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Product Detailed Parameters
- Description：IC GATE NAND 4CH 2-INP 14SOIC
- Series：7400
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Logic Type：NAND Gate
- Number of Circuits：4
- Number of Inputs：2
- Features：Open Collector
- Voltage - Supply：4.75V ~ 5.25V
- Current - Quiescent (Max)：8.5 mA
- Current - Output High, Low：-, 48mA
- Input Logic Level - Low：0.8V
- Input Logic Level - High：2V
- Max Propagation Delay @ V, Max CL：22ns @ 5V, 45pF
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Supplier Device Package：14-SOIC
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Grade：-
- Qualification：-
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Overview
The SN7438DR is a quad 2-input NAND gate integrated circuit manufactured by Texas Instruments. It belongs to the standard 7400 logic series and features open-collector outputs. The device operates within a supply voltage range of 4.75 V to 5.25 V. It exhibits a maximum propagation delay of 22 ns at 5 V with a 45 pF load. The component supports surface mount installation in a 14-SOIC package and functions reliably across an operating temperature range of 0°C to 70°C.
Feature Summary
- Contains four independent 2-input NAND logic gates within a single package.
- Outputs are configured as open-collector, allowing for wired-AND connections and flexible voltage level interfacing.
- Designed for high-speed digital switching applications within the standard 7400 logic family.
Applications
- Digital logic circuits requiring NAND functionality
- Open-collector bus systems utilizing wired-AND configurations
- General-purpose switching and signal processing
Procurement Notes
Verify the specific manufacturer part number against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure that the open-collector output configuration aligns with the target circuit design requirements, particularly regarding external pull-up resistor needs. Confirm RoHS compliance status through current datasheets before finalizing procurement decisions.
Selection Notes
Select this component when a quad NAND gate with open-collector outputs is required for standard 5V logic applications. The SN7438DR is suitable for designs needing higher drive capability or voltage translation capabilities inherent to open-collector structures. Consider the 14-SOIC package dimensions for PCB layout constraints and ensure the operating environment remains within the specified commercial temperature limits.
Part Context
This component is part of the widely adopted SN7400 series of logic integrated circuits. The 'AS' suffix in similar parts often denotes advanced Schottky technology, but this specific variant represents the standard 7400 series performance. It serves as a fundamental building block for complex digital systems, providing reliable logical inversion and combination functions in industrial and consumer electronics.
Replacement Considerations
Compatible substitutes include SN74LS38DR and SN74F38DR. Verify that alternative packages maintain identical pin assignments and that electrical characteristics such as propagation delay and output current meet the original design specifications.
