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Product Detailed Parameters
- Description：IC GATE NAND 4CH 2-INP 14-SOIC
- Series：74F
- Mfr：Texas Instruments
- Package：Tube
- Logic Type：NAND Gate
- Number of Circuits：4
- Number of Inputs：2
- Features：Open Collector
- Voltage - Supply：4.5V ~ 5.5V
- Current - Quiescent (Max)：-
- Current - Output High, Low：-, 64mA
- Input Logic Level - Low：0.8V
- Input Logic Level - High：2V
- Max Propagation Delay @ V, Max CL：12.5ns @ 5V, 50pF
- 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 SN74F38DE4 is a quad 2-input NAND buffer gate with open-collector outputs belonging to the Texas Instruments SN74F series. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature from 0°C to 70°C. The device features a maximum propagation delay of 13ns at 5V with a 50pF load, a low-level output current capability of up to 64mA, and a high-level output leakage current of 250µA.
Feature Summary
- Contains four independent 2-input NAND gates with open-collector outputs requiring external pull-up resistors for proper operation.
- Capable of implementing active-low wired-OR or active-high wired-AND functions when connected to other open-collector outputs.
- Designed to generate higher output voltage levels by utilizing the open-collector architecture.
Applications
- Implementing active-low wired-OR logic configurations
- Creating active-high wired-AND logic structures
- Generating higher output voltage levels in digital circuits
Procurement Notes
Verify that the ordering suffix 'E4' corresponds to the specific package variant required, as standard datasheets may list generic part numbers like SN74F38DR. Confirm RoHS compliance status and lead finish specifications directly with the manufacturer or authorized distributors, as these attributes are critical for assembly compatibility and regulatory adherence.
Selection Notes
Select this component when designing circuits that require multiple independent NAND operations combined with the flexibility of open-collector outputs. Ensure the design includes appropriate external pull-up resistors to define the high state voltage level. Verify that the system's power supply remains strictly within the 4.5V to 5.5V range to maintain electrical characteristics and prevent damage.
Part Context
This device belongs to the SN74F series, which represents a fast logic family known for high-speed performance compared to standard TTL. The SN74F38 specifically provides quad NAND functionality with open-collector outputs, distinguishing it from push-pull output variants. It serves as a fundamental building block for complex digital logic designs requiring flexible output interfacing.
Replacement Considerations
SN74F38DR
FAQ
Why are external pull-up resistors necessary for this device?
The SN74F38DE4 features open-collector outputs, meaning it can only actively pull the output line to ground (low state). External pull-up resistors are required to provide the path to VCC for the high state, enabling correct logical operation.
What is the maximum low-level output current?
The device can sink a low-level output current of up to 64mA under recommended operating conditions.
