74HC74 Dual D-type Flip Flop with Set and Reset – 7474

74HC74 Dual D Flip-Flop with Set and Reset SOIC-14 The 74HC74 is a dual positive-edge-triggered D-type flip-flop featuring independent data, clock, set, and reset inputs for each channel. Built using high-speed CMOS technology, it offers low power consumption, high noise immunity, and reliable operation across a wide voltage range. Each flip-flop captures input data on the rising edge of the clock signal, while asynchronous set and reset inputs allow immediate control of outputs regardless of clock state. The device is widely used in registers, counters, frequency dividers, and digital storage applications. It comes in a compact SOIC-14 package suitable for surface-mount designs. Features Dual D-type flip-flops with independent control inputs. Positive-edge-triggered operation. Asynchronous set and reset inputs. Wide operating voltage range (2V to 6V). High noise immunity and low power consumption. TTL-compatible input levels. Compact SOIC-14 package. PINOUT Specifications Absolute Maximum Ratings Symbol Parameter Value Unit V CC DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V V in DC Input Voltage (Referenced to GND) -1.5 to V CC + 0.5 V V out DC Output Voltage (Referenced to GND) -0.5 to V CC + 0.5 V I in DC Input Current, per Pin ±20 mA I out DC Output Current, per Pin ±25 mA I CC DC Supply Current, V CC and GND Pins ±50 mA P D Power Dissipation in Still Air 500 mW T stg Storage Temperature -65 to +150 °C T L Lead Temperature (10s) 260 °C Applications Registers and data storage elements. Frequency dividers and counters. Digital timing and synchronization circuits. Shift registers and memory elements. General-purpose CMOS logic systems. Documents Datasheet 74HC74 CAD Files Download

74HC74-7474 (Dual D-type flip-flop with set and reset-positive edge-trigger) is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. 74LS74A flip-flop IC utilizes the Schottky TTL circuitry to produce high-speed D-type flip-flops. Each flip-flop has individual clear and set inputs, and also complementary Q and Q`(bar) outputs. 74LS74 Pinout Configuration Pin Number Pin Symbol Name Description 5,9 1Q / 2Q Output Output Pin of the Flip Flop 6,8 1Q’(bar) / 2Q’(bar) Complementary Output The inverted output pin of Flip Flop 3, 11 1CLK / 2CLK Clock Input Pin These pins must be provided with a clock pulse for the flip-flop 1,13 1CLR (bar) / 2CLR (bar) Clear Data Resets the flip-flop by clearing its memory 2,12 1D /2D Data Input Pin Input pin of the Flip Flop 4, 10 1PRE (bar) / 2PRE (bar) PRE Input Another Input pin for Flip Flop. Also referred to as a set pin 7 Vss Ground Connected to the ground of the system 14 Vdd/Vcc Supply Voltage Powers the IC typically with 5V Features Dual D Flip Flop Package IC Operating Voltage: 2V to 15V Propagation Delay: 40nS Minimum High-Level Input Voltage: 2 V Maximum Low-Level Input Voltage: 0.8V Operating Temperature: 0 to 70°C High-Level Output Current: 8mA Available in 14-pin SO-14, SOT42 packages Note: Complete Technical Details can be found in the 74LS74 datasheet given at the end of this page. How to use 74LS74 Using a Flip-Flop is pretty straightforward. Simply power the IC using the Vcc and GND pin. As told earlier each flip-flop operates independently, just connect the input signals 2 and 3 for using the 1st flip-flop and you will get the output at pins 5 and 6. Pin 3 should be provided with a clock source normally a PWM signal from an MCU or 555 timers is used. The pin can be used to clear the data and reset the flip-flop by making it high. The complete working of the Flip flop can be understood by looking at the function table below. The symbol “X” indicates don’t care and the up-arrow indicates the rising edge of the signal. INPUTS OUTPUTS PRE (bar) CLR (bar) CLK D Q Q (bar) L H X X H L H L X X L H L L X X H H H H H H L H H L L H H H L X Q 0 Q 0 (bar) You can also simulate the IC to check if it would work as desired. Here I have used logic state and logic bits to view if the IC functions as it is supposed to, but you can replace them with the actual circuitry of your application to check if it would suit your needs. The gif file shown below can be verified with the truth table above to make sure that the IC works as desired. Applications Used as Shift Registers Memory/Control Registers Buffer Circuits Sampling Circuits Latching devices Component Datasheet 74LS74 Datasheet It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.

74HC74 Dual D-type Flip Flop with Set and Reset – 7474 Specifications TYPE DESCRIPTION Category Integrated Circuits (ICs) Mfr Texas Instruments Series 74HC Package Tube Part Status Active Function Set(Preset) and Reset Type D-Type Output Type Complimentary Number of Elements 2 Number of Bits per Element 1 Clock Frequency 60 MHz Max Propagation Delay @ V, Max CL 30ns @ 6V, 50pF Trigger Type Positive Edge Current – Output High, Low 5.2mA, 5.2mA Voltage – Supply 2V ~ 6V Current – Quiescent (Iq) 4 ?A Input Capacitance 3 pF Operating Temperature -40?C ~ 85?C (TA) Mounting Type Through Hole Supplier Device Package 14-PDIP Package / Case 14-DIP (0.300″, 7.62mm) Base Product Number 74HC74 Datasheet: 74HC74 Related Products: 74xx ICs