PCF8574NG4 Overview
The board has been programmed with 8 I/Os.In the packaging with the 16-DIP (0.300, 7.62mm), there is a device enclosed in the package.There is an option of the Tube case that you can choose from.There is a vote within the 2.5V~6V range that is supplied.The recommended mounting type is Through Hole, which makes it suitable for most applications.A device works when its operating temperature ranges from -40°C~85°C to -40°C~85°C.In order to achieve a good performance, it works at a frequency of 100kHz.The PCF8574 family of parts can be used to identify related parts.In addition, POR can also be founded when using this device.
PCF8574NG4 Features

PCF8574NG4 Applications
There are a lot of Texas Instruments
PCF8574NG4 I/O Expanders applications.

Repeaters, Radio Links, and Modems
Wireless Telemetry
JTRS
802.11x Receivers
IDEN
PHS
TD-SCDMA
CDMA2000
WCDMA
UMTS

Mounting Type	Through Hole
Package / Case	16-DIP (0.300, 7.62mm)
Operating Temperature	-40°C~85°C
Packaging	Tube
Feature	POR
Part Status	Discontinued
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Voltage - Supply	2.5V~6V
Base Part Number	PCF8574
Output Type	Push-Pull
Interface	I2C
Number of I/O	8
Clock Frequency	100kHz
Interrupt Output	Yes
Current - Output Source/Sink	1mA 25mA
RoHS Status	ROHS3 Compliant