CY74FCT257CTQCT Overview
In total, the rotary encoders has 16 pins in total.Ideally, 4.75 V should be higher than the required minimum supply voltage.There is a maximum supply voltage (Vsup) of a encoder motor where 5.25 V is reached.
CY74FCT257CTQCT Features

CY74FCT257CTQCT Applications
There are a lot of Cypress Semiconductor
CY74FCT257CTQCT Encoders, Decoders, Converters applications.

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

Surface Mount	YES
Number of Terminals	16
Package Shape	RECTANGULAR
Terminal Position	DUAL
Terminal Form	GULL WING
Number of Functions	4
Terminal Pitch	0.635 mm
Reach Compliance Code	unknown
Pin Count	16
JESD-30 Code	R-PDSO-G16
Number of Outputs	1
Qualification Status	COMMERCIAL
Supply Voltage-Max (Vsup)	5.25 V
Temperature Grade	COMMERCIAL
Supply Voltage-Min (Vsup)	4.75 V
Family	FCT
Number of Inputs	2
Output Characteristics	3-STATE
Seated Height-Max	1.75 mm
Output Polarity	TRUE
Logic IC Type	MULTIPLEXER
Propagation Delay (tpd)	5.2 ns
Width	3.9116 mm
Length	4.9 mm