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ST releases low-capacitance ESD protection

Posted: 10 Mar 2006     Print Version  Bookmark and Share

Keywords:ESD protection  USBLC6-2P6  USBLC6-2SC6  USB 2.0  STMicroelectronics 

STMicroelectronics has introduced a low capacitance ESD protection device—available in a tiny SOT-666 package as well as in the SOT-23—which protects the two data lines and the power rail of a USB 2.0 high-speed interface. According to the company, the 2.5pF (typical) line capacitance of the USBLC6-2P6 (SOT-666) and USBLC6-2SC6 (SOT-23) ensures no distortion of the 480Mbps USB 2.0 signal; the chips also protect against ESD up to the IEC61000-4-2 level 4, 15kV standard.

The product's leakage current is 15A maximum, and is said to be the first USB 2.0 protective device to be available in the SOT-666 package, which requires only 2.9mm2 of board area, making it an option for compact, portable, battery powered products. It provides full D+/D- signal balance, with I/O-to-ground matching tolerance of 0.04pF.

The ESD protection of VCC allows the current to flow to ground when an ESD event occurs on a data line; the data lines are protected by a rail-to-rail topology, while VCC protection is by clamping.

The introduction of the USBLC6 is said to reflect the increasing use of higher data rates for interfaces in computer and consumer electronics. As well as USB 2.0 and USB OTG (USB On-The-Go), it is backwards compatible with USB 1.0 and 1.1 (low and full speed), and is also suitable for protecting 10/100Mbps Ethernet ports, cellphone SIM cards and video lines.

The USBLC6-2P6 (SOT-666 package) and USBLC6-2SC6 (SOT-23 package) are available now in sample quantities. Pricing is Rs.8.85 (20 cents) and Rs.7.08 (16 cents), respectively, in volume quantities of 10 lakh (a million) units.

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