Description
What does the 74LS32 do?
The 74×32 gives you four basic OR gates that can be used individually. An OR gate is a logic gate that outputs 1 (HIGH) if one of its inputs are 1 (HIGH). In the truth table below, you can see what the output will be for any given input:
The truth table for the OR gate
How To Use This Chip
Like every other chip in the 7400 series, this IC needs to be connected 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 74HC32 supports 2V to 6V, while the 74LS32 supports only 5V.
Once it’s connected, you can use any of the four basic OR gates inside.
The 74HC32/74LS32 IC connected to power
Output Current
74HC32:
Each gate output of the 74HC32 can sink or source 4 mA when powered with 5V.
74LS32:
HIGH-Level Output Current: 0.4 mA
LOW-Level Output Current: 8 mA
74×32 Pinout
The 74×32 has 14 pins and contains four basic OR gates laid out as shown in the pinout diagram below:
Pin Name
Pin #
Type
Description
1A
1
Input
Input to the first OR gate.
1B
2
Input
Input to the first OR gate.
1Y
3
Output
Output from the first OR gate.
2A
4
Input
Input to the second OR gate.
2B
5
Input
Input to the second OR gate.
2Y
6
Output
Output from the second OR gate.
GND
7
Power
Connect to ground.
3Y
8
Output
Output from the third OR gate.
3A
9
Input
Input to the third OR gate.
3B
10
Input
Input to the third OR gate.
4Y
11
Output
Output from the fourth OR gate.
4A
12
Input
Input to the fourth OR gate.
4B
13
Input
Input to the fourth OR gate.
VCC
14
Power
Positive power supply. Connect to +5V power.
Specifications
Product Attribute
Attribute Value
Product Category:
Logic Gates
Product:
Single-Function Gates
Logic Function:
OR
Number of Gates:
4 Gate
Number of Input Lines:
8 Input
Number of Output Lines:
4 Output
High Level Output Current:
– 400 uA
Low Level Output Current:
8 mA
Propagation Delay Time:
14 ns
Supply Voltage – Max:
5.25 V
Supply Voltage – Min:
4.75 V
Minimum Operating Temperature:
0 C
Maximum Operating Temperature:
+ 70 C
Mounting Style:
Through Hole
Package/Case:
PDIP-14
Logic Type:
2-Input OR
Number of Bits:
4 bit
Operating Supply Current:
38 uA
Operating Supply Voltage:
5 V
Operating Temperature Range:
0 C to + 70 C
Output Type:
TTL
Applications:
Basic Logic Circuits
Encoders and Decoders
Multiplexers and De-multiplexers
Oscillator circuits
Networking and Digital Systems
Component Datasheet
7432 Datasheet
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