SN74HCT245DBR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT245DBR is an octal bus transceiver manufactured by Texas Instruments, belonging to the HCT logic series. It features eight bidirectional data channels with three-state outputs and non-inverting polarity. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum propagation delay of 30 ns at 4.5 V with a 150 pF load. It provides a low-level output current of 6 mA and a high-level output current of -6 mA. The component is housed in a 20-pin SSOP package and functions over an operating temperature range from -40 °C to +85 °C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides bidirectional data transmission across eight independent channels controlled by a single direction pin.
• Features TTL-compatible inputs that interface directly with standard TTL logic devices while maintaining CMOS outputs.
• Outputs enter a high-impedance state when disabled, allowing safe connection to multiplexed data buses.

Buffers, Drivers, Receivers, Transceivers Applications

• Mobile applications requiring level shifting between different logic families
• Clock drivers and buffer circuits for digital systems
• Bus-oriented architectures connecting microcontrollers to peripheral memory

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'DBR' corresponds to the SSOP-20 package and tape-and-reel orientation before ordering. Confirm that the HCT input thresholds match the source logic family voltage levels in the target design. Ensure the operating environment remains within the specified -40 °C to +85 °C thermal limits to maintain signal integrity and timing specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing 5V TTL logic with 5V CMOS systems requiring bidirectional data flow. It is suitable for designs needing moderate speed performance with robust noise immunity. Consider alternative packages if higher pin density or different thermal characteristics are required for the printed circuit board layout constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74HC(H)245 family of octal bus transceivers. It shares functional similarities with the SN74HC245 but utilizes HCT technology for improved compatibility with legacy TTL inputs. The DBR suffix specifically denotes the surface-mount SSOP-20 packaging format used for automated assembly processes.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

• SN74HCT245DWRE4
• SN74HCT245PW