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SN74HC374ADBRE4 Equivalent & Substitute Parts
Part Overview
The SN74HC374ADBRE4 is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-SSOP package. This component is classified as Obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across a supply voltage range of 2V to 6V with a maximum propagation delay of 31ns at 6V with 50pF load.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SN74HC374ADBRE4 |
| Manufacturer | Texas Instruments |
| Series | 74HC |
| Type | D-Type Flip Flop |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Output Type | Tri-State, Non-Inverted |
| Clock Frequency | 70 MHz |
| Max Propagation Delay @ V, Max CL | 31ns @ 6V, 50pF |
| Trigger Type | Positive Edge |
| Voltage - Supply | 2V ~ 6V |
| Current - Output High, Low | 7.8mA, 7.8mA |
| Current - Quiescent (Iq) | 8 µA |
| Input Capacitance | 3 pF |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 20-SSOP (0.209", 5.30mm Width) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the SN74HC374ADBRE4 is determined by the following critical parameters:
Functional Equivalence Requirements:
- Type: D-Type Flip Flop
- Number of Elements: 1
- Number of Bits per Element: 8
- Output Type: Tri-State, Non-Inverted
- Trigger Type: Positive Edge
Electrical Compatibility Requirements:
- Voltage - Supply: Must support 2V ~ 6V range or be a subset thereof
- Current - Output High, Low: Must meet or exceed 7.8mA capability
- Clock Frequency: Must support minimum 70 MHz operation
- Max Propagation Delay: Must not exceed 31ns at specified voltage and load conditions
Physical and Compliance Requirements:
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical and functional specifications with different packaging or product status) and Manufacturer Recommended Alternatives (enhanced performance characteristics or different base product numbers within compatible series).
Parameter Comparison
| Parameter | SN74HC374ADBRE4 | SN74HC374DBR | 74AHC374PW,118 | 74AHC574PW,118 | 74HC374PW,118 | 74VHC574MTCX | MM74HC374MTCX | MC74HC574ADTR2G |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | onsemi | onsemi | onsemi |
| Series | 74HC | 74HC | 74AHC | 74AHC | 74HC | 74VHC | 74HC | 74HC |
| Type | D-Type | D-Type | D-Type | D-Type | D-Type | D-Type | D-Type | D-Type |
| Number of Bits per Element | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Output Type | Tri-State, Non-Inverted | Tri-State, Non-Inverted | Tri-State, Non-Inverted | Tri-State, Non-Inverted | Tri-State, Non-Inverted | Tri-State, Non-Inverted | Tri-State, Non-Inverted | Tri-State, Non-Inverted |
| Clock Frequency | 70 MHz | 70 MHz | 120 MHz | 115 MHz | 83 MHz | 115 MHz | 35 MHz | 35 MHz |
| Max Propagation Delay @ V, Max CL | 31ns @ 6V, 50pF | 31ns @ 6V, 50pF | 10.1ns @ 5V, 50pF | 10.6ns @ 5V, 50pF | 28ns @ 6V, 50pF | 10.6ns @ 5V, 50pF | 40ns @ 6V, 150pF | 27ns @ 6V, 50pF |
| Trigger Type | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge |
| Current - Output High, Low | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 8mA, 8mA | 8mA, 8mA | 7.8mA, 7.8mA | 8mA, 8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V | 2V ~ 5.5V | 2V ~ 5.5V | 2V ~ 6V | 2V ~ 5.5V | 2V ~ 6V | 2V ~ 6V |
| Current - Quiescent (Iq) | 8 µA | 8 µA | 4 µA | 4 µA | 4 µA | 4 µA | 8 µA | 4 µA |
| Input Capacitance | 3 pF | 3 pF | 3 pF | 3 pF | 4.6 pF | 4 pF | 5 pF | 10 pF |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 85°C | -55°C ~ 125°C |
| Package / Case | 20-SSOP (0.209", 5.30mm) | 20-SSOP (0.209", 5.30mm) | 20-TSSOP (0.173", 4.40mm) | 20-TSSOP (0.173", 4.40mm) | 20-TSSOP (0.173", 4.40mm) | 20-TSSOP (0.173", 4.40mm) | 20-TSSOP (0.173", 4.40mm) | 20-TSSOP (0.173", 4.40mm) |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Direct Parametric Equivalent (Same Package): SN74HC374DBR is the primary equivalent, offering identical electrical specifications and the same 20-SSOP package as the SN74HC374ADBRE4. The distinction is product status: SN74HC374DBR is Active, providing long-term availability and supply continuity. Both parts maintain ROHS3 compliance and MSL 1 rating.
Package Migration Alternatives (20-SSOP to 20-TSSOP): For designs permitting package migration from 20-SSOP (0.209", 5.30mm width) to 20-TSSOP (0.173", 4.40mm width), the following Active parts are available:
74HC374PW,118 (Nexperia) maintains the 74HC series characteristics with Active status and extended operating temperature range (-40°C to 125°C). Propagation delay is 28ns at 6V, 50pF, meeting the original specification.
MM74HC374MTCX (onsemi) provides the same 74HC series foundation with highest inventory availability (12,700 pcs). Note that propagation delay is specified at 40ns with 150pF load, which differs from the original 31ns at 50pF specification.
Enhanced Performance Alternatives: 74AHC374PW,118 and 74AHC574PW,118 (Nexperia) offer superior performance with 120 MHz and 115 MHz clock frequencies respectively, and reduced propagation delays (10.1ns and 10.6ns at 5V, 50pF). These parts support extended temperature range (-40°C to 125°C) and reduced quiescent current (4 µA). Supply voltage range is 2V to 5.5V, which is compatible with the original 2V to 6V specification for applications operating within 5.5V maximum.
74VHC574MTCX (onsemi) delivers equivalent performance to the 74AHC series with 115 MHz operation and 10.6ns propagation delay, with Active product status and 4,054 pcs inventory.
Extended Temperature Range Alternative: MC74HC574ADTR2G (onsemi) extends operating temperature to -55°C to 125°C, suitable for industrial and military applications. This part is Active with 1,400 pcs inventory.
All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility with the original design.
Frequently Asked Questions (FAQ)
Q: Can I use SN74HC374DBR as a direct replacement for SN74HC374ADBRE4? A: Yes. SN74HC374DBR is electrically and functionally identical to SN74HC374ADBRE4, with the same 20-SSOP package, electrical specifications, and operating parameters. The primary difference is product status: SN74HC374DBR is Active, ensuring continued availability.
Q: What is the difference between 20-SSOP and 20-TSSOP packages? A: Both are 20-pin surface mount packages with different body widths. 20-SSOP has a width of 0.209" (5.30mm), while 20-TSSOP has a width of 0.173" (4.40mm). The TSSOP variant is more compact. Pin pitch and electrical connectivity remain compatible for D-type flip-flop logic functions. PCB layout modifications are required for package migration.
Q: Are the 74AHC series parts compatible with my 74HC design? A: The 74AHC series (74AHC374PW,118 and 74AHC574PW,118) are functionally compatible as D-type flip-flops with identical logic operation. However, the supply voltage range differs: 74AHC supports 2V to 5.5V, while the original 74HC supports 2V to 6V. If your design operates at 5.5V or below, 74AHC parts are compatible and offer superior performance (faster propagation delay, lower quiescent current, extended temperature range). For designs requiring 6V operation, 74HC or 74VHC series parts are required.
Q: What does "Obsolete" product status mean for the SN74HC374ADBRE4? A: Obsolete status indicates the manufacturer has discontinued production and support for this specific part number. Existing inventory may be available from distributors, but long-term supply cannot be guaranteed. Migration to an Active equivalent part (such as SN74HC374DBR or 74HC374PW,118) is recommended for new designs and ongoing production.
Q: Can I use MM74HC374MTCX if propagation delay is specified differently? A: MM74HC374MTCX specifies 40ns propagation delay at 6V with 150pF load, compared to the original 31ns at 6V with 50pF load. The different load condition (150pF vs. 50pF) results in higher delay. If your circuit requires propagation delay performance matching the original 31ns specification at 50pF load, MM74HC374MTCX may not be suitable. For applications with less stringent timing requirements, this part is functionally compatible.
Q: Which substitute part has the best availability? A: MM74HC374MTCX has the highest inventory at 12,700 pcs. 74VHC574MTCX follows with 4,054 pcs. Both are Active parts with established supply chains.
Q: Do all substitute parts meet RoHS and MSL requirements? A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) rating, matching the original SN74HC374ADBRE4 specifications.
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