AS1744 , AS1745

High-Speed, Low-Volta ge, Dual, Single-Supply,

4

Ω, SPDT Analog Switches

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Dat a Sh eet

1 General Description

The AS1744/AS1745 are high-speed, low-voltage, dual

single-pole/double-throw (SPDT) analog switches.

Fast switching speeds, low ON-resistance, and low

power-consumption make these devices ideal for single-

cell battery powered applications.

These highly-reliable devices operate from a +1.8 to

+5.5V supply, are differentiated by inverted logic, and

support break-before-make switching.

flatness, the devices can accurately switch signals for

sample and hold circuits, digital filters, and op-amp gain

switching networks.

The devices are available in a 10-pin MSOP package

and a 10-pin TDFN package.

Figure 1. Block Diagrams

2 Key Features

!

ON-Resistance:

-4

Ω (+5V supply)

-5.5

Ω (+3V supply)

!

Ω (+5V supply)

!

Ω (+5V supply)

!

Supply Voltage Range: +1.8 to +5.5V

!

1.8V Operation:

-9.5

Ω ON-Resistance over Temperature

- 38ns Turn On Time

- 12ns Turn Off Time

!

Current-Handling: 100mA Continuous

!

Break-Before-Make Switching

!

Rail-to-Rail Signal Handling

!

Crosstalk: -90dB at 1MHz

!

Off-Isolation: -85dB at 1MHz

!

Total Harmonic Distortion: 0.1%

!

Operating Temperature Range: -40 to +85ºC

!

Package Types:

- 10-pin MSOP

- 10-pin TDFN

3 Applications

The devices are ideal for use in power routing systems,

cordless and mobile phones, MP3 players, CD and DVD

players, PDAs, handheld computers, digital cameras,

and any other application where high-speed signal

switching is required.

AS1744

AS1745

1

IN1

10

COM1

2

NO1

3

GND

5

IN2

4

NO2

9

NC1

8

V+

7

NC2

6

COM2

1

IN1

2

NC1

3

GND

5

IN2

4

NC2

10

COM1

9

NO1

8

V+

7

NO2

6

COM2

Truth Table

Switches shown for low input.

INx

NOx to

COMx

NCx to

COMx

Low

Off

On

High

On

Off