PCA9555HF,118 Overview
16 I/Os are programmed into it.24-WFQFN Exposed Pad packaging contains the device.Case Tape & Reel (TR) is available.Voting within 2.3V~5.5V is provided.Surface Mount is the recommended mounting type.If the operating temperature ranges from -40°C~85°C to Y, the device will work.Performance is achieved by its output frequency at 400kHz.This device can also be used to establish POR.
PCA9555HF,118 Features

PCA9555HF,118 Applications
There are a lot of Rochester Electronics, LLC
PCA9555HF,118 I/O Expanders applications.

Antialiasing/Reconstruction Filter
Single-Ended to Differential Conversion/Amplification
Low Voltage, Low Noise, Differential Signal Processing
Common Mode Voltage Translation
Portable Instrumentation
Multiprotocol RFID Readers: EPC-GEN2, ISD and IPX
IDEN, PHS, GSM Basestations
Repeaters, Radio Links, and Modems
Wireless Telemetry
JTRS

Mounting Type	Surface Mount
Package / Case	24-WFQFN Exposed Pad
Supplier Device Package	24-HWQFN (4x4)
Operating Temperature	-40°C~85°C
Packaging	Tape & Reel (TR)
Feature	POR
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Voltage - Supply	2.3V~5.5V
Output Type	Push-Pull
Interface	I2C, SMBus
Number of I/O	16
Clock Frequency	400kHz
Interrupt Output	Yes
Current - Output Source/Sink	10mA 25mA
RoHS Status	ROHS3 Compliant