Package and layout — SOT-343F is not a generic SOT-23
SOT-343F surface-mount package, also designated as 4-DFP by the supplier.
DC bias and gain — what 90 hFE means at 2 V
DC current gain (hFE) is specified at 90 minimum at a collector current of 5 mA and a collector-emitter voltage of 2 V.
