M74HCT245RM13TR

Overview

The M74HCT245RM13TR is an octal bus transceiver with 3-state outputs manufactured by STMicroelectronics. It utilizes silicon gate C2MOS technology and operates within a supply voltage range of 4.5V to 5.5V. The device features symmetrical output impedance with minimum drive currents of 6mA for both high and low states. Propagation delay is typically 13ns at 4.5V, with balanced tPLH and tPHL characteristics. Inputs are TTL-compatible, requiring a minimum high-level input voltage of 2.0V and a maximum low-level input voltage of 0.8V. Quiescent supply current is maximized at 4μA at 25°C.

Feature Summary

• Provides two-way asynchronous communication between data buses via directional control inputs.
• Features three-state outputs that allow effective isolation of buses when the enable input is deactivated.
• Includes protection circuits against static discharge and transient excess voltage on all inputs.

Applications

• Two-way asynchronous communication between data buses
• Bus-oriented communications systems
• Memory and memory mapping

Procurement Notes

Verify the specific package type (SO-20) and tape-and-reel orientation against the official datasheet before procurement. Confirm that the operating environment remains within the recommended supply voltage limits of 4.5V to 5.5V. Ensure that floating bus terminals are held HIGH or LOW during High Z states to prevent undefined logic levels. Check for RoHS compliance status in the latest manufacturer documentation.

Selection Notes

Select this component when designing systems requiring octal bidirectional data transfer with defined directionality. It is suitable for applications needing TTL-compatible input thresholds while maintaining CMOS low power dissipation. Consider the propagation delay specifications relative to system clock speeds. Verify that the SO-20 surface mount package fits the available PCB real estate constraints.

Part Context

This part belongs to the M74HCT245 series of octal bus transceivers. It is functionally compatible with the standard 74 Series 245 devices but fabricated using advanced high-speed CMOS technology. The RM13TR suffix indicates the specific SOP/SOIC-20 packaging and tape-and-reel delivery format provided by STMicroelectronics.

Replacement Considerations

Check for pin-compatible alternatives from other manufacturers that meet the 4.5V to 5.5V operating range and 6mA drive current requirements. Verify that any substitute maintains the same 3-state output functionality and TTL input compatibility.