RT1715WSC Overview
There is a package called 9-UFBGA, WLCSP that contains it, and you can find it there. It is very easy to carry because of the Tape & Reel (TR)-shaped packaging. With a 2.7V~5.5VV power source, you should be able to use it. As you can see, the terminations of the wire are in 9. When 3.3V is used as the supply voltage, high efficiency can be achieved. Also, this device can generate HAVING 0.04125 MBPS MAX.DATA TRANSFER RATE.. There is a maximum operating temperature of 85°C°C that ensures stable operation of the device.
RT1715WSC Features
Maximum temperature of 85°C

RT1715WSC Applications
There are a lot of Richtek USA Inc.
RT1715WSC Controllers Interface ICs applications.

Smart LED Lighting
Portable Appliances
Battery-Operated Devices
Cellular Data Devices
Factory Automation and Process Controls
IrDA transmission control
Remote transmission formatter
Docking
Mobile Monitors
Multi-Function Monitors

Factory Lead Time	16 Weeks
Package / Case	9-UFBGA, WLCSP
Surface Mount	YES
Packaging	Tape & Reel (TR)
Published	2017
Pbfree Code	yes
Part Status	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Number of Terminations	9
Additional Feature	HAVING 0.04125 MBPS MAX.DATA TRANSFER RATE.
HTS Code	8542.31.00.01
Voltage - Supply	2.7V~5.5V
Terminal Position	BOTTOM
Terminal Form	BALL
Peak Reflow Temperature (Cel)	NOT SPECIFIED
Supply Voltage	3.3V
Terminal Pitch	0.4mm
Time@Peak Reflow Temperature-Max (s)	NOT SPECIFIED
JESD-30 Code	R-PBGA-B9
Function	Controller
Operating Temperature (Max)	85°C
Operating Temperature (Min)	-40°C
Temperature Grade	INDUSTRIAL
Interface	I2C
Data Rate	300 kbps
Protocol	USB
Length	1.38mm
Height Seated (Max)	0.6mm
Width	1.34mm
RoHS Status	ROHS3 Compliant