SN55109A, SN55110A, SN75109A, SN75110A, and SN75112 are dual line drivers with improved output current regulation and stability over supply voltage and temperature ranges, constant-current outputs, high speed, standard supply voltages, high output impedance, high common-mode output voltage range, TTL-input compatibility, inhibitor available for driver selection, glitch-free during power up/power down. SN75112 and external circuit meet or exceed the requirements of CCITT Recommendation V.35.
The SN55109A, SN55110A, SN75109A, SN75110A, and SN75112 are dual line drivers with improved output current regulation over supply voltage and temperature variations. They feature constant‑current outputs, TTL‑compatible inputs, and an enable/inhibit function for party‑line or data‑bus applications.
The document lists electrical characteristics such as supply voltage ranges, common‑mode output voltage, output current levels, absolute maximum ratings, and recommended operating conditions for various package types. Pin configurations, switching characteristics, typical performance curves, and a sample pulse‑control application circuit are also included.
| Nominal output current (SN55109A) | 6 mA |
|---|---|
| Nominal output current (SN55110A) | 12 mA |
| Nominal output current (SN75112) | 27 mA |
| Common‑mode output voltage range | -3 V to 10 V |
| Operating temperature (SN55109A/SN55110A) | -55 °C to 125 °C |
| Operating temperature (SN75109A/SN75110A/SN75112) | 0 °C to 70 °C |
| Power dissipation (D package) | 950 mW |
The SN55109A provides a nominal output current of 6 mA.
The drivers support a common‑mode voltage range from –3 V to 10 V.
The SN55109A is rated for operation from –55 °C to 125 °C.