PI74FCT245TQE

Buffers, Drivers, Receivers, Transceivers Overview

The PI74FCT245TQE is an octal bidirectional transceiver manufactured by Diodes Incorporated, utilizing Fast CMOS technology. It operates within a supply voltage range of 4.75 V to 5.25 V and supports an industrial temperature range from -40°C to +85°C. The device features TTL-compatible input and output levels with three-state outputs. Key electrical parameters include a propagation delay (tPLH/tPHL) of up to 7.0 ns at a load capacitance of 50 pF, a maximum quiescent current of 500 µA, and an output low current capability of 64 mA. It is housed in a 20-pin QSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous two-way communication between data buses via a transmit/receive direction control input.
• Features extremely low static power consumption and hysteresis on all inputs for noise immunity.
• Delivers low ground bounce outputs to maintain signal integrity during switching.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Memory drivers
• Address drivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'Q' corresponds to the 20-pin QSOP package configuration required for your design. Confirm that the component meets the necessary RoHS compliance standards for your region, as datasheet specifications may vary regarding lead content depending on the manufacturing batch and date code. Ensure the active LOW output enable logic aligns with your system's control signals.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high-speed bidirectional data transfer is required with low power dissipation. The FCT logic family offers pin compatibility with bipolar FAST series devices while providing superior speed and lower power. Consider the 3-state output capability for bus sharing applications and verify that the TTL input thresholds match the driving source logic levels.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the PI74FCT245T/2245T family of Fast CMOS Octal Bidirectional Transceivers. While the PI74FCT2245T variant includes built-in 25-ohm series resistors to reduce reflections, the standard PI74FCT245T does not. Both share identical pinouts and functional characteristics, differing primarily in internal output impedance design for noise reduction.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

PI74FCT245TS

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the OE input?

The Output Enable (OE) input is active LOW. When HIGH, it disables both A and B ports by placing them in a High-Z state.

How is the data direction controlled?

Data flow is determined by the Transmit/Receive (T/R) input. An active HIGH T/R enables data from A ports to B ports, while an active LOW T/R enables data from B ports to A ports.