Voltage - Supply is 1.425 V ~ 3.6 V - Interface - I/O Expanders Distributor - SX1509BIULTRT SX1509QBIULTRT

Part Number	Manufacturer / Brand	Brife Description	Part Status	Number of I/O	Interface	Interrupt Output	Features	Output Type	Current - Output Source/Sink	Clock Frequency	Voltage - Supply	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
SX1509BIULTRT	Semtech Corporation	IC GPIO EXPANDER I2C 16CH 28QFN	Active	16	I²C	Yes	Keypad Controller, LED Output, POR	Open Drain, Push-Pull	8mA, 15mA	400kHz	1.425 V ~ 3.6 V	-40°C ~ 85°C	Surface Mount	28-UFQFN Exposed Pad	28-QFN-UT (4x4)
SX1509QBIULTRT	Semtech Corporation	IC GPIO EXPANDER I2C 16CH 28QFN	Active	16	I²C	Yes	Keypad Controller, LED Output, POR	Open Drain, Push-Pull	8mA, 15mA	400kHz	1.425 V ~ 3.6 V	-40°C ~ 85°C	Surface Mount	28-UFQFN Exposed Pad	28-QFN-UT (4x4)