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What is the function of enable pins?
The purpose of an enable pin is to allow disabling the part (or some function of it) when you do not need it.
What are enable pins?
L293D has an enable facility which helps you enable the IC output pins. If an enable pin is set to logic high, then state of the inputs match the state of the outputs. If you pull this low, then the outputs will be turned off regardless of the input states. Another major feature of L293D is its internal clamp diodes.
How many pins in IC can have?
The pins are numbered anti-clockwise around the IC (chip) starting near the notch or dot. The diagrams show the numbering for 8-pin and 14-pin ICs, but the principle is the same for all sizes.
What is the output pin of the IC?
Most integrated circuits typically have a ground pin. Pin 2 – The trigger pin is the input. When this pin gets connected to ground, it triggers the output to turn on at the supply voltage. Pin 3 – The output is where the result of the chips inner workings is output.
Why we use enable input?
An Enable will allow an input signal, shown in green, to pass the output, shown in red, when the control signal is high. It will prevent a signal from passing when the control signal is switched to low.
How many output pins in l293 are connected to the DC motor?
1.3 L293D IC Pin Out The L293D is a 16 pin IC, with eight pins, on each side, to controlling of two DC motor simultaneously. There are 4 INPUT pins, 4 OUTPUT pins and 2 ENABLE pin for each motor. Pin 1: When Enable1/2 is HIGH, Left part of IC will work, i.e motor connected with pin 3 and pin 6 will rotate.
How is enable pin used in 74ls138 decoder?
74LS138 is used in de-multiplexing applications by using enable pin as data input pin. Also the chip inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design.
What’s the difference between 8 and 14 pin ICS?
The diagrams show the numbering for 8-pin and 14-pin ICs, but the principle is the same for all sizes. ICs are easily damaged by heat when soldering and their short pins cannot be protected with a heat sink. Instead we use an IC holder, strictly called a DIL socket (DIL = Dual In-Line), which can be safely soldered onto the circuit board.
How many logic ICs can be driven by one output?
The number of logic IC inputs which can be driven by one output of the same family is called the fan out . Usually 50 (10 for 74LS), it is unlikely to matter in simple circuits. For more details of the logic IC families, including pin arrangements for many ICs, please see these pages: To switch larger currents use a transistor.
How are short pins protected in an IC socket?
IC holders (DIL sockets) ICs are easily damaged by heat when soldering and their short pins cannot be protected with a heat sink. Instead we use an IC holder, strictly called a DIL socket (DIL = Dual In-Line), which can be safely soldered onto the circuit board. The IC is pushed into the holder when all soldering is complete.