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HEF40240BP,652
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Product Detailed Parameters
- Description：IC BUFFER INVERT 15V 20DIP
- Series：4000B
- Mfr：NXP USA Inc.
- Package：Tube
- Logic Type：Buffer, Inverting
- Number of Elements：2
- Number of Bits per Element：4
- Input Type：-
- Output Type：3-State
- Current - Output High, Low：62mA, 45mA
- Voltage - Supply：3V ~ 15V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Through Hole
- Package / Case：20-DIP (0.300", 7.62mm)
- Supplier Device Package：20-DIP
- Grade：-
- Qualification：-
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Overview
The HEF40240BP,652 is an octal inverting buffer with 3-state outputs manufactured by NXP Semiconductors. It operates within a recommended VDD power supply range of 3 V to 15 V referenced to VSS. The device features output stages with high current capability suitable for driving highly capacitive loads. Propagation delays vary from 30 ns to 190 ns depending on the load capacitance and supply voltage. Input hysteresis improves noise immunity, making inputs tolerant to slow rise and fall times.
Feature Summary
- Octal inverting buffers with 3-state outputs controlled by active LOW enable inputs
- High current output capability suitable for driving highly capacitive loads
- Input hysteresis provides improved noise immunity and tolerance to slow input transitions
Applications
- Driving highly capacitive loads
- General-purpose digital logic buffering
- Systems requiring noise-immune signal inversion
Procurement Notes
Verify the specific package variant (DIP20) against the required footprint. Confirm that the operating environment remains within the specified -40 °C to +85 °C temperature range. Ensure unused inputs are connected to VDD, VSS, or another input to prevent undefined states. Check for compliance with JEDEC standard JESD 13-B if required by design specifications.
Selection Notes
Select this component when an octal inverting buffer with tri-state control is required. It offers pin and functional compatibility with TTL '240' devices. Consider the propagation delay characteristics relative to the expected load capacitance and supply voltage. Verify that the high current output capability meets the drive requirements of the downstream circuitry.
Part Context
This part belongs to the HEF4000B series of CMOS logic devices. It is designed for general-purpose applications where robust noise immunity and high drive capability are necessary. The DIP20 package facilitates through-hole mounting on printed circuit boards.
Replacement Considerations
HEF40240BT
FAQ
How are the 3-state outputs controlled?
The 3-state outputs are controlled by the output enable inputs nOE. A HIGH level on nOE causes the outputs to assume a high-impedance OFF-state.
What is the function of the input hysteresis?
The device features hysteresis on all inputs to improve noise immunity. Schmitt-trigger action makes the inputs highly tolerant to slow input rise and fall times.
