74HCT7541D,112

Overview

The Nexperia 74HCT7541D,112 is an octal Schmitt trigger 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 the outputs into a high-impedance state when asserted. Inputs utilize Schmitt-trigger action to convert slowly changing signals into sharply defined outputs. The component is housed in a SOIC-20 package (SOT163-1).

Feature Summary

• Octal configuration with eight non-inverting data paths.
• Schmitt-trigger inputs provide noise immunity and jitter-free signal transformation.
• Dual active-low output enables control three-state high-impedance OFF-states.
• Input clamp diodes allow interfacing with voltages exceeding VCC using current limiting resistors.

Applications

• Buffering memory address and data buses.
• Driving capacitive loads on communication lines.
• Level shifting between TTL-compatible logic families.

Procurement Notes

Verify the specific suffix '112' against the manufacturer's ordering information to confirm the SOIC-20 package type and tape-and-reel or tube packaging variant. Confirm the operating temperature range requirements match the -40 °C to +125 °C specification provided in the datasheet before finalizing procurement orders.

Selection Notes

Select this component when an octal buffer with Schmitt-trigger input characteristics is required for noisy environments. Ensure the system operates strictly within the 4.5 V to 5.5 V supply voltage limits defined for the HCT series. Verify that the SOIC-20 footprint aligns with the PCB layout constraints and that the dual enable pin architecture fits the control logic design.

Part Context

This part belongs to the 74HCT family of CMOS logic devices, designed for compatibility with TTL logic levels while offering CMOS power dissipation benefits. The 7541 designation specifically identifies the octal buffer/line driver topology within the broader Nexperia logic portfolio.

Replacement Considerations

The 74HC7541D is the HC-series equivalent with different input threshold specifications. Other octal buffers from various manufacturers may require verification of pinout compatibility and electrical parameter alignment.

FAQ

How do the output enable pins function?

Both OE1 and OE2 are active-low inputs. When either pin is HIGH, all outputs enter a high-impedance OFF-state. Outputs are enabled only when both OE1 and OE2 are LOW.

What is the purpose of the Schmitt triggers on the inputs?

The Schmitt triggers transform slowly changing input signals into sharply defined, jitter-free output signals, providing improved noise immunity compared to standard logic gates.