74ACT11245NT

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ACT11245NT is an octal bus transceiver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features TTL-compatible inputs and utilizes the EPIC (Enhanced-Performance Implanted CMOS) process. Key electrical characteristics include a maximum propagation delay of 9.2 ns, high-level output current of -24 mA, and low-level output current of 24 mA. It employs a flow-through architecture and center-pin VCC/GND configurations to optimize PCB layout and minimize switching noise.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous two-way communication between data buses via A-to-B or B-to-A transmission controlled by the DIR input.
• Features TTL-voltage compatible inputs for direct interfacing with standard logic systems.
• Incorporates a flow-through architecture designed to optimize printed circuit board layout efficiency.
• Utilizes center-pin VCC and GND configurations to minimize high-speed switching noise.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus line driving applications requiring isolation control
• High-speed digital signal routing in industrial environments

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package type and manufacturer status before procurement, as the NT variant may have different availability compared to surface-mount options like DWR or PWR. Confirm RoHS compliance and lead finish specifications against project requirements. Ensure the design accounts for the absolute maximum ratings, particularly regarding power dissipation limits in the PDIP package. Cross-reference the latest datasheet revision to confirm pinout consistency and recommended operating conditions.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal bidirectional bus transceiver with TTL-compatible inputs is required. The 3-state outputs allow direct connection to bus lines while maintaining isolation when disabled. Consider the flow-through architecture for simplified PCB routing. Verify that the operating voltage range of 4.5 V to 5.5 V aligns with the system power supply. Evaluate the propagation delay specifications against the target data rate requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

The 74ACT11245 belongs to the 74ACT logic family, which combines the speed of bipolar circuits with the low power consumption of CMOS technology. This specific part is an octal bus transceiver, distinct from unidirectional buffers or single-bit transceivers. The NT suffix denotes a standard plastic dual-in-line package, suitable for through-hole mounting. It is part of a broader series including variants with different packaging options such as SOIC and TSSOP.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: 74ACT11245DWR, 74ACT11245PWR, 74ACT11245DBR.

Buffers, Drivers, Receivers, Transceivers FAQ

How is the direction of data transmission controlled?

Data transmission direction is controlled by the logic level at the DIR input. A low level directs data from the B bus to the A bus, while a high level directs data from the A bus to the B bus.

What is the function of the OE input?

The output-enable (OE) input disables the device when set to a high logic level, effectively isolating the buses from each other regardless of the DIR input state.

Are the inputs compatible with TTL voltage levels?

Yes, the inputs are explicitly designed to be TTL-voltage compatible, allowing direct interfacing with TTL logic families without additional level shifting.