7475 / 74LS75 4-Bit Bistable Latch
The 7475 / 74LS75 4-Bit Bistable Latch is a widely used IC designed for temporary data storage in digital systems. Operating on TTL logic with low power consumption, it contains four latches, each capable of storing one bit of data. These latches operate in transparent mode, meaning the output follows the input when enabled, and latches the data when the enable signal is turned off.
Its fast response time, noise immunity, and robust operation make it suitable for buffering data between microprocessors and slower peripherals, managing control signals, or acting as temporary memory in digital logic systems.
🛠 Technical Details
| Specification | Details |
|---|---|
| IC Type | Quad 4-bit Bistable Latch |
| Logic Family | TTL (Low Power Schottky) |
| Supply Voltage (Vcc) | 4.75V – 5.25V |
| Inputs | D (Data), G (Enable) |
| Outputs | Q and Q̅ (Complementary) |
| Propagation Delay | 15ns – 25ns (typical) |
| Package Type | DIP-16 |
| Operating Temp | 0°C to 70°C |
| Mount Type | Through-hole |
💡 Use Cases & Applications
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📦 Memory Buffering & Storage
Temporarily holds data between microcontroller and memory systems. -
🕹️ Digital Control Panels
Retains control signals in logic-based switching or programmable control systems. -
📐 Clocked Logic Circuits
Ideal for edge-triggered or clocked signal buffering and timing sequences. -
🎓 Educational Kits & Labs
A staple in digital electronics and logic design coursework for hands-on learning. -
🧠 Microcontroller Interfacing
Acts as an interface between fast CPU cycles and slower I/O devices. -
📊 Data Bus Control
Helps isolate or buffer data lines in digital bus systems to prevent contention.
🛠️ Pair With
🎥 YouTube Tutorial
📺 Learn how transparent latches like 74LS75 work in logic design:
👉 Watch Tutorial
⚠️ Precautions & Tips
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🔋 Operate strictly within the 5V TTL range to avoid IC malfunction.
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⚠️ Use pull-down resistors or buffers when interfacing with CMOS logic.
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📏 Ensure clean input signals to prevent unintended state changes.
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🛠️ Avoid floating inputs – always tie unused inputs to GND or Vcc via resistors.
🏁 Summary & Call-to-Action
The 74LS75 is a dependable 4-bit latch solution for engineers, students, and developers looking to manage real-time data in logic circuits. Its transparent latching and dual-output format make it a powerful tool in any digital design toolkit.
🛒 Order now from Electroway and power your next digital project with precision.
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