The Intersil ISL43120, ISL43121 and ISL43122 devices are

precision, bidirectional, dual analog SPST switches designed to

operate from a single +2.7V to +12V supply. Targeted

applications include battery powered equipment that benefit

from the devices’ low power consumption (5µW), low leakage

currents (100pA max) and fast switching speeds (tON = 28ns,

tOFF = 20ns). Cell phones, for example, often face ASIC

functionality limitations. The number of analog input or GPIO

pins may be limited and digital geometries are not well suited to

analog switch performance. This family of parts may be used to

“mux-in” additional functionality while reducing ASIC design

risk. Some of the smallest packages are available, alleviating

board space limitations and making Intersil’s newest line of

low-voltage switches an ideal solution.

The ISL43120, ISL43121, ISL43122 are dual

single-pole/single-throw (SPST) devices. The ISL43120 has

two normally open (NO) switches; the ISL43121 has two

normally closed (NC) switches; the ISL43122 has one NO and

one NC switch and can be used as an SPDT.

Features

• Fully specified at 12V, 5V, and 3.3V supplies for 10

tolerances

• ON-resistance (rON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Ω

• rON matching between channels . . . . . . . . . . . . . . . . . . . . . . . <1Ω

• Low charge injection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5pC (Max)

• Single supply operation . . . . . . . . . . . . . . . . . . . . . . +2.7V to +12V

• Low power consumption (PD) . . . . . . . . . . . . . . . . . . . . . . . . .<5µW

• Low leakage current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10nA

• Fast switching action

- tON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28ns

- tOFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20ns

• Guaranteed break-before-make (ISL43122 only)

• Minimum 2000V ESD protection per method 3015.7

• TTL, CMOS compatible

• Available in SOT-23 packaging

• Pb-free (RoHS Compliant)

Applications

• Battery-powered, handheld and portable equipment

- Cellular/mobile phones

- Pagers

- Laptops, notebooks, palmtops

• Communications systems

- Radios, ADSL Modems

- PBX, PABX

• Test and measurement equipment

- Ultrasound

- Computerized Tomography (CT) Scanner

- Magnetic Resonance Image (MRI)

- Position Emission Tomography (PET) Scanner

- Electrocardiograph

• Heads-up displays

• Audio and video switching

• Various circuits

- +3V/+5V DACs and ADCs

- Sample and hold circuits

- Digital filters

- Operational amplifier gain switching networks

- High frequency analog switching

- High speed multiplexing

- Integrator reset circuits