SN74AC14NS Equivalent & Substitute Parts

Part Overview

The SN74AC14NS is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in the 74AC logic series. This component is designed for signal inversion applications requiring noise immunity through Schmitt trigger hysteresis. The SN74AC14NS is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

SN74AC14NS

Texas InstrumentsIn Stock: 66138SN74AC14NS Datasheet

Current PartRFQ

SN74AC14NSR

Texas InstrumentsIn Stock: 66074SN74AC14NSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AC14NS is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Logic type (Inverter)
• Number of circuits (6)
• Number of inputs (6)
• Schmitt trigger feature presence

Electrical Parameters:

• Supply voltage range (2V ~ 6V)
• Quiescent current maximum (2 µA)
• Output current capability (24mA high and low)
• Propagation delay (10ns @ 5V, 50pF)
• Operating temperature range (-40°C ~ 85°C)

Physical Parameters:

• Package type (14-SOIC)
• Package dimensions (0.209", 5.30mm Width)
• Surface mount mounting type

Compliance Parameters:

• RoHS3 compliance
• MSL rating (1 - Unlimited)

The SN74AC14NSR qualifies as a direct substitute based on identical functional, electrical, and physical specifications. Differences in input logic level thresholds and packaging format do not preclude substitution when the application requirements fall within both parts' specified ranges.

Parameter Comparison

Engineering Selection Recommendations

The SN74AC14NSR is the primary substitute for the discontinued SN74AC14NS. Both parts are manufactured by Texas Instruments and share identical electrical and physical specifications across all critical parameters. The SN74AC14NSR maintains active product status, ensuring continued availability and supply chain reliability.

Selection between these parts should be based on:

Product Status: The SN74AC14NSR is active and recommended for new designs and ongoing production. The SN74AC14NS is discontinued and should be replaced in active procurement.

Compliance: Both parts meet ROHS3 compliance requirements and carry MSL rating 1 (Unlimited moisture sensitivity), suitable for standard storage and handling conditions.

Packaging: The SN74AC14NSR is supplied in Cut Tape (CT) and Digi-Reel® formats, providing flexibility for both manual assembly and automated pick-and-place operations. Packaging format selection depends on production volume and assembly methodology.

Supply Chain: The SN74AC14NSR has confirmed inventory availability (65,980 pieces in stock), supporting both prototype and production-volume requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74AC14NSR directly replace the SN74AC14NS in existing designs?

A: Yes. The SN74AC14NSR is electrically and mechanically equivalent to the SN74AC14NS. Both parts share identical supply voltage ranges (2V ~ 6V), output current ratings (24mA), propagation delay (10ns @ 5V, 50pF), and operating temperature range (-40°C ~ 85°C). The 14-SOIC package dimensions are identical, allowing direct PCB footprint compatibility.

Q: What are the differences between SN74AC14NS and SN74AC14NSR?

A: The primary differences are product status and packaging format. The SN74AC14NS is discontinued; the SN74AC14NSR is active. The SN74AC14NSR is supplied in Cut Tape (CT) and Digi-Reel® formats, while the SN74AC14NS was supplied in standard packaging. Input logic level thresholds differ slightly (SN74AC14NS: 1V ~ 2.3V low, 2.2V ~ 3.9V high; SN74AC14NSR: 0.5V ~ 1.1V low, 2.2V ~ 3.9V high), but both ranges are compatible with standard TTL and CMOS logic levels.

Q: Are there any package or pinout differences?

A: No. Both parts use the 14-SOIC package with identical pinout and dimensions (0.209" width, 5.30mm). No PCB layout modifications are required for substitution.

Q: What is the MSL rating, and does it affect storage or handling?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard storage conditions without desiccant or controlled humidity are acceptable.

Q: Is the SN74AC14NSR suitable for new product designs?

A: Yes. The SN74AC14NSR is active and recommended for new designs. It provides long-term supply availability and full manufacturer support.

Q: What is the difference between Cut Tape and Digi-Reel® packaging?

A: Cut Tape (CT) packaging provides individual component strips suitable for manual assembly and small-volume prototyping. Digi-Reel® packaging provides continuous reel format optimized for automated pick-and-place assembly in production environments. Both formats contain identical components.