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MAX3467CSA Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX3467CSA Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 14 page +5V, Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (VCC = +5V, TA = +25°C, unless otherwise noted.) DRIVER AND RECEIVER PROPAGATION DELAYS MAX3465 toc13 10ns/div 5V/div 5V/div 2V/div Y, Z DI RO RDIFF = 54 Ω DATA RATE = 20Mbps ENABLE RESPONSE TIME MAX3465 toc14 20ns/div 5V/div 1V/div Y, Z DE RDIFF = 54 Ω EYE DIAGRAM MAX3465 toc15 10ns/div 1V/div Y, Z RDIFF = 54 Ω DATA RATE = 20Mbps Pin Description PIN FULL DUPLEX HALF DUPLEX NAME FUNCTION MAX3465/ MAX3466 MAX3467 MAX3468/ MAX3469 SHDN Shutdown. Drive SHDN high to enter low-power shutdown mode. 1 —— RO Receiver Output. When RE is low and (A - B) ≥ -50mV, RO is high; if (A - B) ≤ -200mV, RO is low. 22 1 RE Receiver Output Enable. Drive RE low to enable RO; RO is high impedance when RE is high. Drive RE high and DE low to enter low-power shutdown mode. 3 — 2DE Driver Output Enable. Drive DE high to enable driver output. The driver outputs are high impedance when DE is low. Drive RE high and DE low to enter low-power shutdown mode. 4 — 3DI Driver Input. With DE high, a low on DI forces the noninverting output low and the inverting output high. Similarly, a high on DI forces the noninverting output high and the inverting output low. 5 3 4 GND Ground 6, 7 4 5 TXP Transmitter Phase. Connect TXP to GND, or leave unconnected for normal transmitter phase/polarity. Connect TXP to VCC to invert the transmitter phase/polarity. TXP has an internal 15µA pulldown. 8 —— Y Noninverting Driver Output 95 — Z Inverting Driver Output 10 6 — B Inverting Receiver Input 11 7 — A Noninverting Receiver Input 12 8 — RXP Receiver Phase. Connect RXP to GND, or leave unconnected for normal receiver phase/polarity. Connect RXP to VCC to invert the receiver phase/polarity. RXP has an internal 15µA pulldown. 13 —— VCC Positive Supply: +4.75V ≤ VCC ≤ +5.25V. Bypass VCC to GND with a 0.1µF capacitor. 14 1 8 B Inverting Receiver Input and Inverting Driver Output —— 7 A Noninverting Receiver Input and Noninverting Driver Output —— 6 |
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