The DS9627 is a dual-line receiver which meets the electrical interface specifications of EIA RS-232C and MIL-STD-188C. The input circuitry accommodates 25V input signals and the differential inputs allow user selection of either inverting or non-inverting logic for the receiver operation. The DS9627 provides both a selectable hysteresis range and selectable receiver input resistance. When pin 1 is tied to V-, the typical switching points are at 2.6V and -2.6V, thus meeting RS-232-C requirements. When pin 1 is open, the typical switching points are at 50 A and -50 A, thus satisfying the requirements of MIL-STD-188C LOW level interface. Connecting the RA and/or RB pins to the (-) input yields an input impedance in the range of 3 k to 7 k and satisfies RS-232-C requirements; leaving RA and/or RB pins unconnected, the input resistance will be greater than 6 k to satisfy MIL-STD-188C.