Overview
The SN74ACT74DR 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. It operates within a voltage range of 4.5V to 5.5V, making it compatible with TTL (Transistor-Transistor Logic) voltage levels. The SN74ACT74DR is available in a 14-pin SOIC (Small Outline Integrated Circuit) package, making it suitable for a variety of digital logic applications.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| VCC (Supply Voltage) | V | 4.5 | 5.5 | |
| VIH (High-level Input Voltage) | V | 2 | ||
| VIL (Low-level Input Voltage) | V | 0.8 | ||
| IOH (High-level Output Current) | mA | -24 | ||
| IOL (Low-level Output Current) | mA | 24 | ||
| TA (Operating Free-Air Temperature) | °C | -40 | 85 | |
| fclock (Clock Frequency) | MHz | 85 | 145 | |
| tPLH (Propagation Delay Time, PRE or CLR to Q or Q) | ns | 1 | 11.5 | |
| tPHL (Propagation Delay Time, PRE or CLR to Q or Q) | ns | 1 | 12.5 |
Key Features
- Operates from 4.5V to 5.5V supply voltage
- Inputs accept voltages up to 5.5V
- Maximum propagation delay time of 10.5 ns at 5V
- TTL-voltage compatible inputs
- Dual positive-edge-triggered D-type flip-flops
- Available in various packages including SOIC, SSOP, PDIP, and TSSOP
- High clock frequency up to 145 MHz
Applications
The SN74ACT74DR is widely used in various digital logic applications, including:
- Sequential logic circuits
- Counters and shift registers
- Memory circuits
- Timing and control circuits
- General-purpose digital logic designs
Q & A
- What is the operating voltage range of the SN74ACT74DR?
The SN74ACT74DR operates from 4.5V to 5.5V.
- What is the maximum clock frequency of the SN74ACT74DR?
The maximum clock frequency is up to 145 MHz.
- What are the package options available for the SN74ACT74DR?
The device is available in SOIC, SSOP, PDIP, and TSSOP packages.
- What is the propagation delay time of the SN74ACT74DR?
The maximum propagation delay time is 10.5 ns at 5V.
- Are the inputs of the SN74ACT74DR TTL-voltage compatible?
- What is the recommended operating temperature range for the SN74ACT74DR?
The recommended operating temperature range is from -40°C to 85°C.
- How should unused inputs be handled in the SN74ACT74DR?
Unused inputs should be tied to either GND or VCC to prevent floating and ensure stable operation.
- What is the high-level output current capability of the SN74ACT74DR?
The high-level output current capability is up to -24 mA.
- What is the low-level output current capability of the SN74ACT74DR?
The low-level output current capability is up to 24 mA.
- Is the SN74ACT74DR suitable for high-speed applications?
