STMicroelectronics announced devices that combine EMI filtering and ESD protection in a single package, enabling system designers to implement both functions within a footprint of 0.6mm2. Two devices have been announced, meeting IEC61000-4-2 level 4 for ESD protection and also having line-to-ground capacitance of 30pF to preserve high-speed signal integrity. Filter characteristics include high attenuation in the GSM band, enabling enhanced performance when protecting the keypad, side keys, external connectors or data lines in smart phones, PDAs, portable computers, PC peripherals and M2M communication modules.
The smallest component introduced is the EMIF01-1003M3 for single-line applications. It is housed in a 0.6mm-high SOT883 package with a 1.0 x 0.6mm footprint. The EMIF02-1003M6 is a two-channel device in a 1.0 x 1.45mm Micro QFN 6-lead package. Both devices achieve 15kV air discharge and 8kV contact discharge, in accordance with the IEC61000-4-2 specification. Clamping performance is also robust thanks to the internal Pi-protection structure, with 9V clamping voltage for the EMIF01 and 17V for the EMIF02, when subjected to a 15kV ESD strike.
A series resistance of 100 Ohms and leakage current of 100nA minimizes energy losses during normal circuit operation. The EMIF01-1003M3 and EMIF02-1003M6 are available now, in units of 100,000 upwards, at a price of $0.09 and $0.15, respectively.