MC1488 Quad Line EIA-232D Driver The MC1488 is a monolithic quad line driver designed to interface data terminal equipment with data communications equipment in conformance with the specifications of EIA Standard No. EIA232D. Features MC1488 V 14 CC 6.2 k 8.2 k Pins 4, 9, 12 or 2 Input Input Pins 5, 10, 13 70 300 Output Pins 6, 8, 11 or 3 3.6 k GND 7 10 k 7.0 k 70 V 1 EE Figure 2. Circuit Schematic (1/4 of Circuit Shown)