7473
#7473
#J-K flip-flop
#dual flip-flop
#CMOS
#digital logic
#sequential logic
#frequency division
#data storage
#clear input
7473 Dual J-K Flip-Flop with Clear Technical Summary
Overview
The 7473 is a dual J-K flip-flop integrated circuit featuring individual J, K, clock, and asynchronous clear inputs for each flip-flop. This device is part of the high-speed CMOS (HC) family, offering low power consumption while maintaining high noise immunity. Each flip-flop has complementary outputs (Q and Q̅) that can be toggled, set, or cleared based on input conditions. The 7473 is widely used in digital systems for data storage, frequency division, and sequential logic applications.
Features
- Dual J-K flip-flop in single package
- Asynchronous clear (CLR) inputs for each flip-flop
- Complementary outputs (Q and Q̅) for each flip-flop
- High-speed operation with typical propagation delay of 13ns at VCC = 5V
- Wide operating voltage range: 2V to 6V
- Low power consumption: 20µA maximum ICC at room temperature
- High noise immunity: 0.45 VCC (typical)
- Available in multiple package options including PDIP, SOIC, and TSSOP
Applications
- Data storage and transfer in digital systems
- Frequency division circuits
- Counters and registers
- State machine implementation
- General purpose flip-flop applications
- Pulse synchronization
- Debouncing circuits
Pin Description
| Pin No | Symbol | Name and Function |
|---|---|---|
| 1, 5 | 1CK, 2CK | Clock Input for Flip-Flop 1 and 2 |
| 2, 6 | 1CLR, 2CLR | Asynchronous Reset Inputs (Active LOW) |
| 12, 9 | 1Q, 2Q | True Flip-Flop Outputs |
| 13, 8 | 1Q̅, 2Q̅ | Complement Flip-Flop Outputs |
| 14, 7, 3, 10 | 1J, 2J, 1K, 2K | Synchronous Inputs for Flip-Flop 1 and 2 |
| 11 | GND | Ground (0V) |
| 4 | VCC | Positive Supply Voltage |
Truth Table
| CLR | J | K | CK | Q | Q̅ | Function |
|---|---|---|---|---|---|---|
| L | X | X | X | L | H | CLEAR |
| H | L | L | ↑ | Qn | Q̅n | NO CHANGE |
| H | L | H | ↑ | L | H | RESET |
| H | H | L | ↑ | H | L | SET |
| H | H | H | ↑ | Q̅n | Qn | TOGGLE |
| H | X | X | L | Qn | Q̅n | NO CHANGE |
Note: X = Don't Care, ↑ = Rising Edge, Qn/Q̅n = Previous State
Electrical Characteristics
Absolute Maximum Ratings
- Supply Voltage (VCC): -0.5V to +7V
- Input Voltage (VI): -0.5V to VCC + 0.5V
- Output Voltage (VO): -0.5V to VCC + 0.5V
- Operating Temperature Range:
- M54HC Series: -55°C to +125°C
- M74HC Series: -40°C to +85°C
- Storage Temperature Range: -65°C to +150°C
Recommended Operating Conditions
| Symbol | Parameter | Value | Unit |
|---|---|---|---|
| VCC | Supply Voltage | 2 to 6 | V |
| VI | Input Voltage | 0 to VCC | V |
| VO | Output Voltage | 0 to VCC | V |
| TA | Operating Temperature | -40 to +85 (M74HC) -55 to +125 (M54HC) |
°C |
