Overview
The MC74HC74ADR2, produced by onsemi, is a Dual D Flip-Flop with Set and Reset. This device is part of the high-performance silicon-gate CMOS logic family and is identical in pinout to the LS74. It is designed to be compatible with standard CMOS outputs and, with the use of pullup resistors, can also interface with LSTTL outputs. The MC74HC74ADR2 consists of two D flip-flops, each with individual Set, Reset, and Clock inputs. Information at the D-input is transferred to the corresponding Q output on the next positive-going edge of the clock input. Both Q and Q' outputs are available from each flip-flop, and the Set and Reset inputs are asynchronous.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| DC Supply Voltage (VCC) | 2.0 to 6.0 | V | |
| DC Input Voltage (Vin) | –0.5 to VCC + 0.5 | V | |
| DC Output Voltage (Vout) | –0.5 to VCC + 0.5 | V | |
| Maximum Clock Frequency | 4.8 to 28 MHz | MHz | VCC = 2.0 to 6.0 V |
| Maximum Propagation Delay, Clock to Q or Q' | 17 to 150 ns | ns | VCC = 2.0 to 6.0 V |
| Minimum Setup Time, Data to Clock | 14 to 120 ns | ns | VCC = 2.0 to 6.0 V |
| Minimum Hold Time, Clock to Data | 3.0 ns | ns | VCC = 2.0 to 6.0 V |
| Maximum Input Leakage Current | ±1.0 μA | μA | Vin = VCC or GND |
| Operating Free-Air Temperature | –55 to +125 °C | °C |
Key Features
- Output Drive Capability: 10 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2.0 to 6.0 V
- Low Input Current: 1.0 μA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the JEDEC Standard No. 7.0 A Requirements
- Chip Complexity: 136 FETs or 34 Equivalent Gates
- Pb-Free, Halogen Free/BFR Free and RoHS Compliant
- AEC-Q100 Qualified and PPAP Capable for automotive and other applications requiring unique site and control change requirements
Applications
The MC74HC74ADR2 is versatile and can be used in a variety of digital logic circuits. It is particularly useful in applications requiring data storage and transfer, such as:
- Sequential logic circuits
- Counters and timers
- Shift registers
- Automotive systems requiring AEC-Q100 qualification
- General-purpose digital logic circuits where high noise immunity and low power consumption are necessary
Q & A
- What is the operating voltage range of the MC74HC74ADR2?
The operating voltage range is from 2.0 to 6.0 V.
- What types of outputs does the MC74HC74ADR2 have?
The device has both Q and Q' outputs available from each flip-flop.
- Are the Set and Reset inputs synchronous or asynchronous?
The Set and Reset inputs are asynchronous.
- What is the maximum clock frequency for the MC74HC74ADR2?
The maximum clock frequency ranges from 4.8 to 28 MHz depending on the VCC voltage.
- Is the MC74HC74ADR2 RoHS compliant?
- What is the minimum setup time for the data to clock input?
The minimum setup time ranges from 14 to 120 ns depending on the VCC voltage).
- Can the MC74HC74ADR2 be used in automotive applications?
- What is the maximum input leakage current?
- What is the operating temperature range for the MC74HC74ADR2?
- How many LSTTL loads can the outputs drive?
