SN75ALS181 DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152 - DECEMBER 1992

features

• Meets EIA Standards RS-422-A, RS-485, and CCITT Recommendations V.11 and X.27
• Low Supply Current Requirements 30 mA Max
• Driver Output Capacity...±60 mA
• Thermal Shutdown Protection
• Driver Common-Mode Output Voltage Range of -7 V to 12 V
• Receiver Input Impedance...12 kΩ Min
• Receiver Input Sensitivity...±200 mV
• Receiver Input Hysteresis...60 mV Typ
• Receiver Common-Mode Input Voltage Range of ±12 V
• Operates From Single 5-V Supply
• Glitch-Free Power-Up and Power-Down Protection

description

The SN75ALS181 differential driver and receiver pair are monolithic integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. The design provides for balanced transmission lines and meets EIA Standards RS-422-A and RS-485, and CCITT recommendations V.10, V.11, X.26, and X.27.

The SN75ALS181 combines a 3-state differential line driver and a differential input line receiver that operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, which can be externally connected together to function as a direction control. The driver differential outputs and the receiver differential inputs are connected to separate pins for greater flexibility and 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 changes making the device suitable for party-line applications.

The SN75ALS181 is characterized for operation from 0°C to 70°C.

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

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