Onsemi MC14013BDG Dual D-Type Flip-Flop: Datasheet, Pinout, and Application Circuit Guide
The MC14013BDG from Onsemi is a highly reliable, dual independent D-type flip-flop integrated circuit fabricated with CMOS technology. Housed in a SOIC-14 package, this device is characterized by its wide operating voltage range (3.0 V to 18 V), low power consumption, and high noise immunity. It is a versatile component widely used in digital logic systems for data storage, registration, and transfer, making it a fundamental building block for counters, shift registers, and memory units.
Datasheet Overview and Key Specifications
Understanding the datasheet is crucial for effective implementation. Below are the absolute maximum ratings and key electrical characteristics:
Supply Voltage Range (VDD): -0.5 V to +18 V
Input Voltage Range (VIN): -0.5 V to VDD + 0.5 V
Operating Temperature Range: -55°C to +125°C
Static Current (ICC): Very low (typically 100 nA at 5 V, 25°C), making it ideal for battery-powered applications.
Propagation Delay (tPHL/tPLH): Typically 200 ns at 5 V, defining the speed of data transfer.
Noise Immunity: A key feature of CMOS, typically 45% of VDD, ensuring stable operation in electrically noisy environments.
Pinout Configuration
The MC14013BDG consists two identical, independent flip-flops. Each has Set (S) and Reset (R) inputs, which are active HIGH and override the clock and data inputs.
Pin 1 (Q1): Output of the first flip-flop.
Pin 2 (Q1̅): Complementary output of the first flip-flop.
Pin 3 (CP1): Clock input for the first flip-flop.
Pin 4 (R1): Reset input (Active HIGH) for the first flip-flop.
Pin 5 (D1): Data input for the first flip-flop.
Pin 6 (S1): Set input (Active HIGH) for the first flip-flop.
Pin 7 (VSS): Ground (0 V).
Pin 8 (S2): Set input (Active HIGH) for the second flip-flop.
Pin 9 (D2): Data input for the second flip-flop.
Pin 10 (R2): Reset input (Active HIGH) for the second flip-flop.
Pin 11 (CP2): Clock input for the second flip-flop.
Pin 12 (Q2̅): Complementary output of the second flip-flop.
Pin 13 (Q2): Output of the second flip-flop.
Pin 14 (VDD): Positive supply voltage.
Application Circuit Guide: A Basic Data Latch
One of the most common uses of a D-type flip-flop is as a data latch to store the state of a data line at a specific moment.
Circuit Operation:
1. Components: One half of the MC14013BDG, a push button (for clock), a switch (for data input), two pull-down resistors (e.g., 10kΩ) for the clock and data lines, and LEDs with current-limiting resistors on the Q and Q̅ outputs to visualize the state.
2. Setup: Connect VDD to your positive supply (e.g., 5V or 9V) and VSS to ground. The unused flip-flop's inputs should be tied to ground (VSS).
3. Functionality: The state of the D input is transferred to the Q output only on the LOW-to-HIGH (positive) transition of the clock pulse. This is known as positive-edge triggering.
4. Process:
Set the D input switch to either HIGH (VDD) or LOW (VSS).
Momentarily press and release the clock button. This action creates a positive-edge trigger.
The LED on the Q output will immediately light up if D was HIGH, or turn off if D was LOW at the moment the clock button was pressed. The Q̅ output will show the opposite state.
The output will now remain latched in this state, regardless of any subsequent changes to the D input, until the next positive clock edge is received or a HIGH signal is applied to the Set or Reset pin.
This simple latch circuit demonstrates the core function of the device: stable data storage and synchronization. More complex applications involve cascading multiple flip-flops to create binary ripple counters or serial-to-parallel data converters.
The Onsemi MC14013BDG is a robust and versatile dual D-type flip-flop IC. Its wide voltage operation, exceptional noise immunity, and low power consumption make it a superior choice for a vast array of digital design projects, from simple logic state retention to complex sequential circuits. Whether you are a student or a professional engineer, this IC is an essential component for any digital toolkit.
Keywords:
D-Type Flip-Flop
CMOS Logic
Data Latch
SOIC-14
Positive-Edge Triggering
