(China (Mainland))
Product Summary
The 75ALS181 is a differential driver and receiver pair designed for bidirectional data communication on multipoint bus transmission lines. The design provides for balanced transmission lines and meets TIA/EIA-422-B and TIA/EIA-485-A, and CCITT recommendations V.10, V.11, X.26, and X.27. The 75ALS181 combines a 3-state differential line driver and a differential-input line receiver that operate from a single 5-V power supply. The 75ALS181 has active-high and active-low enables, respectively, that can be connected together externally 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 VCC = 0. These ports feature wide positive and negative common-mode voltage changes, making the device suitable for party-line applications.
Parametrics
75ALS181 absolute maximum ratings: (1)Supply voltage, VCC: 7 V; (2)Input voltage, D, DE, and RE inputs: 7 V; (3)Output voltage range, driver: –9 V to 14 V; (4)Input voltage range, receiver: –14 V to 14 V; (5)Receiver differential input voltage range: –14 V to 14 V; (6)Package thermal impedance, θJA (see Notes 3 and 4): N package 80℃/W NS package 76℃/W; (7)Operating virtual junction temperature, TJ: 150℃; (8)Lead temperature 1,6 mm (1/16 inch)from case for 10 seconds: 260℃; (9)Storage temperature range, Tstg: –65℃ to 150℃.
Features
75ALS181 features: (1)Meets TIA/EIA-422-B, TIA/EIA-485-A, and; (2)CCITT Recommendations V.11 and X.27; (3)Low Supply-Current Requirements . 30 mA Max; (4)Driver Output Capacity . ±60 mA; (5)Thermal Shutdown Protection; (6)Driver Common-Mode Output Voltage Range of –7 V to 12 V; (7)Receiver Input Impedance . 12 kΩ Min; (8)Receiver Input Sensitivity . ±200 mV; (9)Receiver Input Hysteresis . 60 mV Typ; (10)Receiver Common-Mode Input Voltage Range of ±12 V; (11)Operates From Single 5-V Supply; (12)Glitch-Free Power-Up and Power-Down Protection.
Diagrams
