The M74LS163AP is a Synchronous 4-Bit Binary Counter with Direct Clear, manufactured by Mitsubishi. This device is a synchronous presettable counter featuring a parallel load capability. All flip-flops are clocked simultaneously, allowing for predictable and reliable counting operations. The counter can be cleared asynchronously and can be preset to any desired value.

Applications

• Frequency dividers
• Digital timers
• Address counters
• Sequence generators
• Control circuits

Features

• Synchronous 4-bit binary counter
• Direct clear input
• Parallel load capability
• Synchronous counting
• Low-power Schottky (LS) technology
• Carry output for cascading counters
• TTL compatible inputs and outputs

Benefits

• Provides precise and reliable counting operations
• Allows for flexible initialization with direct clear and parallel load
• Simplifies design with its integrated counting and control functions
• Enables easy cascading for higher-bit counters

Additional Details

The M74LS163AP typically comes in a 16-pin DIP (Dual In-line Package). The counter advances one count on each positive-going clock edge when the count enable inputs (ENP and ENT) are both HIGH. A LOW level on the clear input (CLR) asynchronously resets the counter to zero, regardless of the clock. The parallel load inputs (A, B, C, D) and the load enable input (LOAD) allow the counter to be preset to any desired value synchronously with the clock. The carry output (RCO) goes HIGH when the counter reaches its maximum count (15) and both enable inputs are HIGH, facilitating cascading multiple counters. The synchronous operation ensures that all flip-flops change state simultaneously, eliminating glitches and ensuring reliable operation.