SN74LS377NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS377NG4 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 is packaged in a 20-DIP (0.300", 7.62mm) through-hole configuration and operates as a standard D-type flip-flop with 8-bit capacity. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

SN74LS377NG4

Texas InstrumentsIn Stock: 943SN74LS377NG4 Datasheet

Current PartRFQ

SN74LS377N

Texas InstrumentsIn Stock: 2186SN74LS377N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS377NG4 is determined by the following critical parameters that must remain constant across equivalent parts:

• Series designation (74LS)
• Functional type (D-Type flip-flop)
• Number of elements (1) and bits per element (8)
• Clock frequency (40 MHz)
• Propagation delay (27ns @ 5V, 15pF)
• Trigger type (Positive Edge)
• Supply voltage range (4.75V ~ 5.25V)
• Quiescent current (28 mA)
• Operating temperature range (0°C ~ 70°C)
• Package configuration (20-DIP through-hole)

The SN74LS377N qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The primary distinction is product status: SN74LS377N is currently active in inventory, whereas the SN74LS377NG4 is discontinued.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS377N is the appropriate substitute for the discontinued SN74LS377NG4. Both parts maintain identical electrical specifications, timing characteristics, and physical packaging. The SN74LS377N is currently in active production status with established inventory availability, ensuring supply chain continuity for new designs and production requirements.

Both parts comply with ROHS3 standards and maintain REACH unaffected status, satisfying regulatory compliance requirements for industrial and commercial applications. The through-hole 20-DIP package format remains consistent, allowing direct board-level substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS377N be used as a direct replacement for the SN74LS377NG4?

A: Yes. Both parts share identical electrical specifications, timing parameters, supply voltage requirements, and physical package dimensions. Direct substitution is supported at the board level without circuit modification.

Q: What is the difference between the SN74LS377NG4 and SN74LS377N?

A: The primary difference is product status. The SN74LS377NG4 is discontinued, while the SN74LS377N is currently active in production. All functional and electrical parameters remain identical.

Q: Are there any packaging differences between these parts?

A: No. Both parts use the 20-DIP (0.300", 7.62mm) through-hole package configuration with identical pin assignments and mechanical dimensions.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74LS377NG4 and SN74LS377N are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the operating temperature range for these parts?

A: Both parts operate across the temperature range of 0°C to 70°C (TA), suitable for standard industrial and commercial applications.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The SN74LS377N provides full functional and electrical compatibility with the SN74LS377NG4, supporting seamless integration into existing circuit designs without modification.