74FCT377ATSOG Equivalent & Substitute Parts

Part Overview

The 74FCT377ATSOG is a D-Type flip-flop logic integrated circuit manufactured by Renesas Electronics Corporation. It functions as a single 8-bit positive edge-triggered flip-flop with non-inverted outputs, housed in a 20-SOIC surface mount package. The device is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and legacy design support. Substitute parts must maintain functional compatibility while meeting the same electrical and mechanical specifications.

Substiute Parts

74FCT377ATSOG

Renesas Electronics CorporationIn Stock: 206974FCT377ATSOG Datasheet

Current PartRFQ

CY74FCT377ATSOC

Texas InstrumentsIn Stock: 2019CY74FCT377ATSOC Datasheet

SimilarRFQ

SN74ABT377ADW

Texas InstrumentsIn Stock: 1271SN74ABT377ADW Datasheet

SimilarRFQ

SN74LS377DWR

Texas InstrumentsIn Stock: 978SN74LS377DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74FCT377ATSOG are selected based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

• Type: D-Type flip-flop architecture
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Output Type: Non-Inverted
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C (TA)

Electrical Compatibility Criteria:

• Voltage - Supply: 4.5V ~ 5.5V (or compatible subset)
• Max Propagation Delay @ 5V, 50pF: 7.2ns or faster
• Trigger Type: Positive Edge

All substitute parts listed maintain these core parameters, ensuring direct functional replacement in applications designed for the 74FCT377ATSOG.

Parameter Comparison

Engineering Selection Recommendations

CY74FCT377ATSOC (Texas Instruments): This substitute maintains identical electrical specifications to the 74FCT377ATSOG, including propagation delay and supply voltage range. The device is in active production status, ensuring long-term availability. ROHS3 compliance and MSL 1 rating support modern manufacturing environments. This part is the primary equivalent for direct replacement.

SN74ABT377ADW (Texas Instruments): This substitute offers improved propagation delay (6.8ns versus 7.2ns) and operates within the full 4.5V ~ 5.5V supply range. The 74ABT series provides enhanced performance characteristics while maintaining functional compatibility. Active product status and ROHS3 compliance ensure availability and regulatory compliance. This part is suitable for applications requiring faster switching performance.

SN74LS377DWR (Texas Instruments): This substitute operates within a narrower supply voltage range (4.75V ~ 5.25V) and exhibits significantly slower propagation delay (27ns). The 74LS series is characterized by lower output current capability and higher quiescent current. Operating temperature range is limited to 0°C ~ 70°C. This part is suitable only for applications with relaxed timing requirements and standard industrial temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can the CY74FCT377ATSOC directly replace the 74FCT377ATSOG?

A: Yes. Both devices share identical functional specifications, package type, and electrical parameters. The CY74FCT377ATSOC is the direct equivalent substitute.

Q: What are the key differences between the SN74ABT377ADW and the original 74FCT377ATSOG?

A: The SN74ABT377ADW offers faster propagation delay (6.8ns versus 7.2ns) and higher output current capability. Both operate across the same supply voltage range (4.5V ~ 5.5V) and temperature range (-40°C ~ 85°C). The 74ABT series is suitable for applications requiring improved performance.

Q: Is the SN74LS377DWR a suitable substitute?

A: The SN74LS377DWR maintains functional compatibility but operates with significantly slower propagation delay (27ns) and a narrower supply voltage range (4.75V ~ 5.25V). It is suitable only for applications with relaxed timing requirements and standard industrial temperature ranges (0°C ~ 70°C).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, meeting environmental and regulatory requirements for modern manufacturing.

Q: What packaging format is used for these parts?

A: All parts use the 20-SOIC (0.295", 7.50mm Width) surface mount package. The 74FCT377ATSOG is supplied in Tube packaging, while the CY74FCT377ATSOC is supplied in Tube, and the SN74LS377DWR is supplied in Tape & Reel format.

Q: Can these parts be used interchangeably in all applications?

A: Functional interchangeability is determined by the application's timing, power supply, and temperature requirements. The CY74FCT377ATSOC and SN74ABT377ADW are suitable for applications matching the original 74FCT377ATSOG specifications. The SN74LS377DWR is suitable only for applications with relaxed timing and standard temperature ranges.