The 7406 (ex 74LS06) is a chip with six open-collector inverters that has a maximum output voltage of 30V and a sink current of 40 mA so that they can interface with high-level circuits (such as MOSFETs), or for driving high-current loads.
When you have an
open collector
output, it means its easy to connect it to other chips that use different logic levels. However, it also means you cant just swap it out with a regular inverter chip.
In this guide, you will learn everything you need to know about this chip and how to use inverters in your projects.
Package and pinout for 7406
What does the 74HC06 / 74LS06 do?
The 7406 gives you six open collector inverters that you can use individually. Aninverter (or NOT gate)is alogic gatethat outputs the opposite of the input. In the truth table below, you can see what the output will be for any given input:
Truth table for the NOT gate (inverter)
How To Use This Chip
The 74LS06 comes in a 14-pin package, and you need to connect it to power before you can use it. Most 7400 ICs support a VCC voltage of 5V. One difference between the HC and LS versions of the chip is that the 74HC06 supports 2V to 6V, while the 74LS06 only supports 5V.
7406 Pinout
The 7406 has 14 pins and contains six open-collector inverters, each with a maximum output voltage of 30V. Its pins are laid out as shown in the pinout diagram below:
Pin #
Type
Description
1
Input
Input to the first NOT gate.
2
Output
Open-collector output from the first NOT gate.
3
Input
Input to the second NOT gate.
4
Output
Open-collector output from the second NOT gate.
5
Input
Input to the third NOT gate.
6
Output
Open-collector output from the third NOT gate.
7
Power
Connect to ground (GND).
8
Output
Open-collector output from the fourth NOT gate.
9
Input
Input to the fourth NOT gate.
10
Output
Open-collector output from the fifth NOT gate.
11
Input
Input to the fifth NOT gate.
12
Output
Open-collector output from the sixth NOT gate.
13
Input
Input to the sixth NOT gate.
14
Power
Positive power supply (VCC). Connect to +5V power.
Technical Specifications
Physical
Case/Package
PDIP
Mount
Through Hole
Number of Pins
14
Technical
High Level Output Current
-250 A
Logic Function
Buffer, Inverter, Inverting
Low Level Output Current
40 mA
Max Operating Temperature
70 C
Max Supply Voltage
5.25 V
Min Operating Temperature
0 C
Min Supply Voltage
4.75 V
Nominal Supply Current
100 A
Number of Bits
6
Number of Channels
6
Number of Circuits
6
Number of Elements
6
Number of Gates
6
Number of Input Lines
6
Number of Inputs
1
Number of Output Lines
6
Number of Outputs
6
Operating Supply Current
100 A
Operating Supply Voltage
5 V
Polarity
Inverting
Propagation Delay
20 ns
Schmitt Trigger Input
No
Termination
Through Hole
Turn-On Delay Time
20 ns
7406 Datasheet
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