Product category:
Analogue and Mixed Signal ICs
News Release from: Fairchild Semiconductor | Subject: NC7SB3157 and NC7SZ66 switches
Edited by the Electronicstalk Editorial
Team on 04 September 2001
Industry's smallest analogue switches
Fairchild Semiconductor has put a new family of analogue switches in its space-saving MicroPak IC packages, making them 65% smaller than current SC70 packages.
Fairchild Semiconductor has put a new family of analogue switches in its space-saving MicroPak IC packages, making them 65% smaller than current SC70 packages Designed for switching analogue and digital signals, the new analogue switches are ideal for use in space limited designs of portable electronic devices including 2G and 3G cellphones, MP3 players, CD players and notebook computers
This article was originally published on Electronicstalk on 28 Feb 2001 at 8.00am (UK)
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There are two initial devices, and more are due by year-end 2001.
The NC7SB3157, is a single-pole double-throw (SPDT) switch; the NC7SZ66 is a single version of a single-pole single-throw (SPST) switch.
These are also available in 6-pin SC70 and SOT23 packages.
The analogue switches operate over a 1.65 to 5.5V supply-voltage range used by most portable devices, and rail-to-rail operation avoids clipping analogue signals at VCC and ground to ensure signal integrity.
The devices exhibit low 3ohm ON-resistance and sub-6ns enable/disable times.
Designed for high-bandwidth applications, the switches pass signals of over 250MHz to permit versatile routing of analogue audio signals as well as digital, clock signals with minimal propagation delay.
Lead-free MicroPak is environmentally friendly, and its 1.0 x 1.45mm footprint readily permits last-minute design changes and upgrades surrounding ASICs.
MicroPak also offers the advantages of inspectable and visible solder joints, and requires no underfill.
Analogue switches are used to multiplex two voltage-controlled oscillators (VCOs), to select between fast and slow clocks to saving CPU power, to interchange speaker and audio-jack signals on cellphones, PDAs and notebooks, or to alternate discrete impedance values that change an op-amp's gain or filter frequencies.
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