Then 2N5564 /5565 /5566 are matched pars of sourced from mounted ina a TO - 71 package - THIS two - chips design reduces parasitics for good perfomance at high freuency whileensuring extremely tigh matching -this series features high breakd down voltage ( V (BR /DSS typically 2554),high gain ( typically 79 mS ), and < 5m V , offset between the die.
