Rainbow-electronics MAX13223E Bedienungsanleitung Seite 1

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General Description
The MAX13223E is a +3.0V to +5.5V-powered EIA/TIA-
232 and V.28 communications interface with fault protec-
tion on the RS-232 line interface. This allows shorts of the
transmitter outputs and receiver inputs to voltages in the
±70V range without adversely affecting the MAX13223E.
The MAX13223E achieves 1µA supply current using
Maxim’s AutoShutdown™ feature. The MAX13223E
automatically enters a low-power shutdown mode when
the RS-232 cable is disconnected or the receivers are
inactive. The device turns on again when a valid transi-
tion at any receiver input is sensed. A proprietary, high-
efficiency, dual charge-pump power supply and a
low-dropout transmitter combine to deliver true RS-232
performance from a single +3.0V to +5.5V supply.
The MAX13223E has two receivers and two drivers and is
guaranteed to run at data rates of 250kbps for one trans-
mitter switching while maintaining RS-232 output levels.
The MAX13223E operates from input voltages ranging
from +3.0V to +5.5V and is available in a 20-pin, 6.5mm
x 4.4mm, TSSOP package. The MAX13223E is speci-
fied over the -40°C to +85°C temperature range.
Applications
Automotive
Telematics Equipment
Base Stations
Utility Meters
Industrial Equipment
Telecomm Equipment
POS Terminal Equipment
Features
o ±70V Fault Protection
o +3.0V to +5.5V Supply Voltage
o Overvoltage Current Limiting
o Current Protection at Transmitter Outputs
o AutoShutdown
o 250kbps (Max) Data Rate
o Low Current Consumption in Shutdown 1µA (typ)
o Thermal Shutdown Protection
o ±8kV IEC 61000-4-2 Contact-Discharge Method
o -40°C to +85°C Operating Temperature Range
MAX13223E
±70V Fault-Protected, 3.0V to 5.5V,
2Tx/2Rx RS-232 Transceiver
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-4585; Rev 0; 4/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
PART TEMP RANGE PIN-PACKAGE
MAX13223EEUP+ -40°C to +85°C 20 TSSOP
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit appears at end of data sheet.
MAX13223E
FORCEON
EN
R2OUT
R1OUT
FORCEOFF
INVALID
R2IN
GND
RS-232
OUTPUTS
TTL/CMOS
INPUTS
T2IN
T1IN
R1IN
T2OUT
T1OUT
V-
V+
V
CC
V
CC
V
CC
RS-232
INPUTS
TO POWER-
MANAGEMENT
UNIT
TTL/CMOS
OUTPUTS
C3
C
BYPASS
0.1µF
C4
5k
5k
C2-
C2+
C2
C1-
C1+
C1
Typical Operating Circuit
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Inhaltsverzeichnis

Seite 1 - 2Tx/2Rx RS-232 Transceiver

General DescriptionThe MAX13223E is a +3.0V to +5.5V-powered EIA/TIA-232 and V.28 communications interface with fault protec-tion on the RS-232 line i

Seite 2

MAX13223EFault ProtectionThe MAX13223E is designed to survive faults such asdirect shorts to power supplies, miswiring faults, con-nector failures, an

Seite 3

MAX13223E±70V Fault-Protected, 3.0V to 5.5V,2Tx/2Rx RS-232 TransceiverMaxim cannot assume responsibility for use of any circuitry other than circuitry

Seite 4

MAX13223E±70V Fault-Protected, 3.0V to 5.5V,2Tx/2Rx RS-232 Transceiver2 ______________________________________________________________________________

Seite 5

MAX13223E±70V Fault-Protected, 3.0V to 5.5V,2Tx/2Rx RS-232 Transceiver________________________________________________________________________________

Seite 6

MAX13223E±70V Fault-Protected, 3.0V to 5.5V,2Tx/2Rx RS-232 Transceiver4 ______________________________________________________________________________

Seite 7

MAX13223E±70V Fault-Protected, 3.0V to 5.5V,2Tx/2Rx RS-232 Transceiver________________________________________________________________________________

Seite 8

MAX13223E±70V Fault-Protected, 3.0V to 5.5V,2Tx/2Rx RS-232 Transceiver6 ______________________________________________________________________________

Seite 9

Detailed DescriptionFigure 2 shows the receiver test circuit. Figure 3 showsdriver propagation delay and Figure 4 shows receiverpropagation delay.Dual

Seite 10

MAX13223EAutoShutdownThe MAX13223E achieves 1µA supply current withMaxim’s AutoShutdown feature, which operates whenFORCEON is low and FORCEOFF is hig

Seite 11

Applications InformationCapacitor SelectionThe capacitor type used for C1–C4 is not critical forproper operation; either polarized or nonpolarizedcapa

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