Overview
The 74AC74MTC, produced by Fairchild Semiconductor, is a dual D-type positive edge-triggered flip-flop. This component features asynchronous Clear and Set inputs along with complementary (Q, Q) outputs. The flip-flop transfers information from the input to the outputs on the positive edge of the clock pulse, ensuring that the data input is locked out once the clock pulse input threshold voltage is passed. This device is available in various package types, including SOIC, SOP, and TSSOP, making it versatile for different design requirements.
Key Specifications
| Parameter | Condition | Typical | Guaranteed Limits |
|---|---|---|---|
| Supply Voltage (VCC) | -0.5V to +7.0V | - | - |
| Maximum Clock Frequency | VCC = 3.3V, CL = 50pF | 100 MHz | 95 MHz |
| Maximum Clock Frequency | VCC = 5.0V, CL = 50pF | 140 MHz | 125 MHz |
| Propagation Delay (CP to Q) | VCC = 3.3V, CL = 50pF | 4.5 ns | 8.0 ns |
| Propagation Delay (CP to Q) | VCC = 5.0V, CL = 50pF | 3.5 ns | 6.0 ns |
| Set-up Time (D to CP) | VCC = 3.3V | 1.5 ns | 4.0 ns |
| Hold Time (D to CP) | VCC = 3.3V | -2.0 ns | 0.5 ns |
| Output Current (IOL) | VCC = 5.5V, VOUT = 1.65V | 75 mA | - |
| Output Current (IOH) | VCC = 5.5V, VOUT = 3.85V | -75 mA | - |
| Quiescent Supply Current (ICC) | VCC = 5.5V, VIN = VCC or GND | 2.0 µA | 20.0 µA |
Key Features
- Dual D-type positive edge-triggered flip-flop with asynchronous Clear and Set inputs.
- Complementary (Q, Q) outputs.
- Reduced ICC by 50% compared to previous versions.
- Output source/sink capability of 24 mA.
- ACT74 version has TTL-compatible inputs.
- Available in various package types: SOIC, SOP, and TSSOP.
Applications
The 74AC74MTC is suitable for a wide range of digital circuit applications, including:
- Sequential logic circuits.
- Counters and shift registers.
- Data storage and retrieval systems.
- Timing and control circuits in digital systems.
- General-purpose digital logic designs.
Q & A
- What is the primary function of the 74AC74MTC?
The 74AC74MTC is a dual D-type positive edge-triggered flip-flop, which transfers data from the input to the output on the positive edge of the clock pulse.
- What are the asynchronous inputs on the 74AC74MTC?
The asynchronous inputs are the Clear (CD) and Set (SD) inputs, which can set the output Q to LOW or HIGH, respectively, independent of the clock.
- What are the different package types available for the 74AC74MTC?
The device is available in SOIC, SOP, and TSSOP package types.
- What is the maximum clock frequency for the 74AC74MTC at VCC = 5.0V?
The maximum clock frequency at VCC = 5.0V is 140 MHz.
- What is the output current capability of the 74AC74MTC?
The output can source or sink up to 24 mA.
- Does the ACT74 version have TTL-compatible inputs?
- What is the quiescent supply current (ICC) for the 74AC74MTC at VCC = 5.5V?
The quiescent supply current (ICC) is typically 2.0 µA and guaranteed to be less than or equal to 20.0 µA.
- What is the set-up time for the data input relative to the clock pulse?
The set-up time for the data input relative to the clock pulse is typically 1.5 ns at VCC = 3.3V.
- What is the hold time for the data input relative to the clock pulse?
The hold time for the data input relative to the clock pulse is typically -2.0 ns at VCC = 3.3V.
- What are some common applications of the 74AC74MTC?
