6 Pin Configuration and Functions

Figure 6-1 ISOW7740 DFM Package 20-Pin SOIC-WB Top View

Figure 6-2 ISOW7741 DFM Package 20-Pin SOIC-WB Top View

Figure 6-3 ISOW7742 DFM Package 20-Pin SOIC-WB Top View

Figure 6-4 ISOW7743 DFM Package 20-Pin SOIC-WB Top View

Figure 6-5 ISOW7744 DFM Package 20-Pin SOIC-WB Top View

PIN						I/O	DESCRIPTION
NAME	NO.
NAME	ISOW7740	ISOW7741	ISOW7742	ISOW7743	ISOW7744
GNDIO	6	6	6	6	6	—	Ground connection for V_IO. GND1 and GNDIO needs to be shorted on board.
GND1	10	10	10	10	10	—	Ground connection for V_DD. GND1 and GNDIO needs to be shorted on board.
GND2	11	11	11	11	11	—	Ground connection for V_ISOOUT. GND2 and GISOIN pins can be shorted on board or connected through a ferrite bead. See the Layout Section for more information.
GISOIN	15	15	15	15	15	—	Ground connection for V_ISOIN. GND2 and GISOIN pins can be shorted on board or connected through a ferrite bead. See the Layout Section for more information.
INA	2	2	2	2	19	I	Input channel A
INB	3	3	3	18	18	I	Input channel B
INC	4	4	17	17	17	I	Input channel C
IND	5	16	16	16	16	I	Input channel D
OUTA	19	19	19	19	2	O	Output channel A
OUTB	18	18	18	3	3	O	Output channel B
OUTC	17	17	4	4	4	O	Output channel C
OUTD	16	5	5	5	5	O	Output channel D
EN_IO1	7	7	7	7	7	I	Output Enable 1: When EN_IO1 is high or open then the channel output pins on side 1 are enabled. When EN_IO1 is low then the channel output pins on side 1 are in a high impedance state and the transmitter of the channel input pins on side 1 are disabled.
EN_IO2	14	14	14	14	14	I	Output Enable 2: When EN_IO2 is high or open then the channel output pins on side 2 are enabled. When EN_IO2 is low then the channel output pins on side 2 are in a high impedance state and the transmitter of the channel input pins on side 2 are disabled.
EN/FLT	8	8	8	8	8	I/O	Multi-function power converter enable input pin or fault output pin. Can only be used as either an input pin or an output pin. Power converter enable input pin: enables and disables the integrated DC-DC power converter. Connect directly to microcontroller or through a series current limiting resistor to use as an enable input pin. DC-DC power converted is enabled when EN/FLT is high to the V_IO voltage level and disabled when low at GND1 voltage level. Fault output pin: Alert signal if power converter is not operating properly. This pin is active low. Connect to microcontroller through a 5 kΩ or greater pull-up resistor in order to use as a fault outpin pin. See Section 9.3.3 for more information
VSEL	13	13	13	13	13	I	V_ISOOUT selection pin. V_ISOOUT = 5 V when VSEL shorted to V_ISOOUT. V_ISOOUT = 3.3 V, when VSEL shorted to GND2. For more information see the Device Functional Modes.
V_IO	1	1	1	1	1	—	Side 1 logic supply.
V_DD	9	9	9	9	9	—	Side 1 DC-DC converter power supply.
V_ISOIN	20	20	20	20	20	—	Side 2 supply voltage for isolation channels. V_ISOIN and V_ISOOUT pins can be shorted on board or connected through a ferrite bead. See Section 10 for more information.
V_ISOOUT	12	12	12	12	12	—	Isolated power converter output voltage. V_ISOIN and V_ISOOUT pins can be shorted on board or connected through a ferrite bead. See Section 10 for more information.