Overview
The MC74AC4040DG, produced by onsemi, is a 12-stage binary ripple counter integrated circuit. It consists of 12 master-slave flip-flops, where the output of each flip-flop feeds the next, and the frequency at each output is half that of the preceding one. The counter advances on the negative-going edge of the Clock input, and the Reset is asynchronous and active-high. This device is particularly useful in digital circuits requiring sequential counting and timing functions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | −0.5 to +7.0 | V |
| DC Input Voltage (VI) | −0.5 ≤ VCC +0.5 | V |
| DC Output Voltage (VO) | −0.5 ≤ VCC +0.5 | V |
| Typical Clock Frequency | 140 MHz | |
| Output Source/Sink Current | 24 mA | mA |
| Operating Voltage Range | 2.0 to 6.0 V | V |
| Storage Temperature Range | −65 to +150 °C | °C |
| Lead Temperature (1 mm from Case for 10 Seconds) | 260 °C | °C |
| Junction Temperature under Bias | +150 °C | °C |
| Thermal Resistance (JA) | 69.1 °C/W | °C/W |
| Power Dissipation in Still Air at 65°C | 500 mW | mW |
Key Features
- 12-stage binary ripple counter with master-slave flip-flops.
- Typical clock frequency of 140 MHz.
- Outputs can source/sink up to 24 mA.
- Operating voltage range from 2.0 to 6.0 V.
- High noise immunity.
- Pb-free packages available.
- Asynchronous and active-high Reset.
- State changes of the Q outputs do not occur simultaneously due to internal ripple delays.
Applications
The MC74AC4040DG is suitable for various digital circuit applications, including:
- Sequential counting and timing circuits.
- Frequency division and clock signal generation.
- Digital counters and timers in industrial control systems.
- Automated systems requiring precise timing and counting functions.
Q & A
- What is the typical clock frequency of the MC74AC4040DG?
The typical clock frequency is 140 MHz. - What is the operating voltage range of the MC74AC4040DG?
The operating voltage range is from 2.0 to 6.0 V. - How does the counter advance in the MC74AC4040DG?
The counter advances on the negative-going edge of the Clock input. - What type of reset does the MC74AC4040DG have?
The reset is asynchronous and active-high. - Can the MC74AC4040DG handle high noise environments?
Yes, it has high noise immunity. - What is the maximum output current of the MC74AC4040DG?
The outputs can source/sink up to 24 mA. - Is the MC74AC4040DG available in Pb-free packages?
Yes, Pb-free packages are available. - What are the storage temperature limits for the MC74AC4040DG?
The storage temperature range is −65 to +150 °C. - How many flip-flops does the MC74AC4040DG contain?
The device contains 12 master-slave flip-flops. - What are the potential issues with decoded output signals in the MC74AC4040DG?
Decoded output signals may be subject to decoding spikes due to internal ripple delays and may need to be gated with the Clock for some designs.
