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Product Detailed Parameters
- Description：IC GATE NOR 4CH 2-INP 14-SO
- 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 SN74128NS is a quad 2-input NOR gate with open-collector outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range of 0°C to 70°C. The component utilizes a 14-pin Small Outline Package (SOP) with surface-mount technology. It belongs to the standard 74-series logic family and features bipolar transistor-transistor logic architecture.
Feature Summary
- Provides four independent 2-input NOR logic functions
- Features open-collector output configuration for flexible interfacing
- Designed for surface-mount assembly on printed circuit boards
Applications
- General-purpose digital logic processing
- Signal gating and switching applications
- Industrial control system interfaces
Procurement Notes
Verify that the specific orderable part number matches the required SOP package variant. Confirm RoHS compliance status and lead finish specifications against project requirements. Ensure the selected device meets the necessary operating temperature range for the intended application environment before finalizing procurement.
Selection Notes
Select this component when a quad NOR gate with open-collector outputs is required in a surface-mount form factor. Consider the 74-series compatibility for standard logic level interfacing. Evaluate the 14-pin footprint constraints and ensure adequate thermal management within the specified commercial temperature range during design integration.
Part Context
This device is part of the broader SN74128 logic family, which includes various packaging options such as SOIC, PDIP, and ceramic dual in-line packages. The NS suffix specifically denotes the small outline package variant suitable for automated surface-mount assembly processes. Other variants exist for through-hole or military-grade applications.
Replacement Considerations
SN74128D
FAQ
What type of output stage does the SN74128NS utilize?
The SN74128NS utilizes an open-collector output stage, requiring external pull-up resistors for proper high-level signal generation.
Is the SN74128NS available in a hermetically sealed package?
No, the SN74128NS uses a plastic small outline package. Hermetically sealed ceramic options are available under different part numbers such as SN54128J.
