74LVCH32245AEC,557

Overview

The 74LVCH32245AEC,55 is a 32-bit bus transceiver featuring non-inverting 3-state outputs in both send and receive directions. It includes four output enable (nOE) inputs for cascading and four direction control (nDIR) inputs. The device operates with a supply voltage range of 1.2 V to 3.6 V and accepts input voltages up to 5.5 V. It is housed in a 96-ball LFBGA package (SOT536-1) with dimensions of 13.5 x 5.5 x 1.05 mm. Operating temperatures extend from -40 °C to +125 °C.

Feature Summary

• Provides 5 V tolerant inputs and outputs for interfacing with 5 V logic systems.
• Features bus hold on all data inputs to eliminate the need for external pull-up resistors.
• Ensures high-impedance state during power-up or power-down when nOE is tied to VCC.
• Complies with JEDEC standards for low-voltage CMOS devices.

Applications

• Mixed 3.3 V and 5 V applications
• High-density memory interfaces
• Clock drivers and buffering

Procurement Notes

Verify the specific ordering suffix '55' against current NXP documentation to confirm packaging details. Confirm that the component meets the required temperature range specifications for your application environment. Ensure compatibility with the 96-LFBGA footprint during PCB layout. Check for any recent product change notices regarding this part number.

Selection Notes

Select this component for designs requiring 32-bit bidirectional data transfer with independent direction control per byte group. Consider the low inductance multiple power and ground pins for noise reduction. Verify that the input voltage levels match the source logic family. Evaluate the package size constraints against available board space.

Part Context

This device belongs to the 74LVCH series of low-voltage CMOS logic components. It is manufactured by NXP Semiconductors. The part is designed for high-speed data transmission in portable and battery-powered applications due to its low power consumption characteristics.

Replacement Considerations

Consult official NXP documentation for verified substitute part numbers. Do not assume functional equivalence with other 32-bit transceivers without verifying pinout and electrical specifications.

FAQ

How does the device handle unused inputs?

All data inputs have bus hold functionality, which eliminates the need for external pull-up resistors to hold unused inputs at a defined logic level.

What is the function of the nOE pins?

The four output enable (nOE) inputs control the outputs so that the buses are effectively isolated when disabled, ensuring a high-impedance state.