Overview
The 74HC73D is a dual negative-edge triggered JK flip-flop integrated circuit produced by Nexperia (formerly NXP USA Inc.). This component features individual J, K, clock (nCP), and reset (nR) inputs along with complementary nQ and nQ outputs. The flip-flop is designed to operate with low power dissipation and is part of the 74HC series, known for its high-speed CMOS logic.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | fmax (MHz) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74HC73D | 2.0 - 6.0 | CMOS | ± 5.2 | 16 | 77 | Low | -40 ~ 125 | 74 | 1 | 31 | SO14 |
Key Features
- Low-power dissipation
- Complies with JEDEC standard no. 7A
- ESD protection:
- HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- MM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
- Schmitt-trigger action in the clock input for tolerance to slower clock rise and fall times
- Inputs include clamp diodes for interfacing with voltages in excess of VCC
- Specified from -40 °C to +80 °C and from -40 °C to +125 °C
- Multiple package options available (SO14, SSOP14, TSSOP14)
Applications
The 74HC73D is suitable for a variety of digital circuit applications requiring flip-flop functionality, such as:
- Sequential logic circuits
- Counters and timers
- Memory elements in digital systems
- Control circuits in electronic devices
Q & A
- What is the 74HC73D?
The 74HC73D is a dual negative-edge triggered JK flip-flop integrated circuit.
- What are the key inputs and outputs of the 74HC73D?
The key inputs include J, K, clock (nCP), and reset (nR), with complementary nQ and nQ outputs.
- What is the operating voltage range of the 74HC73D?
The operating voltage range is from 2.0 V to 6.0 V.
- What is the maximum clock frequency of the 74HC73D?
The maximum clock frequency is 77 MHz.
- Does the 74HC73D have ESD protection?
- What are the temperature specifications for the 74HC73D?
- What package options are available for the 74HC73D?
- How does the reset input function on the 74HC73D?
The reset input (nR) is asynchronous and overrides the clock and data inputs when LOW, forcing the nQ output LOW and the nQ output HIGH.
- What is the significance of Schmitt-trigger action in the clock input?
The Schmitt-trigger action makes the circuit highly tolerant to slower clock rise and fall times.
- Can the 74HC73D be used with voltages in excess of VCC?
