DS36276 Datasheet | National Semiconductor

Description The DS36276 FAILSAFE Multipoint Transceiver is designed for use on bi-directional differential busses. It is patible with existing TIA/EIA-485 transceivers, however, it offers an additional feature not supported by standard transceivers. The FAILSAFE feature guarantees the receiver output to a known state when the Interface is in the following conditions: Floating Line, Idle Line (no active drivers), and Line Fault conditions (open or short). The receiver output is in a HIGH state for the following conditions: OPEN Inputs, Terminated Inputs (50Ω), and SHORTED Inputs. FAILSAFE is a highly desirable feature when the transceivers are used with Asynchronous Controllers such as UARTs. Features n FAILSAFE receiver, RO = HIGH for: - OPEN inputs - Terminated inputs - SHORTED inputs n patible with popular interface standards: - TIA/EIA-485 (RS-485) - TIA/EIA-422-A (RS-422-A) - CCITT Remendation V.11 n Bi-Directional Transceiver - Designed for multipoint transmission n Separate driver input, driver enable, receiver enable, and receiver output for maximum flexibility n Wide bus mon mode range - (- 7V to +12V) n Pin patible with: DS75176B, DS96176, DS3695 and SN75176A and B n Available in SOIC package Connection and Logic Diagram Truth Tables Driver Inputs RE X X X DE H H L DI H L X H L Z Outputs DO/RI DO /RI L H Z DS011383-1 Receiver Inputs RE L L H DE L L X RI- RI ≥0V ≤- 500 m V X Output RO H L Z Order Number DS36276M See NS Package Number M08A Receiver FAILSAFE Inputs RE L L H DE L L X RI- RI SHORTED OPEN X Output RO H H Z TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS011383 .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) 7V 5.5V Input Voltage (DE, RE , and DI) Driver Output Voltage/ Receiver Input Voltage -...