74HCT240N,652

Overview

The 74HCT240N,652 is a high-speed Si-gate CMOS octal inverting buffer and line driver manufactured by NXP USA Inc. It features dual control of 3-state outputs via active LOW enable inputs (1OE and 2OE). The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. It utilizes a DIP20 plastic dual in-line package with 20 leads.

Feature Summary

• Inverting 3-state outputs controlled by dedicated enable inputs
• ESD protection exceeding 2000 V per Human Body Model standard
• Pin compatible with Low-Power Schottky TTL (LSTTL)
• Compliance with JEDEC standard no. 7 A

Applications

• High-speed bus-oriented transmissions
• Clock buffering and driving
• Memory address decoding

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Confirm current product status as manufacturing availability may change. Ensure input signal levels match HCT logic thresholds for proper operation at the specified supply voltage.

Selection Notes

Select this component when inverting functionality and 3-state bus isolation are required. The HCT series ensures compatibility with TTL-driven systems while offering CMOS low power consumption. Verify that the DIP20 package meets the PCB layout requirements for the target application environment.

Part Context

This part belongs to the 74HCT240 family of octal buffers. It shares functional similarities with the non-inverting 74HCT244 but provides inverted output signals. The device is designed for applications requiring robust signal driving capabilities across wide industrial temperature ranges.

Replacement Considerations

Direct pin-compatible substitutes include other manufacturers' 74HCT240 variants. Verify electrical characteristics such as propagation delay and output drive strength before substitution.