Overview
The SN74HC04D is a hex inverter integrated circuit produced by Texas Instruments. This device contains six independent inverters, each performing the Boolean function Y = A in positive logic. It is part of the 74HC series, known for its high-speed CMOS logic and wide operating voltage range from 2 V to 6 V. The SN74HC04D is available in a 14-pin SOIC package, making it suitable for a variety of digital logic applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage (VCC) | 2 | - | 6 | V |
| Operating Temperature (TA) | -40 | - | 85 | °C |
| Propagation Delay (tpd) at VCC = 2 V | 45 | 95 | 120 | ns |
| Propagation Delay (tpd) at VCC = 4.5 V | 9 | 19 | 24 | ns |
| Propagation Delay (tpd) at VCC = 6 V | 8 | 16 | 20 | ns |
| Transition Time (tt) at VCC = 2 V | 38 | 75 | 95 | ns |
| Transition Time (tt) at VCC = 4.5 V | 8 | 15 | 19 | ns |
| Transition Time (tt) at VCC = 6 V | 6 | 13 | 16 | ns |
| Input Leakage Current (II) | - | - | ±1 | µA |
| Supply Current (ICC) | - | - | 20 | µA |
| Input Capacitance (Ci) | - | - | 10 | pF |
Key Features
- Buffered Inputs: Ensures stable and reliable input signals.
- Wide Operating Voltage Range: Operates from 2 V to 6 V, making it versatile for various applications.
- Wide Operating Temperature Range: Functional from –40°C to +85°C, suitable for harsh environments.
- High Fanout Capability: Supports up to 10 LSTTL loads, enhancing its utility in complex circuits.
- Low Power Consumption: Significant power reduction compared to LSTTL logic ICs.
- Balanced CMOS Push-Pull Outputs: Allows the device to sink and source similar currents, ensuring balanced output performance.
- Clamp Diode Structure: Includes positive and negative clamping diodes to protect against voltage spikes.
Applications
- Synchronizing Inverted Clock Inputs: Useful in timing circuits where clock signals need to be inverted.
- Debouncing Switches: Helps in stabilizing switch inputs to prevent multiple triggers.
- Inverting Digital Signals: General-purpose inverter for digital logic circuits.
- Adding Stages to Counters: Can be used to add an additional stage to counters with external flip-flops.
Q & A
- What is the operating voltage range of the SN74HC04D?
The SN74HC04D operates from 2 V to 6 V.
- What is the maximum operating temperature for the SN74HC04D?
The maximum operating temperature is +85°C.
- How many independent inverters does the SN74HC04D contain?
The device contains six independent inverters.
- What is the typical propagation delay at VCC = 4.5 V?
The typical propagation delay at VCC = 4.5 V is 19 ns.
- What is the input leakage current for the SN74HC04D?
The input leakage current is ±1 µA.
- Can the SN74HC04D be used to debounce switches?
Yes, it can be used to debounce switches and stabilize switch inputs.
- What is the significance of the clamp diode structure in the SN74HC04D?
The clamp diode structure protects the device against voltage spikes and ensures safe operation.
- How many LSTTL loads can the SN74HC04D support?
The device can support up to 10 LSTTL loads.
- What is the typical supply current for the SN74HC04D at VCC = 6 V?
The typical supply current is 20 µA.
- Can unused inputs be left floating in the SN74HC04D?
No, unused inputs must be terminated at VCC or GND.
