CD74AC139EE4 Overview
Including the pins on the rotary encoders, there are 16 total pins on the rotary encoders.If 1.5 V is greater than the minimum voltage, the supply should be able to provide power.As the maximum supply voltage (Vsup) of the encoder motor reaches the zero point, then 5.5 V is reached as well.
CD74AC139EE4 Features

CD74AC139EE4 Applications
There are a lot of Texas Instruments
CD74AC139EE4 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

Surface Mount	NO
Number of Terminals	16
Package Shape	RECTANGULAR
JESD-609 Code	e4
Pbfree Code	Yes
ECCN Code	EAR99
Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
HTS Code	8542.39.00.01
Packing Method	TUBE
Terminal Position	DUAL
Terminal Form	THROUGH-HOLE
Peak Reflow Temperature (Cel)	NOT SPECIFIED
Number of Functions	2
Terminal Pitch	2.54 mm
Reach Compliance Code	compliant
Pin Count	16
JESD-30 Code	R-PDIP-T16
Qualification Status	Not Qualified
Brand Name	Texas
Supply Voltage-Max (Vsup)	5.5 V
Power Supplies	3.3/5 V
Temperature Grade	MILITARY
Supply Voltage-Min (Vsup)	1.5 V
Family	AC
Seated Height-Max	5.08 mm
Output Polarity	INVERTED
Logic IC Type	OTHER DECODER/DRIVER
Max I(ol)	0.012 A
Propagation Delay (tpd)	131 ns
Input Conditioning	STANDARD
Length	19.305 mm
Width	7.62 mm