Housing 0.4-mm pitch, 221-pin BGAs, the SG-BGA-7163 socket operates at frequencies up to 10 GHz with less than 1 dB of insertion loss. Typical contact resistance is 20 m? per I/O. Other features include an operating temperature range from -35°C to +100°C, a pin self inductance of 0.15 nH, mutual inductance of 0.025 nH, capacitance to ground of 0.01 pF, and a 2A current capacity. Single-unit price is $352. IRONWOOD ELECTRONICS, Burnsville, MN. (800) 404-0204.