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Analog switches deliver low on-resistance, low leakage

Malvern, Pa. —Vishay Intertechnology, Inc. has released five low-impedance, high-voltage analog switches with on-resistance as low as 10 ohms for audio, video, and data switching applications.

The new devices include the dual-supply single-pole/single-throw (SPST)
DG467, DG468, DG447, and DG448 devices and the single-pole/double-throw (SPDT)
DG449. By combining low on-resistance (10 ohms for the DG467 and DG468
and 25 ohms for the DG447 and DG448) and low leakages with a compact size,
the devices are suitable as improved drop-in replacements for MAX4647, MAX4648, and MAX4649 analog switches, said Vishay.

Typical applications include high-speed, low-error switching, routing, and data acquisition in precision test equipment, instrumentation, communications systems, PBX and PABX systems, audio equipment, relay replacement, redundant telecom systems, PC multimedia boards, and hard disk drives.

The DG447 and DG467 SPST switches are normally closed, while the DG448 and
DG468 SPST switches are normally open. The DG449 is an SPDT switch with one
normally open contact and one normally closed contact. The devices operate
either from a single +7-V to 36-V supply or from dual +/-4.5-V to +/-20-V
supplies.

The SPDT DG449 is optimized for switching video in board- and system-level
devices. With its 38-ohm on-resistance, it reduces the switching losses to less than 0.5 dB and eliminates the need to adjust op amp gain settings, said Vishay.

All the devices provide a wide +/-15-V analog signal range and offer simple interfacing by eliminating the need for a VL logic supply. The devices feature rail-to-rail signal handling and are TTL and CMOS input compatible. Click here for the device specification table.

Pricing: $0.95 each for the DG447, DG448, and DG449; $0.45 for the DG467; and $0.55 for the DG468 for U.S. delivery in quantities of 1,000.
Availability: Samples and production quantities are available now, with lead times of eight to 10 weeks for larger orders.
Datasheets: DG447 and DG448, DG449 and
DG467 and DG468

Vishay Intertechnology , 1-619-336-0860, www.vishay.com

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