Linear Technology LTC1067-50CS#TR Filter Type: Universal Switched Capacitor Frequency - Cutoff Or Center: 40kHz Max-order: 4th Mounting Type: Surface Mount Number Of Filters: 2 Package / Case: 16-SOIC (3.9mm Width) Series: * Voltage - Supply: 2.7 V ~ 11 V, ?±2.7 V ~ 5.5 V