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MAX3243ECDWG4 Datasheet(PDF) 2 Page - Texas Instruments

Part # MAX3243ECDWG4
Description  3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH 짹15-kV IEC ESD PROTECTION
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

MAX3243ECDWG4 Datasheet(HTML) 2 Page - Texas Instruments

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DESCRIPTION
MAX3243E
SLLS657C – APRIL 2005 – REVISED FEBRUARY 2009................................................................................................................................................... www.ti.com
The MAX3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with
±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge)
protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides the
electrical interface between an asynchronous communication controller and the serial-port connector. This
combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or
compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V
supply. In addition, the device includes an always-active noninverting output (ROUT2B), which allows
applications using the ring indicator to transmit data while the device is powered down. The device operates at
data signaling rates up to 250 kbit/s and a maximum of 30-V/
µs driver output slew rate.
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.
ORDERING INFORMATION
TA
PACKAGE(1)(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
MAX3243ECDW
SOIC – DW
Tape and reel
MAX3243EC
MAX3243ECDWR
MAX3243ECDB
SSOP – DB
Tape and reel
MAX3243EC
0°C to 70°C
MAX3243ECDBR
MAX3243ECPW
TSSOP – PW
Tape and reel
MP243EC
MAX3243ECPWR
QFN – RHB
Tape and reel
MAX3243ECRHBR
MP243E
MAX3243EIDB
SSOP – DB
Tape and reel
MAX3243EI
MAX3243EIDBR
MAX3243EIDW
SOIC – DW
Tape and reel
MAX3243EI
–40°C to 85°C
MAX3243EIDWR
MAX3243EIPW
TSSOP – PW
Tape and reel
MP243EI
MAX3243EIPWR
QFN – RHB
Tape and reel
MAX3243EIRHBR
MR243E
(1)
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(2)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
2
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): MAX3243E


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