74HCT4040D数据手册集成电路（IC）的计数器除法器规格书PDF

描述 Description

The 74HC4040; 74HCT4040 is a 12-stage binary ripple counter with a clock input (CP), an overriding asynchronous master reset input (MR) and twelve parallel outputs (Q0 to Q11). The counter advances on the HIGH-to-LOW transition of CP. A HIGH on MR clears all counter stages and forces all outputs LOW, independent of the state of CP. Each counter stage is a static toggle flip-flop. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

特性 Features

• Complies with JEDEC standard no. 7A
• Input levels:
• For 74HC4040: CMOS level
• For 74HCT4040: TTL level

• ESD protection:
• HBM JESD22-A114F exceeds 2000 V
• MM JESD22-A115-A exceeds 200 V

• Multiple package options
• Specified from -40 °C to +85 °C and from -40 °C to +125 °C

应用 Application

• Frequency dividing circuits
• Time delay circuits
• Control counters