General Description
These monolithic, positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic with a direct clear input.
Information at the D inputs meeting the setup requirements is transferred to the Q outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse. When the clock input is at either the HIGH or LOW level, the D input signal has no effect at the output.

Features
Switching specifications at 50 pF
Switching specifications guaranteed over full temperature and VCC range
Buffer-type outputs and improved AC offer significant advantage over DM74LS273.
Advanced oxide-isolated, ion-implanted Schottky TTL process
Functionally and pin-for-pin compatible with DM74LS273.