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HEF40244BP,652
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Product Detailed Parameters
- Description：IC BUFFER NON-INVERT 15V 20DIP
- Series：4000B
- Mfr：NXP USA Inc.
- Package：Tube
- Logic Type：Buffer, Non-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 HEF40244BP,652 is an octal non-inverting buffer with 3-state outputs manufactured by NXP USA Inc. It utilizes a 20-lead plastic DIP package (SOT146-1). The device operates within a supply voltage range of 3 V to 18 V, though absolute maximum ratings specify up to 20 V. Propagation delays vary from 30 ns to 95 ns depending on the supply voltage and load capacitance. Output drive capability reaches ±25 mA DC source or sink current. Input hysteresis ranges from 220 mV to 320 mV.
Feature Summary
- Features high current output stages suitable for driving highly capacitive loads.
- Includes Schmitt-trigger action on all inputs to improve noise immunity and tolerance for slow input transitions.
- Outputs are controlled by active LOW enable inputs (EOA and EOB) to achieve a high impedance OFF-state.
Applications
- Bus driver applications requiring tri-state control
- Driving highly capacitive loads in digital circuits
- Systems requiring improved noise immunity via Schmitt-trigger inputs
Procurement Notes
Verify the specific ordering suffix
Selection Notes
Select this component when an octal buffer with tri-state capability is required. Ensure the design accommodates the propagation delay characteristics relative to the operating frequency and load capacitance. Verify that the power supply voltage remains within the specified operational limits to maintain correct logic levels and output drive strength.
Part Context
This part belongs to the HEF4000B series of LOCMOS integrated circuits. It is pin and functionally compatible with the TTL '244' device family. The datasheet specifies it as a product specification document from Philips Semiconductors, now NXP.
Replacement Considerations
HEF40244BD, HEF40244BT, HEF40244BTD, HEF40244BPN
FAQ
How are the 3-state outputs controlled?
The outputs are controlled by two active LOW output enable inputs, EOA and EOB. A HIGH level on these inputs causes the respective outputs to assume a high impedance OFF-state.
What is the purpose of the input hysteresis?
The device features hysteresis on all inputs, which improves noise immunity and makes the circuit highly tolerant to slower input rise and fall times due to Schmitt-trigger action.
