74HCT541DB,118

Overview

The Nexperia 74HCT541DB,118 is an octal non-inverting buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V. The device includes two active-low output enable inputs (OE1 and OE2) that force outputs into a high-impedance state when asserted HIGH. Inputs are equipped with clamp diodes for interfacing with voltages exceeding VCC. It utilizes the SO20 plastic small outline package (SOT163-1).

Feature Summary

• Octal non-inverting buffering with three-state output capability controlled by dual active-low enables.
• TTL-compatible input levels designed for operation within the 4.5 V to 5.5 V supply voltage range.
• Integrated input clamp diodes allow safe interfacing to signal sources exceeding the supply voltage.
• High noise immunity and robust latch-up performance compliant with JESD 78 Class II Level B standards.

Applications

• Memory address and data bus buffering in digital systems.
• Driving capacitive or transmission line loads in high-speed logic circuits.
• Interface isolation between different logic families requiring level translation.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm the package type and tape-and-reel specifications. Ensure the procurement channel provides traceability to the original manufacturer. Confirm RoHS compliance status matches project requirements before finalizing orders.

Selection Notes

Select this component when an octal buffer with TTL-compatible inputs and three-state control is required. Verify that the system operating voltage falls strictly within the 4.5 V to 5.5 V range. Consider the SO20 package dimensions if board space constraints apply relative to alternative packages like TSSOP.

Part Context

This part belongs to the 74HCT logic family, which bridges CMOS technology with TTL input compatibility. The 74HCT541 variant specifically provides eight channels of non-inverting buffering. It is distinct from the 74HC541 due to its stricter input voltage thresholds optimized for 5 V logic systems.

FAQ

How does the 74HCT541 handle input signals exceeding the supply voltage?

The device incorporates input clamp diodes that permit the use of current-limiting resistors, allowing inputs to interface safely with voltages higher than VCC without damaging the internal circuitry.

What is the function of the OE1 and OE2 pins?

OE1 and OE2 are active-low output enable inputs. When either pin is held at a HIGH logic level, all outputs enter a high-impedance OFF-state, effectively disconnecting them from the bus.