SN74LS21MEL

Inverter Gates Overview

The SN74LS21MEL is a dual 4-input positive-AND gate manufactured by onsemi, belonging to the LS (Low-power Schottky) logic family. It features two independent AND gates within a single package. The device operates with a supply voltage range of 4.75V to 5.25V and supports propagation delays of approximately 20 ns. It is designed for through-hole mounting in a 14-pin plastic DIP package and functions reliably across an operating temperature range of 0°C to 70°C.

Inverter Gates Feature Summary

• Contains two independent 4-input AND gates
• Utilizes Low-power Schottky (LS) technology for high speed and low power consumption
• Provides standard TTL-compatible inputs and outputs

Inverter Gates Applications

• Digital logic circuit design
• Data encoding systems
• Control logic implementation

Inverter Gates Procurement Notes

Verify that the specific SN74LS21MEL part number matches the required lead-free or military-grade specifications if applicable, as suffixes often denote environmental compliance or extended temperature ranges. Confirm the manufacturer origin is onsemi and ensure the package type corresponds to your PCB footprint requirements before finalizing procurement orders.

Inverter Gates Selection Notes

Select this component when a dual 4-input AND function is required within a standard TTL logic environment. It serves as a direct replacement for other SN74LS21 variants from different manufacturers, provided pin compatibility and electrical characteristics align with the system design constraints.

Inverter Gates Part Context

This component belongs to the widely used 74LS series of digital logic integrated circuits. The 'SN' prefix typically indicates Texas Instruments manufacturing standards, while 'onsemi' denotes the current supplier. The 'MEL' suffix likely specifies a specific package variant or environmental certification distinct from the standard SN74LS21N.

Inverter Gates Replacement Considerations

Direct substitutes include SN74LS21N, SN74LS21DR, and SN74LS21NE4. These parts share identical logical functionality and pinouts, allowing for drop-in replacements in most standard applications without circuit modification.