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• Synchronous Up/Down BCD Decade Counter, Count is Updated with Low-to-High Clock Transition
• Synchronous Counting
• High Speed up to 25MHz
• Individual Preset Inputs
• Standard TTL Switching Voltages

• Single 8-bit Shift Register with Gated Serial Inputs and Asynchronous Clear
• Fully Buffered Clock
• Clock Frequency up to 36MHz
• Operating Temperature up to 70oC
• Standard TTL Switching Voltages

• Two Independent Two-of-Four Decoders Based Upon the Select Inputs
• Inputs Clamped with Schottky Diodes
• Designed for Memory Decoders and Data Transmission Systems
• Operating Temperature up to 70oC
• Standard TTL Switching Voltages

• Designed specifically for high speed:
• Memory decoders
• Data transmission systems
• DM74LS138 3-to-8-line decoders incorporates 3 enable inputs to simplify cascading and/or data reception
• Schottky clamped for high performance

7493 – 4-bit Binary Counter

• 74LS109, Dual J-K Positive-edge-triggered Flip-Flops