Overview
The SN74HC11DRG4, produced by Texas Instruments, is a triple 3-input AND gate integrated circuit. This device is part of the 74HC series, known for its high-speed CMOS logic and low power consumption. Each gate within the SN74HC11 performs the Boolean function Y = A ● B ● C in positive logic, making it versatile for various digital logic applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2 | 5 | 6 | V |
| VIH (High-level Input Voltage) | 1.5 (VCC=2V), 3.15 (VCC=4.5V), 4.2 (VCC=6V) | V | ||
| VIL (Low-level Input Voltage) | 0.5 (VCC=2V), 1.35 (VCC=4.5V), 1.8 (VCC=6V) | V | ||
| TA (Operating Free-Air Temperature) | -40 | 85 | °C | |
| IOH (Output High Current) | -20 | mA | ||
| IOL (Output Low Current) | 20 | mA | ||
| tpd (Propagation Delay) | 8 (VCC=6V), 10 (VCC=4.5V), 35 (VCC=2V) | ns | ||
| tt (Transition Time) | 5 (VCC=6V), 7 (VCC=4.5V), 25 (VCC=2V) | ns | ||
| Package Type | SOIC (14 pins) | |||
| Body Size (Nom) | 8.70 mm × 3.90 mm |
Key Features
- Buffered inputs
- Wide operating voltage range: 2 V to 6 V
- Wide operating temperature range: -40°C to +85°C
- Supports fanout up to 10 LSTTL loads
- Significant power reduction compared to LSTTL logic ICs
- Balanced CMOS push-pull outputs
- Capable of driving larger currents with proper load management
Applications
- Combining power good signals
- Enabling digital signals
- General-purpose digital logic circuits
- Control and interface circuits
Q & A
- What is the primary function of the SN74HC11DRG4?
The SN74HC11DRG4 is a triple 3-input AND gate, performing the Boolean function Y = A ● B ● C in positive logic.
- What is the operating voltage range of the SN74HC11DRG4?
The operating voltage range is from 2 V to 6 V.
- What is the operating temperature range of the SN74HC11DRG4?
The operating temperature range is from -40°C to +85°C.
- How many LSTTL loads can the SN74HC11DRG4 support?
The device supports fanout up to 10 LSTTL loads.
- What type of outputs does the SN74HC11DRG4 have?
The device has balanced CMOS push-pull outputs.
- How should unused inputs be handled?
Unused inputs must be terminated to either VCC or ground, using pull-up or pull-down resistors if necessary.
- What are the recommended input transition rates?
The recommended input transition rates are defined in the Recommended Operating Conditions to prevent oscillations and damaging shoot-through current.
- Can unused outputs be left floating?
Yes, unused outputs can be left floating but should not be connected directly to VCC or ground.
- What is the significance of the decoupling capacitor in the layout?
A decoupling capacitor from VCC to GND, placed close to the device, is essential for optimal performance and noise reduction.
- How should the capacitive load at the output be managed?
The capacitive load at the output should be ≤ 70 pF to ensure optimal performance.
- What are the thermal considerations for the SN74HC11DRG4?
Thermal issues are rarely a concern, but power consumption and thermal increase can be calculated using the provided application report.
