74LVCH32244AEC,551

Overview

The 74LVCH32244AEC,551 is a 32-bit non-inverting buffer and line driver featuring 3-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and provides 5 V tolerant inputs and outputs for mixed-voltage interfacing. The device utilizes a MULTIBYTE flow-trough architecture with eight output enable inputs (nOE) to control the high-impedance state. Key electrical parameters include a typical propagation delay of 3.0 ns at 3.3 V, input capacitance of 5.0 pF, and power dissipation capacitance of 12 pF per gate when enabled. It is housed in a 96-ball LFBGA package.

Feature Summary

• Provides 5 V tolerance on both inputs and outputs, enabling direct interface with 5 V logic systems while operating at lower voltages.
• Incorporates bushold data inputs to maintain valid logic levels without requiring external pull-up resistors for unused or floating pins.
• Features low inductance multiple power and ground pins designed to minimize noise and ground bounce during operation.

Applications

• Interfacing between 3.3 V and 5 V logic domains
• Clock buffering and distribution
• Data bus driving

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm the specific ordering suffix matches the required package and temperature grade. Check current product status as availability may vary. Ensure compliance with RoHS directives if applicable to the target assembly process.

Selection Notes

Select this component for applications requiring high-speed 32-bit data transmission with mixed voltage compatibility. Consider the 96-pin LFBGA package constraints regarding PCB layout and thermal management. Evaluate the 3-state control requirements against system design needs for bus isolation.

Part Context

This part belongs to the 74LVCH series of low-voltage CMOS logic devices. It is manufactured by NXP USA Inc., formerly Philips Semiconductors. The device is designed for high-performance digital applications requiring low power consumption and robust signal integrity in mixed-signal environments.

Replacement Considerations

Consult official replacement lists for obsolete parts. Verify pinout and electrical specifications match before substitution.

FAQ

How is the 3-state output controlled?

The 3-state outputs are controlled by eight active-low output enable inputs (nOE). A HIGH level on any nOE pin forces the corresponding outputs into a high-impedance OFF-state.

What is the function of the bushold feature?

The bushold circuit ensures that data inputs hold their last valid logic state if they become floating, eliminating the need for external pull-up resistors.