SN74AHC74Q-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• AEC-Q100 qualified for automotive applications:

– Device temperature grade 1: -40°C to +125°C

– Device HBM ESD classification level 2

– Device CDM ESD classification level C4B

• Available in wettable flank QFN package

• Operating range 2-V to 5.5-V VCC

• Latch-up performance exceeds 250 mA

per JESD 17

2 Applications

• Convert a momentary switch to a toggle switch

• Hold a signal during controller reset

• Divide a clock signal by two

3 Description

The SN74AHC74Q-Q1 dual positive-edge-triggered

device is a D-type flip-flop.

A low level at the preset (PRE) or clear (CLR) inputs

sets or resets the outputs, regardless of the levels

of the other inputs. When PRE and CLR are inactive

(high), data at the data (D) input meeting the setup

time requirements is transferred to the outputs on

the positive-going edge of the clock pulse. Clock

triggering occurs at a voltage level and is not directly

related to the rise time of the clock pulse. Following

the hold-time interval, data at the D input can be

changed without affecting the levels at the outputs.