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Product Detailed Parameters
- Description：GP51-04001-99,99/04/07 (M-PCC)
- Series：*
- Mfr：Texas Instruments
- Package：Bulk,Tube
- Logic Type：-
- Number of Circuits：-
- Number of Inputs：-
- Features：-
- Voltage - Supply：-
- Current - Quiescent (Max)：-
- Current - Output High, Low：-
- Input Logic Level - Low：-
- Input Logic Level - High：-
- Max Propagation Delay @ V, Max CL：-
- Operating Temperature：-
- Mounting Type：-
- Supplier Device Package：-
- Package / Case：-
- Grade：-
- Qualification：-
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Overview
The SN74AS21NS is a high-speed Schottky logic component manufactured by Texas Instruments, belonging to the AS series. It functions as a dual four-input positive AND gate housed in a 14-pin PDIP package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports through-hole mounting. Key electrical characteristics include a propagation delay of 10 ns, a low-level output current capability of 20 mA, and a high-level output current of -2 mA. It is designed for commercial temperature environments ranging from 0°C to +70°C.
Feature Summary
- Dual four-input positive AND logic functionality
- High-speed operation with 10 ns propagation delay
- Robust TTL-compatible input and output drive capabilities
Applications
- Digital logic circuit design requiring fast switching speeds
- Data processing systems utilizing standard TTL interfaces
- Industrial control applications operating within commercial temperature ranges
Procurement Notes
Verify the specific manufacturer part number against official Texas Instruments documentation to ensure authenticity. Confirm that the PDIP-14 package matches your board layout requirements. Check RoHS compliance status via the manufacturer's datasheet before finalizing procurement decisions.
Selection Notes
Select this component when high-speed AND gating is required alongside standard TTL compatibility. The AS series offers superior speed compared to standard 74LS devices while maintaining similar pinouts. Ensure the PCB footprint accommodates the 14-pin DIP configuration and verify power supply stability within the specified voltage limits.
Part Context
This component is part of the Texas Instruments SN74AS family, which represents high-speed Schottky technology. The AS series was engineered to provide faster switching speeds than previous generations while maintaining power efficiency suitable for dense digital logic applications. It serves as a specialized building block for complex combinational logic circuits.
Replacement Considerations
Compatible substitutes include the SN74S21N for standard Schottky performance or the SN74LS21N for lower power consumption at reduced speeds. Verify pinout compatibility and electrical specifications before implementing any cross-series replacement.
