Overview
The CD74HCT08M96G4 is a quadruple 2-input AND gate integrated circuit produced by Texas Instruments. This device is part of the HCT (High-Speed CMOS) logic family and is designed to operate with TTL (Transistor-Transistor Logic) input levels while providing the low power consumption of CMOS (Complementary Metal-Oxide-Semiconductor) technology.
Each gate within the IC performs the Boolean function Y = A ● B in positive logic, making it suitable for various digital logic applications. The device is available in several package options, including SOIC (Small Outline Integrated Circuit), PDIP (Plastic Dual In-Line Package), and CDIP (Ceramic Dual In-Line Package).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | -0.5 | 7 | V | |
| Operating Temperature Range | -55 | 125 | °C | |
| Propagation Delay (A or B to Y) | 25 | 31 | 38 | ns (at VCC = 4.5V, CL = 50pF) |
| Transition Time (Y) | 15 | 19 | 22 | ns (at VCC = 4.5V, CL = 50pF) |
| Continuous Output Current | ±20 | mA | ||
| Input Clamp Current | ±20 | mA (VI < -0.5V or VI > VCC + 0.5V) | ||
| Power Dissipation Capacitance per Gate | 51 | pF (at VCC = 5V, no load) |
Key Features
- LSTTL input logic compatible – VIL(max) = 0.8V, VIH(min) = 2V
- CMOS input logic compatible – II ≤ 1µA at VOL, VOH
- Buffered inputs
- Operation voltage range: 4.5V to 5.5V
- Wide operating temperature range: -55°C to +125°C
- Supports fanout up to 10 LSTTL loads
- Significant power reduction compared to LSTTL logic ICs
Applications
- Combining power good signals
- Enabling digital signals
- Direct control of RESET pins in motor controllers or other digital systems requiring multiple input signals to be HIGH before enabling
Q & A
- What is the CD74HCT08M96G4 used for?
The CD74HCT08M96G4 is used as a quadruple 2-input AND gate in digital logic circuits, combining multiple input signals to produce an output based on the Boolean function Y = A ● B.
- What are the operating voltage and temperature ranges of the CD74HCT08M96G4?
The operating voltage range is 4.5V to 5.5V, and the operating temperature range is -55°C to +125°C.
- What types of inputs does the CD74HCT08M96G4 support?
The device supports both LSTTL and CMOS input logic levels.
- How many AND gates are included in the CD74HCT08M96G4?
The device contains four independent 2-input AND gates.
- What is the typical propagation delay of the CD74HCT08M96G4?
The typical propagation delay is 31 ns at VCC = 4.5V and CL = 50pF.
- Can the CD74HCT08M96G4 drive large capacitive loads?
The device can drive loads with a total capacitance less than or equal to the maximum load listed in the Switching Characteristics. For larger capacitive loads, a series resistor is recommended to limit output current.
- What are the package options available for the CD74HCT08M96G4?
The device is available in SOIC, PDIP, and CDIP packages.
- How does the CD74HCT08M96G4 handle unused outputs?
Unused outputs can be left floating but should not be connected directly to VCC or ground.
- What are the thermal considerations for the CD74HCT08M96G4?
The device has specific thermal metrics such as junction-to-board thermal resistance, which must be considered to ensure proper operation and prevent overheating.
- How should the inputs be driven to avoid excessive current consumption and oscillations?
Inputs should have fast edge rates as defined by the input transition time in the Recommended Operating Conditions. For slow or noisy input signals, a device with a Schmitt-trigger input should be used to condition the signal.
