74LCX16652MTD

Overview

The Fairchild Semiconductor 74LCX16652MTD is a low voltage registered bus transceiver featuring two non-inverting 8-bit elements in a 56-pin TSSOP package. It operates with VCC specifications ranging from 2.3V to 3.6V and provides 5V tolerant inputs and outputs for interfacing with 5V systems. The device integrates D-type flip-flops, allowing data on the A or B bus to be clocked into internal registers when the appropriate clock pin goes HIGH. Output Enable pins (OEAB, OEBA) control the transceiver function, supporting multiplexed transmission of data directly from the input bus or internal registers.

Feature Summary

• Integrates D-type flip-flops for registered data storage and multiplexed transmission capabilities
• Provides 5V tolerant inputs and outputs to facilitate safe interfacing between low voltage and 5V signal environments
• Features independent Output Enable pins (OEAB, OEBA) for precise control of the transceiver direction and state

Applications

• Low voltage memory interface circuits requiring registered data paths
• System interconnects bridging 3.3V logic domains with 5V peripheral devices
• High-density data bus architectures utilizing multiplexed register transmission

Procurement Notes

Verify the specific manufacturer suffix and tape/reel configuration against current Fairchild Semiconductor documentation, as packaging details may vary by production lot. Confirm that the 56-TSSOP footprint matches your PCB design constraints. Ensure compatibility with the 2.3V to 3.6V operating range for your target application voltage. Cross-reference the datasheet revision date to confirm electrical characteristics align with your system requirements.

Selection Notes

Select this component when a registered bus transceiver with 5V tolerance is required for 3.3V systems. The dual 8-bit structure supports wide data buses without additional external latching. Consider the propagation delay and output drive strength relative to your bus loading conditions. Verify that the TSSOP-56 package size fits within your available board space and thermal management plan.

Part Context

This part belongs to the LCX series of low voltage CMOS logic devices designed for high-speed operation with low power dissipation. The LCX family specifically addresses the need for 5V tolerance in modern low voltage applications. As a registered transceiver, it combines buffering with storage, reducing the need for separate latch components in complex digital designs.

Replacement Considerations

Check for direct equivalents such as the SN74LVTH16652DL from Texas Instruments, noting differences in propagation delay and output current specifications. Verify pinout compatibility before substitution. Review datasheets for any variations in electrical characteristics or operating temperature ranges that might affect system performance.