TCA9554ADBQR

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TCA9554ADBQR

IC I/O EXPANDER I2C 8BIT 16SSOP

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規格

Supplier Texas Instruments,Rochester Electronics, LLC
Package Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus Active
NumberofI/O 8
Interface I²C, SMBus
InterruptOutput Yes
Features POR
OutputType Push-Pull
ClockFrequency 400 kHz
Voltage-Supply 1.65V ~ 5.5V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 16-SSOP (0.154, 3.90mm Width)

概述

Description

TCA9554ADBQR is an 8‑bit I/O expander with an I2C interface. It lets a microcontroller extend its GPIOs by providing eight configurable I/O pins that can be set as inputs or outputs. Controlled via I2C registers (direction, output latch, GPIO read, and optional input polarity), with an interrupt output to signal input changes. Addressing is configurable with A0–A2 pins, allowing up to eight devices on the same I2C bus. The suffixes “DBQR” indicate packaging and RoHS/tape‑and‑reel options for this variant (exact package type should be confirmed in the datasheet). Typical uses include expanding GPIOs for sensors, switches, LEDs, and keypad scanning in embedded systems. For precise electrical specs, timing, register map, and packaging details, refer to the official datasheet.

Features

TCA9554ADBQR Features (concise):
- 8-bit I/O expander for I2C bus with interrupt output
- 8 bidirectional I/O pins; configurable as input or output via IODIR
- I2C interface up to Fast-mode (400 kHz)
- 3-bit hard-wired addressing (A0–A2) for up to 8 devices on the bus
- Input polarity inversion control (IPOL)
- Separate input/output data handling via PORT and OLAT-style registers
- Interrupt output (usually open-drain) for port-change events
- Wide supply range: typically 1.65 V to 5.5 V
- 16-pin package (specific package code in part suffix)
Note: exact electrical specs (voltage, temperature range, and current limits) are in the datasheet for the ADBQR variant.

Package

It’s a 16‑pin surface-mount device in a TSSOP‑16 package, supplied in tape‑and‑reel (QR) packaging.

Pinout

Pin count: 14 pins.
Function: NXP TCA9554ADBQR is an I2C-bus 8-bit I/O expander. It provides eight configurable GPIO pins (P0–P7) with I/O direction, input, and output control via I2C registers.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: An American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits and other semiconductor devices.

Application

8-bit I2C I/O expander (TCA9554A) that provides extra GPIOs for MCU/SoC. Suitable for:
- Extending I/O for LED indicators and backlight control
- Keypad/switch matrix scanning and general input capture
- Driving small relays or transistors (via buffer if needed)
- Interface to sensors, ADCs, DACs or other I2C peripherals
- Port expansion in embedded systems, consumer electronics, home/industrial automation
- Interrupt/polled event notification for detected changes

Equivalent

Equivalents (I2C, 8-bit I/O expanders):
- NXP: PCF8574 / PCF8574A
- NXP: TCA9534 / TCA9534A
- ON Semiconductor: CAT9554
- Microchip: MCP23008
Related 16-bit options:
- NXP: PCF8575
- Microchip: MCP23x17 (MCP23017)

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