74ACT16374SSC Equivalent & Substitute Parts

Part Overview

The 74ACT16374SSC 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 across a 4.5V to 5.5V supply voltage range. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74ACT16374SSC

onsemiIn Stock: 79274ACT16374SSC Datasheet

Current PartRFQ

74ACT16374DLR

Texas InstrumentsIn Stock: 293274ACT16374DLR Datasheet

SimilarRFQ

SN74ACT16374QDLREP

Texas InstrumentsIn Stock: 930SN74ACT16374QDLREP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT16374SSC is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Base product number: 74ACT16374
• Package type: 48-BSSOP (0.295", 7.50mm Width)
• Function: D-Type flip-flop, dual 8-bit configuration
• Output type: Tri-state, non-inverted
• Trigger mechanism: Positive edge
• Supply voltage range: 4.5V ~ 5.5V
• Mounting type: Surface mount

Allowable Variation Parameters:

• Clock frequency (71 MHz to 65 MHz acceptable)
• Propagation delay (7.9ns to 10.9ns acceptable)
• Output current (16mA to 24mA acceptable)
• Quiescent current (8 µA to 80 µA acceptable)
• Operating temperature upper limit (-40°C to 85°C or -40°C to 125°C acceptable)
• Product status (active substitutes preferred for obsolete main part)

The identified substitute parts maintain functional and electrical compatibility within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Both Texas Instruments alternatives—74ACT16374DLR and SN74ACT16374QDLREP—are active products with full RoHS3 compliance, providing superior long-term availability compared to the obsolete onsemi 74ACT16374SSC.

74ACT16374DLR Selection Criteria: This part maintains identical output current specifications (24mA, 24mA) and operating temperature range (-40°C ~ 85°C) as the original component. Propagation delay (8.8ns) remains within acceptable tolerance. This option is suitable for designs where the original thermal and current specifications are critical.

SN74ACT16374QDLREP Selection Criteria: This part extends the operating temperature range to -40°C ~ 125°C and reduces quiescent current to 8 µA, offering enhanced thermal performance and lower power consumption. Output current is reduced to 16mA, which remains compatible with standard logic loading. This option is suitable for applications requiring extended temperature operation or reduced power dissipation.

Both substitutes maintain identical functional architecture, package geometry, and electrical interface compatibility with the original 74ACT16374SSC.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16374DLR and SN74ACT16374QDLREP be used interchangeably with 74ACT16374SSC?

A: Both Texas Instruments parts are functionally equivalent to the onsemi 74ACT16374SSC within the defined parameter tolerances. Selection between them depends on specific application requirements regarding temperature range and output current capacity.

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

A: The SN74ACT16374QDLREP offers an extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) and lower output current (16mA versus 24mA). The 74ACT16374DLR maintains closer alignment to the original specifications.

Q: Are there package compatibility concerns when substituting these parts?

A: All three parts use the identical 48-BSSOP (0.295", 7.50mm Width) surface mount package. PCB footprints and assembly processes require no modification.

Q: Do the substitute parts meet current regulatory requirements?

A: Both Texas Instruments alternatives are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The original onsemi part does not specify RoHS compliance.

Q: What is the impact of propagation delay differences on circuit performance?

A: The original part specifies 7.9ns maximum propagation delay. The 74ACT16374DLR specifies 8.8ns, and the SN74ACT16374QDLREP specifies 10.9ns. These differences are within standard logic timing tolerances for most applications operating at or below 65 MHz clock frequencies.

Q: How do quiescent current differences affect power consumption?

A: The original part draws 80 µA quiescent current, while both Texas Instruments alternatives draw 8 µA. This represents a 90% reduction in standby power consumption, beneficial for battery-powered or low-power applications.