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AS1741 Dual 0.8? SPST Switch0 pages
AS1741, AS1742, AS1743
D a ta S he e t
H i g h - Sp e e d , L o w - Vo l ta g e , S i n g l e - S u p p l y, 0 . 8Ω,
Dual SPST Analog Switches
1 General Description
2 Key Features
The AS1741/AS1742/AS1743 are high-speed, low-voltage, dual single-pole/single-throw (SPST) analog
switches.
Fast switching speeds, low ON-resistance, and low
power-consumption make these devices ideal for singlecell battery powered applications.
!
ON-Resistance:
- 0.8Ω (+3V supply)
- 2.5Ω (+1.8V supply)
AS1742
AS1743
One NO Switch and One NC Switch
Switching Action: tON = 22ns, tOFF = 14ns
Current-Handling: 250mA Continuous
Break-Before-Make Switching (AS1743)
!
Two Normally Closed (NC) Switches
Supply Voltage Range: +1.6 to +3.6V
!
Two Normally Open (NO) Switches
!
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
Switch Types
AS1741
RON Flatness: 0.18Ω (+3V supply)
!
Model
!
!
Table 1. Standard Products
RON Matching: 0.08Ω (+3V supply)
!
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.
With very low ON-resistance (RON), RON matching, and
RON flatness, the devices can accurately switch signals
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.
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.
Figure 1. MSOP Block Diagrams
AS1741
NO1
COM1
IN2
GND
AS1742
V+
IN1
COM2
NO2
www.austriamicrosystems.com
NC1
AS1743
V+
COM1
IN1
IN2
COM2
GND
NC2
Revision 1.78
NO1
COM1
IN2
GND
V+
IN1
COM2
NC2
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