MC1489/MC1489A is a quad line receiver designed to interface data terminal equipment with data communications equipment in conformance with the specifications of EIA Standard N° RS232C.
The MC1489 and MC1489A are monolithic quad line receivers designed to interface data terminal equipment with data communications equipment in compliance with the EIA RS‑232C standard. They feature input resistance of 3 kΩ to 7 kΩ, built‑in hysteresis, and optional response‑control for threshold shifting and noise filtering.
Key specifications include a 10 V maximum supply voltage, ±30 V input range, 20 mA output load current, and typical propagation delays of 25 ns. The devices offer adjustable input thresholds via an external response‑control node and include detailed mechanical dimensions for tape‑and‑reel packaging.
| Power Supply Voltage (Vg) max | 10 V |
|---|---|
| Input Voltage Range (Vi) | ±30 V |
| Power Dissipation (Prot) | 1 W |
| Operating Ambient Temperature (Tamb) | up to 75 °C |
| Propagation Delay Time (typical) | 25 ns |
| Rise Time (typical) | 120 ns |
| Fall Time (typical) | 10 ns |
The MC1489 can accept input voltages from –30 V to +30 V.