The 74LS125 IC package features four independent 3-State Bus Buffers. It is the part of 74XXYY IC series. The 74LS125 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 74LS125 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.
What is a Buffer?
A buffer is a basic logic gate that passes its input, unchanged, to its output. Its behavior is the opposite of a NOT gate. The main purpose of a buffer is to regenerate the input, usually using a strong high and a strong low. A buffer has one input and one output; its output is always equal to its input. Buffers are also used to increase the propagation delay of circuits by driving the large capacitive loads.
74LS125 Key Features & Specifications
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25
- Channels (#): 4
- Operating Voltage (Nom): 5V
- Frequency at normal voltage (Max): 35MHz
- Propagation delay (Max): 20ns
- IOL (Max): 24mA
- IOH (Max):-2.6mA
- Input Type: Bi-polar
- Output type: 3-State
- High speed (tpd 10-50ns)
- Rating: Catalog
- Data rate: 70Mbps
- Available in 14-pin PDIP, GDIP, PDSO packages
74LS125 Pinout
| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | E’ | Active Low Input 1 |
| 2 | D | Active High Input 1 |
| 3 | O | Output pin 1 |
| 4 | E’ | Active Low Input 2 |
| 5 | D | Active High Input 2 |
| 6 | O | Output pin 2 |
| 7 | GND | Ground pin |
| 8 | O | Output pin 3 |
| 9 | D | Active High Input 3 |
| 10 | E’ | Active Low Input 3 |
| 11 | O | Output pin 4 |
| 12 | D | Active High Input 4 |
| 13 | E’ | Active Low Input 4 |
| 14 | Vcc | Chip Supply Voltage |
Applications
The 74LS125 IC has a number of uses , some of them are listed as below:
- High Sink Current Capability.
- Clamping Diodes at Input Simplify System Design.
- Open-Collector Driver for Indicator Lamps and Relays.
74LS125 Datasheet
You can download the 74LS125 Quadruple 3-State Bus Buffer IC from the link given below:
See Also: 74LS02 Quad Two Input NOR Gate | 7404 NOT Gate IC | 74LS02 Quad Two Input NOR Gate
