SN74ALS245ADWG4

Overview

The SN74ALS245ADWG4 is an octal bus transceiver from the Texas Instruments SN74ALS series, housed in a 20-pin SOIC package. It operates on a supply voltage range of 4.5 V to 5.5 V with a propagation delay of 15 ns. The device features bidirectional data flow controlled by a direction pin and supports low-level output currents of 24 mA and high-level output currents of -8 mA. It functions within a temperature range of 0°C to +70°C.

Feature Summary

• Octal non-inverting bus transceiver architecture
• Bidirectional data transfer capability
• 3-state outputs for bus isolation

Applications

• Memory block transfers
• Bus-oriented communications
• Driving capacitive loads

Procurement Notes

Verify the specific suffix 'DWG4' against the manufacturer's current datasheet to confirm RoHS compliance and lead-free status. Ensure the SOIC-20 package dimensions match your PCB footprint requirements. Confirm that the operating temperature range of 0°C to +70°C meets your system's environmental specifications before finalizing procurement.

Selection Notes

Select this component when designing systems requiring 8-bit wide data paths at standard logic speeds. It serves as a direct replacement for older LS-series devices where higher speed is needed but CMOS power consumption is not critical. Verify input compatibility with TTL or CMOS logic levels used in the source circuitry.

Part Context

This part belongs to the SN74ALS (Advanced Low-power Schottky) family, known for faster switching than standard LS logic. The 'A' variant often denotes improved characteristics over the base model. The 'G4' suffix typically indicates Green/RoHS-compliant manufacturing. It is distinct from LVC or ACT variants which operate at different voltage levels.

Replacement Considerations

SN74ALS245DW

FAQ

What is the maximum output current capability?

The device supports a low-level output current of 24 mA and a high-level output current of -8 mA.

Is the data flow unidirectional or bidirectional?

The SN74ALS245ADWG4 supports bidirectional data flow, controlled by the direction input pin.