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DM74AS244WM
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Product Detailed Parameters
- Description：IC BUFFER NON-INVERT 5.5V 20SOIC
- Series：74AS
- Mfr：Fairchild Semiconductor
- Package：Tube
- Logic Type：Buffer, Non-Inverting
- Number of Elements：2
- Number of Bits per Element：4
- Input Type：-
- Output Type：3-State
- Current - Output High, Low：15mA, 64mA
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
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Overview
The DM74AS244WM is an octal 3-STATE bus driver/receiver from the Advance Schottky family, manufactured by Fairchild Semiconductor. It features eight non-inverting buffers organized with four buffers sharing a common 3-STATE enable gate. The device operates within a supply voltage range of 4.5V to 5.5V and utilizes an advanced oxide-isolated, ion-implanted Schottky TTL process. It is housed in a 20-pin Wide Small Outline (SOIC) package, designated by package number M20B.
Feature Summary
- Advanced oxide-isolated, ion-implanted Schottky TTL process for improved switching performance
- Low output impedance capable of driving terminated transmission lines down to 133Ω
- High input impedance to prevent significant loading of transmission lines
- Functional and pin compatible with 74LS and standard Schottky counterparts
Applications
- Memory systems
- Microprocessor systems
- Communication systems
Procurement Notes
Verify the specific suffix 'WM' corresponds to the SOIC-20 package (M20B) as documented in official Fairchild datasheets. Confirm that the component meets the required operating temperature specifications and electrical characteristics defined in the original product documentation before integration into designs.
Selection Notes
Select this component when bidirectional or unidirectional buffer interfaces are required in memory or microprocessor architectures. It serves as a suitable replacement for legacy 74LS and Schottky devices where lower power dissipation and faster switching speeds are necessary while maintaining pin compatibility.
Part Context
This part belongs to the DM74AS series of Advance Schottky logic circuits. The DM74AS244 specifically provides octal buffering capabilities with 3-STATE outputs. It is distinct from the DM74AS240, which offers inverting functionality, and shares the same package and process technology within the AS family.
Replacement Considerations
The DM74AS244N is a verified pin-compatible alternative offered in a 20-pin DIP package (N20A). Both variants share identical functional characteristics and belong to the same Advance Schottky family.
