Catalog
Triple Differential Bus Transceiver
Key Features
• Three Bidirectional TransceiversDriver Meets or Exceeds the Requirements of ANSI EIA/TIA-422-B and RS-485 and ITU Recommendation V.11Two Skew Limits AvailableDesigned to Operate Up to 20 Million Data Transfers per Second (FAST-20 SCSI)High-Speed Advanced Low-Power Schottky CircuitryLow Pulse Skew...5 ns MaxDesigned for Multipoint Transmission on Long Bus Lines in Noisy EnvironmentsFeatures Independent Driver Enables and Combined Receiver EnablesWide Positive and Negative Input/Output Bus Voltages RangesDriver Output Capacity...±60 mAThermal Shutdown ProtectionDriver Positive- and Negative-Current LimitingReceiver Input Impedances...12 kMinReceiver Input Sensitivity...±300 mV MaxReceiver Input Hysteresis...60 mV TypOperates From a Single 5-V SupplyGlitch-Free Power-Up and Power-Down ProtectionThree Bidirectional TransceiversDriver Meets or Exceeds the Requirements of ANSI EIA/TIA-422-B and RS-485 and ITU Recommendation V.11Two Skew Limits AvailableDesigned to Operate Up to 20 Million Data Transfers per Second (FAST-20 SCSI)High-Speed Advanced Low-Power Schottky CircuitryLow Pulse Skew...5 ns MaxDesigned for Multipoint Transmission on Long Bus Lines in Noisy EnvironmentsFeatures Independent Driver Enables and Combined Receiver EnablesWide Positive and Negative Input/Output Bus Voltages RangesDriver Output Capacity...±60 mAThermal Shutdown ProtectionDriver Positive- and Negative-Current LimitingReceiver Input Impedances...12 kMinReceiver Input Sensitivity...±300 mV MaxReceiver Input Hysteresis...60 mV TypOperates From a Single 5-V SupplyGlitch-Free Power-Up and Power-Down Protection
Description
AI
The SN75ALS171 and the SN75ALS171A triple differential bus transceivers are monolithic integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines, and each driver meets ANSI Standards EIA/TIA-422-B and RS-485 and both the drivers and receivers meet ITU Recommendation V.11. The SN75ALS171A is designed for FAST-20 SCSI and can transmit or receive data pulses as short as 30 ns with a maximum skew of 5 ns.
The SN75ALS171 and the SN75ALS171A operate from a single 5-V power supply. The drivers and receivers have individual active-high and active-low enables, respectively, which can be externally connected together to function as a direction control. The driver differential output and the receiver differential input pairs are connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus when the driver is disabled or VCCis at 0 V. These ports feature wide positive and negative common-mode voltage ranges making the device suitable for party-line applications.
The SN75ALS171 and the SN75ALS171A are characterized for operation from 0°C to 70°C.
H = high level, L = low level, ? = indeterminate, X = irrelevant,Z = high impedance (off)
The SN75ALS171 and the SN75ALS171A triple differential bus transceivers are monolithic integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines, and each driver meets ANSI Standards EIA/TIA-422-B and RS-485 and both the drivers and receivers meet ITU Recommendation V.11. The SN75ALS171A is designed for FAST-20 SCSI and can transmit or receive data pulses as short as 30 ns with a maximum skew of 5 ns.
The SN75ALS171 and the SN75ALS171A operate from a single 5-V power supply. The drivers and receivers have individual active-high and active-low enables, respectively, which can be externally connected together to function as a direction control. The driver differential output and the receiver differential input pairs are connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus when the driver is disabled or VCCis at 0 V. These ports feature wide positive and negative common-mode voltage ranges making the device suitable for party-line applications.
The SN75ALS171 and the SN75ALS171A are characterized for operation from 0°C to 70°C.
H = high level, L = low level, ? = indeterminate, X = irrelevant,Z = high impedance (off)
