Camarillo, Calif. Semtech Corp. has expanded its MicroClamp family of ultra-small transient voltage suppressors (TVS) with the introduction of three new multi-line devices that are designed to protect critical circuits in cell phones, PDAs, digital music players and other portable electronic devices from electrostatic discharge (ESD).
The new MicroClamp devices include the μClamp0504A with protection for up to four unidirectional lines, the μClamp0505A with protection for up to five unidirectional lines or four bidirectional lines, and the μClamp0506A with protection for up to five bidirectional lines.
All MicroClamp devices feature a unique combination of low clamping voltage levels and small package size, which allows them to protect the most sensitive CMOS circuits while saving board space, said the company. With their 1.7 x 1.7 x 0.6 mm, six-lead SC-89 (SOT-666) package, the new MicroClamp devices occupy roughly half as much board space as competing solutions in an industry standard SC-70 package. The company says it can produce a compact footprint thanks to a proprietary manufacturing process that maintains clamping characteristics in a smaller package.
Each MicroClamp TVS offers ESD protection in excess of ±8kV contact, ±15kV air per IEC 61000-4-2 level 4 requirements, an industry ESD standard that must be met by mobile phone manufacturers. The devices are placed in between the protected circuit and the sources of potential ESD, including interfaces such as keyboards, LED drivers, battery chargers, or headphone connectors. During an ESD event, the TVS becomes a low-impedance path that protects the circuit by diverting harmful current to ground.
All MicroClamp devices feature leads with a lead-free matte finish that are compatible with lead-free lines as well as backward compatible with SnPb assembly operations.
Available in production quantities, the MicroClamp0504A is priced at $0.25 each; the MicroClamp0505A is priced at $0.26 each, and the MicroClamp0506A is priced at $0.28 each, in quantities of 1,000. Evaluation kits and samples are available by contacting sales @semtech.com
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