74ABT16374CSSCX Equivalent & Substitute Parts

Part Overview

The 74ABT16374CSSCX 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 150 MHz with a maximum propagation delay of 6.2 ns at 5V with 50 pF load. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new designs requiring compatible functionality.

Substiute Parts

74ABT16374CSSCX

onsemiIn Stock: 162774ABT16374CSSCX Datasheet

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74FCT162374CTPVCT

Texas InstrumentsIn Stock: 227274FCT162374CTPVCT Datasheet

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74FCT16374ATPVG

Renesas Electronics CorporationIn Stock: 180074FCT16374ATPVG Datasheet

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CY74FCT162374CTPVC

Texas InstrumentsIn Stock: 2988CY74FCT162374CTPVC Datasheet

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CY74FCT16374TPVC

Texas InstrumentsIn Stock: 2451CY74FCT16374TPVC Datasheet

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SN74ABT16374ADGGR

Texas InstrumentsIn Stock: 3748SN74ABT16374ADGGR Datasheet

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SN74ABT16374ADL

Texas InstrumentsIn Stock: 3153SN74ABT16374ADL Datasheet

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SN74ABT16374ADLR

Texas InstrumentsIn Stock: 5678SN74ABT16374ADLR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT16374CSSCX is determined by the following critical parameters:

Functional Compatibility Requirements:

• Type: D-Type Flip-Flop (2 elements, 8 bits per element)
• Output Type: Tri-State, Non-Inverted
• Trigger Type: Positive Edge
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C

Electrical Performance Criteria:

• Clock Frequency: 150 MHz minimum
• Max Propagation Delay: 6.2 ns or better at 5V, 50 pF load
• Current Output Capability: 32 mA (high), 64 mA (low)
• Quiescent Current: 2 mA or lower

Package Compatibility:

• Primary: 48-BSSOP (0.295", 7.50mm Width) for direct pin-for-pin replacement
• Alternative: 48-TFSOP (0.240", 6.10mm Width) for footprint-compatible designs with PCB layout adjustment

Substitute parts are grouped into two categories: direct package equivalents (48-BSSOP) and package variants (48-TFSOP) that maintain electrical compatibility but require PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct 48-BSSOP Package Replacement):

SN74ABT16374ADL and SN74ABT16374ADLR are the preferred substitutes for the 74ABT16374CSSCX. Both are manufactured by Texas Instruments, maintain the same 48-BSSOP package footprint, and are currently in active product status. These parts deliver superior propagation delay performance (4.7 ns versus 6.2 ns), matching or exceeding the electrical specifications of the original part. Both are ROHS3 compliant with MSL 1 rating, ensuring compatibility with modern manufacturing processes and long-term storage capability.

Secondary Substitute (Package Variant - 48-TFSOP):

SN74ABT16374ADGGR provides an alternative for designs that can accommodate PCB layout modification. This Texas Instruments part uses a narrower 48-TFSOP package (0.240" width versus 0.295"), offers improved propagation delay (5.6 ns), and maintains active product status with ROHS3 compliance. This option is suitable for space-constrained applications where the footprint reduction justifies PCB redesign.

Alternative Series Substitutes (74FCT Series):

The 74FCT series parts (74FCT162374CTPVCT, 74FCT16374ATPVG, CY74FCT162374CTPVC, CY74FCT16374TPVC) maintain functional compatibility with tri-state, non-inverted outputs and positive edge triggering. However, these parts exhibit lower quiescent current (500 µA versus 2 mA) and reduced output current capability in some variants (24 mA versus 32 mA high-side drive). The 74FCT16374ATPVG from Renesas Electronics is the only active product in this group and features MSL 3 rating, requiring controlled moisture exposure during storage and handling. These substitutes are suitable when lower power consumption is a design priority.

Compliance and Certification:

All recommended active substitutes carry ROHS3 compliance certification. The 74ABT series maintains superior quiescent current performance and output drive capability, making it the optimal choice for direct replacement. The 74FCT series offers power efficiency benefits but requires evaluation of output current requirements and moisture sensitivity handling procedures.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT16374ADL directly replace the 74ABT16374CSSCX without PCB modification?

A: Yes. SN74ABT16374ADL is a direct pin-for-pin replacement. Both parts use the 48-BSSOP package with identical pinout, electrical specifications within compatible ranges, and the same supply voltage range (4.5V ~ 5.5V). No PCB layout changes are required.

Q: What is the difference between SN74ABT16374ADL and SN74ABT16374ADLR?

A: Both parts are electrically identical. The primary difference is packaging: ADL is supplied in Tube packaging, while ADLR is supplied in Tape & Reel (TR) format. ADLR is preferred for high-volume production and automated assembly processes. Select based on your procurement and assembly requirements.

Q: Why is SN74ABT16374ADGGR listed as a substitute if it uses a different package?

A: SN74ABT16374ADGGR uses the 48-TFSOP package (0.240" width) instead of 48-BSSOP (0.295" width). While electrically compatible, this part requires PCB footprint redesign. It is suitable for new designs or redesigns where the narrower package footprint provides space savings. Existing boards designed for 48-BSSOP cannot accommodate this variant without layout modification.

Q: Are the 74FCT series parts suitable replacements for the 74ABT16374CSSCX?

A: The 74FCT series maintains functional compatibility (D-type flip-flop, 2 elements, 8 bits, tri-state output, positive edge trigger). However, differences exist: 74FCT parts consume less quiescent current (500 µA versus 2 mA) and some variants provide lower output current (24 mA versus 32 mA). Evaluate your circuit's output current requirements and power budget before selecting 74FCT variants. The 74FCT16374ATPVG from Renesas is the only active product in this series.

Q: What does MSL 3 rating mean for the 74FCT16374ATPVG?

A: MSL (Moisture Sensitivity Level) 3 indicates the part requires controlled moisture exposure during storage and handling, with a maximum floor life of 168 hours at 30°C and 60% relative humidity after the moisture barrier bag is opened. This requires more stringent storage procedures compared to MSL 1 parts (unlimited floor life). Ensure your manufacturing environment and supply chain can support these handling requirements.

Q: Can I use 74FCT162374CTPVCT or CY74FCT162374CTPVC as direct replacements?

A: Both parts are functionally compatible but are currently obsolete. While they maintain the same electrical specifications and 48-BSSOP package, their obsolete status makes them unsuitable for new designs or long-term production support. Use active products (SN74ABT16374ADL, SN74ABT16374ADLR, or 74FCT16374ATPVG) for ongoing applications.

Q: What are the key electrical differences between 74ABT and 74FCT series?

A: The 74ABT series (original part and primary substitutes) operates at 150 MHz clock frequency with 2 mA quiescent current and 32 mA/64 mA output drive. The 74FCT series does not specify clock frequency, operates at 500 µA quiescent current, and provides 24 mA or 32 mA output drive depending on variant. Select 74ABT for higher performance and output drive; select 74FCT for lower power consumption applications.

Q: Is the propagation delay difference between 4.7 ns and 6.2 ns significant for my application?

A: The 1.5 ns improvement offered by SN74ABT16374ADL and SN74ABT16374ADLR provides timing margin for high-speed digital circuits. If your design operates near the maximum clock frequency (150 MHz), the faster propagation delay reduces setup and hold time violations. For lower-speed applications, this difference is negligible. Review your circuit's timing requirements and clock frequency to determine if this improvement is necessary.