SN75ALS170 - 三路差动总线收发器

SN75ALS170是TI德州仪器公司的一款SCSI并行接口(SPI)产品，SN75ALS170是三路差动总线收发器，本站介绍了SN75ALS170的封装应用图解、特点和优点、功能等，并给出了与SN75ALS170相关的TI元器件型号供参考。

SN75ALS170 - 三路差动总线收发器 - SCSI并行接口(SPI) - SCSI终端、收发器 - 德州仪器

产品描述

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 VCC = 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.

H = high level, L = low level, ? = indeterminate, X = irrelevant, Z = high impedance (off)

产品特性

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
Operate From a Single 5-V Supply
Glitch-Free Power-Up and Power-Down Protection
Feature Independent Direction Controls for Each Channel

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