SN74LS76AN Equivalent & Substitute Parts

Part Overview

The SN74LS76AN is a dual JK-type flip-flop logic integrated circuit manufactured by Texas Instruments in the 74LS series. This component functions as a 2-element JK flip-flop with 1-bit per element, featuring complementary outputs and negative edge triggering. The device is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance, repairs, and legacy design support. The SN74LS76AN operates within the standard TTL voltage range and is housed in a 16-pin DIP package suitable for through-hole mounting applications.

Substiute Parts

SN74LS76AN

Texas InstrumentsIn Stock: 12488SN74LS76AN Datasheet

Current PartRFQ

SN74LS112AN

Texas InstrumentsIn Stock: 4726SN74LS112AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS76AN is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Type: JK Type flip-flop (2 elements, 1 bit per element)
• Output Type: Complementary outputs
• Trigger Type: Negative edge triggering
• Clock Frequency: 45 MHz minimum

Electrical Parameters:

• Voltage Supply Range: 4.75V ~ 5.25V
• Max Propagation Delay: 20 ns @ 5V, 15pF
• Current Output Specifications: 400µA (high), 8mA (low)
• Operating Temperature: 0°C ~ 70°C

Physical Parameters:

• Package: 16-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• ECCN: EAR99
• HTSUS: 8542.39.0001

The SN74LS112AN qualifies as a direct substitute based on matching all functional, electrical, and physical parameters. Minor variations in quiescent current (6 mA vs. 4 mA) and product status (Active vs. Obsolete) do not affect substitution eligibility, as the device remains within acceptable operating specifications for the 74LS logic family.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS112AN is the qualified substitute for the SN74LS76AN based on functional and electrical equivalence within the 74LS logic family. The primary advantage of selecting the SN74LS112AN is its Active product status, ensuring continued availability and manufacturing support from Texas Instruments, whereas the SN74LS76AN is classified as Obsolete.

Both devices maintain ROHS3 compliance and identical electrical specifications across all critical parameters including voltage supply range, propagation delay, output current ratings, and operating temperature range. The quiescent current difference of 2 mA (6 mA vs. 4 mA) is within acceptable tolerance for TTL logic applications and does not impact functional compatibility.

For applications requiring the SN74LS76AN, the SN74LS112AN provides direct pin-for-pin and functional compatibility with the added benefit of active product status and ongoing supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS112AN directly replace the SN74LS76AN in existing designs?

A: Yes. The SN74LS112AN is a direct substitute with identical pin configuration, package dimensions (16-DIP), and functional specifications. No circuit modifications are required for substitution.

Q: What is the difference between the SN74LS76AN and SN74LS112AN?

A: Both devices are dual JK-type flip-flops with identical functional and electrical characteristics. The primary difference is product status: the SN74LS76AN is Obsolete, while the SN74LS112AN is Active. The SN74LS112AN has a quiescent current of 6 mA compared to 4 mA for the SN74LS76AN, a difference that does not affect circuit operation within standard TTL applications.

Q: Are there any package or mounting differences?

A: No. Both parts use the same 16-DIP (0.300", 7.62mm) package with through-hole mounting. Pin assignments and mechanical dimensions are identical.

Q: Does the quiescent current difference affect my application?

A: The 2 mA difference in quiescent current (4 mA vs. 6 mA) is negligible for most applications. Both devices operate within the standard 74LS logic family specifications and will not impact circuit performance in typical digital logic applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN74LS76AN and SN74LS112AN are ROHS3 compliant, meeting environmental and regulatory requirements for electronic components.

Q: Why is the SN74LS76AN listed as Obsolete?

A: The SN74LS76AN has been discontinued by Texas Instruments. The SN74LS112AN remains in active production and is the recommended source for new designs and replacements.