SN74HC623DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC623DWR is an octal bus transceiver in the HC logic family, housed in a 20-pin SOIC package. It operates on a supply voltage range of 2 V to 6 V with a maximum static current of 80 µA. The device provides high-current 3-state outputs capable of driving up to 15 LSTTL loads, featuring ±6 mA output drive at 5 V and low input current of 1 µA max. Typical propagation delay is 8 ns. It supports asynchronous two-way communication between data buses with dual-enable inputs for flexible timing control.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Dual-output enable configuration allows independent or simultaneous control of data flow direction between A and B buses.
• Lock bus-latch capability enables data storage by simultaneously enabling both OEAB and OEBA inputs while other sources are isolated.
• High-current 3-state outputs provide robust drive strength suitable for connecting multiple loads across system buses.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus-oriented memory and register implementations
• Clock drivers and bus transceivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix matches the required packaging format, as the 'DWR' designation indicates tape and reel delivery. Confirm that the component meets RoHS compliance standards and check the operating temperature range requirements against your application environment. Ensure all unused inputs are tied to VCC or GND to maintain proper operation.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer with latching functionality is required. The HC series offers lower power consumption compared to older logic families while maintaining compatibility with standard TTL loads. Consider the wide operating voltage range if interfacing with systems utilizing varying supply levels.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments SN74HC623 series of octal bus transceivers. It is designed for high-speed digital applications requiring reliable data transmission between buses. The device integrates true logic functionality with advanced control features to manage complex bus architectures efficiently.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC645DWR

Buffers, Drivers, Receivers, Transceivers FAQ

How does the SN74HC623DWR achieve data latching?

Data latching occurs when both output-enable inputs (OEAB and OEBA) are simultaneously enabled, causing the outputs to reinforce their inputs and hold the last state if other bus sources are in a high-impedance state.

What is the function of the OEAB and OEBA inputs?

These dual-enable inputs control the direction of data flow. OEAB enables transmission from the B bus to the A bus, while OEBA enables transmission from the A bus to the B bus. Asserting both isolates the device or enables latching depending on bus states.