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MAX3485CSA Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX3485CSA Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 16 page 3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers 4 _______________________________________________________________________________________ DRIVER SWITCHING CHARACTERISTICS—MAX3483 and MAX3488 (VCC = 3.3V, TA = +25°C) ns 50 80 tPLZ Driver Output Disable Time from Low Level RL = 110Ω, Figure 10 ns 700 1000 1500 tPLH Driver Propagation Delay, Low-to-High Level ns 400 700 1200 tTD ns 600 900 1400 tDD Driver Differential Output Delay Driver Differential Output Transition Time µs 2.2 3.0 tPSH Driver Output Enable Time from Shutdown to High Level µs 1.9 2.7 tPSL Driver Output Enable Time from Shutdown to Low Level ns 50 80 tPHZ Driver Output Disable Time from High Level ns 700 1000 1500 tPHL Driver Propagation Delay, High-to-Low Level ns 100 tPDS |tPLH - tPHL| Driver Propagation Delay Skew (Note 2) ns 900 1300 tPZL Driver Output Enable Time to Low Level ns 600 800 tPZH Driver Output Enable Time to High Level UNITS MIN TYP MAX SYMBOL PARAMETER RL = 27Ω, Figure 8 RL = 60Ω, Figure 7 RL = 60Ω, Figure 7 RL = 110Ω, Figure 9 RL = 110Ω, Figure 10 RL = 110Ω, Figure 9 RL = 27Ω, Figure 8 RL = 27Ω, Figure 8 RL = 110Ω, Figure 10 RL = 110Ω, Figure 9 CONDITIONS RECEIVER SWITCHING CHARACTERISTICS (VCC = 3.3V, TA = +25°C) ns 25 45 tPRLZ Receiver Output Disable Time from Low Level CL = 15pF, Figure 12, MAX3483/MAX3485/MAX3486/MAX3491 only ns 25 65 90 ns 80 190 300 tSHDN Time to Shutdown ns 720 1400 tPRSH Receiver Output Enable Time from Shutdown to High Level ns 720 1400 tPRSL Receiver Output Enable Time from Shutdown to Low Level ns 25 45 tPRHZ Receiver Output Disable Time from High Level ns 25 65 90 ns 10 ns 25 50 tPRZL Receiver Output Enable Time to Low Level ns 25 50 tPRZH Receiver Output Enable Time to High Level UNITS MIN TYP MAX SYMBOL PARAMETER VID = 0V to 3.0V, CL = 15pF, Figure 11 MAX3483/MAX3485/MAX3486/MAX3491 only (Note 3) CL = 15pF, Figure 12, MAX3483/MAX3485/MAX3486/MAX3491 only CL = 15pF, Figure 12, MAX3483/MAX3485/MAX3486/MAX3491 only CL = 15pF, Figure 12, MAX3483/MAX3485/MAX3486/MAX3491 only VID = 0V to 3.0V, CL = 15pF, Figure 11 VID = 0V to 3.0V, CL = 15pF, Figure 11 CL = 15pF, Figure 12, MAX3483/MAX3485/MAX3486/MAX3491 only CL = 15pF, Figure 12, MAX3483/MAX3485/MAX3486/MAX3491 only CONDITIONS 25 75 120 tRPLH Receiver Propagation Delay, Low-to-High Level MAX3483/MAX3488 25 75 120 tRPHL Receiver Propagation Delay, High-to-Low Level MAX3483/MAX3488 20 tRPDS |tPLH - tPHL| Receiver Propagation Delay Skew MAX3483/MAX3488 Note 1: ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state. Note 2: Measured on |tPLH (Y) - tPHL (Y)| and |tPLH (Z) - tPHL (Z)|. Note 3: The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 80ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to have entered shutdown. See Low-Power Shutdown Mode section. DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3483 only) |
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