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74LS21PC is listed in the Inverter Gates range at ChipApex. The manufacturer field lists Fairchild Semiconductor. Its product description is IC GATE AND 14DIP. Review the specifications below when checking this part for your BOM.
Inverter Gates specifications for 74LS21PC
- Description：IC GATE AND 14DIP
- Series：*
- Mfr：Fairchild Semiconductor
- Package：Bulk
- 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：-
Inverter Gates datasheet and documents for 74LS21PC
Inverter Gates Overview
The Fairchild Semiconductor 74LS21PC is a dual 4-input positive-AND gate integrated circuit belonging to the 74LS logic family. It operates within a supply voltage range of 4.75V to 5.25V and features two independent AND gates, each with four inputs. The device utilizes a 14-pin DIP package for through-hole mounting. Key electrical characteristics include a propagation delay of 20ns, an output current capability of 8mA, and a static current of 2.20mA. It is characterized for operation over a temperature range of 0°C to 70°C.
Inverter Gates Feature Summary
- Contains two independent 4-input AND gates for complex logic implementation
- Compatible with standard TTL logic families for seamless integration
- Provides high noise immunity and reliable switching performance
Inverter Gates Applications
- Digital logic circuits requiring multi-input AND operations
- Microprocessor-based system address decoding
- Control logic in industrial automation equipment
Inverter Gates Procurement Notes
Verify the specific manufacturer marking on the component body to confirm Fairchild Semiconductor origin, as this part number is also produced by other vendors under the same JEDEC designation. Ensure the package matches the required PCB footprint and that the operating temperature range meets the application's environmental specifications before finalizing procurement.
Inverter Gates Selection Notes
Select this component when a dual 4-input AND function is required within a standard 74LS logic environment. It serves as a direct replacement for equivalent parts from National Semiconductor or Motorola. Consider the 14-pin DIP form factor for prototyping or legacy board designs where surface-mount alternatives are not suitable.
Inverter Gates Part Context
The 74LS21 is a fundamental component in the Low-power Schottky (LS) logic series, widely used in digital electronics. As a dual 4-input AND gate, it allows designers to implement complex boolean functions using fewer chips compared to lower-input-count gates. Its robustness and compatibility make it a staple in educational kits and industrial control systems.
Inverter Gates Replacement Considerations
Equivalent parts include SN74LS21N (Texas Instruments), MC74LS21P (ON Semiconductor), and HD74LS21P (Renesas). Verify pinout compatibility and ensure the substitute part supports the required 4.75V to 5.25V supply voltage range.
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