SN74ALS244CDBRG4

Overview

The SN74ALS244CDBRG4 is an octal buffer and line driver featuring three-state outputs, manufactured by Texas Instruments. It belongs to the ALS (Advanced Low-power Schottky) logic series, utilizing bipolar technology for high-speed performance. The device is housed in a 20-pin SOIC package designed for surface-mount installation. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a commercial temperature range from 0°C to +70°C. Key electrical characteristics include a propagation delay of 16 ns and low-level output current capability of 8 mA.

Feature Summary

• Provides eight independent buffering or driving channels with three-state output control for bus-oriented memory and clock drivers.
• Utilizes Advanced Low-power Schottky (ALS) bipolar technology to achieve high switching speeds while maintaining reduced power consumption compared to standard LS logic.
• Features separate output enable inputs to manage data flow direction and isolate bus lines during inactive periods.

Applications

• Memory map control circuits requiring signal buffering between address buses and memory modules.
• Clock distribution networks where signal integrity and drive strength are critical for timing synchronization.
• Bus-oriented architectures necessitating isolation and controlled data transfer between digital subsystems.

Procurement Notes

Verify the complete part number including the 'C' grade suffix and 'G4' environmental compliance code against official Texas Instruments documentation. Confirm that the specific variant matches the required operating temperature range and package type for your design. Ensure compatibility with existing board layouts regarding the SOIC-20 footprint and pin configuration before finalizing procurement decisions.

Selection Notes

Select this component when system requirements demand the speed advantages of ALS logic over standard LS families without exceeding power budgets. The three-state outputs make it suitable for multiplexed bus systems. Consider the SOIC-20 package constraints and verify that the 5V supply rail aligns with the rest of the circuitry. Evaluate thermal dissipation needs based on the load capacitance and switching frequency expected in the application.

Part Context

This component is part of the broader SN74xx logic family, specifically the ALS sub-family known for balancing speed and power efficiency. It serves as a digital interface solution for managing multiple signal lines simultaneously. The 'C' designation indicates commercial grade operation, distinguishing it from military or extended temperature variants within the same logical architecture.

Replacement Considerations

Compatible substitutes include the SN74ALS244CD and SN74ALS244DR. Verify pinout compatibility and electrical specifications such as propagation delay and output drive current before substitution. Ensure that any replacement maintains the three-state functionality and ALS logic characteristics required by the original design.