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Description
I2C Bus I/O Expander, Texas Instruments
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Parameter | Symbol | Min | Typ | Max | Unit | Description |
---|---|---|---|---|---|---|
Supply Voltage | VCC | 1.65 | - | 5.5 | V | Operating supply voltage range |
Input Low Voltage Level | VIL | 0.3 | - | - | V | Maximum input low voltage level |
Input High Voltage Level | VIH | - | - | 0.7 | V | Minimum input high voltage level |
Output Low Voltage Level | VOL | 0.0 | - | 0.4 | V | Maximum output low voltage level |
Output High Voltage Level | VOH | 2.4 | - | VCC-0.4 | V | Minimum output high voltage level |
Leakage Current | IIOFF | - | - | 1 | μA | Leakage current when pin is off |
Output Sink Current | IOL | - | - | 20 | mA | Maximum output sink current |
Output Source Current | IOH | - | - | 10 | mA | Maximum output source current |
Input Capacitance | CIN | - | 10 | - | pF | Input capacitance |
Output Capacitance | COUT | - | 10 | - | pF | Output capacitance |
Power Consumption | Ptot | - | 1 | - | mW | Total power consumption at 3.3V, all pins high |
Power Supply:
I2C Communication:
Pin Configuration:
Register Map:
Reading and Writing:
Polarity Inversion:
Configuration:
Addressing:
Example Code:
// Example code to configure and use the TCA9555PWR with an I2C library
#include <Wire.h>
#define TCA9555_ADDRESS 0x20 // Default I2C address
void setup() {
Wire.begin();
// Configure Port 0 as input and Port 1 as output
Wire.beginTransmission(TCA9555_ADDRESS);
Wire.write(0x06); // Configuration Port 0
Wire.write(0xFF); // All inputs
Wire.endTransmission();
Wire.beginTransmission(TCA9555_ADDRESS);
Wire.write(0x07); // Configuration Port 1
Wire.write(0x00); // All outputs
Wire.endTransmission();
}
void loop() {
// Read input from Port 0
Wire.beginTransmission(TCA9555_ADDRESS);
Wire.write(0x00); // Input Port 0
Wire.endTransmission();
Wire.requestFrom(TCA9555_ADDRESS, 1);
byte input0 = Wire.read();
// Write output to Port 1
Wire.beginTransmission(TCA9555_ADDRESS);
Wire.write(0x03); // Output Port 1
Wire.write(input0); // Echo input to output
Wire.endTransmission();
}
This table and set of instructions should help you effectively use the TCA9555PWR in your projects.
(For reference only)Preview of the first 3 pages of the data sheet
QUANTITY | UNIT PRICE | PLUS UNIT PRICE | TOTAL PRICE |
---|---|---|---|
≥1: | US $6.68360 | US $6.01524 | US $6.01524 |
Substitute (equivalent) Product
Product Name | Description |
---|---|
TCA9538PWPR | 16-Bit I2C-bus and SMBus I/O Port with Interrupt Output and Reset Input, 24-pin SSOP package |
MCP23017-E/SS | 16-bit I/O Expander for I2C Bus, 28-pin SSOP package |
PCA9555PW | 16-bit I2C-bus I/O port with configuration register, 24-pin TSSOP package |
PCF8574APW | 8-bit I2C-bus and SMBus I/O-port, 16-pin TSSOP package |
MAX7312ESE | 16-bit I2C/SMBus I/O port with interrupt and reset, 24-pin TSSOP package |
Product Usage
The TCA9555PWR is a 16-bit I2C and SMBus I/O expander with interrupt output, which is commonly used in various circuits to expand the number of input/output (I/O) lines available on a microcontroller or other digital system. Here are some typical applications and circuits where you might find the TCA9555PWR:
Microcontroller I/O Expansion:
Industrial Control Systems:
Home Automation:
Embedded Systems:
Robotics:
Consumer Electronics:
Test and Measurement Equipment:
The TCA9555PWR is particularly useful in any application where you need to expand the number of digital I/O lines while maintaining a simple and efficient interface with a microcontroller or other digital system. Its I2C and SMBus compatibility make it easy to integrate into existing designs.
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All UTSOURCE purchases have a 90 days money back return policy, plus a 100 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
TCA9555PWR
TCA9555PWR has several brands around the world that may have alternate names for TCA9555PWR due to regional differences or acquisition. TCA9555PWR may also be known as the following names:
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