The OH100 OCVCXO model is a one square inch hermetically sealed, through-hole, resistance-welded package with a grounded case. Including the glass standoffs, it stands less than ½ inch off the board. The 5 pin arrangement is a standard in the industry. The pin connections are as follows: Pin 1: Output, Pin 2: Ground, Pin 3: Control Voltage or No-Connect, Pin 4: No-Connect, Pin 5: Supply Voltage. All OCXO product labels are bar coded.