SNJ54ABT273J Equivalent & Substitute Parts

Part Overview

The SNJ54ABT273J is an octal edge-triggered D-type flip-flop logic integrated circuit manufactured by Texas Instruments. This device functions as a master reset flip-flop with 8-bit positive edge triggering capability, designed for high-speed digital logic applications. The part is currently in active production status with 1269 units available in new original stock. Substitute parts are identified when equivalent functional performance, electrical specifications, and package compatibility can be maintained across different product series or temperature ratings.

Substiute Parts

SNJ54ABT273J

Texas InstrumentsIn Stock: 1294SNJ54ABT273J Datasheet

Current PartRFQ

SN74ABT273N

Texas InstrumentsIn Stock: 1600SN74ABT273N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SNJ54ABT273J can be substituted with the SN74ABT273N based on the following substitution criteria:

Core Functional Equivalence:

• Identical logic function: octal D-type flip-flop with positive edge triggering
• Matching number of elements (1) and bits per element (8)
• Identical clock frequency specification (150 MHz)
• Identical maximum propagation delay (6.8 ns @ 5V, 50pF)
• Matching trigger type (Positive Edge)
• Identical output type (Non-Inverted)
• Matching function (Master Reset)

Electrical Compatibility:

• Identical voltage supply range (4.5V ~ 5.5V)
• Identical input capacitance (7 pF)
• Both devices support the same logic family (ABT series)

Package Compatibility:

• Both devices use 20-pin DIP package format with 0.300" (7.62mm) pitch
• Through-hole mounting type for both devices
• Pin-compatible package footprints

Compliance Alignment:

• Both devices are ROHS3 compliant
• Both devices are REACH unaffected

The primary differences between these parts relate to temperature rating and quiescent current specifications, which do not prevent functional substitution in applications within the overlapping temperature range.

Parameter Comparison

Engineering Selection Recommendations

SNJ54ABT273J Selection Criteria:

• Applications requiring extended low-temperature operation down to -55°C
• Systems where the full military-grade temperature range (-55°C to 125°C) is specified
• Designs with established qualification to the SNJ54 series

SN74ABT273N Selection Criteria:

• Commercial and industrial applications operating within -40°C to 85°C range
• Designs prioritizing lower quiescent current consumption (400 µA vs. 30 mA)
• Applications requiring higher output current capability (32mA/64mA vs. 24mA/48mA)
• Systems where the commercial temperature grade is acceptable

Substitution Feasibility: Both devices are ROHS3 compliant and REACH unaffected, supporting modern environmental and regulatory requirements. The SNJ54ABT273J can be substituted with SN74ABT273N in applications where the operating temperature range does not exceed -40°C to 85°C. The SN74ABT273N cannot substitute for SNJ54ABT273J in applications requiring operation below -40°C.

Frequently Asked Questions (FAQ)

Q: Are SNJ54ABT273J and SN74ABT273N pin-compatible? A: Yes. Both devices use 20-pin DIP packages with 0.300" (7.62mm) pitch and identical pin assignments for D-type flip-flop logic functions. The devices are directly interchangeable at the PCB level.

Q: What is the primary functional difference between these parts? A: There is no functional difference. Both devices perform identical octal D-type flip-flop operations with 150 MHz clock frequency and 6.8 ns propagation delay. Differences exist only in temperature rating, quiescent current, and output current specifications.

Q: Can I use SN74ABT273N in place of SNJ54ABT273J? A: Substitution is possible only if your application operates within the -40°C to 85°C temperature range. If your system requires operation below -40°C or above 85°C, the SNJ54ABT273J must be used.

Q: What does the SNJ54 series designation indicate? A: The SNJ54 prefix indicates a military-grade temperature range (-55°C to 125°C). The SN74 prefix indicates a commercial temperature range (-40°C to 85°C). Both are Texas Instruments ABT logic family devices.

Q: Why does SN74ABT273N have lower quiescent current? A: The quiescent current difference (30 mA vs. 400 µA) reflects different manufacturing processes and design specifications between the military-grade SNJ54 and commercial-grade SN74 series. The SN74ABT273N is optimized for lower standby power consumption in commercial applications.

Q: Are both parts RoHS compliant? A: Yes. Both SNJ54ABT273J and SN74ABT273N are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: What packaging format do these devices use? A: Both devices use 20-pin DIP (Dual Inline Package) with 0.300" (7.62mm) pitch. The SNJ54ABT273J uses CDIP (Ceramic DIP) while the SN74ABT273N uses PDIP (Plastic DIP), but both are mechanically and electrically compatible for through-hole PCB mounting.