74HC541D,652

Overview

The Nexperia 74HC541D,652 is an octal non-inverting buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 2.0 V to 6.0 V and utilizes the SO20 plastic small outline package (SOT163-1). The device includes two active-low output enable inputs (OE1 and OE2) that force outputs into a high-impedance state when asserted HIGH. Input clamp diodes allow interfacing with voltages exceeding VCC using current-limiting resistors. Recommended operating temperatures extend from -40 °C to +125 °C.

Feature Summary

• Octal non-inverting buffer/line driver architecture with three-state outputs
• Dual active-low output enables for independent control of bus isolation
• Input clamp diodes facilitate interface to voltages exceeding VCC
• High noise immunity and robust latch-up performance

Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffered clocks
• Carrying registers and transceivers
• Line drivers in communication systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and temperature rating. Confirm RoHS compliance status and REACH SVHC declarations directly with the supplier or via the latest product database before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring high-drive capability across multiple lines with isolated control. Ensure the system logic levels match the CMOS input requirements specified for the HC series. Verify that the load capacitance and propagation delay constraints align with the dynamic characteristics provided in the datasheet for the target supply voltage.

Part Context

This part belongs to the 74HC/HCT family of standard logic integrated circuits manufactured by Nexperia. It serves as a fundamental building block for digital signal routing and buffering in mixed-signal environments. The device is designed to replace older generation logic families while offering improved power dissipation and noise immunity characteristics suitable for modern embedded designs.

Replacement Considerations

Direct functional equivalents include the 74HCT541D,652 variant for TTL-compatible input levels. Other manufacturers producing pin-compatible octal buffers should be evaluated based on matching supply voltage ranges, package dimensions, and electrical parameters such as propagation delay and output drive strength.

FAQ

How are the outputs controlled?

The outputs are controlled by two active-low enable inputs, OE1 and OE2. When either input is HIGH, all outputs enter a high-impedance OFF-state.

What is the function of the input clamp diodes?

The input clamp diodes allow the use of current-limiting resistors to interface the inputs to voltages in excess of VCC without damaging the device.