Overview
The MC74ACT574DWR2G, produced by onsemi, is a high-speed, low-power octal D-type flip-flop with 3-state outputs. This component is part of the 74ACT series, known for its TTL-compatible inputs and high performance. It features a buffered common clock (CP) and a buffered common output enable (OE), making it suitable for bus-oriented applications. The device stores the state of its individual D inputs on the LOW-to-HIGH clock transition and provides 3-state outputs that can be enabled or disabled via the OE input.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| VCC (Supply Voltage) | 4.5 to 5.5 | V | |
| VIN (Input Voltage) | −0.5 to VCC + 0.5 | V | |
| VOUT (Output Voltage) | −0.5 to VCC + 0.5 | V | |
| TA (Operating Temperature) | −40 to 85 | °C | |
| fmax (Maximum Clock Frequency) | 100 MHz | VCC = 5.0 V, CL = 50 pF | |
| tPLH (Propagation Delay CP to On) | 2.5 to 11 ns | VCC = 5.0 V, CL = 50 pF | |
| tPHL (Propagation Delay CP to On) | 2.0 to 10 ns | VCC = 5.0 V, CL = 50 pF | |
| IOH (Output Current - High) | −24 mA | ||
| IOL (Output Current - Low) | 24 mA | ||
| ICC (Quiescent Supply Current) | 8.0 to 80 μA | VIN = VCC or GND |
Key Features
- High-speed, low-power octal D-type flip-flop with 3-state outputs.
- Buffered common clock (CP) and buffered common output enable (OE).
- Inputs and outputs on opposite sides of the package, allowing easy interface with microprocessors.
- Useful as input or output port for microprocessors.
- Functionally identical to MC74AC374/74ACT374 except for pinouts.
- 3-state outputs for bus-oriented applications.
- Outputs source/sink 24 mA.
- TTL-compatible inputs for the ′ACT574 version.
- Pb-free packages available.
Applications
- Bus-oriented applications where 3-state outputs are necessary.
- Microprocessor input/output ports.
- High-speed digital circuits requiring low power consumption.
- Memory and register applications.
- General-purpose logic circuits.
Q & A
- What is the MC74ACT574DWR2G used for?
The MC74ACT574DWR2G is used as a high-speed, low-power octal D-type flip-flop with 3-state outputs, suitable for bus-oriented applications and as input/output ports for microprocessors.
- What are the key differences between the MC74AC574 and MC74ACT574?
The MC74ACT574 has TTL-compatible inputs, whereas the MC74AC574 does not. Both are functionally identical otherwise.
- What is the maximum clock frequency of the MC74ACT574DWR2G?
The maximum clock frequency is 100 MHz at VCC = 5.0 V and CL = 50 pF.
- What is the propagation delay from the clock to the output?
The propagation delay (tPLH and tPHL) ranges from 2.0 to 11 ns at VCC = 5.0 V and CL = 50 pF.
- How much current can the outputs source or sink?
The outputs can source or sink up to 24 mA.
- What is the operating temperature range of the MC74ACT574DWR2G?
The operating temperature range is −40 to 85 °C.
- Is the MC74ACT574DWR2G available in Pb-free packages?
- What is the quiescent supply current of the MC74ACT574DWR2G?
The quiescent supply current (ICC) ranges from 8.0 to 80 μA.
- How do the 3-state outputs work?
The 3-state outputs can be enabled or disabled via the OE input. When OE is LOW, the outputs are active; when OE is HIGH, the outputs go to a high impedance state.
- What are the package options for the MC74ACT574DWR2G?
The MC74ACT574DWR2G is available in SOIC-20 and TSSOP-20 packages.
