74LS94 Dual 4-Bit 4-Bit Serial In-Out Shift Register IC is a part of the 74XXYY IC series. The 74LS94 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 74LS94 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.
What is a Shift Register?
Shift registers are digital memory circuitry found in devices such as calculators, computers, and data processing systems. With the shift register, data or bits are entered into the system in a serial or parallel manner. data entry is done from one direction, and as more data is added, shift positions until they get to the output end. The two ends are referred to as the left and right end. Movement of data can be from left to right, from right to left, or in both directions to make a bidirectional register.
74LS94 Key Features & Specifications
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25
- Bits (#): 2
- Operating Voltage (Nom): 5V
- Frequency at normal voltage (Max): 35MHz
- Propagation delay (Max): 35ns
- IOL (Max): 16mA
- IOH (Max):-0.4mA
- Rating: Catalog
- Available in 14-pin PDIP, GDIP, PDSO packages
74LS94 Pinout
Pin Name | Pin No. | Description |
---|---|---|
P1A | 1 | preset input 1A |
P1B | 2 | preset input 1B |
P1C | 3 | preset input 1C |
P1D | 4 | preset input 1D |
VCC | 5 | Chip Supply Voltage |
PE1 | 6 | Preset Enable pin 1 |
DS | 7 | Serial Data Pin |
CLK | 8 | Clock Input |
OUT | 9 | Output Pin |
CLR | 10 | Clear pin |
P2D | 11 | preset input 2D |
GND | 12 | Ground Pin |
P2C | 13 | preset input 2C |
P2B | 14 | preset input 2B |
PE2 | 15 | Preset Enable pin 2 |
P2A | 16 | preset input 2A |
Applications
The 74LS94 IC has a number applications, a few are listed below:
- Used in expanding the GPIO pin on an MCU/MPU
- LED Matrix/Cube Projects
- Interface LCD
- Cascading applications
- High logic level controller
74LS94 Datasheet
You can download the 4-Bit Serial In-Out Shift Register IC Datasheet from the link given below
See Also: 7404 NOT Gate IC | 74LS21 Dual 4 -Input AND Logic Gate IC | 74LS20 Dual 4 – Input NAND IC
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