CD74HCT243M

Overview

The CD74HCT243M is a single four-bit bus transceiver from the Texas Instruments HCT logic series. It features non-inverting polarity and operates within a supply voltage range of 4.5 V to 5.5 V. The device utilizes a 14-pin SOIC surface-mount package with dimensions of 8.65 mm in length, 3.91 mm in width, and 1.58 mm in height. Electrical characteristics include a maximum propagation delay of 20 ns at 4.5 V with a 50 pF load. Output drive capabilities are specified as -6 mA for high-level output current and 6 mA for low-level output current. Input levels are compatible with TTL standards, while outputs provide CMOS levels.

Feature Summary

• Provides bidirectional data transfer between two buses using a single control signal.
• Features non-inverting logic polarity for direct signal transmission.
• Accepts TTL input voltage levels while driving CMOS loads.

Applications

• Bidirectional data bus drivers
• Memory address drivers
• Signal buffering

Procurement Notes

Verify the specific manufacturer part number against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure that the selected component meets the required operating temperature range and packaging requirements for the intended application environment.

Selection Notes

Select this component when a single four-bit non-inverting bus transceiver is required. Consider the HCT logic series for TTL-compatible inputs and CMOS outputs. Verify that the 14-pin SOIC package fits the available board space and that the 4.5 V to 5.5 V supply voltage aligns with the system design.

Part Context

This component belongs to the Texas Instruments 74HCT logic family, which combines the speed of HC technology with TTL-compatible inputs. The HCT series is designed for use in systems requiring interface between TTL and CMOS logic levels. The CD74HCT243M specifically functions as a four-bit bus transceiver within this family.

Replacement Considerations

Consult official Texas Instruments substitution guides or datasheets for verified equivalent parts. Do not assume cross-manufacturer compatibility without verifying pinouts and electrical parameters.