74LS27 IC is a member of the 74XXYY IC series. There are three NOR gates in the chip and each gate has three inputs, hence the name Triple 3- Input NOR Gate. The 74LS27 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74LS27 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.
What is a NOR Gate?
An OR gate followed by a NOT gate in a cascade is called a NOR gate. The inclusive NOR (Not – OR) gate has an output that is normally at logic level “1” and only goes “LOW” to a logic level “0” when any of its inputs are at logic level “1”. The Logic NOR Gate is the reverse or complementary form of the inclusive OR gate.
74LS27 Pinout
74LS27 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | A1 | INPUT 1 of GATE 1 |
| 2 | B1 | INPUT 2 of GATE 1 |
| 3 | A2 | INPUT 1 of GATE 2 |
| 4 | B2 | INPUT 2 of GATE 2 |
| 5 | C2 | INPUT 3 of GATE 2 |
| 6 | Y2 | OUTPUT of GATE 2 |
| 7 | GND | Ground Pin |
| 8 | Y3 | OUTPUT of GATE 3 |
| 9 | A3 | INPUT 1 of GATE 3 |
| 10 | B3 | INPUT 2 of GATE 3 |
| 11 | C3 | INPUT 3 of GATE 3 |
| 12 | Y1 | OUTPUT of GATE 1 |
| 13 | C1 | INPUT 3 of GATE 1 |
| 14 | VCC | Supply Voltage |
74LS27 Features & Specs
- Max Supply Voltage 7V
- Max Input Voltage 7V
- TTL outputs
- Maximum ESD: 3.5KV
- Typical Rise Time: 15ns
- Typical Fall Time: 15ns
- Operating voltage range: +4.75V to +5.25V
- Low power consumption
- Operating Free Air Temperature Range 0°C to +70°C
- Storage Temperature Range -65°C to +150°C
Applications
- Digital Electronics
- Servers
- ALUs
- Memory units
You can download this Datasheet for 74LS27 3-Input NOR gate from the link given below:
See Also: S8050 NPN Transistor | 74LS02 Quad Two Input NOR Gate| 7407 Hex Buffer IC
