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MAX483MAX487 Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX483MAX487 Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 18 page Transformer Driver for Isolated RS-485 Interface C3 0.1µF C2 22µF ISO 5V ISOLATION BARRIER 5V VIN 1 8 5 C1 0.1µF 1N5817 MAX253 D1 D2 GND1 GND2 VCC 6 27 N.C. SD 4 ON / OFF 10 x PC417 *74HC04 OR EQUIVALENT ** SEE TABLE 2 MAX205 EN SD C4 22µF 82 1N5817 MAX667 5 64 SHDN SET GND IN OUT 390 Ω 83 T1IN T1OUT 390 Ω *74HC04 T1IN 1 2 4 5 6 1 2 4 5 6 390 Ω 74HC04 T2IN 390 Ω 74HC04 T3IN 390 Ω 74HC04 T4IN 390 Ω 74HC04 T5IN 74HC04 R1OUT 74HC04 74HC04 74HC04 74HC04 R2OUT R3OUT R4OUT R5OUT 5 X 3.3k Ω 390 Ω 390 Ω 390 Ω 390 Ω 74 T2IN T2OUT 15 2 T3IN T3OUT 16 1 T4IN T4OUT 22 19 T5IN T5OUT 910 R1OUT R1IN 65 R2OUT R2IN 23 24 R3OUT R3IN 17 18 R4OUT R4IN 14 13 R5OUT R5IN VCC 20 21 GND 5 x 3.3k Ω 1N5711 6 5 4 1 2 390 Ω 3.3k Ω VCC ISO ROUT ROUT 1N5711 1 2 6 5 4 390 Ω 3.3k Ω VCC ISO TIN TIN *74HC04 4N25 LOWER SPEED, LOWER COST ALTERNATE OPTOCOUPLER CONFIGURATIONS (FOR DATA RATES BELOW 9.6kbps) FS 3 74HCO4 4N25 ISO GND 4N25 ISO GND 1CT:1.3CT** Figure 5. Typical RS-232 Application Circuit MAX253 Maxim Integrated 9 |
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