74LS147 - 10 to 4 Priority Encoder / 74HC147 DIP-IC

74LS147 / 74HC147 10-to-4 Priority Encoder IC (DIP)

The 74LS147 and 74HC147 are 10-to-4 priority encoder integrated circuits. These devices convert 10 active-LOW inputs into a 4-bit binary-coded decimal (BCD) output. Priority decoding ensures that only the highest-order active data line is encoded when multiple inputs are asserted. This mechanism prevents output ambiguity in digital systems. The ICs are supplied in a Dual In-line Package (DIP). This package facilitates integration into breadboards and Printed Circuit Boards (PCBs). The 74LS147 version provides standard TTL compatibility. The 74HC147 version supports CMOS logic levels and exhibits lower power consumption. Both versions offer specified performance characteristics.

Specifications:

• Product Type: Priority Encoder IC
• Model Numbers: 74LS147, 74HC147
• Encoding Type: 10-to-4
• Input Logic: Active-LOW
• Output Format: 4-bit BCD
• Package Type: DIP (Dual In-line Package)
• Logic Family (74LS147): TTL
• Logic Family (74HC147): CMOS
• Priority Decoding: Integrated

Key features and benefits:

• 10-to-4 priority encoding function
• Converts 10 active-LOW inputs to 4-bit BCD output
• Integrated priority decoding logic
• DIP (Dual In-line Package) form factor
• 74LS147 variant for TTL logic compatibility
• 74HC147 variant for CMOS logic levels and reduced power consumption

Applications:

• Digital logic systems
• Data input prioritization
• Microcontroller interfacing
• Keyboard encoding

Frequently Asked Questions:

Q: What is the primary function of a 74LS147 or 74HC147 IC?
A: The 74LS147 and 74HC147 are 10-to-4 priority encoders. They convert 10 active-LOW input lines into a 4-bit binary-coded decimal (BCD) output, prioritizing the highest-order active input.

Q: What is the difference between the 74LS147 and 74HC147 versions?
A: The 74LS147 is designed for standard TTL (Transistor-Transistor Logic) compatibility. The 74HC147 operates with CMOS (Complementary Metal-Oxide-Semiconductor) logic levels and offers lower power consumption.

Q: What does 'priority encoding' mean in the context of these ICs?
A: Priority encoding means that if multiple input lines are active simultaneously, the encoder will only process and output the binary code corresponding to the highest-order active input, ignoring lower-order active inputs.

Package Includes:

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