AS1741, AS1742, AS1743

High-Speed, Low-Volta ge, Single-Supply, 0.8

Ω,

Dual SPST Analog Switches

Dat a Sh eet

www.austriamicrosystems.com

Revision 1.78

1 - 15

1 General Description

The AS1741/AS1742/AS1743 are high-speed, low-volt-

age, dual single-pole/single-throw (SPST) 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 single +1.6

to +3.6V supply, and are differentiated by the type and

number of switches as listed in Table 1.

The AS1743 supports break-before-make switching.

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

gain switching networks.

The AS1741/AS1742/AS1743 digital logic input is 1.8V

CMOS-compatible when using a single +3V supply, and

all devices can handle Rail-to-Rail signals.

The devices are available in an 8-pin MSOP package

and an 8-pin SOT23 package.

Figure 1. MSOP Block Diagrams

2 Key Features

!

ON-Resistance:

-0.8

Ω (+3V supply)

-2.5

Ω (+1.8V supply)

!

Ω (+3V supply)

!

Ω (+3V supply)

!

Supply Voltage Range: +1.6 to +3.6V

!

!

Current-Handling: 250mA Continuous

!

Break-Before-Make Switching (AS1743)

!

Rail-to-Rail Signal Handling

!

1.8V CMOS Logic Compatible (+3V supply)

!

Total Harmonic Distortion: 0.03%

!

Operating Temperature Range: -40 to +85ºC

!

Package Types:

- 8-pin MSOP

- 8-pin SOT23

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,

hard drives, and any other application where high-speed

signal switching is required.

Table 1. Standard Products

Model

Switch Types

AS1741

Two Normally Open (NO) Switches

AS1742

Two Normally Closed (NC) Switches

AS1743

One NO Switch and One NC Switch

AS1741

AS1743

AS1742

NO1

COM1

IN2

GND

V+

IN1

COM2

NO2

NC1

COM1

IN2

GND

V+

IN1

COM2

NC2

NC2

V+

IN1

COM2

NO1

COM1

IN2

GND