74HCT241PW,118

Overview

The Nexperia 74HCT241PW,118 is an octal buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 33 ns propagation delay at 4.5 V. The device utilizes a TSSOP20 (SOT360-1) package with 20 leads. It includes two output enable inputs (1OE active LOW, 2OE active HIGH) controlling four outputs each. Input levels are compatible with TTL logic, and the component functions as either one 8-bit buffer or two 4-bit buffers.

Feature Summary

• Features non-inverting three-state outputs controlled by separate enable inputs for distinct bus segments.
• Incorporates input clamp diodes to facilitate interfacing with voltages exceeding the supply rail using current limiting resistors.
• Provides high noise immunity and robust latch-up performance compliant with JESD 78 Class II Level B standards.

Applications

• Octal bus interface systems requiring directional data flow control
• Driving bus lines in microprocessor-based architectures
• Converting CMOS logic signals to TTL-compatible levels

Procurement Notes

Verify the specific ordering suffix '118' corresponds to the TSSOP20 plastic thin shrink small outline package (SOT360-1). Confirm that the HCT variant is selected over HC due to the requirement for TTL input threshold compatibility. Ensure the temperature range specification meets the operational environment requirements of -40 °C to +125 °C before finalizing procurement orders.

Selection Notes

Select this component when TTL-level input compatibility is required alongside CMOS low power dissipation characteristics. The dual independent output enables allow flexible configuration for splitting an octal bus into two separate 4-bit sections. Verify that the operating voltage remains strictly between 4.5 V and 5.5 V to ensure correct logic threshold behavior and avoid exceeding absolute maximum ratings.

Part Context

This part belongs to the Nexperia 74HCT series of logic integrated circuits, designed for operation with standard 5 V logic supplies. The PW suffix indicates the TSSOP20 surface-mount package, which offers a compact footprint suitable for space-constrained printed circuit board designs. It serves as a direct functional replacement for similar octal buffer devices within the industry-standard 74xx logic families.

Replacement Considerations

The 74HC241PW,118 serves as a pin-compatible alternative but requires CMOS-level input signals rather than TTL levels. Designers must verify that input voltage thresholds align with the source logic family before substituting the HC variant for the HCT version to prevent signal integrity issues.

FAQ

How does the 74HCT241 handle input voltages higher than VCC?

The device includes input clamp diodes, allowing it to interface with voltages exceeding VCC when used with appropriate current-limiting resistors.

What is the function of the 1OE and 2OE pins?

These are output enable inputs; 1OE is active LOW and controls outputs 1Y0-1Y3, while 2OE is active HIGH and controls outputs 2Y0-2Y3.