PCA9701D,112 Overview
Using 16 (Input Only) I/Os, it is programmed.24-SOIC (0.295, 7.50mm Width) comes with the device enclosed in the packaging.The case comes in the Tube style.Votage is provided within 2.5V~5.5V.The mounting type recommended for it is Surface Mount.Devices work when the operating temperature ranges -40°C~125°C.The performance of the output frequency is determined by 5MHz.
PCA9701D,112 Features

PCA9701D,112 Applications
There are a lot of Rochester Electronics, LLC
PCA9701D,112 I/O Expanders applications.

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
802.11x Receivers

Mounting Type	Surface Mount
Package / Case	24-SOIC (0.295, 7.50mm Width)
Supplier Device Package	24-SO
Operating Temperature	-40°C~125°C
Packaging	Tube
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Voltage - Supply	2.5V~5.5V
Output Type	Push-Pull
Interface	SPI Serial
Number of I/O	16 (Input Only)
Clock Frequency	5MHz
Interrupt Output	Yes
RoHS Status	ROHS3 Compliant