SN75ALS170, SN75ALS170A TRIPLE DIFFERENTIAL BUS TRANSCEIVER

SLLS055D - AUGUST 1987 - REVISED SEPTEMBER 1995

features

Three Bidirectional Transceivers
Driver Meets or Exceeds ANSI Standard EIA/TIA-422-B and RS-485 and ITU Recommendation V.11
Two Skew Limits Available
Designed to Operate Up to 20 Million Data Transfers per Second (FAST-20 SCSI)
High-Speed Advanced Low-Power Schottky Circuitry
Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments
Wide Positive and Negative Input/Output Bus Voltage Ranges
Driver Output Capacity . . . ±60 mA
Thermal Shutdown Protection
Driver Positive- and Negative-Current Limiting
Receiver Input Impedances . . . 12 k Min
Receiver Input Sensitivity . . . ±300 mV Max
Receiver Input Hysteresis . . . 60 mV Typ
Operates From a Single 5-V Supply
Glitch-Free Power-Up and Power-Down Protection
Features Independent Direction Controls for Each Channel

description

The SN75ALS170 and SN75ALS170A triple differential bus transceivers are monolithic integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines and the driver meets ANSI Standards EIA/TIA-422-B and RS-485 and both the driver and receiver meet ITU Recommendation V.11. The SN75ALS170A 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 SN75ALS170 and SN75ALS170A operate from a single 5-V power supply. The drivers and receivers have active-high and active-low enables, respectively, which are internally connected together to function as a direction control. The driver differential outputs and the receiver differential inputs 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 V_CC = 0. These ports feature wide positive and negative common-mode voltage ranges making the device suitable for party-line applications.

The SN75ALS170 and the SN75ALS170A are characterized for operation from 0°C to 70°C.

Title: TRIPLE DIFFERENTIAL BUS TRANSCEIVER
Product Family: TRANSMITTERS AND RECEIVERS
Device Functionality: TRANSMITTERS/RECEIVERS
Orderable Devices: SN75ALS170DW, SN75ALS170DWR, SN75ALS170J, SN75ALS170ADW

View the complete PDF datasheet: slls055d.pdf (244 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN75ALS170, SN75ALS170A

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