CD74HCT241E

Overview

The CD74HCT241E is a dual four-bit bus driver manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and features eight true outputs with three-state capability. The device utilizes HCT CMOS technology, ensuring compatibility with standard TTL logic inputs while maintaining low power consumption. It supports a maximum propagation delay of 38 nanoseconds at nominal supply conditions. The component is housed in a 20-pin plastic DIP package and is rated for operation across an extended temperature range from -55°C to +125°C.

Feature Summary

• Dual four-bit configuration providing independent control over two data buses
• Three-state output design allowing direct connection to system data lines
• HCT input structure compatible with standard transistor-transistor logic levels

Applications

• High-speed data bus drivers in computing systems
• Clock drivers and buffer circuits
• Memory address decoding interfaces

Procurement Notes

Verify the manufacturer marking on the component body to confirm it originates from Texas Instruments rather than other licensees such as Renesas or Thomson. Ensure the suffix 'E' corresponds to the specific 20-pin plastic DIP package variant required for your printed circuit board footprint. Cross-reference the date code against current production status to ensure availability of fresh stock.

Selection Notes

Select this component when a dual four-bit buffer with three-state outputs is required for 5V logic systems. The HCT series ensures electrical compatibility with older TTL standards while offering improved noise immunity compared to basic HC variants. Consider the thermal performance of the DIP-20 package if high ambient temperatures are expected in the final assembly environment.

Part Context

This part belongs to the Texas Instruments 74HCT logic family, which bridges the gap between legacy TTL requirements and modern CMOS efficiency. The 241 designation specifically identifies the device as a bidirectional bus transceiver with tri-state outputs, widely used in digital communication architectures requiring signal isolation and direction control.

Replacement Considerations

The CD74HC241E serves as a functional equivalent but lacks the specific HCT input threshold characteristics. Verify that the host circuit can tolerate the different input voltage thresholds associated with standard HC technology before substituting.