74LVCH32245AEC,551

Overview

The 74LVCH32245AEC,551 is a 32-bit bus transceiver featuring non-inverting 3-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and supports input voltages up to 5.5 V. The device includes four output enable (nOE) inputs for cascading and four direction control (nDIR) inputs. It utilizes an LFBGA96 package with dimensions of 13.5 x 5.5 mm. Propagation delay ranges from 1.0 ns to 13.8 ns depending on voltage and temperature.

Feature Summary

• Provides bi-directional data transfer between buses using non-inverting 3-state outputs.
• Features independent direction control via four nDIR pins and isolation via four nOE pins.
• Includes bus hold circuitry on all data inputs to maintain logic states without external pull-up resistors.
• Ensures high-impedance state during power-up or power-down when VCC is zero.

Applications

• Mixed 3.3 V and 5 V system interfacing
• Cascaded multi-byte data bus architectures
• TTL level direct interface applications

Procurement Notes

Verify the specific ordering suffix matches the required temperature range and package variant. Confirm that the component status aligns with current production schedules as availability may vary. Ensure design compatibility with the specified LFBGA96 footprint and ball configuration before finalizing procurement orders.

Selection Notes

Select this component for designs requiring 32-bit wide data paths with independent direction control per byte group. The 5 V tolerant inputs allow direct connection to legacy 5 V logic devices. Verify that the operating voltage falls within the 1.2 V to 3.6 V range and that thermal dissipation requirements are met within the specified ambient temperature limits.

Part Context

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

Replacement Considerations

Check for equivalent parts such as the 74LVCH32245AEC:55 or other 32-bit bus transceivers with similar pinouts and electrical specifications. Ensure any substitute maintains the same 5 V tolerance and 3-state output capabilities.

FAQ

How does the device handle unused data inputs?

All data inputs feature a bus hold circuit that 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 nOE pins control the outputs to effectively isolate the buses when disabled, ensuring a high-impedance state.