Analog switch packaging shrinks

Unterpremstaetten, Austria — Austriamicrosystems AG repackaged its high-performance switch family for a 40 percent size reduction.

Austriamicrosystems' AS1741, AS1742, and AS1743 switches are now being offered in an 8-pin SOT23 package, in addition to its original 8-pin MSOP package.
Going from a 5 x 3-mm MSOP to a 3 x 3-mm SOT23 package, in combination with low power consumption, low on-resistance (R)ON and fast switching speed, makes these devices practical for portable battery-powered applications like mobile phones, MP3, CD/DVD and video players, digital cameras, and personal digital assistants (PDAs), the company said. The power routing performance enabled by the low R(ON) of 0.8 ohms also makes these switches suited for low-ohm speakers and headsets.

Additionally, the analog switches are said to offer a 40 percent switching time improvement over competing devices, while maintaining low (R)ON flatness and channel matching. The devices allow for switching of currents up to 250 milliamps.

Via an improved bandwidth of 130 MHz, the high-speed, dual, single-pole, single-throw (SPST) switches offer a wide supply voltage range of 1.6 V to 3.6 V. All digital logic inputs are 1.8-V CMOS compatible.

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These switches are available as two normally open (AS1741), two normally closed (AS1742) and a combination of one open and one closed switch (AS1743). They are drop-in replacements for Maxim's MAX4741, MAX4742 and MAX4743, according to Austriamicrosystems.

The AS1741-43 family is priced at 79 cents each in 1,000-unit quantities. Click here for the AS1741-43 data sheets.

Austriamicrosystems , 1-919-676-5292,

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