Port Powered TTL/RS-232
Converters
Models 232LPTTL, 232LPTTL33
www.advantech-bb.com
PRODUCT FEATURES
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Converts 2 channels in each direction from TTL (“Transistor Transistor
Logic") to RS-232
5V and 3.3V TTL options
Baud rates up to 115.2 kbps
Powered from RS-232 data/handshake lines - no power supply
required
These four channel TTL/CMOS converters make easy connections between
TTL equipment and RS-232 ports and operate at data rates up to 115.2 kbps.
They convert two channels (TX and RX) in each direction (bi-directional) from
TTL to RS-232. Use these converters with almost any micro-controller or
programmable logic controller (PLC) that supports TTL.
Model 232LPTTL converts RS-232 to 5VDC TTL/CMOS competitive levels.
Model 232LPTTL33 converts RS-232 to 3.3VDC TTL/CMOS compatible levels.
Two channels are used to convert from RS-232 to TTL/CMOS signals and
two channels are used to convert from TTL/CMOS signals to RS-232. These
converters support TD, RD, RTS, and CTS. DB9S female connector on the RS-
232 side. DB9P male connector on the TTL/CMOS side. This unit is powered
from the RS-232 data and handshake lines, whether the lines are high or low.
ORDERING INFORMATION
RS-232
MODEL NUMBER CONNECTOR
232LPTTL
DB9 Female
232LPTTL33
DB9 Female
TTL CONNECTOR TTL VDC
DB9 Male
DB9 Male
5V
3.3V
ACCESSORIES
9PAMF6
- DB9 Male to DB9 Female, 1.8 m (6 ft.)
MMNM9
- Null Modem Adapter - DB9 Male / DB9 Male
RS-232
DB9S Female Pin
3 (Input)
2 (Output)
7 (Input)
8 (Output)
5 (Signal Gnd)
Function
TD
RD
RTS
CTS
GND
TTL/CMOS
DB9P Male Pin
3 (Output)
2 (Input)
7 (Output)
8 (Input)
5 (Signal gnd)
Pin 5 is signal ground for both connectors. Both models are powered by the
signals on pins 7(RTS), 4 (DTR), and 3(TD). These handshake lines can be in
either the high or low condition, but must be present to power the converter. The
unit can work at baud rates up to 115.2 kbps.
It is important that TTL/CMOS logic, and only TTL/CMOS logic (0 to +5 VDC
for the 232LPTTL, and 0 to +3.3 VDC for the 232LPTTL33) is used for the TTL/
CMOS side of the converter. The maximum sinking current for one TTL/CMOS
output is 3.2 mA. The maximum source current for one TTL/CMOS is 1 mA.
Signal levels are inverted by the converters. Please refer to the table under
Specifications.
All product specifications are subject to change without notice.
232LPTTL, 232LPTTL33_2916ds
orders@advantech-bb.com
support@advantech-bb.com
Corporate Headquarters: 707 Dayton Road, PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104
European Office: Westlink Commercial Park, Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445
Port Powered TTL/RS-232
Converters
Models 232LPTTL, 232LPTTL33
SPECIFICATIONS
SERIAL TECHNOLOGY
Data Rate
RS-232
Connector
Signals
TTL
Connector
Signals
Logic
VDC Level
POWER
Source
MECHANICAL
Dimensions
Enclosure
Weight
MTBF, 232LPTTL33
MTBF Calc. Method,
232LPTTL33
115.2 kbps maximum
DB9 female
TD, RD, RTS, CTS
DB9 male
2 Input/2 Output Channels, GND
CMOS
232LPTTL: 5V
232LPTTL33: 3.3V
Port-powered: from RS-232 handshake lines
5.29 x 3.33 x 1.74 cm (2.08 x 1.31 x 0.66 in)
Plastic, In-line
0.08 lbs (36.2 g)
1674682
Parts Count Reliability Prediction
ENVIRONMENTAL
Operating Temperature
0 to +70 °C (+32 to +158 °F)
Storage Temperature
-40 to +85 °C (-40 to +185 °F)
Operating Humidity
0 to 95% Non-Condensing
APPROVALS / CERTIFICATIONS - 232LPTTL
FCC Part 15, Class B Emissions
CE
2014/30/EC
Electomagnetic Compatiblity Directive
2011/65/EU
Reduction of Hazardous Substances Directive
20125/19/EU
Waste electrical and electronic equipment (WEEE)
Information technology equipment - Radio Disturbance
EN55022: +AC (Class B)
characteristics - Limits and methods of measurement
Generic immunity standard for residential, commercial and
EN61000-6-1
light-industrial environments
EN61000-4-2
ESD Immunity
EN61000-4-3: +A2
Radiated Immunity
EN61000-4-4
EFT/Burst Immunity
EN61000-4-6
RF Conducted Immunity
POLARITY
5VDC TTL/CMOS
Input
Low (< .8V)
High (> 2V)
MECHANICAL DIAGRAM –
232LPTTL, 232LPTTL33
3.3VDC TTL/CMOS
Input
Low (< .8V)
High (> 2V)
RS-232 Output
+5V minimum, +9V typical
-5V minimum, -+9V typical
3.33 cm
1.31 in
1.74 cm
0.66 in
5VDC TTL/CMOS
Output
3.3VDC TTL/CMOS
Output
RS-232 Input
Low (< .2V)
High (> 2.4V)
+3.45V minimum,
+4.6V typical
+.55V maximum,
+.1V typical
+2.4V minimum, +3.0V
typical
+.55V maximum, +.1V
typical
5.29 cm
2.08 in
orders@advantech-bb.com
support@advantech-bb.com
Corporate Headquarters: 707 Dayton Road, PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104
European Office: Westlink Commercial Park, Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445
