The SMD SN74LS155 is a dual 2-to-4 line decoder/demultiplexer IC in SOP-16 (SOIC-16) surface-mount package, designed for address decoding and data distribution applications in Pakistan. This TTL logic integrated circuit contains two independent 2-to-4 decoders with active-low outputs, providing reliable decoding for memory systems, data routing, and digital control logic. The SMD package enables compact PCB layouts and automated assembly for professional electronics manufacturing and prototyping.

Key Features

• Dual 2-to-4 line decoders provide two independent decoders in one IC
• SOP-16 (SOIC-16) surface-mount package for compact PCB design and automated assembly
• Active-low outputs ideal for chip select and enable signal generation
• TTL-compatible inputs and outputs work with standard 5V logic circuits in Pakistan
• Individual enable inputs for each decoder provide flexible control
• Can function as 1-to-4 demultiplexer with data input capability
• Industry-standard pinout compatible with 74LS155 and 74155 logic families
• RoHS compliant and suitable for lead-free soldering processes

Applications & Use Cases

• Memory address decoding and chip select generation in Pakistan
• Data demultiplexing and signal distribution circuits
• Microcontroller and microprocessor peripheral selection
• Digital control systems and state machine logic
• I/O port expansion and device selection circuits
• Educational electronics and digital logic learning projects
• Industrial automation and control system address decoding

Technical Specifications

• Part Number: SN74LS155 (Texas Instruments)
• Function: Dual 2-to-4 Line Decoder/Demultiplexer
• Number of Decoders: 2 independent 2-to-4 decoders
• Inputs: 2 address inputs per decoder (A0, A1)
• Outputs: 4 active-low outputs per decoder
• Enable Inputs: Individual enable controls for each decoder
• Logic Family: TTL (74LS series - Low-power Schottky)
• Package: SOP-16 / SOIC-16 (Surface Mount)
• Supply Voltage: 5V DC (4.75V to 5.25V typical)
• Input Logic Levels: TTL compatible (VIH ≥2.0V, VIL ≤0.8V)
• Output Logic Levels: TTL compatible (VOH ≥2.7V, VOL ≤0.5V)
• Propagation Delay: Typical 20ns
• Operating Temperature: 0°C to +70°C (commercial grade)
• Pin Count: 16 pins
• Mounting: Surface mount (SMD/SMT)
• Weight: Approx. 0.3g

Why Buy from Digilog.pk?

We provide authentic SN74LS155 and 74LS series decoder ICs in Pakistan at competitive prices. Fast delivery to Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, and across Pakistan with technical support for your digital decoding and demultiplexing projects.