74HC154 Decoder–Demultiplexer Integrated Circuit DIP‑24

The 74HC154 is a high-speed, Si-gate CMOS 4‑to‑16 line decoder/demultiplexer designed for modern electronics components, embedded systems, and digital logic projects. Housed in a DIP‑24 package for easy prototyping, it delivers low power consumption, wide voltage operating range, and robust noise immunity—ideal for use with Arduino, Raspberry Pi, and other microcontroller platforms and modules.

Key Features ⚙️

• High-speed Si-gate CMOS technology for fast, reliable switching
• 4‑to‑16 line decoder/demultiplexer for efficient address decoding and signal routing
• Active‑LOW outputs (Y0–Y15) simplify wired‑OR and low-side drive schemes
• Two enable inputs (active‑LOW) for gating, cascading, or demultiplexing control
• Low energy usage with minimal static power draw
• Broad operating voltage range for system flexibility
• Superior noise resistance for robust operation in digital systems
• DIP‑24 through‑hole package for breadboards and perfboards

Technical Specifications 📐

• Supply Voltage (VCC): 2.0 V to 6.0 V
• Operating Temperature: −40°C to +125°C
• Package Type: DIP‑24
• Propagation Delay Time: 22 ns (typical)
• Power Dissipation Capacitance (Cpd): 50 pF
• Function: 4 address inputs select one of 16 active‑LOW outputs
• Enable Control: Two active‑LOW enables allow easy cascading and demultiplexing

Typical Applications 🧩

• Memory decoders for address selection
• Data transmission systems and signal demultiplexing
• Control systems and digital logic expansion
• Logic systems requiring one-of-sixteen selection
• Computer servers and embedded address decoding
• Arduino/Raspberry Pi projects: I/O expansion, peripheral selection, LED/relay matrix driving (with appropriate drivers)

Integration Notes for Arduino & Raspberry Pi 🔌

• At VCC = 5 V, outputs switch to 5 V logic highs—use level shifting when interfacing with 3.3 V systems like Raspberry Pi.
• At VCC = 3.3 V, logic thresholds suit many 3.3 V microcontroller platforms.
• Provide local decoupling (e.g., 0.1 µF ceramic capacitor near VCC–GND) for best noise performance.
• Remember outputs are active‑LOW; invert in software/logic if a HIGH-active signal is required.

Why Choose the 74HC154? ✅

• Reliable, high-speed decoding in a simple, breadboard‑friendly DIP‑24 format
• Excellent fit for Arduino, Raspberry Pi, and microcontroller address decoding and signal routing
• Low power and wide voltage operation for flexible electronics modules and systems