74LS174中文资料仙童半导体数据手册PDF规格书

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 partic ular 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

■ DM74LS174 contains six flip-flops with single-rail outputs

■ DM74LS175 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