SN74ALS245A-1DWRG4

Overview

The SN74ALS245A-1DWRG4 is an octal bus transceiver from Texas Instruments, utilizing Advanced Low-Power Schottky (ALS) logic. It features eight non-inverting data channels with three-state outputs, designed for high-speed bidirectional data transfer between buses. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input and output levels. Key electrical specifications include a propagation delay of 10 ns, a low-level output current of 24 mA, and a high-level output current of -15 mA. It is housed in a 20-SOIC package and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Octal bus transceiver architecture providing eight independent non-inverting data channels for efficient bidirectional communication.
• Advanced Low-Power Schottky (ALS) technology ensures high switching speeds while maintaining reduced power consumption compared to standard LS logic.
• Three-state outputs allow direct connection to system buses without additional drivers, facilitating multiple source or sink devices on the same line.
• TTL-compatible input and output levels simplify interface design with other digital logic components.

Applications

• High-speed data transmission systems requiring bidirectional bus arbitration
• Memory modules and storage interfaces utilizing parallel data paths
• Industrial control systems needing robust signal integrity over short distances
• Computing peripherals connecting microprocessors to peripheral chips

Procurement Notes

Verify the specific suffix 'RG4' indicates RoHS compliance and green manufacturing status as per Texas Instruments documentation. Confirm the 'A' variant designation aligns with the required ALS performance characteristics. Ensure the SOIC-20 package dimensions match your PCB footprint requirements. Check that the operating temperature range meets your environmental constraints. Validate the datasheet version to ensure all electrical parameters are current.

Selection Notes

Select this component when high-speed bidirectional data transfer is required with TTL compatibility. The ALS series offers a balance of speed and power efficiency suitable for complex digital systems. Consider the 24 mA low-level output current for driving moderate loads directly. Evaluate the 10 ns propagation delay against your system timing requirements. Ensure the 4.5 V to 5.5 V supply voltage matches your existing power rails.

Part Context

This part belongs to the SN74ALS245 family of octal bus transceivers. It serves as a critical interface component in digital electronics, enabling data flow between different bus segments. The ALS technology represents an evolution in Schottky logic, offering improved performance over earlier generations. It is widely used in applications demanding reliable, high-frequency data transmission with minimal signal distortion.

Replacement Considerations

The SN74ALS245ADWRG4 is a compatible alternative within the same product family. Verify pinout compatibility before substitution. Ensure the replacement maintains the same ALS logic characteristics and package type. Confirm that the substitute part meets the same electrical specifications and operating temperature range.

FAQ

What is the maximum propagation delay for the SN74ALS245A-1DWRG4?

The maximum propagation delay is 10 ns, ensuring fast data transmission capabilities.

Does the SN74ALS245A-1DWRG4 support bidirectional data transfer?

Yes, it is an octal bus transceiver designed specifically for bidirectional data transfer between two buses.

What logic family does the SN74ALS245A-1DWRG4 belong to?

It belongs to the Advanced Low-Power Schottky (ALS) logic family, known for its high speed and low power consumption.