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LTC1484CS8 Datasheet(PDF) 9 Page - Linear Technology |
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LTC1484CS8 Datasheet(HTML) 9 Page - Linear Technology |
9 / 16 page 9 LTC1484 PIN FUNCTIONS A (Pin 6): Driver Output/Receiver Input. The input resis- tance is typically 22k when the driver is disabled (DE = 0). When the driver is enabled, the A output follows the logic level at the DI pin. B (Pin 7): Driver Output/Receiver Input. The input resis- tance is typically 22k when the driver is disabled (DE = 0). When the driver is enabled, the B output is inverted from the logic level at the DI pin. VCC (Pin 8): Positive Supply. 4.75V ≤ VCC ≤ 5.25V. A 0.1µF bypass capacitor is recommended. Driver INPUTS OUTPUTS RE DE DI B A X1 1 0 1 X1 0 1 0 O0 X Z Z 10 X Z* Z* FU CTIO TABLES Receiver INPUTS OUTPUTS RE DE A – B RO 00 ≥VTH(MAX) 1 00 ≤VTH(MIN) 0 0 0 Inputs Open 1 0 0 Inputs Shorted 1 1X X Z† TEST CIRCUITS OUTPUT UNDER TEST CL S1 S2 VCC 500 Ω 1484 F05 OUTPUT UNDER TEST CRL 1k S1 S2 VCC 1k 1484 F03 Figure 3 Figure 5 DE RE A B DI CL1 RDIFF CL2 RO 15pF A B 1484 F04 Figure 4 Note: Z = high impedance, X = don’t care *Shutdown mode for LTC1484 †Shutdown mode for LTC1484 if DE = 0. Table valid with or without termination resistors. VOD1 VOD2 A B R R VOC 1484 F01 Figure 1 VOD3 A B 375 Ω 375 Ω 60 Ω –7V TO 12V 1484 F02 Figure 2 |
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