AS1742G-T

Analog Switches, Multiplexers, Demultiplexers Overview

The AS1742G-T is a high-speed, low-voltage analog switch manufactured by ams-OSRAM USA INC. It features dual single-pole/single-throw (SPST) switches with Normally Closed (NC) contacts. The device operates on a single supply voltage ranging from +1.6V to +3.6V. Key electrical parameters include an ON-resistance of 0.8Ω at +3V and 2.5Ω at +1.8V, with RON matching of 0.08Ω and flatness of 0.18Ω at +3V. Switching times are tON = 22ns and tOFF = 14ns at +3V. It handles continuous current up to 250mA and supports rail-to-rail signal handling. The component is housed in an 8-pin MSOP package.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Dual SPST configuration with Normally Closed (NC) switching logic
• Low ON-resistance optimized for single-cell battery applications
• Rail-to-Rail signal handling capability across the full supply range
• 1.8V CMOS logic compatible when powered by a +3V supply

Analog Switches, Multiplexers, Demultiplexers Applications

• Power routing systems
• Cordless and mobile phones
• MP3 players and portable audio devices
• Digital cameras and handheld computers

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific ordering suffix 'T' corresponds to the Tape and Reel delivery form as documented in the manufacturer's ordering information table. Confirm that the 8-pin MSOP package type matches the design requirements. Ensure compatibility with the +1.6V to +3.6V single-supply operation constraints during system integration.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this model specifically for its Normally Closed (NC) contact configuration, distinguishing it from the NO variants in the series. Evaluate the 0.8Ω ON-resistance at +3V against circuit loss requirements. Consider the 8-pin MSOP footprint for board space constraints. Verify that the 250mA continuous current rating meets the load demands of the intended application.

Analog Switches, Multiplexers, Demultiplexers Part Context

The AS1742G-T belongs to the AS174x family of high-speed analog switches, which also includes the AS1741 (NO) and AS1743 (mixed). These devices share identical electrical characteristics and packaging options but differ in their internal switch contact states. The G-T suffix indicates the standard MSOP package delivered in tape and reel format for automated assembly.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct functional substitutes within the same family include the AS1741G-T (Normally Open) and AS1743G-T (Mixed NO/NC), provided the contact state aligns with the circuit design. Other packages such as SOT23 (AS1742H-T) offer pin-compatible alternatives if different footprints are required.