Overview
The 74HC02DTR2G is a quad 2-input NOR gate integrated circuit produced by onsemi. Although this specific model is now obsolete and no longer manufactured, it was widely used for its high-speed CMOS logic capabilities. The device was fabricated with silicon gate CMOS technology, offering high-speed operation similar to Bipolar Schottky TTL while maintaining low power dissipation characteristic of CMOS devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC (DC Supply Voltage) | 2.0 to 6.0 | V |
| VIN (DC Input Voltage) | −0.5 to +6.5 | V |
| VOUT (DC Output Voltage) | −0.5 to VCC + 0.5 | V |
| IIN (DC Input Current, per Pin) | ±20 | mA |
| IOUT (DC Output Current, Per Pin) | ±25 | mA |
| ICC (DC Supply Current, VCC and GND Pins) | ±50 | mA |
| tPLH, tPHL (Propagation Delay) | 3.6 ns (typ.) at VCC = 5 V, CL = 15 pF | ns |
| TSTG (Storage Temperature Range) | −65 to +150 | °C |
| TJ (Junction Temperature Under Bias) | +150 | °C |
Key Features
- High-Speed Operation: The 74HC02DTR2G achieves high-speed operation with a propagation delay of 3.6 ns (typ.) at VCC = 5 V and CL = 15 pF.
- Low Power Dissipation: It features low power dissipation, with a maximum DC supply current of 2 μA at TA = 25°C.
- Input Protection: The device includes an input protection circuit that allows input voltages from 0 V to 5.5 V without regard to the supply voltage, preventing device destruction due to mismatched supply and input voltages.
- Compatibility: It can be used to interface 5 V to 3 V systems and two supply systems such as battery backup.
- Noise Immunity: The internal circuit includes buffer output stages that provide high noise immunity and stable output.
Applications
The 74HC02DTR2G is suitable for a variety of applications requiring high-speed logic operations with low power consumption. These include:
- Interface circuits between 5 V and 3 V systems.
- Battery backup systems.
- High-speed digital logic circuits.
- General-purpose logic applications where low power and high speed are critical.
Q & A
- What is the 74HC02DTR2G?
The 74HC02DTR2G is a quad 2-input NOR gate integrated circuit produced by onsemi.
- Why is the 74HC02DTR2G obsolete?
The 74HC02DTR2G is no longer manufactured and has been replaced by other models or substitutes.
- What is the typical propagation delay of the 74HC02DTR2G?
The typical propagation delay is 3.6 ns at VCC = 5 V and CL = 15 pF.
- What is the maximum DC supply current of the 74HC02DTR2G?
The maximum DC supply current is 2 μA at TA = 25°C.
- Can the 74HC02DTR2G be used in battery backup systems?
Yes, it can be used in battery backup systems and other two-supply systems.
- What is the input protection feature of the 74HC02DTR2G?
The device includes an input protection circuit that allows input voltages from 0 V to 5.5 V without regard to the supply voltage.
- What is the storage temperature range of the 74HC02DTR2G?
The storage temperature range is −65 to +150°C.
- What is the junction temperature under bias for the 74HC02DTR2G?
The junction temperature under bias is +150°C.
- Can unused inputs of the 74HC02DTR2G float?
No, unused inputs must be held HIGH or LOW; they may not float.
- What are some common applications of the 74HC02DTR2G?
Common applications include interface circuits between 5 V and 3 V systems, battery backup systems, and high-speed digital logic circuits.
