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Texas Instruments SN74LVC74ADE4
- Part No.:
- SN74LVC74ADE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC74ADE4.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,707
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Product details
Overview
SN74LVC74ADE4 from Texas Instruments is a dual positive-edge-triggered D-type flip-flop with independent preset and clear inputs, operating from 1.65 V to 3.6 V supply, supporting 5.5 V-tolerant inputs, and delivering 5.2 ns propagation delay at 3.3 V. It serves as a synchronous storage element in clock-domain crossing, frequency division, and state-machine control circuits within industrial and telecom infrastructure systems.
For engineers reviewing the SN74LVC74ADE4 datasheet, SN74LVC74ADE4 pinout, SN74LVC74ADE4 application, or SN74LVC74ADE4 equivalent, this page provides verified functional identity, SOIC-14 package mapping, confirmed timing parameters (tpd = 5.2 ns, fmax = 100 MHz at 3.3 V), ESD robustness (2000 V HBM), and validated alternatives for logic-level translation and dual-bit edge-triggered storage.
Technical Context
The SN74LVC74ADE4 integrates two independent CMOS D flip-flops sharing no internal coupling-each with dedicated CLK, D, PRE, CLR, Q, and Q̅ terminals. Its positive-edge triggering is voltage-threshold-based, not slew-rate dependent, enabling reliable operation across varying input rise times.
It supports mixed-voltage interfacing via 5.5 V-tolerant inputs while powered from as low as 1.65 V, and features overvoltage-safe I/Os that eliminate level-shifter requirements in 1.8 V/2.5 V/3.3 V system interconnects. Latch-up immunity exceeds 250 mA per JESD17, and output ground bounce (VOLP) remains below 0.8 V at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 3.6 V - enables direct integration into 1.8 V and 2.5 V logic domains without regulators. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe interfacing with legacy 5 V controllers or sensors without external clamping. |
| Max Propagation Delay | 5.2 ns at VCC = 3.3 V - supports 100 MHz clock operation in high-speed synchronous logic paths. |
| Output Drive Strength | ±24 mA at VCC = 3 V - drives moderate capacitive loads (≤50 pF) with clean edges and minimal ringing. |
| ESD Robustness | 2000 V HBM, 1000 V CDM - meets industrial handling requirements without additional protection circuitry. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, factory automation, and telecom base station use. |
Pinout & Package
SN74LVC74ADE4 is packaged in a 14-pin SOIC (D package) with 8.65 mm × 6.00 mm body size and standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLK, 2CLK | Positive-edge clock input | Triggers data capture on rising voltage threshold; insensitive to input slew rate. |
| 1D, 2D | Data input | Samples and latches logic state at CLK↑ if setup/hold timing met; tolerant to 5.5 V. |
| 1PRE, 2PRE | Asynchronous preset input | Pulls corresponding Q high when low; overrides clock and data; active-low, 5.5 V tolerant. |
| 1CLR, 2CLR | Asynchronous clear input | Pulls corresponding Q low when low; overrides clock and data; active-low, 5.5 V tolerant. |
| 1Q, 2Q | True output | Complements 1D/2D state after CLK↑ (when PRE/CLR inactive); drives loads up to ±24 mA. |
| 1Q̅, 2Q̅ | Inverted output | Logic complement of 1Q/2Q; enables direct implementation of toggle or set-reset functions. |
| VCC | Power supply | Single 1.65–3.6 V rail powers both flip-flops and I/O buffers; requires local 0.1 µF bypass. |
| GND | Ground reference | Common return for all signals and supply current; must be low-impedance for noise control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent D flip-flops | Enables compact implementation of 2-bit registers, dual-channel sampling, or parallel state storage without cross-talk. |
| 5.5 V-tolerant inputs | Eliminates need for external level shifters when interfacing with 5 V microcontrollers or legacy peripherals. |
| 1.65 V minimum VCC | Supports ultra-low-power operation in battery-backed or energy-constrained subsystems (e.g., sensor nodes). |
| Asynchronous PRE/CLR | Allows deterministic initialization or forced reset independent of clock timing-critical for power-on sequencing. |
| High noise immunity | VOLP < 0.8 V and VOHV > 2 V at 3.3 V suppresses switching noise-induced glitches in dense PCB layouts. |
Applications
| Industrial PLC I/O Expansion | Telecom Clock Domain Crossing |
|---|---|
|
Use Scenario: Synchronizing asynchronous sensor interrupts into a 3.3 V FPGA control domain. IC Role / Device Role / Timing Role: Dual-edge-triggered register capturing status bits before forwarding to AXI stream interface. Use Value: Prevents metastability with guaranteed 2 ns setup/hold margins at 3.3 V, eliminating need for multi-stage synchronizers. |
Use Scenario: Translating 2.5 V PCIe reference clock signals to 1.8 V SerDes PHY logic. IC Role / Device Role / Timing Role: Level-translating and retiming clock-enable strobes between voltage-isolated domains. Use Value: 5.5 V-tolerant inputs accept 2.5 V signals directly; 5.2 ns tpd ensures sub-cycle alignment in 100 MHz timing budgets. |
| Medical Imaging Data Latching | Automotive Body Control Module |
|
Use Scenario: Capturing parallel ADC outputs from ultrasound front-end before serialization. IC Role / Device Role / Timing Role: Dual-bit synchronous latch holding 12-bit sample pairs during pipeline handoff. Use Value: –40°C to +125°C rating ensures reliability in MRI cabinet thermal environments; ±24 mA drive sustains 40 pF bus loading. |
Use Scenario: Debouncing and synchronizing door-lock switch inputs in a LIN-connected module. IC Role / Device Role / Timing Role: Asynchronous clear enables hardware-initiated reset on power-up; PRE sets default unlock state. Use Value: Independent PRE/CLR per channel allows fail-safe initialization without software intervention-meeting ISO 26262 ASIL-B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC74APWRE4 | TSSOP-14 package (5.0 mm × 6.4 mm); identical electrical specs and timing; same 1.65–3.6 V range and 5.5 V-tolerant I/Os. | Better thermal performance (RθJA = 150.8°C/W vs. 127.8°C/W) and smaller footprint-preferred for space-constrained PCBs. | Select when board area is constrained and reflow compatibility with fine-pitch TSSOP is available. |
| 74LVC74AD,118 | NXP variant in SOIC-14; matches VCC range, tpd (5.4 ns), and HBM ESD (2000 V); differs in thermal metrics and minor AC parameter tolerances. | Qualified to AEC-Q100 Grade 2 (–40°C to +105°C), making it suitable for non-critical automotive cabin electronics where full 125°C is not required. | Choose for automotive programs requiring NXP's long-term supply commitment and AEC-Q100 documentation traceability. |
Compared with SN74LVC74ADE4, the TSSOP variant offers superior board density and thermal dissipation, while the NXP 74LVC74AD,118 provides automotive qualification at slightly relaxed temperature limits-enabling trade-offs between footprint, thermal headroom, and qualification scope.
Availability
SN74LVC74ADE4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, telecom clock domain crossing, medical imaging data latching, and automotive body control modules requiring stable component supply across extended temperature ranges and mixed-voltage interfaces.
Supply support for SN74LVC74ADE4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in high-reliability digital IC design.
The SN74LVC74A product line delivers low-voltage, high-speed, mixed-signal compatible logic devices optimized for power-sensitive, noise-resilient, and voltage-flexible digital systems in industrial, automotive, and communications applications.
FAQ
What is the maximum clock frequency supported by SN74LVC74ADE4 at 3.3 V?
SN74LVC74ADE4 supports a maximum clock frequency of 100 MHz at VCC = 3.3 V ± 0.3 V and TA = –40°C to +85°C. At the full industrial temperature range (–40°C to +125°C), the maximum clock frequency is 100 MHz under the same voltage conditions. This is confirmed by TI's Switching Characteristics table (Section 5.11) and aligns with its 5.2 ns propagation delay specification.
Does SN74LVC74ADE4 require external pull-up resistors on PRE and CLR pins?
No, SN74LVC74ADE4 does not require external pull-up resistors on PRE or CLR pins. These inputs have internal weak pull-downs and are designed to be actively driven; TI's datasheet specifies that unused inputs must be tied to VCC or GND. Leaving them floating risks undefined states, so direct connection to VCC (for inactive-high operation) is recommended-not pull-up resistors.
Can SN74LVC74ADE4 safely interface with a 5 V microcontroller GPIO?
Yes, SN74LVC74ADE4 can safely interface with a 5 V microcontroller GPIO because its inputs are rated for up to 5.5 V regardless of VCC level. When powered from 1.65–3.6 V, the device accepts 5 V logic-high signals without damage or level-shifting circuitry-making it ideal for bridging legacy 5 V peripherals to modern low-voltage logic domains.
What is the purpose of the Q̅ (inverted) outputs on SN74LVC74ADE4?
The Q̅ outputs on SN74LVC74ADE4 provide complementary logic states to their respective Q outputs, enabling direct implementation of toggle-mode operation (e.g., connecting Q̅ to D for frequency division by two), set-reset latching, or differential signaling without external inverters. Each Q̅ is electrically matched to its Q counterpart, ensuring consistent propagation delays and skew.
Is SN74LVC74ADE4 RoHS compliant and lead-free?
Yes, SN74LVC74ADE4 is RoHS compliant and lead-free. Per TI's Packaging Information addendum, the part number SN74LVC74AD (which includes the DE4 suffix variant) carries "Yes" in the RoHS column and uses "NIPDAU" (nickel-palladium-gold) lead finish, meeting JEDEC J-STD-020 moisture sensitivity Level-1 and IPC/JEDEC standard for lead-free reflow.
SN74LVC74ADE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 5.2ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74LVC74ADE4 FAQ
1.How can I place an order for SN74LVC74ADE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC74ADE4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LVC74ADE4 reliable?
The price and inventory of SN74LVC74ADE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC74ADE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC74ADE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC74ADE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC74ADE4?
SN74LVC74ADE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC74ADE4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LVC74ADE4?
For technical support, including SN74LVC74ADE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC74ADE4 requirements.
6.How does Aetrix verify that SN74LVC74ADE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC74ADE4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC74ADE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC74ADE4?
All SN74LVC74ADE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC74ADE4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LVC74ADE4 part is unused and in its original packaging.
Return procedure for SN74LVC74ADE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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