The 74LS73 is a dual J-K Flip-flop with clear with LS technology and two independent J-K flip-flops with individual J-K, clock, and direct clear inputs. This article mainly explains datasheet, pinout, application, working, and other details about 74LS73 flip-flop.
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Nov 1, 2021
Ula Romeo
JK Flip-flop Circuit & Working Explained
The 74LS73 is a dual J-K Flip-flop with clear with LS technology and two independent J-K flip-flops with individual J-K, clock, and direct clear inputs. This article mainly explains datasheet, pinout, application, working, and other details about 74LS73 flip-flop.
74LS73N
The 74LS73 is a twin J-K flip-flop with clear and LS technology, as well as two independent J-K flip-flops having J-K, clock, and direct clear inputs. Two negative-edge-triggered flip-flops are included in the LS73A. For predictable functioning, the J and K inputs must be steady one setup time before the high-to-low clock change. When the clear is low, the clock and data inputs are overridden, causing the Q output to be low and the Q output to be high.
74LS73 Pin
| Pin No | Pin Name | Description |
| 1 | CLK1 | Clock input pin 1 |
| 2 | CLR1― | Active low clear pin 1 |
| 3 | K1 | Input pin K1 |
| 4 | VCC | Supply Voltage |
| 5 | CLK2 | Clock input pin 2 |
| 6 | CLR2― | Active low clear pin 2 |
| 7 | J2 | Input pin J2 |
| 8 | Q2― | Active low output 2 pin |
| 9 | Q2 | Active high output 2 pin |
| 10 | K2 | Input pin K2 |
| 11 | GND | Ground Pin |
| 12 | Q1 | Active high output 1 pin |
| 13 | Q1― | Active low output 1 pin |
| 14 | J1 | Input pin J1 |
74LS73 Connection Diagram
RAYTHEON SEMICONDUCTOR 74LS73N technical specifications, attributes, parameters and parts with similar specifications to RAYTHEON SEMICONDUCTOR 74LS73N.
| Product Attribute | Attribute Value | |
|---|---|---|
| Surface Mount | NO | |
| Number of Terminals | 14Terminals | |
| Operating Temperature (Max.) | 70°C | |
| JESD-609 Code | e0 | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Position | DUAL |
| Product Attribute | Attribute Value | |
|---|---|---|
| Terminal Form | THROUGH-HOLE | |
| Number of Functions | 2Functions | |
| Supply Voltage | 5V | |
| Terminal Pitch | 2.54mm | |
| JESD-30 Code | R-PDIP-T14 | |
| Qualification Status | Not Qualified |
| Product Attribute | Attribute Value | |
|---|---|---|
| Power Supplies | 5V | |
| Temperature Grade | COMMERCIAL | |
| Logic IC Type | J-K FLIP-FLOP | |
| Trigger Type | NEGATIVE EDGE | |
| RoHS Status | Non-RoHS Compliant |
Dual JK Flip Flop Package IC
Operating Voltage: 5V
High-Level Input Voltage: 2 V
Low-Level Input Voltage: 0.8 V
Operating temperature range = -55 to 125°C
Available in 14-pin PDIP, GDIP, PDSO packages
Shift Registers
PCs and notebooks
Digital Electronics
Network equipment
Memory/Control Registers
EEPROM circuits
Latching devices
The 74LS73 is a JK flip flop IC with two in-line lines. It contains two JK flip flops, each of which can be used independently depending on our purpose. When the clock is high, the J-K input is loaded into the master, and when the clock is low, it is transferred to the slave. For your project, this IC can be used in latching applications or as a small programmable memory.
Here shows a typical sample connection for the working of 74LS73 JK Flip-Flops.
74LS73 Circuit
The J and K pins are the Flip-input Flop's pins, while the Q and Q bar pins are its output pins. Through the use of a 1k resistor, input pins are brought down to the ground, preventing the pin from floating. When the button is not pressed, the pin is held to the ground, and when the button is pressed, the pin is held to supply voltage.
The reset button should be pulled up with a 1K resistor, and when grounded, the flip-flop will be reset. The JK flip-clock flop's signal is responsible for changing the output's state. Only the rising edge of the clock signal will cause the flip-flop to change its output.
MC74HC73A, 74LS76, 74LS107, 4027B
74LS73 Package Dimensions
Raytheon's Semiconductor Division was established in Mountain View, California, in 1968 by its parent company, Raytheon Company of Lexington, Massachusetts, which is 1990, was described as"one of the largest and most diversified electronics companies in the United States." In the early 1990s, the company was involved in the manufacture and distribution of semiconductors and had 1200 employees at its Mountain View location. In November of 1997, Raytheon sold its Semi-Conductors/Integrated Circuits Division to the Fairchild Semiconductor Corporation.
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