MAX490E Maxim Integrated Products, MAX490E Datasheet
MAX490E
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MAX490E Summary of contents
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... EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw as little as 120µA supply current when unloaded or when fully loaded with disabled drivers (see Selection Table ) ...
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ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) .............................................................12V CC – — – Control Input Voltage ( DE)...................-0. Driver Input Voltage (DI).............................-0. Driver Output Voltage ( ...
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... Supply Current in Shutdown I SHDN Driver Short-Circuit Current, I OSD1 V = High O Driver Short-Circuit Current, I OSD2 V = Low O Receiver Short-Circuit Current I OSR ESD Protection SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E ( ±5 unless otherwise noted.) (Notes MIN MAX PARAMETER SYMBOL t PLH Driver Input to Output t PHL Driver Output Skew to Output t ...
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... ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E ( ±5 unless otherwise noted.) (Notes MIN MAX PARAMETER SYMBOL Driver Enable from Shutdown to t ZH(SHDN) Output High (MAX481E) Driver Enable from Shutdown to t ZL(SHDN) Output Low (MAX481E) Receiver Enable from Shutdown ...
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ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICS Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. Note 2: All ...
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... TEMPERATURE (°C) MAX481E/MAX485E/MAX490E/MAX491E SUPPLY CURRENT vs. TEMPERATURE 600 MAX481E/MAX485E 500 400 300 MAX485E MAX481E 200 MAX490E/MAX491E 100 MAX481E -60 -40 - 100 TEMPERATURE (°C) 6 _______________________________________________________________________________________ OUTPUT CURRENT vs. DRIVER OUTPUT LOW VOLTAGE 140 120 100 ...
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... ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers ______________________________________________________________Pin Description PIN MAX481E/MAX483E MAX488E MAX485E/MAX487E MAX490E MAX1487E — 3 — — 5 — — — — — — — _______________________________________________________________________________________ NAME MAX489E MAX491E Receiver Output > 200mV, RO will be high < 200mV, RO will be low. – — – Receiver Output Enable enabled when ...
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... TOP VIEW GND DIP/SO Figure 1. MAX481E/MAX483E/MAX485E/MAX487E/MAX1487E Pin Configuration and Typical Operating Circuit TOP VIEW GND DIP/SO Figure 2. MAX488E/MAX490E Pin Configuration and Typical Operating Circuit TOP VIEW N. N. GND GND 7 8 N.C. DIP/SO Figure 3. MAX489E/MAX491E Pin Configuration and Typical Operating Circuit 8 _______________________________________________________________________________________ 0 ...
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... The standard (non-“E”) MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are recommended for applications where cost is critical. The MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E can transmit and receive at data rates up to 2.5Mbps, while the MAX483E, MAX487E, MAX488E, and MAX489E are specified for data rates up to 250kbps. The MAX488E– ...
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ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers 1500 C D DISCHARGE CHARGE CURRENT LIMIT RESISTOR RESISTANCE HIGH C s STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 4. Human Body ESD Test Model R 50M to 100M R 330 ...
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... Figure 11. Driver Timing Test Load 3V DE 1.5V 1. 10% Figure 13. Driver Enable and Disable Times (except MAX488E and MAX490E 1. Figure 15. Receiver Enable and Disable Times (except MAX488E and MAX490E 500 1. ZL(SHDN 2.3V V +0.5V OUTPUT NORMALLY LOW OL OUTPUT NORMALLY HIGH 2.3V V -0. ...
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... Figure 16 shows the driver output waveform and its Fourier analy- sis of a 150kHz signal transmitted by a MAX481E, MAX485E, MAX490E, MAX491E, or MAX1487E. High- frequency harmonics with large amplitudes are evident. Figure 17 shows the same information displayed for a MAX483E, MAX487E, MAX488E, or MAX489E transmit- ting under the same conditions. Figure 17’ ...
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... Typical propagation delays are shown in Figures 19–22 using Figure 18’s test circuit. The difference in receiver delay times, t typically under 13ns for the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E, and is typically less than 100ns for the MAX483E and MAX487E– RECEIVER MAX489E. ...
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... ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers A 500mV/div B RO 5V/div 25ns/div Figure 19. MAX481E/MAX485E/MAX490E/MAX1487E Receiver t PHL A 500mV/div B RO 5V/div 200ns/div Figure 21. MAX483E/MAX487E–MAX489E Receiver s/div Figure 23. MAX481E/MAX485E/MAX490E/MAX491E/ MAX1487E System Differential Voltage at 110kHz Driving 4000ft of Cable 14 ______________________________________________________________________________________ B 500mV/div A 5V/div RO Figure 20. MAX481E/MAX485E/MAX490E/MAX491E/ MAX1487E Receiver t PLH ...
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... ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers 120 MAX481E MAX483E MAX485E MAX487E MAX1487E Figure 25. MAX481E/MAX483E/MAX485E/MAX487E/MAX1487E Typical Half-Duplex RS-485 Network A 120 120 NOTE: RE AND DE ON MAX489E/MAX491E ONLY. Figure 26. MAX488E–MAX491E Full-Duplex RS-485 Network ______________________________________________________________________________________ 120 120 120 MAX488E MAX489E MAX490E RE RO MAX491E 15 ...
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... Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1996 Maxim Integrated Products PART MAX489ECPD MAX489ECSD MAX489EEPD MAX489EESD MAX490ECPA MAX490ECSA MAX490EEPA MAX490EESA MAX491ECPD MAX491ECSD MAX491EEPD MAX491EESD MAX1487ECPA MAX1487ECSA MAX1487EEPA MAX1487EESA Printed USA is a registered trademark of Maxim Integrated Products. ...