The 74LS75 feature complementary Q and Q’ outputs from a 4-bit latch, and are available in various 16-pin packages. These circuits are completely compatible with all popular TTL families. The 74LS75 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.
What is a D-Type Latch?
A latch is a device that can be used to store one bit of information. The D latch is used to capture, or ‘latch’ the logic level which is present on the Data line when the clock input is high. If the data on the D line changes state while the clock pulse is high, then the output, Q, follows the input, D. When the CLK input falls to logic 0, the last state of the D input is trapped and held in the latch.
74LS75 Pinout
74LS75 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | Q0′ | Active low output Q0′ |
| 2 | D0 | Input pin D0 |
| 3 | D1 | Input pin D1 |
| 4 | E(2-3) | Enable pin (bit 2-3) |
| 5 | VCC | supply voltage |
| 6 | D2 | Input pin D2 |
| 7 | D3 | Input pin D3 |
| 8 | Q3′ | Active low output Q3′ |
| 9 | Q3 | Active high output Q3 |
| 10 | Q2 | Active high output Q2 |
| 11 | Q2′ | Active low output Q2′ |
| 12 | GND | Ground Pin |
| 13 | E(0-1) | Enable pin (bit 0-1) |
| 14 | Q1′ | Active low output Q1′ |
| 15 | Q1 | Active high output Q1 |
| 16 | Q0 | Active high output Q0 |
74LS75 Features & Specifications
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25V
- Bits (#): 4
- Voltage (Nom): 5V
- Frequency at operating voltage (Max): 35MHz
- Propagation delay (Max): 40ns
- IOL (Max): 8mA
- IOH (Max): -0.4mA
- 3-state output: No
- Operating temperature range (C): 0 to 70
Applications
- It is usually used in devices such as displays for calculators, digital watches & displays, etc.
- They are also used in digital clocks, electronic meters, and other electronic devices that display numerical information.
You can download this Datasheet for 74LS75 4-Bit Bi-Stable D-Type Latch from the link given below:
See Also: 74LS20 Dual 4 – Input NAND IC | 74LS02 Quad Two Input NOR Gate| 7407 Hex Buffer IC
