Datasheet
ADG2128 Data Sheet
Rev. D | Page 10 of 28
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
05464-003
Y2
Y4
Y3
Y6
Y7
Y1
Y0
Y5
NC
V
DD
X11
X10
X9
X8
X7
X6
X3
X1
X0
NC
X5
X4
X2
V
SS
RESET
A1
SCL
A2
A0
SDA
GND
V
L
1
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 13 14 15 1612
PIN 1
INDICATOR
ADG2128
12 × 8
TOP VIEW
(Not to Scale)
NOTES
1. THE EXPOSED PADDLE IS SOLDERED TO V
SS
.
2. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 3. Pin Configuration
Table 5. Pin Function Descriptions
1
Pin No. Mnemonic Description
1 V
SS
Negative Power Supply in a Dual-Supply Application. For single-supply applications, this pin should be tied to GND.
2, 23 NC This pin is not connected internally (see Figure 3).
3 to 8,
17 to 22
X0 to X11
Can be inputs or outputs.
9 to 16 Y0 to Y7 Can be inputs or outputs.
24 V
DD
Positive Power Supply Input.
25 V
L
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 ADG2128.
EPAD Exposed Pad. The exposed paddle is soldered to V
SS
.
1
It is recommended that the exposed paddle be soldered to V
SS
to improve heat dissipation and crosstalk.