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MAX3243IDWR Datasheet(PDF) 2 Page - Texas Instruments |
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MAX3243IDWR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 18 page MAX3243 3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER WITH ±15kV ESD (HBM) PROTECTION SLLS350L − APRIL 1999 − REVISED MARCH 2004 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high and should be done when driving a serial mouse. With auto-powerdown enabled, the device is activated automatically when a valid signal is applied to any receiver input. The INVALID output is used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any receiver input voltage is greater than 2.7 V or less than −2.7 V or has been between −0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid data) if all receiver input voltages are between −0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for receiver input levels. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING SOIC (DW) Tube of 20 MAX3243CDW MAX3243C SOIC (DW) Reel of 1000 MAX3243CDWR MAX3243C 0 °C to 70°C SSOP (DB) Tube of 50 MAX3243CDB MAX3243C 0 °C to 70°C SSOP (DB) Reel of 2000 MAX3243CDBR MAX3243C TSSOP (PW) Tube of 50 MAX3243CPW MA3243C TSSOP (PW) Reel of 2000 MAX3243CPWR MA3243C SOIC (DW) Tube of 20 MAX3243IDW MAX3243I SOIC (DW) Reel of 1000 MAX3243IDWR MAX3243I −40 °C to 85°C SSOP (DB) Tube of 50 MAX3243IDB MAX3243I −40 °C to 85°C SSOP (DB) Reel of 2000 MAX3243IDBR MAX3243I TSSOP (PW) Tube of 50 MAX3243IPW MB3243I TSSOP (PW) Reel of 2000 MAX3243IPWR MB3243I † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Function Tables EACH DRIVER INPUTS OUTPUT DIN FORCEON FORCEOFF VALID RIN RS-232 LEVEL OUTPUT DOUT DRIVER STATUS X X L X Z Powered off L H H X H Normal operation with H HH X L Normal operation with auto-powerdown disabled L L H Yes H Normal operation with H LH Yes L Normal operation with auto-powerdown enabled L L H No Z Powered off by H L H No Z Powered off by auto-powerdown feature H = high level, L = low level, X = irrelevant, Z = high impedance |
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