The TC74ACT163 is a synchronous 4-bit binary counter featuring a synchronous clear input for predictable state initialization. All state changes are synchronized to the rising edge of the clock (CLK) input, providing reliable and predictable operation in digital systems. The device offers both parallel load and count enable features, allowing for versatile counting applications. Ripple Carry Output (RCO) simplifies cascading multiple counters for extended counting ranges.

Applications

• Frequency dividers
• Address generation in memory systems
• Timing and control circuits
• Sequence generators
• Digital clocks and timers

Features

• Synchronous counting and clear
• Parallel load capability
• Count enable inputs (CEP, CET)
• Ripple carry output (RCO) for cascading
• High-speed operation
• TTL compatible inputs

Benefits

• Precise and predictable counting operation
• Flexibility in presetting the counter value
• Easy expansion to higher counting ranges
• Reduced system complexity and component count
• High-speed performance for demanding applications

Additional Details

The TC74ACT163 utilizes a 16-pin package. The counter advances on the rising edge of the clock pulse when both Count Enable inputs (CEP and CET) are in the high state. Clearing the counter is accomplished synchronously by holding the Clear (CLR) input low, independent of the clock. Parallel loading is enabled when the Load (LD) input is held low; the data on the A, B, C, and D inputs is loaded into the counter on the next rising clock edge. The Ripple Carry Output (RCO) goes high when the counter reaches its maximum count (15) and CET is high. This output can be used to enable the next stage in a cascaded counter configuration. This device operates with a supply voltage between 4.5V and 5.5V.