SN74HCT645PWRG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT645PWRG4 is an octal bus transceiver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a temperature range of -40°C to 85°C. The device features high-current outputs capable of driving up to 15 LSTTL loads, with ±6-mA output drive at 5 V. Typical propagation delay is 14 ns, and maximum ICC is 80 µA. Inputs are TTL-voltage compatible with low input current of 1 µa max.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous two-way communication between data buses via direction control
• Features high-current 3-state outputs for driving multiple LSTTL loads
• Ensures isolation when the output-enable input is deactivated

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Data transmission from A bus to B bus or vice versa
• Bus isolation applications using the output-enable function

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package type and marking code against the datasheet ordering information. Confirm RoHS compliance and lead finish details such as NIPDAU. Ensure the operating temperature range matches system requirements. Check moisture sensitivity level ratings before soldering. Validate part markings against official manufacturer documentation.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring bidirectional data transfer with TTL-compatible inputs. Consider the HCT logic family for compatibility with standard TTL levels. Evaluate the 3-state output capability for bus sharing applications. Verify power consumption limits against system constraints. Assess thermal performance based on the TSSOP package characteristics.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74HCT645 series of octal bus transceivers. It is designed for use in systems needing reliable data transfer between different bus architectures. The HCT technology ensures compatibility with standard TTL logic families while maintaining CMOS low power consumption. It serves as a key interface component in digital communication circuits.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT645DWR

Buffers, Drivers, Receivers, Transceivers FAQ

How does the direction control input affect data flow?

The DIR input determines whether data flows from the A bus to the B bus or from the B bus to the A bus.

What is the purpose of the OE input?

The OE input disables the device, effectively isolating the buses when activated.