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RS232 to 3.3V TTL Converter

Model TTL-232-33P

Category: RS232 / RS485 to TTL Converters

DESCRIPTION

The TTL-232-33P is a bi-directional port powered RS232 to 3.3V TTL converter which converts a full-duplex RS232 port to a 3.3V TTL signal. A built-in data direction auto-turnaround feature automatically enables the TTL driver when data is present from the RS232 port, eliminating the need for software drivers, and making the device fully plug-and-play. The TTL-232-33P has a DB9 female connector on the RS232 serial port, and DB9 male connector on the TTL port. A separate terminal block is included with the product. The terminal blocks plugs into the TTL port, providing screw-lug wire terminations for the port. The unit is enclosed in a rugged ABS housing, and is powered from the RS232 data lines; no external power is required. This converter operates from 300 to 115,200 bps.

TTL VOLTAGE LEVELS

TTL INPUT TTL OUTPUT
HIGH (>2.0) HIGH (3.3V)
LOW (<0.8)< /td> LOW (0.0V)

FEATURES

  • Plug-and-Play (Hot-pluggable)
  • Port Powered - No External Power Needed
  • Data Direction Auto-turnaround - No Flow Control is Necessary
  • Built-in 600W Surge and 15KV Static Protection
  • 5 Year Manufacturer's Warranty
  • RoHS 3, CE, FCC and REACH Certified
RS232 to 3.3V TTL converter
RS232 to 3.3V TTL converter plus block
PRICE: $16.95

IN STOCK

30 Day Money Back Guarantee!

5 Year Replacement Warranty!

ISO 9001:2015 QUALITY MANAGEMENT

ISO-9001:2015

Our internationally recognized ISO 9001:2015 Quality Management System (Cert. No. 743003912) with a scope of “Design, Sales, Distribution of Data Communication and IT Support Services“ was recognized and certified by TÜV Rheinland of North America known for its very demanding and stringent requirements. For more details see our Quality Policy.

COMMUNICATION
STANDARDS: EIA/TIA RS-232C Standard
BAUD RATES: From 300 bps To 115,200 bps
CONNECTOR TYPES: RS-232 Side: DB9 Female and TTL Side: either DB9 Male or 5 Way Terminal Block
DISTANCE: RS-232 Side: 16 ft (5m) and TTL Side: up to 10 ft (3m)
ELECTRICAL
POWER SOURCE: Port Powered From RS-232 Data Lines
CURRENT CONSUMPTION: Less Than 10 mA
STATIC PROTECTION: 15KV Electric Static Discharge (ESD) Protection
SURGE PROTECTION: 600W Surge Protection
CONVERSION IC: Exar SP3220EEA - For more information from Exar; follow this link;
MECHANICAL
HOUSING: Rugged ABS
WEIGHT: With Terminal Block: 1.2oz (36 grams)
Without Terminal Block: 0.8oz (24 grams)
DIMENSIONS: With Terminal Block: 3.16 X 1.32 X 0.73 in (80.3 X 33.4 X 18.6 mm)
Without Terminal Block: 2.47 X 1.33 X 0.70 in (62.8 X 33.8 X 17.8 mm)
ENVIRONMENTAL
OPERATING TEMP.: -4ºF to 140ºF (-20ºC to 60ºC)
STORAGE TEMP.: -40ºF to 185ºF (-40ºC to 85ºC)
OPERATING HUMIDITY: 5% To 95% - No Condensation
QUALITY
PRODUCT SAFETY: CE, FCC and RoHS Conformance Certified
QUALITY MANAGEMENT: Manufactured and Distributed to ISO 9001:2015 QMS
RELIABILITY: Low Failure Rate - 99+% Reliability Since Inception
WARRANTY: 5 Year Replacement Warranty

RS232 Side DB9 Female

Signal DCD DTR DSR RTS CTS TX RX GND
Pin # 1 4 6 7 8 2 3 5
Function TIED TIED TX RX GND

3.3V TTL Side DB9 Male or Terminal Block

Signal NC TTL IN TTL OUT NC GND
Pin # 1 2 3 4 5
Function NC TTL IN TTL OUT NC GND

Using one TTL-232-33P unit:

  1. Check that all connections comply with the connection diagrams.
  2. Perform a loop back test on one unit:
    1. Connect the IN to OUT on the TTL port.
    2. Connect the RS-232 port to the PC RS-232 port.
    3. Running a hyper terminal program on the PC, send ASCII characters to the TTL-232-33P converter from one PC port, and check that the characters are received at the same PC port. This tests that the transmit and receive functions of the TTL-232-33P unit is working properly.

Using two TTL-232-33P units:

  1. Check that all connections comply with the connection diagrams.
  2. Perform a loop back test on two units:
    1. Connect the two TTL ports.
    2. Connect the two RS-232 ports to two PC RS-232 ports.
    3. Running hyper terminal programs on both PCs, send ASCII characters to the TTL-232-33P converter from one PC port, and check that the characters are received at the 2nd PC port. Repeat the test in the opposite direction. This tests that the transmit and receive functions of both TTL-232-33P units are working properly.

Download FREE FULL VERSION AccessPort Advanced Serial Monitor, Simulation and Data Analysis Software Tool. This software tool is great for testing converters. Supports Windows 98/XP/VISTA/WIN 7/WIN 8/WIN 10.   DOWNLOAD SOFTWARE AND USER MANUAL

Below are some of the RS232 to TTL converter applications.

FIGURE 1: CONNECTING THE RS-232 PORT TO A 3.3V TTL DEVICE

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