Overview
The SN74ACT74DRE4 is a dual positive-edge-triggered D-type flip-flop integrated circuit produced by Texas Instruments. This device is part of the ACT74 series, known for its high-speed and low-power consumption characteristics. The SN74ACT74DRE4 is designed to operate within a supply voltage range of 4.5V to 5.5V, making it compatible with a variety of digital logic systems.
The device features two independent D-type flip-flops, each with a positive edge-triggered clock input, data input, preset input, and clear input. It also includes both normal and inverted output signals for each flip-flop. This versatility makes the SN74ACT74DRE4 suitable for a wide range of applications in digital circuit design.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 4.5 | 5.5 | V | |
| VI (Input Voltage) | -0.5 | VCC + 0.5 | V | |
| IOH (Output Current High) | -24 mA | -50 mA | mA | |
| IOL (Output Current Low) | 24 mA | 50 mA | mA | |
| fclock (Clock Frequency) | 85 | 125 | 145 | MHz |
| tpd (Propagation Delay) | 10.5 ns | ns | ||
| Tstg (Storage Temperature) | -65 | 150 | °C |
Key Features
- Operates within a supply voltage range of 4.5V to 5.5V.
- Inputs accept voltages up to 5.5V.
- Maximum propagation delay of 10.5 ns at 5V.
- Inputs are TTL-voltage compatible.
- Dual positive-edge-triggered D-type flip-flops.
- Each flip-flop has clear, preset, clock, and data inputs, along with normal and inverted output signals.
- Available in various packages including SOIC, SSOP, PDIP, and TSSOP.
Applications
- Digital logic circuits and systems.
- Sequential logic designs.
- Counters and shift registers.
- Memory circuits and data storage systems.
- Timing and clocking circuits.
- General-purpose digital signal processing.
Q & A
- What is the operating voltage range of the SN74ACT74DRE4?
The SN74ACT74DRE4 operates within a supply voltage range of 4.5V to 5.5V.
- What is the maximum propagation delay of the SN74ACT74DRE4 at 5V?
The maximum propagation delay is 10.5 ns at 5V.
- Are the inputs of the SN74ACT74DRE4 TTL-voltage compatible?
- What types of packages are available for the SN74ACT74DRE4?
The device is available in SOIC, SSOP, PDIP, and TSSOP packages.
- What is the clock frequency range of the SN74ACT74DRE4?
The clock frequency range is up to 145 MHz.
- How should unused inputs be handled in the SN74ACT74DRE4?
Unused inputs should be connected to a high or low bias to prevent them from floating.
- What is the storage temperature range for the SN74ACT74DRE4?
The storage temperature range is -65°C to 150°C.
- Can the SN74ACT74DRE4 be used in safety-critical applications?
It is advisable to refer to the specific safety-critical application guidelines and disclaimers provided in the datasheet.
- What is the continuous output current rating for the SN74ACT74DRE4?
The continuous output current rating is ±50 mA.
- How should the layout be designed for the SN74ACT74DRE4 to minimize noise and improve signal isolation?
Recommendations include using GND flood fill, avoiding 90° corners for signal lines, and placing bypass capacitors close to the device.
