SN74LS273NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS273NG4 is a Flip Flop 1 Element D-Type 8 Bit Positive Edge logic integrated circuit manufactured by Texas Instruments in the 74LS series. This component functions as a Master Reset device with non-inverted output, housed in a 20-DIP (0.300", 7.62mm) through-hole package. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

SN74LS273NG4

Texas InstrumentsIn Stock: 1159SN74LS273NG4 Datasheet

Current PartRFQ

SN74LS273N

Texas InstrumentsIn Stock: 13841SN74LS273N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS273NG4 is determined by strict equivalence across the following critical parameters:

• Base product number (74LS273)
• Functional type (D-Type Flip Flop, 1 Element, 8 Bit)
• Trigger mechanism (Positive Edge)
• Output configuration (Non-Inverted)
• Electrical specifications (Clock Frequency: 40 MHz, Supply Voltage: 4.75V ~ 5.25V, Operating Temperature: 0°C ~ 70°C)
• Physical package (20-DIP through-hole)
• Propagation delay (27ns @ 5V, 15pF)
• Current ratings (Output High: 400µA, Output Low: 8mA, Quiescent: 27 mA)

The SN74LS273N qualifies as a direct manufacturer-recommended substitute, sharing identical electrical and functional specifications while differing only in packaging format (Tube vs. standard packaging) and product status (Active vs. Discontinued).

Parameter Comparison

Engineering Selection Recommendations

The SN74LS273N is the manufacturer-recommended substitute for the discontinued SN74LS273NG4. Both parts maintain identical electrical performance, functional specifications, and physical package dimensions. The SN74LS273N carries Active product status with current inventory availability, ensuring supply chain continuity. Both parts are ROHS3 Compliant and REACH Unaffected, meeting regulatory requirements for industrial and commercial applications. The transition from the discontinued NG4 variant to the active N variant presents no functional or electrical compatibility concerns for circuit-level integration.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS273N directly replace the SN74LS273NG4 in existing designs?

A: Yes. Both parts share identical electrical specifications, functional characteristics, and 20-DIP package dimensions. No circuit modifications are required.

Q: What is the difference between SN74LS273NG4 and SN74LS273N?

A: The primary differences are packaging format (standard vs. Tube) and product status (Discontinued vs. Active). Electrical and functional specifications are identical.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are ROHS3 Compliant and REACH Unaffected. No compliance differences exist.

Q: What are the critical parameters that define substitution eligibility for 74LS273 logic devices?

A: Substitution is determined by matching the base product number (74LS273), D-Type flip-flop configuration (1 Element, 8 Bit), positive edge trigger mechanism, non-inverted output type, 40 MHz clock frequency, 4.75V ~ 5.25V supply voltage range, 0°C ~ 70°C operating temperature, and 20-DIP through-hole package.

Q: Is the SN74LS273N suitable for new production designs?

A: Yes. The SN74LS273N carries Active product status with established inventory availability, making it suitable for new production designs and ongoing supply requirements.