SN74F27NSR

Overview

The SN74F27NSR is a triple 3-input positive NOR gate manufactured by Texas Instruments. It belongs to the SN74F logic series and utilizes bipolar technology. The device is housed in a 14-pin SOIC surface-mount package. It operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 5 ns at 5 V, a low-level output current of 48 mA, and a high-level output current of -15 mA. The component supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Provides three independent 3-input NOR logic functions
• Features high-speed switching capabilities with 5 ns propagation delay
• Offers strong output drive capability for bus driving applications

Applications

• General-purpose digital logic circuits
• Bus-oriented systems requiring NOR functionality
• Industrial control logic interfaces

Procurement Notes

Verify the specific suffix 'NSR' corresponds to the SOIC-14 package and tape-and-reel delivery format as documented in the official datasheet. Confirm that the manufacturer designation remains Texas Instruments, as sourcing channels may vary. Ensure compliance with RoHS directives by checking the detailed environmental documentation provided by the supplier. Cross-reference the ordering part number against the manufacturer's latest release notes to confirm availability status.

Selection Notes

Select this component when a triple 3-input NOR function is required in a compact surface-mount form factor. The SN74F series offers faster performance compared to standard 74LS equivalents but consumes more power. Consider the 14-pin SOIC footprint for PCB layout compatibility. Evaluate the 48 mA sink current capacity against load requirements to ensure signal integrity without external buffering.

Part Context

This device is part of the Texas Instruments SN74F family of high-speed CMOS-compatible logic gates. The F series is designed for applications demanding faster switching speeds than standard TTL logic while maintaining pinout compatibility with legacy designs. The SN74F27 specifically integrates three NOR gates into a single package, optimizing board space for complex logic implementations.

Replacement Considerations

SN74F27N (DIP package equivalent)

FAQ

What is the maximum propagation delay for the SN74F27NSR?

The maximum propagation delay is 5 ns when operated at a supply voltage of 5 V.

Does the SN74F27NSR have an enable input?

No, the SN74F27NSR is a basic logic gate without tri-state or enable inputs; it continuously outputs the NOR result of its three inputs.