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Product Detailed Parameters
- Description：IC GATE NOR
- Series：*
- Mfr：Texas Instruments
- 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：-
- Grade：-
- Qualification：-
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Overview
The SN74AS1805N is a high-speed Schottky TTL logic component manufactured by Texas Instruments. It contains six independent NOR gates within a single package. The device operates with a supply voltage range of 4.5 V to 5.5 V and supports a commercial temperature range from 0°C to +70°C. Key electrical characteristics include a propagation delay of 4.3 ns at 5.5 V with a 50 pF load, and a low-level output voltage between 350 mV and 500 mV. It utilizes a 20-pin DIP package for through-hole mounting.
Feature Summary
- Provides six independent NOR logic functions in a single integrated circuit
- Utilizes high-speed Schottky (AS) technology for rapid signal processing
- Compatible with standard TTL input and output voltage levels
Applications
- Digital logic circuits requiring multiple NOR operations
- High-speed data processing systems
- TTL-based control logic interfaces
Procurement Notes
Verify the specific manufacturer source and authenticity when sourcing this component, as availability may vary. Confirm that the package type matches the required 20-pin DIP form factor for your PCB layout. Ensure the operating temperature range meets your environmental specifications. Check for any recent product lifecycle notices or obsolescence warnings from Texas Instruments before finalizing procurement plans.
Selection Notes
Select this component when designing circuits that require multiple NOR gates with high switching speeds. The AS series offers faster performance than standard 74S series devices. Ensure the design accommodates the 20-pin DIP footprint and through-hole assembly process. Verify that the system power supply remains stable within the 4.5 V to 5.5 V range to maintain specified electrical characteristics.
Part Context
This part belongs to the Texas Instruments SN74AS family, which represents high-speed Schottky TTL logic. The AS series was designed to provide improved speed-performance-power product compared to earlier S series devices. The SN74AS1805N specifically integrates six NOR gates, offering a compact solution for complex logic implementations in digital systems.
Replacement Considerations
Direct pin-compatible replacements within the same family include other SN74AS series NOR gate variants. Cross-family replacements such as SN74LS1805N offer slower speeds but similar functionality. Verify logical equivalence and electrical compatibility before substituting.
