Logic Level Converter – Single Supply (PRT-14765)

(2 customer reviews)

£18.00 inc VAT

Availability: 1 in stock (can be backordered)

Brand: SparkFun
Part Number: PRT-14765
Barcode: 5055421086794
SKU: PPPRT-14765 Categories: , , ,
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Logic Level Converter – Single Supply – Sparkfun PRT-14765

This Single Supply Logic Level Converter is a logic level and power supply translator on a small and neat breakout board.

This board breaks out the Texas Instruments TXB0104 4-bit bi-directional voltage-level translator with automatic direction sensing. With this logic level converter, you will be able to use your 5V logic microcontroller with 3.3V sensors without the second power supply!

What makes this Logic level converter truly special is the fact that you can supply it with 3.3V and it will create the 5V – meaning you can use your 3.3V system, and convert directly to another 5V sensor – and even power your sensor or other board!

This logic level converter provides 5V to the high side of the TXB0104 and the low side is programmable to 3.3V, 2.5V, and 1.8V. Please keep in mind that the default low side voltage is 3.3V.

Logic Level Converter Dimensions:

  • Length: 27.9mm (1.1″)
  • Width: 25.4mm (1″)

Logic Level Converter Dimensions

Logic Level Converter Schematic:

Logic Level Converter Schematic

Single Supply Logic Level Converter Pin Out:

The Single Supply Logic Level Converter combines a boost converter (TPS61200), adjustable voltage regulator (MIC5205), and logic level translator (TXB0104) into one board. It provides 5V to the high side of the TXB0104 and the low side is programmable to 3.3V, 2.5V, and 1.8V. The default low side voltage is 3.3V. With this device, you can use your 5V microcontroller with 3.3V sensors and vice versa without the need for a second power supply! What makes this logic level converter truly special is the fact that you can supply it with 3.3V and it will boost it to 5V – meaning you can use your 3.3V system, and convert directly to another 5V sensor – and even power your sensor or other board! We will use a 3.3V microcontroller and a 5V sensor for the example. However, you can use still this board with a 5V microcontroller and a 3.3V sensor.

Logic Level Converter - Single Supply - Sparkfun PRT-14765 Top side

PinDescription
VINInput Supply Voltage (3V – 5.5V)
GNDGround
VOUT, 5VBoost Converter’s Voltage Output Set to 5V
VOUT, 3.3VRegulated Voltage Output Set to 3.3V
(can be adjusted depending on resistor)
A1-A4Programmable VCCA Port for Lower TTL Logic Levels –  Default = 3.3V
B1-B4VCCB Port for Higher TTL Logic Levels –  Set to 5V

Each pin on this module is broken out for you to easily access ports A and B. Port A (A1-A4) is for low side TTL levels. This device’s VCCA is set to 3.3V by default but can easily be programmable with a resistor to 2.5V and 1.8V. Port B (B1-B4) is for high side TTL levels. VCCB is hard wired to 5V. VCCA should not exceed VCCB. Depending on which voltage is chosen for VCCA the data rate may vary.

Adjusting the Lower Voltage Side:

To adjust the reference voltage for the low side, you will need an associated resistor value to adjust the MIC5205’s output voltage. Below is a table of calculated resistor values that can be used.

VCCAResistor Value
3.3VDefault = 13kΩ
2.5V22kΩ
1.8V49kΩ

Sparkfun Video Introduction:

Product Showcase: SparkFun Single Supply Logic Level Converter

Documents:

  • TPS61200 Datasheet (Low Input Voltage Synchronous Boost Converter With 1.3-A Switches)
  • TXB0104 Datasheet (4-Bit Bidirectional voltage-level Translator With Automatic Direction Sensing and ±15-kV ESD Protection)

2 reviews for Logic Level Converter – Single Supply (PRT-14765)

  1. Jason

    Well designed board and easy to use

  2. Mark Gillespie

    Well made board, worked with no issues with my Arduino Mkr.

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