Overview
The 74HCT273D, produced by NXP USA Inc. (now part of Nexperia), is an octal positive-edge triggered D-type flip-flop. This device is part of the 74HCT family, which is known for its compatibility with TTL (Transistor-Transistor Logic) input levels. The 74HCT273D features clock (CP) and master reset (MR) inputs, making it versatile for various digital circuit applications.
The device operates within a wide supply voltage range of 4.5 V to 5.5 V, ensuring compatibility with a variety of power sources. It is packaged in a SO20 (Small Outline 20 leads) package, which is compact and suitable for modern PCB designs.
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74HCT273D | 4.5 - 5.5 | TTL | ± 4 | 15 | 36 | Low | -40 ~ 125 | 85 | 27.5 | 61 | SO20 |
Key Features
- Octal D-type Flip-Flop: The device contains eight positive-edge triggered D-type flip-flops.
- Clock and Master Reset Inputs: Features clock (CP) and master reset (MR) inputs for flexible control.
- TTL Input Levels: Compatible with TTL input levels, making it suitable for a wide range of digital circuits.
- Wide Supply Voltage Range: Operates from 4.5 V to 5.5 V, ensuring robust performance across different power sources.
- Low Power Dissipation: CMOS technology ensures low power consumption.
- High Noise Immunity: Provides high noise immunity, enhancing the reliability of the circuit.
- ESD Protection: Offers ESD protection with HBM (Human Body Model) exceeding 2000 V and CDM (Charged Device Model) exceeding 1000 V.
- Multiple Package Options: Available in SO20 package, which is compact and suitable for modern PCB designs.
Applications
- Digital Circuits: Ideal for use in various digital circuits requiring flip-flop functionality, such as counters, registers, and memory elements.
- Embedded Systems: Suitable for embedded systems that require low power consumption and high reliability.
- Industrial Automation: Used in industrial automation systems where robust and reliable digital logic is essential.
- Consumer Electronics: Found in consumer electronics such as calculators, digital watches, and other electronic devices requiring digital logic.
Q & A
- What is the 74HCT273D?
The 74HCT273D is an octal positive-edge triggered D-type flip-flop with clock and master reset inputs.
- What is the supply voltage range for the 74HCT273D?
The device operates within a supply voltage range of 4.5 V to 5.5 V.
- What are the logic switching levels for the 74HCT273D?
The 74HCT273D is compatible with TTL (Transistor-Transistor Logic) input levels.
- What is the maximum clock frequency for the 74HCT273D?
The maximum clock frequency is 36 MHz.
- What is the package type for the 74HCT273D?
The device is packaged in a SO20 (Small Outline 20 leads) package.
- Does the 74HCT273D have ESD protection?
Yes, it offers ESD protection with HBM exceeding 2000 V and CDM exceeding 1000 V.
- What are the operating temperature ranges for the 74HCT273D?
The device operates from -40 °C to +125 °C.
- Is the 74HCT273D RoHS compliant?
Yes, the 74HCT273D is RoHS compliant.
- What are some common applications for the 74HCT273D?
Common applications include digital circuits, embedded systems, industrial automation, and consumer electronics.
- How does the master reset input work on the 74HCT273D?
A LOW on the master reset (MR) input forces the outputs LOW independently of the clock and data inputs.
