SN74LS112AD Equivalent & Substitute Parts

Part Overview

The SN74LS112AD is a dual JK-type flip-flop logic integrated circuit manufactured by Texas Instruments. This device functions as a 2-element, 1-bit per element flip-flop with complementary outputs, triggered on negative edge clock transitions. The SN74LS112AD is classified as Last Time Buy, indicating discontinued production. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

SN74LS112AD

Texas InstrumentsIn Stock: 1724SN74LS112AD Datasheet

Current PartRFQ

SN74LS112ADR

Texas InstrumentsIn Stock: 3606SN74LS112ADR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LS112AD is determined by strict equivalence across the following critical parameters:

• Functional Type: Dual JK-type flip-flop with 2 elements, 1 bit per element
• Output Configuration: Complementary outputs
• Trigger Mechanism: Negative edge triggered
• Electrical Performance: Clock frequency of 45 MHz, propagation delay of 20 ns @ 5V with 15pF load
• Supply Voltage Range: 4.75V ~ 5.25V
• Output Drive Capability: 400µA high, 8mA low
• Package Format: 16-SOIC (0.154", 3.90mm Width) surface mount
• Compliance Standards: ROHS3 compliant, REACH unaffected

Only parts meeting all these criteria qualify as direct substitutes. The SN74LS112ADR is identified as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS112ADR is the direct substitute for the SN74LS112AD. Both parts are manufactured by Texas Instruments and share identical electrical specifications, functional characteristics, and package format. The primary distinction is product status: the SN74LS112AD is Last Time Buy (discontinued), while the SN74LS112ADR maintains Active status with ongoing manufacturing support.

Both parts meet ROHS3 compliance and REACH requirements, ensuring regulatory alignment for current and future production. The SN74LS112ADR is recommended for new designs and ongoing production due to its active availability and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS112ADR directly replace the SN74LS112AD in existing designs?

A: Yes. The SN74LS112ADR is electrically and mechanically identical to the SN74LS112AD. All electrical parameters, timing specifications, output drive capabilities, and package dimensions are equivalent. No circuit modifications are required.

Q: What is the difference between SN74LS112AD and SN74LS112ADR?

A: The primary difference is product lifecycle status. The SN74LS112AD is Last Time Buy (production discontinued), while the SN74LS112ADR is Active (ongoing production). Electrically and functionally, both parts are identical.

Q: Are both parts available in the same package?

A: Yes. Both the SN74LS112AD and SN74LS112ADR are supplied in 16-SOIC (0.154", 3.90mm Width) surface mount packages. PCB footprints and assembly processes are identical.

Q: Do both parts meet current compliance standards?

A: Yes. Both the SN74LS112AD and SN74LS112ADR are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronics manufacturing.

Q: What is the clock frequency specification for these parts?

A: Both parts support a maximum clock frequency of 45 MHz with a propagation delay of 20 ns at 5V supply voltage with a 15pF load.

Q: Are there any temperature or voltage operating differences?

A: No. Both parts operate identically across the 0°C to 70°C temperature range and require a 4.75V to 5.25V supply voltage. Output drive capabilities and quiescent current specifications are identical.