HS-3182 ARINC 429 Bus Interface Line Driver Circuit


Posted on Feb 6, 2014

The HS-3182 is a monolithic dielectrically isolated bipolar differential line driver designed to meet the specifications of ARINC 429. This Device is intended to be used with a companion chip, HS-3282 CMOS ARINC Bus Interface Circuit, which provides the data formatting and processor interface function. All logic inputs are TTL and CMOS compatible.


HS-3182 ARINC 429 Bus Interface Line Driver Circuit
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In addition to the DATA (A) and DATA (B) inputs, there are also inputs for CLOCK and SYNC signals which are AND`d with the DATA inputs. This feature enhances system performance and allows the HS-3182 to be used with devices other than the HS-3182. Three power supplies are necessary to operate the HS-3182: +V = +15V ±10%, -V = -15V ±10%, and V1 = 5V ±5%. VREF is used to program the differential output voltage swing such that VOUT (DIFF) = ±2VREF. Typically, VREF = V1 = 5V ±5%, but a separate power supply may be used for VREF which should not exceed 6V. The driver output impedance is 75 ±20% at +25 °C. Driver output rise and fall times are independently programmed through the use of two external capacitors connected to the CA and CB inputs. Typical capacitor values are CA = CB = 75pF for high-speed operation (100kBPS), and CA = CB = 300pF for low-speed operation (12kBPS to 14. 5kBPS). The outputs are protected against overvoltage and short circuit as shown in the Block Diagram. The HS-3182 is designed to operate over an ambient temperature range of -55 °C to +125 °C, or -40 °C to +85 °C.




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