Overview
The SN74HC74DR is a dual D-type positive-edge-triggered flip-flop integrated circuit produced by Texas Instruments. This device contains two independent flip-flops, each with asynchronous preset and clear pins. It is designed to operate within a wide voltage range and is suitable for various digital logic applications. The SN74HC74DR is packaged in a 14-pin SOIC (D) package, making it convenient for surface mount applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 14-pin SOIC (D) |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage Range | 2 V to 6 V |
| Maximum Clock Frequency | Up to 60 MHz |
| Propagation Delay | 15 ns @ 6 V, 50 pF |
| Input Capacitance | 3 pF |
| Output Drive Capability | Up to 10 LSTTL loads |
| Quiescent Current | 40 µA max |
| Output Type | Differential |
| Trigger Type | Positive Edge |
Key Features
- Buffered inputs
- Wide operating voltage range: 2 V to 6 V
- Wide operating temperature range: -40°C to +85°C
- Supports fanout up to 10 LSTTL loads
- Significant power reduction compared to LSTTL logic ICs
- Positive-edge-triggered flip-flops with asynchronous preset and clear pins for each flip-flop
- Low power consumption and low input current
- Balanced CMOS push-pull outputs
Applications
- Convert a momentary switch to a toggle switch
- Divide a clock signal by 2 or 4
- General-purpose digital logic circuits
- Timing and sequencing circuits
- Data storage and transfer applications
Q & A
- What is the package type of the SN74HC74DR? The SN74HC74DR is packaged in a 14-pin SOIC (D) package.
- What is the operating temperature range of the SN74HC74DR? The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the SN74HC74DR? The supply voltage range is 2 V to 6 V.
- What is the maximum clock frequency of the SN74HC74DR? The maximum clock frequency is up to 60 MHz.
- How many LSTTL loads can the SN74HC74DR drive? The SN74HC74DR can drive up to 10 LSTTL loads.
- What is the quiescent current of the SN74HC74DR? The quiescent current is 40 µA max.
- Does the SN74HC74DR have asynchronous preset and clear pins? Yes, each flip-flop has asynchronous preset and clear pins.
- What is the propagation delay of the SN74HC74DR? The propagation delay is 15 ns @ 6 V, 50 pF.
- Is the SN74HC74DR lead-free and ROHS compliant? Yes, the SN74HC74DR is lead-free and ROHS compliant.
- What are some common applications of the SN74HC74DR? Common applications include converting a momentary switch to a toggle switch, dividing a clock signal, and general-purpose digital logic circuits.
