Description:
Most of our customers love using the Arduino for prototyping, design and
invention but find themselves stuck when trying to connect the Arduino
to the latest sensors, displays, controllers, interfaces, etc. as they
are almost all 3.3V logic these days. We try to solve this problem by
having all our breakout boards be 5V compatible or when that's not
possible, including a level shifter chip but there are still thousands
of tempting devices out there.
This chip solves the problem of
how to interface 3.3V logic devices to a 5.0V logic chip such as the
Arduino. Most 3.3V devices do not like being run with 5V signals and can
be damaged or flaky. The 74LVC245 is designed so that even when it runs
at 1.8V, it still happily accepts 5V signals in one pin and converts it
to a lower logic level on the opposite pin. This chip is only for
digital signals, it doesn't convert analog signals (you need an op amp
for that). It has 8 pipes it can convert but it won't work with
bi-directional/pull-up based devices such as I2C or 1-Wire. It does work
great for SPI, Serial, Parallel bus, and other logic interfaces.
Using it is simple. We suggest checking out the 74LVC245 datasheet
for details but essentially: connect VCC to your logic level you want
to convert to (say 3.3V), Ground connects to Ground. Wire OE (output
enable) to ground to enable the device and DIR (direction) to VCC. Then
digital logic on the A pins up to 5V will appear on the B pins shifted
down to the VCC logic.
Technical Details:
74LVC245 - Breadboard Friendly 8-bit Logic Level Shifter
- Brand: manufacturer
- Product Code: SN74LVC245AN
- Availability: In Stock
-
16.80 AED
- Ex Tax: 16.00 AED