| Number of receivers | 2 |
| Number of transmitters | 2 |
| Duplex | Full |
| Supply voltage (Nom) (V) | 5 |
| Signaling rate (Max) (Mbps) | 10 |
| IEC 61000-4-2 contact (+/- kV) | None |
| Fault protection (V) | -10 to 15 |
| Common mode range | -7 to 12 |
| Number of nodes | 32 |
| Isolated | No |
| ICC (Max) (mA) | 110 |
| Rating | Catalog |
| Operating temperature range (C) | -20 to 85, 0 to 70 |
- Meet or Exceed the Requirements of ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.10 and V.11
- Designed for Multipoint Bus Transmission on Long Bus Lines in Noise Environments
- Driver Positive- and Negative-Current Limiting
- Thermal Shutdown Protection
- Driver 3-State Outputs
- Receiver Common-Mode Input Voltage Range of -12 V to 12 V
- Receiver Input Sensitivity...±200 mV
- Receiver Hysteresis...50 mV Typ
- Receiver Input Impedance...12k
Min - Receiver 3-State Outputs (SN751177 Only)
- Operate From Single 5-V Supply
The SN751177 and SN751178 dual differential drivers and receivers are monolithic integrated circuits that are designed for balanced multipoint bus transmission at rates up to 10 Mbit/s. They are designed to improve the performance of full-duplex data communications over long bus lines and meet ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.10 and V.11.
The SN751177 and SN751178 driver outputs provide limiting for both positive and negative currents and thermal-shutdown protection from line-fault conditions on the transmission bus line.
The receiver features high input impedance of at least 12k , an input sensitivity of ±200 mV over a common-mode input voltage range of -12 V to 12 V, and typical input hysteresis of 50 mV. Fail-safe design ensures that if the receiver inputs are open, the receiver outputs always will be high.
The SN751177 and SN751178 are characterized for operation from -20°C to 85°C.
