mounting.

 

This I/O expander is compatible with most microcontroller families and is suitable for applications requiring additional digital I/O pins. Its configurable slave address allows for multiple devices on the same I2C bus.

TCA9555DBR Quick Information

Product Type: IO Expander
Canonical Name: TCA9555 16-bit I2C/SMBus I/O Expander
Subcategory: I2C, I3C & SPI General-Purpose I/Os (GPIOs)

TCA9555DBR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

TCA9555DBR Estimated Pricing

Qty Low High
1+ $0.70 $0.70

Estimated market price range - modelled values for guidance only, not live distributor offers.

TCA9555DBR Features

  • 16-bit I/O expander for I2C/SMBus.
  • Operates from 1.65V to 5.5V supply.
  • Supports 400 kHz fast I2C bus.
  • Features active-low interrupt output.
  • Available in 24-SSOP surface mount package.

TCA9555DBR Applications

  • Extends microcontroller I/O capabilities.
  • Suitable for driving LEDs directly.
  • Compatible with most microcontrollers.
  • Enables remote I/O expansion.

TCA9555DBR FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the TCA9555DBR?

The TCA9555DBR operates from 1.65V to 5.5V.

What is the maximum clock frequency supported by the TCA9555DBR?

The TCA9555DBR supports a maximum clock frequency of 400 kHz.

What is the operating temperature range for this I/O expander?

The operating temperature range is -40°C to 85°C.

How many I/O pins does the TCA9555DBR provide?

The TCA9555DBR provides 16 I/O pins.

What interface does the TCA9555DBR use?

The TCA9555DBR uses the I²C and SMBus interface.

Does the TCA9555DBR have an interrupt output?

Yes, the TCA9555DBR features an active-low interrupt output.

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