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MAX3243ECPWRE4 Datasheet(PDF) 2 Page - Texas Instruments |
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MAX3243ECPWRE4 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 24 page www.ti.com DESCRIPTION (CONTINUED) MAX3243E 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV IEC ESD PROTECTION SLLS657A – APRIL 2005 – REVISED JUNE 2005 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. The MAX3243EC is characterized for operation from 0 °C to 70°C. The MAX3243EI is characterized for operation from –40 °C to 85°C. AVAILABLE OPTIONS PACKAGED DEVICES(1) SHRINK THIN SHRINK QUAD FLAT TA SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE NO-LEAD (DB) (DB) (PW) (RHB) MAX3243ECRHBR 0 °C to 70°C MAX3243ECDB MAX3243ECDW MAX3243ECPW (Preview) MAX3243EIDB MAX3243EIRHBR –40 °C to 85°C MAX3243EIDW MAX3243EIPW (Preview) (1) The DB, DW, and PW packages are available in both tube and taped & reeled. Add the suffix R to orderable (e.g. MAX3243ECDBR for taped & reeled version). 2 |
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