ADG2108

Rev. 0 | Page 10 of 28

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

NC = NO CONNECT

NC

X9

X8

X7

X6

X5

X4

X1

NC

NC

NC

X3

X2

X0

2

3

4

5

6

7

8

32

31

30

29 28

27

26

25

24

23

22

21

20

19

18

17

9

10

11

13141516

12

PIN 1

INDICATOR

ADG2108

10 × 8

TOP VIEW

(Not to Scale)

Figure 3. Pin Configuration

Table 5. Pin Function Descriptions1

Pin No.

Mnemonic

Description

1

Negative Power Supply in a Dual-Supply Application. For single-supply applications, this pin

should be tied to GND.

2 to 4, 23

NC

No Connect.

5 to 8,

17 to 22

X0 to X9

Can be inputs or outputs.

9 to 16

Y0 to Y7

Can be inputs or outputs.

24

Positive Power Supply Input.

25

Logic Power Supply Input.

26

SDA

Digital I/O. Bidirectional open drain data line. External pull-up resistor required.

27

SCL

Digital Input, Serial Clock Line. Open drain input that is used in conjunction with SDA to clock data

into the device. External pull-up resistor required.

28

A0

Logic Input. Address pin that sets the least significant bit of the 7-bit slave address.

29

A1

Logic Input. Address pin that sets the second least significant bit of the 7-bit slave address.

30

A2

Logic Input. Address pin that sets the third least significant bit of the 7-bit slave address.

31

RESET

Active Low Logic Input. When this pin is low, all switches are open, and appropriate registers are cleared to 0.

32

GND

Ground. Reference point for all circuitry on the ADG2108.