74LCX245BQX

Overview

The onsemi 74LCX245BQX is an octal bus transceiver belonging to the 74LCX logic family. It provides bidirectional data transmission across eight channels with three-state outputs. The device operates within a supply voltage range of 1.65V to 3.6V and features 5V-tolerant inputs and outputs, allowing safe interfacing between low-voltage components and 5V systems. It utilizes a TSSOP-20 package.

Feature Summary

• Bidirectional data transfer capability for eight-bit wide buses
• Three-state output design enabling multiple devices on shared lines
• 5V tolerant input and output structure for mixed-voltage compatibility

Applications

• Memory buffer applications in consumer electronics
• Clock driving and buffering in high-speed digital circuits
• Bus-oriented communications between low-voltage and 5V subsystems

Procurement Notes

Verify the specific suffix 'BQX' against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements for your target market. Confirm lead times and availability directly with authorized distributors as stock levels fluctuate.

Selection Notes

Select this component when designing systems requiring an octal transceiver with 5V tolerance at low voltages. It serves as a suitable replacement for older 74HC or 74HCT series parts where lower power consumption and wider voltage tolerance are required. Verify that the operating voltage range matches the system's VCC supply.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices. The LCX series is designed for high-speed operation while maintaining low power dissipation. The 245 variant specifically denotes an octal bus transceiver, distinguishing it from unidirectional buffers like the 244 or single-driver variants.

FAQ

Is the 74LCX245BQX compatible with 5V logic signals?

Yes, the device features 5V tolerant inputs and outputs, allowing it to interface safely with 5V logic systems while operating on a lower supply voltage.

What is the function of the DIR pin?

The Direction (DIR) pin controls the direction of data flow. A HIGH level directs data from port A to port B, while a LOW level directs data from port B to port A.