The MC1489 monolithic quad line receivers are designed to interface data terminal equipment with data communications equipment in conformance with the specifications of EIA Standard No. EIA–232D.

• Input Resistance – 3.0 k to 7.0 kΩ
• Input Signal Range – ± 30 V
• Input Threshold Hysteresis Built In
• Response Control
   a) Logic Threshold Shifting
   b) Input Noise Filtering