Rainbow Electronics MAX13223E - Manual

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
♦ ±70V Fault Protection
♦ +3.0V to +5.5V Supply Voltage
♦ Overvoltage Current Limiting
♦ Current Protection at Transmitter Outputs
♦ AutoShutdown
♦ 250kbps (Max) Data Rate
♦ Low Current Consumption in Shutdown 1µA (typ)
♦ Thermal Shutdown Protection
♦ ±8kV IEC 61000-4-2 Contact-Discharge Method
♦ -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
0.1 µF
C4
5k Ω
5k Ω
C2-
C2+
C2
C1-
C1+
C1
Typical Operating Circuit