74ACTQ16374SSC Equivalent & Substitute Parts

Part Overview

The 74ACTQ16374SSC is a dual 8-bit D-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 48-BSSOP surface mount package. This component functions as a standard positive edge-triggered flip-flop with tri-state, non-inverted outputs, operating at a clock frequency of 71 MHz with a maximum propagation delay of 7.9 ns at 5V with 50 pF load.

The 74ACTQ16374SSC is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing system maintenance, design updates, and production continuity where this component is specified.

Substiute Parts

74ACTQ16374SSC

onsemiIn Stock: 75074ACTQ16374SSC Datasheet

Current PartRFQ

74ACT16374DLR

Texas InstrumentsIn Stock: 293274ACT16374DLR Datasheet

SimilarRFQ

SN74ACT16374QDLREP

Texas InstrumentsIn Stock: 930SN74ACT16374QDLREP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACTQ16374SSC are identified based on the following critical parameters that determine functional and mechanical compatibility:

Core Functional Parameters:

• Type: D-Type Flip-Flop
• Number of Elements: 2
• Number of Bits per Element: 8
• Output Type: Tri-State, Non-Inverted
• Trigger Type: Positive Edge
• Voltage Supply Range: 4.5V ~ 5.5V
• Input Capacitance: 4.5 pF

Package and Mechanical Parameters:

• Package / Case: 48-BSSOP (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Performance Parameters:

• Clock Frequency: 65 MHz or higher
• Max Propagation Delay: Within acceptable operational limits
• Current Output: Compatible drive capability
• Operating Temperature Range: Minimum -40°C ~ 85°C

The substitute parts listed below meet these criteria and are qualified as direct replacements for the obsolete 74ACTQ16374SSC.

Parameter Comparison

Engineering Selection Recommendations

Both Texas Instruments substitute parts—74ACT16374DLR and SN74ACT16374QDLREP—are active products with current manufacturing status, providing supply chain continuity for the obsolete 74ACTQ16374SSC.

74ACT16374DLR (Texas Instruments): This part maintains identical electrical specifications to the original component, including 24 mA output drive capability and 80 µA quiescent current reduction compared to the onsemi part. The 48-BSSOP package and surface mount configuration are identical. This part is ROHS3 compliant and available in Cut Tape and Digi-Reel packaging formats.

SN74ACT16374QDLREP (Texas Instruments): This variant extends the operating temperature range to -40°C ~ 125°C, providing enhanced thermal performance for applications requiring wider temperature operation. Output drive current is reduced to 16 mA per output. This part is ROHS3 compliant and supplied in Tape & Reel format. The extended temperature range and alternative packaging format make this suitable for applications with elevated thermal requirements.

Both substitutes are electrically and mechanically compatible with the 74ACTQ16374SSC. Selection between them depends on specific application requirements regarding output drive current, temperature range, and packaging format.

Frequently Asked Questions (FAQ)

Q: Can the 74ACT16374DLR directly replace the 74ACTQ16374SSC?

A: Yes. Both parts share identical functional specifications: dual 8-bit D-type flip-flops with tri-state non-inverted outputs, positive edge triggering, 4.5V ~ 5.5V supply voltage, 4.5 pF input capacitance, and 48-BSSOP surface mount packaging. The 74ACT16374DLR is pin-compatible and electrically equivalent.

Q: What is the difference between 74ACT16374DLR and SN74ACT16374QDLREP?

A: The primary differences are output drive current and operating temperature range. The 74ACT16374DLR provides 24 mA output drive at -40°C ~ 85°C. The SN74ACT16374QDLREP provides 16 mA output drive at -40°C ~ 125°C. Both are functionally equivalent D-type flip-flops with identical logic operation. Selection depends on application requirements for output current and thermal performance.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both Texas Instruments substitute parts (74ACT16374DLR and SN74ACT16374QDLREP) are ROHS3 compliant. The original onsemi 74ACTQ16374SSC does not specify RoHS status.

Q: What is the package compatibility between these parts?

A: All three parts use the 48-BSSOP (0.295", 7.50mm Width) surface mount package. Pin configuration and footprint are identical, enabling direct PCB-level substitution without layout modifications.

Q: How do the propagation delays compare?

A: The 74ACTQ16374SSC specifies 7.9 ns maximum propagation delay at 5V with 50 pF load. The 74ACT16374DLR specifies 8.8 ns, and the SN74ACT16374QDLREP specifies 10.9 ns under identical test conditions. All values remain within acceptable logic circuit timing margins for standard applications.

Q: What is the quiescent current difference?

A: The 74ACTQ16374SSC draws 80 µA quiescent current. Both Texas Instruments substitutes (74ACT16374DLR and SN74ACT16374QDLREP) draw 8 µA, representing a 10-fold reduction in standby power consumption.

Q: Are there packaging format differences?

A: Yes. The 74ACT16374DLR is available in Cut Tape (CT) and Digi-Reel formats. The SN74ACT16374QDLREP is supplied in Tape & Reel (TR) format. Both formats are standard surface mount delivery methods; selection depends on assembly process requirements.