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Product Detailed Parameters
- Description：IC GATE AND 4CH 2-INP 14SOIC
- Series：74AHCT
- Mfr：Texas Instruments
- Package：Tube
- Logic Type：AND Gate
- Number of Circuits：4
- Number of Inputs：2
- Features：-
- Voltage - Supply：4.5V ~ 5.5V
- Current - Quiescent (Max)：2 µA
- Current - Output High, Low：8mA, 8mA
- Input Logic Level - Low：0.8V
- Input Logic Level - High：2V
- Max Propagation Delay @ V, Max CL：7.9ns @ 5V, 50pF
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：14-SOIC
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Grade：-
- Qualification：-
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Overview
The SN74AHCT08DE4 is a quadruple 2-input positive-AND gate from the Texas Instruments SNx4AHCT08 family. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -40°C to 125°C. The device features TTL-compatible inputs, allowing up-conversion from 3.3 V logic levels to 5 V. Electrical characteristics include a low-level output current of 8 mA and a high-level output current of -8 mA. Propagation delay is specified at a maximum of 9 ns under a 50 pF load condition.
Feature Summary
- TTL-voltage compatible inputs enable seamless up-conversion from 3.3 V sources to 5 V logic systems.
- Low-drive CMOS architecture provides slow rise and fall times to minimize output signal ringing.
- High electrostatic discharge protection ratings ensure robustness against human-body and charged-device model events.
Applications
- Servers
- Network switches
- PCs and notebooks
- Electronic points-of-sale
Procurement Notes
Verify that the DE4 suffix corresponds to the specific package variant intended for your design, as the SN74AHCT08 series utilizes multiple package options including SOIC, SSOP, TSSOP, and VQFN. Confirm the exact pinout and thermal resistance values associated with the selected physical package before finalizing procurement. Ensure compatibility with standard surface-mount assembly processes.
Selection Notes
Select this component when designing bus-interface applications where output ringing must be minimized due to its low-drive nature. It is suitable for interfacing 3.3 V logic buses with 5 V peripherals. Consider the specific package thermal metrics if high ambient temperatures are expected. Unused inputs must be tied to VCC or GND to prevent undefined operational states.
Part Context
This part belongs to the SNx4AHCT08 family of quadruple 2-input positive-AND gates manufactured by Texas Instruments. The 'E4' suffix typically denotes lead-free packaging compliant with RoHS standards. The family includes variants such as SN74AHCT08DR, SN74AHCT08PWR, and SN74AHCT08RGYR, which share identical electrical functionality but differ in physical package dimensions and mounting styles.
Replacement Considerations
SN74AHCT08DR
FAQ
How does the SN74AHCT08 handle input signals from 3.3 V logic?
The device features TTL-compatible inputs that allow up-conversion from 3.3 V logic levels to 5 V, making it suitable for mixed-voltage interfaces.
What is the purpose of the low-drive output characteristic?
The low-drive outputs produce slow rise and fall times, which reduces ringing on the output signal, making the device ideal for bus-interface applications where overshoot and undershoot are concerns.
