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AS1751/AS1752/AS1753

8 Detailed Description

The AS1751/AS1752/AS1753 are low ON-resistance, low-voltage, quad analog SPST switches that operate from a

single +1.6 to +3.6V supply.

CMOS process technology allows switching of analog signals that are within the supply voltage range (GND to V+).

Figure 11. 16-pin TQFN Block Diagrams

ON-Resistance

When powered from a +3V supply, the low (0.9

Ω, max) ON-resistance allows high-speed, continuous signals to be

switched in a variety of applications.

Bi-Directional Switching

Pins NOx, NCx, and COMx are bi-directional, thus they can be used as inputs to- or outputs from other components.

Analog Signal Levels

Analog signals ranging over the entire supply voltage range (V+ to GND) can be switched with very little change in ON-

resistance (see Typical Operating Characteristics on page 6).

Logic Inputs

The devices’ logic inputs can be driven up to +3.6V regardless of the supply voltage value. For example, with a +1.8V

supply, INx may be driven low to GND and high to +3.6V. This allows the devices to interface with +3V systems using

a supply of less than 3V.

Table 6. Truth Tables

Device

Input

Switch State

AS1751

Low

Off

High

On

AS1752

Low

On

High

Off

AS1753

Low

Switches 1, 3 = Off

Switches 2, 4 = On

High

Switches 1, 3 = On

Switches 2, 4 = Off

AS1751

2

COM2

3

N/C

4

IN2

1

NO2

11

NO4

10

N/C

9

COM4

12

IN4

AS1752

2

COM2

3

N/C

4

IN2

1

NC2

11

NC4

10

N/C

9

COM4

12

IN4

AS1753

2

COM2

3

N/C

4

IN2

1

NC2

11

NC4

10

N/C

9

COM4

12

IN4