5 Pin Configuration and Functions

Figure 5-1 RTJ Package20-Pin WQFN With Exposed Thermal Pad (Top View)

PIN		TYPE⁽¹⁾	DESCRIPTION
NO.	NAME	TYPE⁽¹⁾	DESCRIPTION
1	OUT3	O	General-purpose digital output
2	DGND	G	Digital ground
3	NCS	I	SPI negative chip select
4	SCLK	I	SPI CLK
5	SDI	I	SPI data input
6	SDO	O	SPI data output
7	IO1	I	General-purpose digital input
8	IO2	I	General-purpose digital input
9	VOUT	O	Demodulated echo analog output
10	VDD	P	Voltage regulator input
11	INN	I	Negative transducer receive
12	INP	I	Positive transducer receive
13	SGND	G	Sensor ground (quiet)
14	GND	G	Ground
15	OUTA	O	Transducer driver output A
16	OUTB	O	Transducer driver output B
17	VDRV	P	H-bridge driver supply voltage
18	FLT	I/O	Filter components
19	OUT4	O	General-purpose digital output
20	VPWR	P	Input supply voltage

(1) I = input, O = output, I/O = input and output, G = ground, P = power