双路差动驱动器和接收 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
description
The SN75ALS1177 and SN75ALS1178 dual differential drivers and receivers are integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines and meet standards A/EIA-422-B and TIA/EIA-485-A.
• Meet or Exceed Standards TIA/EIA-422-B and TIA/EIA-485-A
• Designed for Multipoint Bus Transmission on Long Bus Lines in Noisy Environments
• Low Supply-Current Requirement 50 mA Max
• Driver Positive- and Negative-Current Limiting
• Driver Common-Mode Output Voltage Range of –7 V to 12 V
• Thermal Shutdown Protection
• Driver 3-State Outputs Active-High Enable
• Receiver Common-Mode Input Voltage Range of –12 V to 12 V
• Receiver Input Sensitivity . . . ±200 mV
• Receiver Hysteresis . . . 50 mV Typ
• Receiver High Input Impedance . . . 12 kΩ Min
• Receiver 3-State Outputs Active-Low Enable for SN75ALS1177 Only
• Operate From Single 5-V Supply
