B&B Electronics 232LPTTL33 - Datasheet - Manual

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Port Powered TTL/RS-232 Converters
232LPTTL, 232LPTTL33
These non-isolated, four channel TTL/CMOS converters make easy
connections between TTL equipment and RS-232 ports and run at a
maximum baud rate speed of 115.2 kbps. All models 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 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.
Pins used are:
• Convert 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
PRODUCT FEATURES
ACCESSORiES
9PAMF6 - DB9 Male to DB9 Female, 1.8 m (6 ft.)
MMNM9 - Null Modem Adapter - DB9 Male / DB9 Male
ORDERing inFORmATiOn
Model NuMber
rS-232
CoNNeCtor
ttl CoNNeCtor ttl VdC
232LPTTL DB9 Female DB9 Male 5V
232LPTTL33 DB9 Female DB9 Male 3.3V
rS-232
db9S Female Pin Function
ttl/CMoS
db9P Male Pin
3 (input) TD 3 (output)
2 (output) RD 2 (input)
7 (input) RTS 7 (output)
8 (output) CTS 8 (input)
5 (signal gnd) GND 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.
232LPTTL, 232LPTTL33_0414ds