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74LVC74AD,112 Equivalent & Substitute Parts Reference
Part Overview
The 74LVC74AD,112 is a dual D-type flip-flop logic integrated circuit manufactured by Nexperia USA Inc. in 14-SOIC surface mount packaging. This device features complementary outputs, positive edge triggering, and operates across a supply voltage range of 1.2V to 3.6V with a maximum propagation delay of 5.2ns at 3.3V with 50pF load. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74LVC74AD,112 |
| Manufacturer | Nexperia USA Inc. |
| Series | 74LVC |
| Type | D-Type Flip-Flop |
| Number of Elements | 2 |
| Number of Bits per Element | 1 |
| Output Type | Complementary |
| Clock Frequency | 150 MHz |
| Max Propagation Delay @ 3.3V, 50pF | 5.2ns |
| Trigger Type | Positive Edge |
| Current - Output High/Low | 24mA / 24mA |
| Voltage - Supply | 1.2V ~ 3.6V |
| Current - Quiescent (Iq) | 10 µA |
| Input Capacitance | 4 pF |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the 74LVC74AD,112 is determined by the following critical parameters:
Core Functional Requirements:
- Dual D-type flip-flop configuration with 2 elements, 1 bit per element
- Complementary output type
- Positive edge trigger mechanism
- Set (Preset) and Reset function capability
Electrical Compatibility Parameters:
- Clock frequency: 150 MHz minimum
- Maximum propagation delay: 5.2ns @ 3.3V, 50pF load
- Output drive capability: 24mA high and low
- Quiescent current: 10 µA
- Supply voltage range must encompass 1.2V to 3.6V or be compatible with 3.3V operation
Physical & Environmental Requirements:
- 14-SOIC (0.154", 3.90mm Width) package
- Surface mount mounting type
- Operating temperature range: -40°C to 125°C minimum
- RoHS3 compliance
- MSL 1 (Unlimited) moisture sensitivity
Substitute parts are grouped into two categories based on supply voltage compatibility and product status:
Category A - Full Voltage Range Compatible (1.65V ~ 3.6V or better): SN74LVC74AD, SN74LVC74ADR, SN74LVC74ADT, SN74LVC74ADE4
Category B - Reduced Voltage Range (2V ~ 3.6V): 74LCX74M, MC74LCX74DG, MC74LCX74DR2G, SN74LVC74AMDREP, SN74LVC74AQDREP, SN74LVC74AQDRG4Q1
Parameter Comparison
| Part Number | Manufacturer | Series | Clock Freq (MHz) | Prop Delay @ 3.3V, 50pF (ns) | Supply Voltage (V) | Input Cap (pF) | Temp Range (°C) | Product Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|
| 74LVC74AD,112 | Nexperia USA Inc. | 74LVC | 150 | 5.2 | 1.2 ~ 3.6 | 4 | -40 ~ 125 | Obsolete | Tube |
| SN74LVC74AD | Texas Instruments | 74LVC | 150 | 5.2 | 1.65 ~ 3.6 | 5 | -40 ~ 125 | Active | Tube |
| SN74LVC74ADR | Texas Instruments | 74LVC | 150 | 5.2 | 1.65 ~ 3.6 | 5 | -40 ~ 125 | Active | Cut Tape & Digi-Reel |
| SN74LVC74ADT | Texas Instruments | 74LVC | 150 | 5.2 | 1.65 ~ 3.6 | 5 | -40 ~ 125 | Active | Tape & Reel |
| SN74LVC74ADE4 | Texas Instruments | 74LVC | 150 | 5.2 | 1.65 ~ 3.6 | 5 | -40 ~ 125 | Discontinued at DiGi Electronics | - |
| 74LCX74M | Fairchild Semiconductor | 74LCX | 150 | 7 | 2 ~ 3.6 | 7 | -40 ~ 85 | Active | Bulk |
| MC74LCX74DG | onsemi | 74LCX | 150 | 7 | 2 ~ 3.6 | 7 | -40 ~ 85 | Active | Tube |
| MC74LCX74DR2G | onsemi | 74LCX | 150 | 7 | 2 ~ 3.6 | 7 | -40 ~ 85 | Active | Tape & Reel |
| SN74LVC74AMDREP | Texas Instruments | 74LVC | 100 | 5.2 | 2 ~ 3.6 | 5 | -55 ~ 125 | Active | Tape & Reel |
| SN74LVC74AQDREP | Texas Instruments | 74LVC | 150 | 5.2 | 2 ~ 3.6 | 5 | -40 ~ 125 | Active | Tape & Reel |
| SN74LVC74AQDRG4Q1 | Texas Instruments | 74LVC | 150 | 5.2 | 2 ~ 3.6 | 5 | -40 ~ 125 | Active | Tape & Reel |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
SN74LVC74AD, SN74LVC74ADR, and SN74LVC74ADT are direct functional equivalents from Texas Instruments within the 74LVC series. These parts maintain identical electrical specifications including 5.2ns propagation delay, 150 MHz clock frequency, and -40°C to 125°C operating temperature range. The supply voltage range of 1.65V to 3.6V is compatible with 3.3V systems. All three are RoHS3 compliant with MSL 1 rating. Selection among these three depends on packaging requirements: tube for SN74LVC74AD, cut tape for SN74LVC74ADR, or tape & reel for SN74LVC74ADT.
Secondary Substitutes (Reduced Temperature Range):
74LCX74M, MC74LCX74DG, and MC74LCX74DR2G are functionally equivalent but operate within a reduced temperature range of -40°C to 85°C. These parts exhibit 7ns propagation delay and require minimum 2V supply voltage. Selection is appropriate for applications not requiring the full -40°C to 125°C range. MC74LCX74DR2G offers the highest inventory availability.
Extended Temperature Substitute:
SN74LVC74AMDREP operates from -55°C to 125°C, extending the lower temperature limit. Clock frequency is reduced to 100 MHz. This part is suitable for applications requiring extended low-temperature operation.
Automotive Grade Option:
SN74LVC74AQDRG4Q1 is AEC-Q100 qualified for automotive applications, maintaining full 150 MHz operation and -40°C to 125°C temperature range with 2V to 3.6V supply voltage.
Avoid:
SN74LVC74ADE4 is discontinued at DiGi Electronics and should not be selected for new designs.
Frequently Asked Questions (FAQ)
Q: Can I use 74LCX74M as a direct replacement for 74LVC74AD,112?
A: The 74LCX74M is functionally compatible but with two limitations. The operating temperature range is reduced to -40°C to 85°C (versus -40°C to 125°C), and propagation delay increases to 7ns (versus 5.2ns). Use only if your application does not require the full temperature range or faster switching speed.
Q: What is the difference between SN74LVC74AD, SN74LVC74ADR, and SN74LVC74ADT?
A: These three parts are electrically identical. The differences are packaging formats: SN74LVC74AD is supplied in tube, SN74LVC74ADR in cut tape with Digi-Reel, and SN74LVC74ADT in tape & reel. Select based on your assembly process requirements.
Q: Is the 74LVC74AD,112 compatible with 1.2V supply voltage?
A: The original 74LVC74AD,112 supports 1.2V to 3.6V. Most active substitutes (SN74LVC74AD, SN74LVC74ADR, SN74LVC74ADT) have a minimum supply of 1.65V. For 1.2V operation, verify the specific substitute part's datasheet or consider the SN74LVC74AMDREP which maintains broader voltage compatibility.
Q: Can I use SN74LVC74AQDRG4Q1 in non-automotive applications?
A: Yes. SN74LVC74AQDRG4Q1 is AEC-Q100 qualified but functionally identical to other 74LVC variants. It can be used in any application requiring the same electrical specifications. Automotive qualification does not restrict use in other applications.
Q: What is the impact of increased propagation delay in 74LCX variants?
A: The 74LCX series has 7ns propagation delay compared to 5.2ns in 74LVC variants. This 1.8ns difference is significant only in high-speed timing-critical applications. For most general-purpose logic applications, this difference is negligible.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original 74LVC74AD,112 specifications.
Q: Which substitute has the best inventory availability?
A: MC74LCX74DR2G from onsemi has the highest inventory at 10,387 pieces. SN74LVC74AQDRG4Q1 from Texas Instruments has 3,350 pieces available.
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