SN74LS138NE4 Overview
It is embedded in a PDIP-16 package so that it can be taken anywhere.Packing the encoder in a Tube case would be a good idea.The mounting of this motor encoder is in the way of Through Hole.Decoder/Demultiplexer is a category that can be applied to the type.A supply voltage of 5 V is used in the operation of this converter.Ideally, it would be best to package this encoder magnetic in a 16-PDIP case.The SN74LS138 series includes this electrical quadrature encode.I have noticed that the encoder definition has Quad on it.
SN74LS138NE4 Features
In PDIP-16 package
Mounting Type: Through Hole
Quad circuits

SN74LS138NE4 Applications
There are a lot of Texas Instruments
SN74LS138NE4 Encoders, Decoders, Converters applications.

Lighting Control
Low-voltage operation
Extended temperature range
Low power consumption
UART Interfacing
Infrared Data Communications
Audio
Automotive
Broadband
Digital Control

Package / Case	PDIP-16
Mounting Type	Through Hole
Supplier Device Package	16-PDIP
Mounting Style	Through Hole
RoHS	Details
Logic Family	LS
Minimum Operating Temperature	0 C
Maximum Operating Temperature	+ 70 C
Package	Tube
Mfr	Texas Instruments
Product Status	Active
Packaging	Tube
Series	SN74LS138
Operating Temperature	0°C ~ 70°C
Type	Decoder/Demultiplexer
Voltage - Supply	4.75V ~ 5.25V
Function	Decoder/Demultiplexer
Operating Supply Voltage	5 V
Circuit	1 x 3:8
Number of Circuits	Quad
Current - Output High, Low	400µA, 8mA
Logic Type	Decoders/Demultiplexers
Operating Temperature Range	0 C to + 70 C
High Level Output Current	- 0.4 mA
Low Level Output Current	8 mA
Number of Input Lines	3 Input
Voltage Supply Source	Single Supply
Independent Circuits	1
Number of Output Lines	8 Output
Product	Decoders / Demultiplexers
Height	4.57 mm
Length	19.3 mm
Width	6.35 mm