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Product Detailed Parameters
- Description：IC DUAL MARKED
- Mfr：Rochester Electronics, LLC
- Package：Bulk
- Series：*
- Type：-
- Protocol：-
- Number of Drivers/Receivers：-
- Duplex：-
- Data Rate：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Receiver Hysteresis：-
- Grade：-
- Qualification：-
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Overview
The SN74LS21NE4 is a dual 4-input AND gate manufactured by Rochester Electronics. It operates within the LS TTL series and features a PDIP-14 plastic package with 14 terminals. The device supports a propagation delay of 20 ns and functions across a commercial temperature range of 0°C to 70°C. It contains two independent logic circuits, each providing four inputs for positive-AND operations.
Feature Summary
- Contains two independent 4-input AND gates
- Operates on LS TTL technology
- Available in standard DIP-14 packaging
Applications
- Digital logic circuit design
- Signal processing systems
- Industrial control interfaces
Procurement Notes
Verify component authenticity through official manufacturer documentation or authorized distributor channels. Confirm that the part number matches the specific LS series designation and package type. Ensure compliance with relevant environmental standards such as RoHS if required for the application. Request test reports or datasheets to validate performance parameters before integration into production systems.
Selection Notes
Select this component when a dual 4-input AND function is required in a DIP-14 package. Consider the LS TTL speed and power characteristics relative to system requirements. Verify that the commercial temperature range meets operational needs. Check compatibility with existing logic families and voltage levels in the target circuit design.
Part Context
Rochester Electronics specializes in sustaining legacy semiconductor products. This component belongs to the broader 74LS logic family, which is widely used in industrial and commercial applications. The company ensures continued availability of these parts through licensed manufacturing and testing processes, supporting long-term product lifecycles.
Replacement Considerations
Compatible substitutes include other manufacturers' SN74LS21 variants in DIP-14 packages. Verify pinout compatibility and electrical specifications before substitution. Ensure that any replacement part meets the same LS TTL performance standards and operating temperature ranges.
