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MAX249EQH+ Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX249EQH+ Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 38 page +5V-Powered, Multichannel RS-232 Drivers/Receivers 4 _______________________________________________________________________________________ __________________________________________Typical Operating Characteristics MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243 10 8 -10 0 5 15 25 OUTPUT VOLTAGE vs. LOAD CURRENT -4 -6 -8 -2 6 4 2 LOAD CURRENT (mA) 10 0 20 0.1 μF EITHER V+ OR V- LOADED VCC = +5V NO LOAD ON TRANSMITTER OUTPUTS (EXCEPT MAX220, MAX233A) V- LOADED, NO LOAD ON V+ V+ LOADED, NO LOAD ON V- 1 μF 1 μF 0.1 μF 11 10 4 010 40 60 AVAILABLE OUTPUT CURRENT vs. DATA RATE 6 5 7 9 8 DATA RATE (kb/s) 20 30 50 OUTPUT LOAD CURRENT FLOWS FROM V+ TO V- VCC = +5.25V ALL CAPS 1 μF ALL CAPS 0.1 μF VCC = +4.75V +10V -10V MAX222/MAX242 ON-TIME EXITING SHUTDOWN +5V +5V 0V 0V 500 μs/div 1 μF CAPS V+ V+ V- V- SHDN 0.1 μF CAPS 1 μF CAPS 0.1 μF CAPS ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued) (VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS MAX222/MAX232A/MAX233/ MAX242/MAX243 0.5 1 tPHLR, Figure 2 MAX220 0.6 3 MAX222/MAX232A/MAX233/ MAX242/MAX243 0.6 1 Receiver Propagation Delay RS-232 to TLL (Normal Operation) tPLHR, Figure 2 MAX220 0.8 3 μs tPHLS, Figure 2 MAX242 0.5 10 Receiver Propagation Delay RS-232 to TLL (Shutdown) tPHLS, Figure 2 MAX242 2.5 10 μs Receiver-Output Enable Time tER MAX242, Figure 3 125 500 ns Receiver-Output Disable Time tDR MAX242, Figure 3 160 500 ns Transmitter-Output Enable Time ( SHDN Goes High) tET MAX222/MAX242, 0.1μF caps (includes charge-pump start-up), Figure 4 250 μs Transmitter-Output Disable Time ( SHDN Goes Low) tDT MAX222/MAX242, 0.1μF caps, Figure 4 600 ns MAX222/MAX232A/MAX233/ MAX242/MAX243 300 Transmitter + to - Propagation Delay Difference (Normal Operation) tPHLT - tPLHT MAX220 2000 ns MAX222/MAX232A/MAX233/ MAX242/MAX243 100 Receiver + to - Propagation Delay Difference (Normal Operation) tPHLR - tPLHR MAX220 225 ns Note 3: All units are production tested at hot. Specifications over temperature are guaranteed by design. Note 4: MAX243 R2OUT is guaranteed to be low when R2IN ≥ 0V or is unconnected. |
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