SN74AS756DWE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS756DWE4 is an octal buffer and line driver from the Texas Instruments AS logic series, housed in a 20-pin SOIC (DW) package. It features open-collector outputs designed to drive bus lines or memory address registers while eliminating the need for 3-state overlap protection. The device operates on a supply voltage (VCC) ranging from 4.5 V to 5.5 V. Key electrical parameters include a low-level output current (IOL) of up to 64 mA and a propagation delay (tPLH/tPHL) between inputs and outputs ranging from 1 ns to 20 ns under standard load conditions (CL = 50 pF). It is characterized for operation within an ambient temperature range of 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Open-collector outputs capable of driving bus lines or buffering memory address registers without requiring external 3-state overlap protection circuitry.
• PNP input structure that reduces DC loading on preceding drivers compared to standard TTL inputs.
• High fan-out and improved fan-in characteristics suitable for high-density digital designs.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus-oriented receivers and transmitters

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'E4' corresponds to lead-free/RoHS compliance requirements for your assembly process. Confirm the package type is SOIC-20 (DW) as indicated by the part number. Ensure the design supports open-collector output configurations, as this device lacks internal pull-up resistors. Check that the operating environment stays within the 0°C to 70°C commercial temperature range specified for the SN74AS variant.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems that require high-current sinking capability (up to 64 mA) for bus interfacing. It is appropriate for applications needing to eliminate complex 3-state control logic for overlap protection. Consider the AS logic family speed and power consumption profile relative to HC or HCT alternatives if lower power or different voltage levels are required.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74AS (Advanced Schottky) logic family, known for high speed. It is functionally related to the SN74AS757, which offers non-inverting outputs, whereas the SN74AS756 provides inverting outputs. Both share similar pinouts and electrical characteristics but differ in logical polarity.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

• SN74AS757DW

Buffers, Drivers, Receivers, Transceivers FAQ

Does the SN74AS756DWE4 have internal pull-up resistors?

No, the SN74AS756DWE4 features open-collector outputs. External pull-up resistors are required to establish a high logic state.

What is the maximum low-level output current?

The maximum low-level output current (IOL) is 64 mA at VCC = 4.5 V.