Overview: SN74LS273 Octal D-Type Flip-Flop with Clear
The SN74LS273 by Texas Instruments is an octal positive-edge-triggered D-type flip-flop with a common clock and asynchronous clear. This IC is designed for use in general-purpose register and latch applications, particularly where high-speed and low-power logic are required.
With its TTL-compatible inputs and outputs, the device supports standard logic-level interfacing. The SN74LS273 is commonly utilized in systems where parallel data storage, synchronization, and sequential logic functions are critical.
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Key Electrical and Package Parameters
| Parameter | Value | Unit |
|---|---|---|
| Function | Octal D-Type Flip-Flop with Clear | – |
| Package | DIP-20 | – |
| Logic Type | TTL | – |
| Edge Trigger | Positive | – |
| Clear Function | Asynchronous | – |
| Input Type | TTL-Compatible | – |
| Output Type | TTL-Compatible | – |
| Pin Count | 20 | – |
| Mounting | Through Hole | – |
Advantages Over Comparable Logic Devices
Unlike individual flip-flop ICs or discrete logic designs, the SN74LS273 consolidates eight flip-flops into a single package. This improves layout efficiency and simplifies PCB design. Its asynchronous clear input allows all outputs to be reset independently of the clock, a feature critical for initializing registers in embedded processors and logic control.
Its compatibility with TTL logic simplifies interfacing with microcontrollers, FPGAs, and other logic devices. Designers value the SN74LS273 for applications where reliable data latching and fast triggering are necessary.
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Engineers across industrial, consumer, and communication domains recommend the SN74LS273 due to its combination of compactness, speed, and trusted performance. Available via IC Manufacturer, it continues to be a cornerstone logic component in modern digital systems.
Detailed Technical Parameters
| Feature | Description |
|---|---|
| Logic Family | LS (Low Power Schottky) |
| Type | D-Type Flip-Flop |
| Channels | 8 (Octal) |
| Clock Type | Positive Edge |
| Clear Function | Asynchronous |
| Input Logic | TTL-Compatible |
| Output Logic | TTL-Compatible |
| Operating Voltage | 5V Typical |
| Package | DIP-20 |
| Temperature Range | 0 to 70 |
Typical Applications
- Data latching in address and control bus systems
- Parallel data storage for microprocessor-based devices
- Flip-flop registers in communication buffers
- State machine design for embedded systems
- Control registers in industrial logic controllers
Frequently Asked Questions (FAQ)
What type of flip-flop is used in the SN74LS273?
It uses eight positive-edge-triggered D-type flip-flops to store and transfer data on each rising clock edge.
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Can this IC be cleared independently of the clock?
Yes. The asynchronous clear input allows resetting all outputs to LOW regardless of the clock state, providing quick initialization capability.
What makes the SN74LS273 suitable for address latching?
Its 8-bit width, synchronous data capture, and TTL compatibility make it ideal for temporarily storing address values during bus operations.
Is this IC only suitable for industrial uses?
No, it’s widely used in consumer electronics, data systems, and test instruments where efficient, high-speed logic storage is essential.
What benefits does DIP-20 packaging offer?
DIP-20 supports straightforward prototyping and durable mounting for long-term, high-reliability use in embedded or controller-based designs.
