MC74HC112ADG Equivalent & Substitute Parts

Part Overview

The MC74HC112ADG is a dual JK-type flip-flop logic integrated circuit manufactured by onsemi in a 16-SOIC surface mount package. This device implements two independent 1-bit JK flip-flops with complementary outputs, negative edge triggering, and Set/Reset functionality. The part is classified as Obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

MC74HC112ADG

onsemiIn Stock: 2335MC74HC112ADG Datasheet

Current PartRFQ

74HC112D,653

Nexperia USA Inc.In Stock: 449374HC112D,653 Datasheet

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CD74HC112M96

Texas InstrumentsIn Stock: 1327CD74HC112M96 Datasheet

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CD74HC112MT

Texas InstrumentsIn Stock: 1554CD74HC112MT Datasheet

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SN74HC112D

Texas InstrumentsIn Stock: 2126SN74HC112D Datasheet

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SN74HC112DR

Texas InstrumentsIn Stock: 2302SN74HC112DR Datasheet

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SN74HC112DT

Texas InstrumentsIn Stock: 2199SN74HC112DT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MC74HC112ADG is determined by strict adherence to the following electrical and mechanical parameters:

Core Substitution Criteria:

• Base product number: 74HC112 (ensures identical logic function and pinout)
• Package type: 16-SOIC (0.154", 3.90mm Width) (ensures mechanical and thermal compatibility)
• Logic function: Dual JK-type flip-flop with complementary outputs and negative edge triggering
• Supply voltage range: 2V ~ 6V (ensures voltage compatibility)
• Output drive capability: 5.2 mA minimum (ensures load driving capability)
• Quiescent current: 4 µA (ensures power consumption compatibility)
• RoHS3 compliance and MSL 1 rating (ensures environmental and handling compatibility)

Substitute parts must maintain these parameters within the specified tolerances. Variations in clock frequency, propagation delay, input capacitance, and operating temperature range are permitted when the substitute part meets or exceeds the performance requirements of the original design.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74HC112DR (Texas Instruments)

The SN74HC112DR is the preferred substitute for the MC74HC112ADG. This part maintains identical propagation delay (21 ns @ 6V, 50pF), matching the timing performance of the original design. Texas Instruments maintains Active product status, ensuring long-term availability and supply chain stability. The part is ROHS3 compliant with MSL 1 rating, meeting all environmental and handling requirements. The operating temperature range of -40°C ~ 85°C covers standard industrial applications, though designs requiring the full -55°C ~ 125°C range should consider CD74HC112M96 or CD74HC112MT.

Secondary Recommendation: CD74HC112M96 (Texas Instruments)

The CD74HC112M96 provides extended operating temperature coverage (-55°C ~ 125°C), matching the original MC74HC112ADG specification. This part is suitable for military-grade or extreme temperature applications. The 30 ns propagation delay is acceptable for designs with timing margins. Active product status ensures availability.

Alternative: 74HC112D,653 (Nexperia USA Inc.)

The 74HC112D,653 offers the highest clock frequency (71 MHz) among available substitutes, providing performance headroom for timing-critical applications. This part is Active and ROHS3 compliant. The 30 ns propagation delay and -40°C ~ 125°C operating temperature range are suitable for most commercial and industrial designs.

Not Recommended: CD74HC112MT, SN74HC112D, SN74HC112DT

CD74HC112MT carries Last Time Buy status, indicating end-of-life phase-out. SN74HC112D and SN74HC112DT are both Discontinued at DiGi Electronics, limiting procurement viability for new designs.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MC74HC112ADG with any of these substitute parts?

A: Yes, all listed substitute parts are pin-compatible and functionally equivalent. All maintain the 16-SOIC package, dual JK-type flip-flop configuration, complementary outputs, and negative edge triggering. Electrical parameters (supply voltage, output drive, quiescent current) are identical across all substitutes.

Q: What is the difference between the propagation delay specifications?

A: The MC74HC112ADG and Texas Instruments parts (SN74HC112D, SN74HC112DR, SN74HC112DT) specify 21 ns maximum propagation delay at 6V with 50pF load. The Nexperia 74HC112D,653 and Texas Instruments CD74HC112M96 and CD74HC112MT specify 30 ns. For timing-critical applications where the original 21 ns specification is required, select SN74HC112DR, SN74HC112D, or SN74HC112DT. For applications with timing margins, the 30 ns parts are acceptable.

Q: Which substitute should I use for extended temperature range applications?

A: The MC74HC112ADG operates from -55°C ~ 125°C. To maintain this full range, select CD74HC112M96 or CD74HC112MT. The Nexperia 74HC112D,653 and Texas Instruments SN74HC112D, SN74HC112DR, and SN74HC112DT operate from -40°C ~ 85°C, which is suitable for commercial and industrial applications but does not cover the full military temperature range.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the environmental compliance of the original MC74HC112ADG.

Q: What is the difference between packaging options (Tube, Cut Tape, Tape & Reel)?

A: Packaging affects procurement and handling but does not impact electrical or mechanical compatibility. Tube packaging is suitable for small-quantity orders. Cut Tape (CT) & Digi-Reel® packaging is standard for medium-volume procurement. Tape & Reel (TR) packaging is optimized for high-volume automated assembly. Select based on your procurement volume and assembly process requirements.

Q: Can I use the Nexperia 74HC112D,653 if my design requires 21 ns propagation delay?

A: The Nexperia part specifies 30 ns maximum propagation delay, which is slower than the original 21 ns specification. Use this part only if your circuit design includes sufficient timing margins to accommodate the additional 9 ns delay. For timing-critical applications, select Texas Instruments SN74HC112DR.

Q: What is the significance of "Product Status" in the comparison table?

A: Product Status indicates manufacturer support and supply availability. Active parts are in full production with long-term availability. Last Time Buy indicates the manufacturer is phasing out the part. Discontinued at DiGi Electronics indicates the distributor no longer stocks the part, though it may be available from other sources. Obsolete indicates the manufacturer has ended production. For new designs, prioritize Active status parts (SN74HC112DR, 74HC112D,653, CD74HC112M96).