74AC245MTR

Buffers, Drivers, Receivers, Transceivers Overview

The STMicroelectronics 74AC245MTR is an octal bidirectional bus transceiver with three-state outputs, fabricated using advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 2V to 6V. The device features high-speed performance with a typical propagation delay of 4.5ns at VCC = 5V. It provides symmetrical output impedance with minimum source/sink currents of 24mA. Quiescent supply current is maximized at 80μA across the extended temperature range. The component supports 50Ω transmission line driving capability and includes protection circuits against static discharge.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bidirectional data path controlled by a directional input for asynchronous communication between buses.
• Three-state outputs allow effective isolation of buses when the enable input disables the device.
• High noise immunity with defined minimum noise voltage levels relative to the supply voltage.
• Balanced propagation delays ensure symmetrical timing characteristics for reliable data transfer.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented applications requiring two-way asynchronous communication
• Driving 50Ω transmission lines in high-speed digital systems
• Interfacing data buses with microprocessors or memory modules

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the ordering suffix MTR corresponds to the tape and reel packaging format specified in the official datasheet. Confirm the manufacturer designation as STMicroelectronics for this specific part number. Ensure compliance with RoHS directives if required by your application standards. Check for any obsolete status notifications from the manufacturer regarding this component series before finalizing procurement plans.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring octal width and bidirectional control. The AC logic family offers higher speed compared to standard 74LS series while maintaining CMOS low power dissipation. Verify that the operating voltage range of 2V to 6V matches the system power rails. Consider the TSSOP-20 package dimensions for PCB layout constraints if selecting the surface mount variant associated with this suffix.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the 74AC logic family, which utilizes advanced CMOS technology for improved speed and lower power consumption. It is functionally compatible with the 74 series 244 but offers enhanced performance characteristics. The octal configuration allows for efficient management of wide data buses in complex digital architectures.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for direct pin-compatible alternatives such as the 74AC245 in different packaging options like DIP or SOP. Verify electrical specifications match if substituting with parts from other manufacturers offering equivalent AC series transceivers.

Buffers, Drivers, Receivers, Transceivers FAQ

What determines the direction of data transmission in the 74AC245MTR?

The direction of data transmission is determined by the DIR (Directional Control) input pin.

How does the device handle static discharge?

All inputs and outputs are equipped with protection circuits providing 2kV ESD immunity against static discharge and transient excess voltage.

What is the maximum quiescent supply current at elevated temperatures?

The maximum quiescent supply current is 80μA at temperatures ranging from -55°C to +125°C.