IC 4049 Hex inverter Datasheet – Square wave oscillator

The IC 4049 is a CMOS logic chip. It includes the six independent inverters inside.

We often use them for interfacing. And, make simple clock pulse generators and oscillators.

When connect two in series to make a non-inverting buffer.

The input-signal high level (VIH) can exceed the VCC supply voltage when these devices are used for logic-level conversions. These devices are intended for use as CMOS to DTL/TTL converters and can drive directly two DTL/TTL loads. The Maximum power supply must not exceed 18 volts.

IC-4049 Features

  • Wide supply voltage range: 3V to 15V
  • Direct drive to 2 TTL loads at 5.0V over the full temperature range.
  • High source and sink current capability
  • Special input protection permits input voltage greater than Vdd.

CD4049 Pinout

IC 4049 Hex inverter Datasheet - Square wave oscillator

CD4049 on Amazon.com

The pin assignments of DIP 16 as CD4049



  • CMOS hex inverter
  • CMOS to DTL/TTL hex converter
  • The current “sink” or “source” driver
  • High to the LOW logic level converter.

Note: Please see these circuits use CD4049 as a base::

4049 Square wave oscillator generator

We can bring the inverter CMOS digital IC is IC-4049 Hex Inverting Buffer IC, to design the Square wave oscillator generator circuit diagram or Simple Pulse Generator circuits, to a lot circuit been simplified.

IC 4049 Hex inverter - Square wave oscillator

The circuit we use a little equipment, just add a resistor and capacitor are the only one, It uses less energy. The output frequency is relatively constant, the rate of change in frequency of the power supply voltage is less.

The pulse generators can also produce a 50% duty cycle square wave. The ICs in the circuit number CD4069, TC4069, LM4069.

The frequency determined by R1 and C1 is F = 1 / (1.39xRxC). The power supply used DC 3V-12Volt.

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5 thoughts on “IC 4049 Hex inverter Datasheet – Square wave oscillator”

  1. This site is facinating. Pls i will need a help in building my own inverter. I have the circuit but i need for efficient pulse generator with a variable resistor to control the trigger speed to the thyristor gate

  2. Could you please be specific re the frequencies – I need a variable range of 1.9 MHz to 2.35 MHz. Also – an amplitude of 9 volt. What would be the average current in such a case? Thanks.

  3. i need to build a square wave generator that has 3 pots in its schematic and uses a 741 op amp IC. if i say i don’t want to use the 741 is the any IC i can use and still achieve same results?

  4. I need to build a circuit contain a crystal oscillator square wave with 10 : 90 MHZ with 12 V input and contain all methods to controlling increase and decrease i.e up and down the output signal in MHZ to take it after that to opp orate the required Load


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