描述 Description

General Description
These positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic. All have a direct clear input, and the quad (175) versions feature complementary outputs from each flip-flop.
Information at the D inputs meeting the setup time require ments 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.

特性 Features

■ LS174 contains six flip-flops with single-rail outputs
■ LS175 contains four flip-flops with double-rail outputs
■ Buffered clock and direct clear inputs
■ Individual data input to each flip-flop
■ Applications include:
?? Buffer/storage registers
?? Shift registers
?? Pattern generators
■ Typical clock frequency 40 MHz
■ Typical power dissipation per flip-flop 14 mW
■ Alternate Military/Aerospace device (54LS174, 54LS175) is available. Contact a National Semiconductor Sales Office/Distributor for specifications.