National Semiconductor 74LS74ASC
| Parameters | |
|---|---|
| Series | 74LS |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| RoHS Status | Not applicable |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mfr | National Semiconductor |
| Mounting Type | Surface Mount |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Type | D-Type |
| Output Type | Complementary |
| Number of Elements | 2 |
| Supplier Device Package | 14-SOIC |
| Number of Bits per Element | 1 |
| Function | Set(Preset) and Reset |
| Voltage - Supply | 4.75V ~ 5.25V |
| Clock Frequency | 20 MHz |
| Trigger Type | Positive Edge |
| Current - Output High, Low | 8mA, 400µA |
| Max Propagation Delay @ V, Max CL | 35ns @ 5V, 50pF |
| Current - Quiescent (Iq) | 8 mA |
| Package | Bulk |
| Product Status | Active |
| Base Product Number | 74LS74 |
| REACH Status | Vendor Undefined |
| Standard Package | 1 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
The National Semiconductor 74LS74ASC is a dual-D positive edge-triggered trigger of the 74LS series with set and reset functions. This chip is favored for its high-speed
operation and low power consumption, and is widely used in various digital circuit designs. The 74LS74ASC comes in a 14-pin SOIC package with an operating voltage
range of 4.75V to 5.25V and a clock rate of up to 20MHz. Each of its triggers is a 1-bit D-trigger with complementary outputs and support for rising edge triggers. The
chip has a maximum propagation delay of 35ns (at 5V supply and 50pF load), a static current of 8mA, and has a 400uA feed current and 8mA pull current capability.
Operating temperature range is 0 ° C to +70 ° C, suitable for industrial applications.
74LS74ASC Features:
- Dual Type D trigger design, providing two independent data storage units.
- Positive edge trigger mechanism ensures that data is accurately captured at the rising edge of the clock signal.
- Set and Reset functions allow control of the trigger state.
- Complementary output, providing direct positive and negative logic status indication.
- Low power operation, suitable for battery powered or power sensitive applications.
- Fast propagation delay, suitable for high-speed digital circuits.
74LS74ASC Application:
74LS74ASC has a wide range of applications in digital circuit design, including but not limited to:
1. Clock divider: Used to generate a slow clock signal.
2. Pulse shaping: clean up irregular pulse signals to ensure the integrity of signals.
3. Counter: Build a synchronous counter circuit for counting or timing.
4. Register: stores and transfers digital data.
5. State control: Control state changes in complex logic circuits.
