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LTC1485IS8 Datasheet(PDF) 5 Page - Linear Technology |
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LTC1485IS8 Datasheet(HTML) 5 Page - Linear Technology |
5 / 12 page 5 LTC1485 PI FU CTIO S RO (Pin 1): Receiver Output. If the receiver output is enabled (RE low), then if A > B by 200mV, RO will be high. If A < B by 200mV, then RO will be low. RE (Pin 2): Receiver Output Enable. A low enables the receiver output, RO. A high input forces the receiver output into a high impedance state. DE (Pin 3): Driver Output Enable. A high on DE enables the driver outputs, A and B. A low input will force the driver outputs into a high impedance state. DI (Pin 4): Driver Input. If the driver outputs are enabled (DE high), then a low on DI forces the driver outputs A low and B high. A high on DI will force A high and B low. GND (Pin 5): Ground Connection. A (Pin 6): Driver Output/Receiver Input. B (Pin 7): Driver Output/Receiver Input. VCC (Pin 8): Positive Supply. 4.75V ≤ VCC ≤ 5.25V. TEST CIRCUITS Figure 3. Receiver Timing Test Load 1k 1485 F03 CL S1 S2 1k VCC RECEIVER OUTPUT Figure 4. Driver Timing Test Load 1485 F04 CL S1 S2 500 Ω VCC OUTPUT UNDER TEST VOD2 A B R R VOC 1485 F01 DI RDIFF 1485 F02 DRIVER RECEIVER CL1 CL2 RO 15pF A B A B Figure 1. Driver DC Test Load Figure 2. Driver/Receiver Timing Test Circuit |
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