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ST3485ECDR Datasheet(PDF) 2 Page - STMicroelectronics |
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ST3485ECDR Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 16 page ST3485E 2/16 PIN CONFIGURATION PIN DESCRIPTION TRUTH TABLE (DRIVER) X= Don’t Care; Z=High Impedance TRUTH TABLE (RECEIVER) X= Don’t Care; Z=High Impedance PlN N° SYMBOL NAME AND FUNCTION 1RO Receiver Output. If A>B by 200mV, RO will be high; if A<B by 200mV, RO will be low 2RE Receiver Output Enable. RO is enabled when RE is low; RO is high impedance when RE is high. If RE is high and DE is low, the device will enter a low power shutdown mode. 3DE Driver Output Enable. The driver outputs are enabled by bringing DE high. They are high impedance when DE is low. If RE is high DE is low, the device will enter a low-power shutdown mode. If the driver outputs are enabled, the part functions as line driver, while they are high impedance, it functions as line receivers if RE is low. 4DI Driver Input. A low on DI forces output A low and output B high. Similarly, a high on DI forces output A high and output B low 5 GND Ground 6 A Non-inverting Receiver Input and Non-inverting Driver Output 7 B Inverting Receiver Input and Inverting Driver Output 8 VCC Supply Voltage: VCC= 3V to 3.6V INPUTS OUTPUTS MODE RE DE DI B A X H H L H Normal X H L H L Normal L L X Z Z Normal H L X Z Z Shutdown INPUTS OUTPUT MODE RE DE A-B RO LL ≥ -0.015V H Normal LL ≤ -0.2V L Normal L L Inputs Open H Normal L L Inputs Shorted H Normal H L X Z Shutdown |
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