74LCX16652MEA

Overview

The 74LCX16652MEA is a low-voltage transceiver and register featuring sixteen non-inverting bidirectional bus transceivers with 3-STATE outputs. It supports multiplexed transmission of data directly from the input bus or from internal registers, clocked by HIGH logic level transitions on CPABn or CPBAn pins. Designed for 2.3V to 3.6V VCC applications, it interfaces with 5V signal environments via 5V tolerant inputs and outputs. Fabricated using advanced CMOS technology, it achieves high-speed operation while maintaining low power dissipation.

Feature Summary

• Provides multiplexed transmission of data between A and B buses through internal registers or real-time transfer modes controlled by select inputs.
• Features 5V tolerant inputs and outputs, allowing safe interfacing between low-voltage (2.5V/3.3V) systems and 5V signal environments.
• Implements patented noise and EMI reduction circuitry to minimize electromagnetic interference during switching operations.

Applications

• Low-voltage memory buffer applications
• Clock drivers and buffered oscillators
• Multipoint bus architectures requiring registered data storage

Procurement Notes

Verify that the ordering code matches the specific package type required, as the device is available in both SSOP and TSSOP configurations. Confirm whether tape and reel packaging is needed by checking for the 'X' suffix in the part number. Ensure compatibility with the target system's voltage levels and temperature range specifications before finalizing procurement.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer with optional registration capabilities at low voltages. The 5V tolerance feature makes it suitable for bridging different voltage domains without additional level shifters. Consider the propagation delay and output drive current requirements to ensure signal integrity across the bus lines.

Part Context

This device belongs to the LCX family of low-voltage CMOS logic devices manufactured originally by Fairchild Semiconductor. It serves as a registered bus transceiver designed for high-speed data handling in portable and battery-powered applications where power efficiency and voltage compatibility are critical design constraints.

Replacement Considerations

Check datasheets for equivalent parts from other manufacturers such as NXP or Texas Instruments within the same logic family. Verify pinout compatibility and electrical characteristics like propagation delay and supply voltage ranges to ensure functional interchangeability in existing designs.

FAQ

How does the device handle data storage versus real-time transfer?

Data can be stored in internal D flip-flops upon LOW-to-HIGH clock transitions or transferred in real-time by enabling both Output Enable pins simultaneously, reinforcing the input state on the output bus.

What is the maximum quiescent supply current?

The maximum quiescent supply current (ICC) is specified as 20 µA when the inputs are tied to VCC or GND within the operating voltage range.