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74FCT374CTSOG8 Equivalent & Substitute Parts
Part Overview
The 74FCT374CTSOG8 is a D-type flip-flop logic integrated circuit manufactured by Renesas Electronics Corporation, configured as a single element with 8-bit positive edge triggering. This component operates as a standard octal latch with tri-state, non-inverted outputs in a 20-SOIC surface mount package. The part is currently in Last Time Buy status, indicating end-of-life production. Equivalent and substitute parts are necessary to ensure design continuity and maintain supply chain flexibility for applications requiring D-type flip-flop functionality with compatible electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Part Number | 74FCT374CTSOG8 |
| Manufacturer | Renesas Electronics Corporation |
| Type | D-Type Flip-Flop |
| Number of Bits | 8 |
| Output Type | Tri-State, Non-Inverted |
| Package | 20-SOIC (0.295", 7.50mm Width) |
| Trigger Type | Positive Edge |
| Voltage Supply | 4.5V ~ 5.5V |
| Max Propagation Delay | 5.2ns @ 5V, 50pF |
| Operating Temperature | -40°C ~ 85°C |
| RoHS Status | ROHS3 Compliant |
| Product Status | Last Time Buy |
Substitute Part Grouping Explanation
Substitution eligibility for the 74FCT374CTSOG8 is determined by the following critical parameters:
Mandatory Compatibility Criteria:
- D-Type flip-flop architecture with 8-bit configuration
- Positive edge trigger functionality
- Tri-state output capability
- 20-SOIC package form factor
- Supply voltage range compatibility (4.5V ~ 5.5V or 4.75V ~ 5.25V)
- Operating temperature range of -40°C ~ 85°C
- ROHS3 compliance and EAR99 classification
Acceptable Variation Parameters:
- Propagation delay up to 10ns @ 5V, 50pF
- Output current specifications (15mA to 64mA high, 12mA to 64mA low)
- Quiescent current (1µA to 200µA)
- Input capacitance (5pF to 10pF)
- Packaging format (Tube or Tape & Reel)
Substitute parts must maintain functional equivalence in logic operation, pin configuration, and electrical interface while meeting or exceeding the original specifications within acceptable engineering tolerances.
Parameter Comparison
| Part Number | Manufacturer | Voltage Supply | Max Propagation Delay | Operating Temp | Output Type | Package | Product Status | RoHS |
|---|---|---|---|---|---|---|---|---|
| 74FCT374CTSOG8 | Renesas | 4.5V ~ 5.5V | 5.2ns @ 5V, 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Last Time Buy | ROHS3 |
| CD74FCT374M | Texas Instruments | 4.75V ~ 5.25V | 6.6ns @ 5V, 50pF | 0°C ~ 70°C | Tri-State, Non-Inverted | 20-SOIC | Active | ROHS3 |
| CY74FCT2574CTSOC | Texas Instruments | 4.75V ~ 5.25V | 5.2ns @ 5V, 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Active | ROHS3 |
| CY74FCT374ATSOC | Texas Instruments | 4.75V ~ 5.25V | 6.5ns @ 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Active | ROHS3 |
| CY74FCT374ATSOCT | Texas Instruments | 4.75V ~ 5.25V | 6.5ns @ 5V, 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Active | ROHS3 |
| CY74FCT374CTSOC | Texas Instruments | 4.75V ~ 5.25V | 5.2ns @ 5V, 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Active | ROHS3 |
| CY74FCT374TSOC | Texas Instruments | 4.75V ~ 5.25V | 10ns @ 5V, 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Active | ROHS3 |
| CY74FCT374TSOCT | Texas Instruments | 4.75V ~ 5.25V | 10ns @ 5V, 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Discontinued | ROHS3 |
| CY74FCT377ATSOC | Texas Instruments | 4.75V ~ 5.25V | 7.2ns @ 5V, 50pF | -40°C ~ 85°C | Non-Inverted | 20-SOIC | Active | ROHS3 |
| CY74FCT574ATSOC | Texas Instruments | 4.75V ~ 5.25V | 7.2ns @ 50pF | -40°C ~ 85°C | Tri-State, Non-Inverted | 20-SOIC | Active | ROHS3 |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
CY74FCT374CTSOC and CY74FCT2574CTSOC are the preferred direct substitutes. Both maintain identical propagation delay specifications (5.2ns @ 5V, 50pF), full tri-state output capability, and extended operating temperature range (-40°C ~ 85°C). Both are Active status products with ROHS3 compliance and available in Tube packaging. These parts ensure functional and electrical equivalence with minimal design impact.
Secondary Substitutes (Acceptable Performance):
CY74FCT374ATSOC and CY74FCT374ATSOCT provide active product status with extended temperature range support. Propagation delay increases to 6.5ns, which remains within acceptable engineering tolerance for most applications. CY74FCT374ATSOCT is available in Tape & Reel packaging, matching the original part's packaging format. Both maintain tri-state output and ROHS3 compliance.
Conditional Substitutes (Application-Dependent):
CD74FCT374M is an active Texas Instruments product but operates within a narrower temperature range (0°C ~ 70°C), making it unsuitable for applications requiring -40°C operation. CY74FCT374TSOC and CY74FCT374TSOCT exhibit 10ns propagation delay, acceptable only for timing-non-critical applications. CY74FCT374TSOCT is discontinued and should be avoided for new designs.
Not Recommended:
CY74FCT377ATSOC lacks tri-state output capability, limiting its functional equivalence. CY74FCT574ATSOC, while functionally similar, represents a different base product number and should be evaluated separately for application compatibility.
Frequently Asked Questions (FAQ)
Q: Can CD74FCT374M replace the 74FCT374CTSOG8 in all applications?
A: CD74FCT374M is functionally compatible but operates only within 0°C ~ 70°C. Applications requiring -40°C operation must use alternatives such as CY74FCT374CTSOC or CY74FCT2574CTSOC.
Q: What is the significance of propagation delay differences between substitutes?
A: Propagation delay determines the maximum speed at which the flip-flop responds to input signals. The original part specifies 5.2ns. Substitutes with 6.5ns or 7.2ns delays remain compatible with most standard logic applications. Parts with 10ns delays are acceptable only where timing margins are not critical.
Q: Are Tube and Tape & Reel packaging interchangeable?
A: Both packaging formats contain identical die and electrical specifications. Tape & Reel packaging is optimized for automated assembly, while Tube packaging is suitable for manual handling and lower-volume applications. Selection depends on manufacturing process requirements, not electrical compatibility.
Q: Why is CY74FCT377ATSOC listed as a substitute if it lacks tri-state output?
A: CY74FCT377ATSOC shares the same 8-bit D-type flip-flop architecture and package but provides non-inverted output without tri-state capability. It is functionally equivalent only for applications that do not require output tri-stating. Designs dependent on tri-state functionality must exclude this part.
Q: What does "Last Time Buy" status mean for the original part?
A: Last Time Buy indicates the manufacturer has ceased production and will not accept new orders beyond a specified date. Existing inventory may be available, but long-term supply is not guaranteed. Substitution to Active status parts ensures continued availability for future production runs.
Q: Are all listed substitutes ROHS3 compliant?
A: Yes. All substitute parts listed maintain ROHS3 compliance and EAR99 classification, matching the regulatory status of the original 74FCT374CTSOG8.
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