The 100314 is a monolithic quint differential line receiver with emitter-follower outputs. An internal reference supply (VBB) is available for single-ended reception. When used in single-ended operation the apparent input threshold of the true inputs is 25 mV to 30 mV higher (positive) than the threshold of the complementary inputs. Unlike other F100K ECL devices, the inputs do not have input pull-down resistors. Active current sources provide common-mode rejection of 1.0V in either the positive or negative direction. A defined output state exists if both inverting and non-inverting inputs are at the same potential between VEE and VCC. The defined state is logic HIGH on the Oa-Oe outputs.