MAX481 Maxim Integrated Products, MAX481 Datasheet
MAX481
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MAX481 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 MAX481, MAX485, MAX490, MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers ...
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Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) .............................................................12V CC Control Input Voltage (RE, DE)...................-0. Driver Input Voltage (DI).............................-0. Driver Output Voltage (A, B)...................................-8V to +12.5V Receiver Input Voltage (A, B).................................-8V to +12.5V ...
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... Maximum Data Rate f MAX Time to Shutdown t SHDN _______________________________________________________________________________________ Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers CONDITIONS MAX488/MAX489, DE, DI MAX490/MAX491, DE, DI MAX481/MAX485 MAX1487 MAX483/MAX487 MAX481/483/487 0V -7V V 12V (Note 4) O -7V V 12V (Note CONDITIONS Figures 6 and DIFF 100pF L1 L2 Figures 6 and DIFF L1 MAX481, MAX485, MAX1487 Figures 6 and ...
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... Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued ±5 unless otherwise noted.) (Notes MIN MAX PARAMETER SYMBOL Driver Enable from Shutdown to t ZH(SHDN) Output High (MAX481) Driver Enable from Shutdown to t ZL(SHDN) Output Low (MAX481) Receiver Enable from Shutdown ...
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... Note 4: Applies to peak current. See Typical Operating Characteristics. Note 5: The MAX481/MAX483/MAX487 are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown ...
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... OUTPUT HIGH VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE 600 500 400 , MAX1487 300 , 200 MAX1487 0V 100 CC 0 -60 - 100 125 MAX481/MAX485/MAX490/MAX491 SUPPLY CURRENT vs. TEMPERATURE 600 MAX481/MAX485 500 400 300 MAX485 MAX481 200 MAX490/MAX491 100 MAX481 -50 - TEMPERATURE ( C) MAX1487 , - 100 120 140 TEMPERATURE ( C) 100 125 ...
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... MAX481 7 GND MAX483 MAX485 MAX487 MAX1487 MAX Figure 1. MAX481/MAX483/MAX485/MAX487/MAX1487 Pin Configuration and Typical Operating Circuit _______________________________________________________________________________________ Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers NAME MAX489/ NAME MAX491 DIP/SO Receiver Output > 200mV, RO will be high < 200mV, RO will be low. Receiver Output Enable enabled when RE is low high impedance when RE is high. ...
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... MAX483, MAX487, MAX488, and MAX489 are specified for data rates up to 250kbps. The MAX488–MAX491 are full-duplex trans- ceivers while the MAX481, MAX483, MAX485, MAX487, and MAX1487 are half-duplex. In addition, Driver Enable (DE) and Receiver Enable (RE) pins are included on the MAX481, MAX483, MAX485, MAX487, MAX489, MAX491, and MAX1487 ...
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... The MAX483 and MAX487–MAX489 are slew-rate limit- ed, minimizing EMI and reducing reflections caused by improperly terminated cables. Figure 12 shows the dri- ver output waveform and its Fourier analysis of a 150kHz signal transmitted by a MAX481, MAX485, MAX490, MAX491, or MAX1487. High-frequency har- _______________________________________________________________________________________ Low-Power, Slew-Rate-Limited ...
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... Figure 9. Driver Enable and Disable Times (except MAX488 and MAX490 1. Figure 11. Receiver Enable and Disable Times (except MAX488 and MAX490) Table 2. Receiving OUTPUTS High High Don't care High-Z = High impedance * Shutdown mode for MAX481/MAX483/MAX487 1. ZL(SHDN) ZL 2.3V V +0.5V OUTPUT NORMALLY LOW OL OUTPUT NORMALLY HIGH V -0.5V 2. ZH(SHDN 1. ZL(SHDN ...
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... Figure 12. Driver Output Waveform and FFT Plot of MAX481/ MAX485/MAX490/MAX491/MAX1487 Transmitting a 150kHz Signal Low-Power Shutdown Mode (MAX481/MAX483/MAX487) A low-power shutdown mode is initiated by bringing both RE high and DE low. The devices will not shut down unless both the driver and receiver are disabled. ...
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... Figure 15. MAX481/MAX485/MAX490/MAX491/MAX1487 Receiver t PHL A 500mV/div B RO 2V/div 400ns/div Figure 17. MAX483, MAX487–MAX489 Receiver t 12 ______________________________________________________________________________________ 100pF Z B TTL < 6ns 100pF 500mV/div A 2V/div RO Figure 16. MAX481/MAX485/MAX490/MAX491/MAX1487 Receiver t PLH B 500mV/div + 2V/div RO Figure 18. MAX483, MAX487–MAX489 Receiver t PHL RECEIVER OUT + 20ns/div + 400ns/div PLH ...
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... RO RE MAX481 MAX483 MAX485 MAX487 MAX1487 Figure 21. MAX481/MAX483/MAX485/MAX487/MAX1487 Typical Half-Duplex RS-485 Network ______________________________________________________________________________________ Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers Figures 21 and 22 show typical network applications circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet, as shown in Figure 23. ...
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Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers A 120 120 NOTE: RE AND DE ON MAX489/MAX491 ONLY. Figure 22. MAX488–MAX491 Full-Duplex RS-485 Network MAX488–MAX491 A RO 120 ...
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... MAX1487CUA 8 SO MAX1487C/D 8 CERDIP MAX1487EPA 8 Plastic DIP MAX1487ESA 8 SO MAX1487MJA 8 µMAX Dice* * Contact factory for dice specifications. 8 Plastic DIP CERDIP _________________Chip Topographies 8 Plastic DIP 8 SO MAX481/MAX483/MAX485/MAX487/MAX1487 8 µMAX Dice* 8 Plastic DIP CERDIP 14 Plastic DIP Dice* 14 Plastic DIP CERDIP TEMP. RANGE PIN-PACKAGE 0°C to +70°C 8 Plastic DIP 0° ...
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Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers _____________________________________________Chip Topographies (continued) MAX488/MAX490 N.C. N.C. DI GND 0.080" (2.032mm) 16 ______________________________________________________________________________________ 0.054" Z (1.372mm TRANSISTOR COUNT: 248 SUBSTRATE CONNECTED TO GND MAX489/MAX491 ...
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For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers Package Information 17 ...
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Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 18 ______________________________________________________________________________________ Package Information (continued) ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2003 Maxim Integrated Products ...