74ABT245CPC

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ABT245CPC is an octal bidirectional transceiver with three-state outputs in a 20-lead Plastic Dual-In-Line (PDIP) package. It operates within a supply voltage range of +4.5V to +5.5V and supports an ambient temperature range of -40°C to +85°C. The device provides a current sinking capability of 64 mA and a sourcing capability of 32 mA on both A and B ports. Propagation delays are specified at 1.0 ns minimum, 2.1 ns typical, and 3.6 ns maximum under standard AC load conditions.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional non-inverting buffers for bus-oriented applications
• High impedance glitch-free bus loading during power up and down cycles
• Non-destructive hot insertion capability
• Guaranteed latchup protection

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented data communication systems
• Asynchronous two-way data transfer between buses
• High-speed termination effect mitigation

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the component status as discontinued or obsolete before procurement planning. Confirm that the specific 20-PDIP package variant remains available through authorized distributors or secondary markets. Ensure compatibility with existing PCB footprints and validate that replacement components meet the required electrical specifications for your application.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring high drive strength and bidirectional data flow control. The ABT technology offers faster switching speeds compared to standard logic families. Verify that the system design accommodates the 64 mA sink current capability and ensures proper termination to minimize signal reflections on the bus lines.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ABT series of high-speed CMOS logic devices manufactured by Fairchild Semiconductor, now part of onsemi. The 74ABT245 specifically functions as an octal bus transceiver, providing eight channels of bidirectional data transfer with three-state output control for efficient bus management in digital circuits.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ABT245BN from Texas Instruments is listed as a direct substitute.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the Output Enable input affect the A and B ports?

When the Output Enable input is HIGH, it disables both A and B ports by placing them in a HIGH Z state.

What determines the direction of data flow in the transceiver?

The Transmit/Receive (T/R) input determines the direction; Transmit (active HIGH) enables data from A Ports to B Ports, while Receive (active LOW) enables data from B Ports to A Ports.