SN74HC623N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC623N is an octal bus transceiver from the HC logic family, designed for asynchronous two-way communication between data buses. It operates within a wide supply voltage range of 2 V to 6 V and features high-current 3-state outputs capable of driving up to 15 LSTTL loads. The device includes dual output-enable inputs (OEAB and OEBA) that control data flow direction or isolate the buses. Simultaneous activation of both enables allows the device to store data by reinforcing inputs. Typical propagation delay is 8 ns with maximum power consumption of 80 µA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Dual-output enable configuration provides flexible timing control and bus isolation capabilities
• Lock bus-latch functionality allows data storage when both enable inputs are active
• High-current 3-state outputs support direct interfacing with multiple LSTTL loads
• Wide operating voltage range accommodates systems from 2 V to 6 V

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus-oriented memory and register implementations
• Control signal transmission and routing

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix matches the required package type, as the base part number covers multiple physical formats. Confirm the temperature grade corresponds to the application environment, noting that the N suffix indicates a commercial grade suitable for -40°C to +85°C operation. Ensure input pins are tied to valid logic levels during operation to prevent undefined states.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring bidirectional data transfer with optional latching capability. The HC series offers low static power consumption compared to older logic families. Verify that the system voltage falls within the 2 V to 6 V range and that the load requirements do not exceed the specified output drive currents. Consider the PDIP-20 package constraints if through-hole mounting is mandatory.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74HC series of high-speed CMOS logic products. The HC623 variant specifically addresses applications needing octal bus transceivers with latch functionality. It serves as a bridge between microprocessors and peripheral devices in standard digital logic environments.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN54HC623J

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device achieve data storage?

Data is stored by simultaneously enabling both OEAB and OEBA inputs. In this state, each output reinforces its corresponding input, maintaining the last state on the bus lines.

What is the function of the OEAB and OEBA inputs?

These dual enable inputs control the direction of data flow. Activating one allows transmission from one bus to the other, while activating both isolates the buses or enables the latch mode.