SN74HC623DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC623DW is an octal bus transceiver in a 20-pin SOIC package. It operates on a supply voltage 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 via dual-enable inputs (OEAB and OEBA) that allow for lock bus-latch capability when both are enabled simultaneously.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Dual-output enable configuration allows flexible timing control for asynchronous two-way communication between data buses.
• Lock bus-latch capability enables the device to store data by simultaneously enabling both output controls while other sources remain in a high-impedance state.
• High-current 3-state outputs provide sufficient drive strength to interface directly with multiple LSTTL loads.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus-oriented memory and logic applications requiring data storage
• Systems utilizing parallel I/O expansion

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature range. Confirm RoHS compliance status and moisture sensitivity level ratings prior to procurement. Ensure the selected variant aligns with the intended manufacturing process and environmental operating conditions defined in the datasheet.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring bidirectional octal data transfer with integrated latching functionality. The HC logic family ensures compatibility with standard CMOS interfaces across a wide voltage range. Consider the dual-enable architecture if precise control over bus isolation and data retention is necessary for the system timing requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments SN74HC series of high-speed CMOS logic devices. The SN74HC623 specifically functions as an octal bus transceiver with latch capability. It is distinct from standard transceivers like the SN74HC245 due to its unique ability to hold data states through simultaneous enablement of both directional controls.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct functional substitutes include the SNJ54HC623 for military-grade temperature ranges or variants with different packaging such as the SN74HC623N (PDIP). Verify pinout compatibility and electrical characteristics against the original design specifications before substitution.