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Texas Instruments SN74AUC2G79DCURE4
- Part No.:
- SN74AUC2G79DCURE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
SN74AUC2G79DCURE4.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,610
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Product details
Overview
SN74AUC2G79DCURE4 from Texas Instruments is a dual positive-edge-triggered D-type flip-flop in VSSOP (DCU) 8-pin package, operating from 0.8 V to 2.7 V with 1.9 ns max propagation delay at 1.8 V, ±8-mA output drive, and Ioff support for partial power-down mode - used in low-voltage clock-domain synchronization and data latching in portable interface logic.
For engineers reviewing the SN74AUC2G79DCURE4 datasheet, SN74AUC2G79DCURE4 pinout, SN74AUC2G79DCURE4 application, or SN74AUC2G79DCURE4 equivalent, key selection criteria include sub-1.8-V operation capability, nanosecond-level timing margins, Ioff-enabled bus isolation, and compatibility with mixed-voltage 1.8-V/3.3-V system interfaces.
Technical Context
This device implements two independent edge-triggered D flip-flops sharing no internal logic; each responds solely to its dedicated CLK and D inputs, with Q outputs updated only on the rising edge of its respective clock. No internal reset/set or asynchronous control is present - all functionality is synchronous and level-sensitive only during setup/hold windows.
It features rail-to-rail input voltage tolerance (–0.5 V to 3.6 V), 3.6-V I/O tolerance enabling direct interfacing with higher-voltage logic, and robust ESD protection (2000-V HBM, 200-V MM, 1000-V CDM). The Ioff circuit actively disables outputs during power-down to prevent back-drive current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 0.8 V to 2.7 V - supports battery-powered systems down to single-cell Li-ion or coin-cell operation. |
| tpd (max) | 1.9 ns at 1.8 V - enables reliable operation in high-speed 250-MHz clock domains with margin. |
| Ioff Support | Active at VCC = 0 V - prevents current leakage between powered and unpowered sections in hot-swap or partial-shutdown systems. |
| Output Drive | ±8 mA at 1.8 V - sufficient to drive 15-pF loads across PCB traces without external buffering. |
| Input Voltage Range | –0.5 V to 3.6 V - allows safe interfacing with 3.3-V or 2.5-V drivers while powered at 1.8 V. |
| ESD Rating | 2000-V HBM - meets industrial-grade handling requirements without additional protection circuitry. |
Pinout & Package
VSSOP (DCU) 8-pin package: 2.3 mm × 2.0 mm body, 0.5-mm lead pitch, 0.9-mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1CLK | Positive-edge clock input for first flip-flop - triggers Q update only on rising transition. |
| 2 | 1D | Data input for first flip-flop - sampled at 1CLK↑ if setup/hold times are met. |
| 3 | 1Q | Non-inverted output of first flip-flop - retains state until next 1CLK↑ event. |
| 4 | GND | Ground reference for both flip-flops and internal bias networks. |
| 5 | 2Q | Non-inverted output of second flip-flop - independent of first section's timing. |
| 6 | 2D | Data input for second flip-flop - operates synchronously with 2CLK, not shared with 1CLK. |
| 7 | 2CLK | Positive-edge clock input for second flip-flop - fully isolated timing domain. |
| 8 | VCC | Supply voltage input - powers both flip-flops; Ioff remains active even when VCC = 0 V. |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Dies-as-package construction reduces footprint to 2.3 mm × 2.0 mm - ideal for space-constrained portable PCBs. |
| Sub-1-V operability | Functional at 0.8 V VCC - enables integration into ultra-low-power always-on subsystems. |
| 3.6-V I/O tolerance | Accepts 3.3-V inputs while powered at 1.8 V - eliminates level-shifters in mixed-voltage signal paths. |
| Low ICC (10 µA max) | Minimizes quiescent current in battery-backed retention circuits and sleep-mode logic. |
| Latch-up immunity | Exceeds 100 mA per JESD 78 Class II - ensures robustness in noisy industrial environments. |
Applications
| Mobile Baseband Interface | USB 2.0 PHY Control Logic |
|---|---|
|
Use Scenario: Synchronizing control signals between 1.8-V baseband processor and 3.3-V RF transceiver. IC Role / Device Role / Timing Role: Dual DFF provides independent clock-domain crossing for TXEN and RXEN lines using local clocks. Use Value: Eliminates metastability risk with guaranteed 0.5-ns hold time and 0.6-ns setup at 1.8 V, while tolerating 3.3-V input swings. |
Use Scenario: Latching USB suspend/resume handshake states in portable host controllers. IC Role / Device Role / Timing Role: One flip-flop captures bus activity flag; second holds wake-enable assertion until system exit from suspend. Use Value: Ioff prevents back-current from 3.3-V USB VBUS into 1.2-V suspend-rail logic during power-gated states. |
| Low-Power Sensor Hub | Industrial PLC I/O Module |
|
Use Scenario: Debouncing and edge-detection of MEMS sensor interrupt outputs before MCU wake-up. IC Role / Device Role / Timing Role: First DFF samples raw INT signal; second stages synchronized output to avoid spurious wake events. Use Value: 1.9-ns tpd ensures clean sampling of >200-MHz interrupt bursts; 10-µA ICC extends battery life in always-listening mode. |
Use Scenario: Isolating field-side digital inputs from controller-side logic during partial system maintenance. IC Role / Device Role / Timing Role: Flip-flops buffer status bits from optocoupled inputs, with Ioff disabling outputs when controller rail is off. Use Value: Prevents fault current injection into powered-down microcontroller I/O pins - critical for SIL-2 functional safety compliance. |
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 |
|---|---|---|---|
| SN74LVC2G74DCUR | Higher VCC min (1.65 V), slower tpd (3.2 ns @ 3.3 V), no sub-1-V operation. | Suitable only for 3.3-V-only systems; lacks Ioff and 3.6-V I/O tolerance. | Select when cost sensitivity outweighs ultra-low-voltage or mixed-voltage needs. |
| 74AUP2G79GS,115 | Lower ICC (0.9 µA), wider VCC range (0.8–3.6 V), but 2.5 ns tpd @ 1.8 V and no 3.6-V I/O rating. | Better for ultra-low-power always-on monitoring; unsuitable for driving 3.3-V loads directly. | Prefer for energy-harvesting nodes where timing margin exceeds 2.5 ns; verify I/O voltage compatibility. |
Compared with SN74AUC2G79DCURE4, SN74LVC2G74DCUR trades sub-1-V operation and Ioff for lower unit cost in fixed 3.3-V designs, while 74AUP2G79GS,115 improves static power by 90% but sacrifices output drive strength and mixed-voltage interoperability.
Availability
SN74AUC2G79DCURE4 is available at Aetrix Electronics and suitable for mobile baseband interfaces, USB 2.0 PHY control logic, low-power sensor hubs, and industrial PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for SN74AUC2G79DCURE4 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 connectivity technologies, with over 50 years of innovation in high-reliability logic and interface solutions.
The SN74AUC family targets ultra-high-speed, low-voltage logic applications demanding nanosecond timing precision and mixed-voltage interoperability in portable and industrial systems.
FAQ
What is the minimum supply voltage at which SN74AUC2G79DCURE4 guarantees functional operation?
SN74AUC2G79DCURE4 is fully specified down to 0.8 V VCC per TI SCES536C datasheet Section 6.2. At this voltage, it maintains valid setup/hold timing (tsu = 1.6 ns, th = 0 ns) and output drive (IOL = 0.7 mA), enabling use in single-cell lithium or energy-harvesting systems where SN74AUC2G79DCURE4 must operate below 1.0 V.
Does SN74AUC2G79DCURE4 support true bidirectional signal isolation during power-down?
Yes. SN74AUC2G79DCURE4 implements Ioff circuitry that actively disables all outputs when VCC = 0 V, preventing current flow from live 3.3-V buses into unpowered logic rails. This meets JESD 78 Class II latch-up immunity and is validated per TI's partial power-down test methodology in the SN74AUC2G79DCURE4 datasheet Section 7.3.
Can SN74AUC2G79DCURE4 safely interface with 3.3-V CMOS drivers while powered at 1.8 V?
Yes. SN74AUC2G79DCURE4 has a guaranteed input voltage range of –0.5 V to 3.6 V (Section 6.1), and its 3.6-V I/O tolerance is explicitly documented in the Features section. When SN74AUC2G79DCURE4 operates at 1.8 V, it correctly interprets 3.3-V logic-high signals without damage or level-shifting circuitry.
What is the maximum clock frequency supported by SN74AUC2G79DCURE4 at 1.8 V VCC?
At 1.8 V VCC with CL = 15 pF, SN74AUC2G79DCURE4 supports up to 250 MHz clock frequency (Section 7.5, Table 2). This is derived from fmax = 1/tpd_min, where minimum propagation delay is 0.3 ns - confirmed by TI's switching characteristics data under recommended operating conditions.
Is SN74AUC2G79DCURE4 pin-compatible with other members of the SN74AUC2Gxx dual logic family?
No. SN74AUC2G79DCURE4 uses a dedicated pinout optimized for dual DFF functionality (1CLK/1D/1Q/2Q/2D/2CLK), differing from SN74AUC2G86 (XOR), SN74AUC2G08 (AND), or SN74AUC2G125 (buffer). Pin mapping is unique to function - SN74AUC2G79DCURE4 cannot be substituted without PCB layout revision.
SN74AUC2G79DCURE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 275 MHz
- Max Propagation Delay @ V, Max CL:
- 1.8ns @ 2.5V, 30pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 9mA, 9mA
- Voltage - Supply:
- 0.8V ~ 2.7V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 2.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
SN74AUC2G79DCURE4 FAQ
1.How can I place an order for SN74AUC2G79DCURE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC2G79DCURE4 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 SN74AUC2G79DCURE4 reliable?
The price and inventory of SN74AUC2G79DCURE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC2G79DCURE4 is usually 5 days.
3.What payment methods are accepted for SN74AUC2G79DCURE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUC2G79DCURE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AUC2G79DCURE4?
SN74AUC2G79DCURE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUC2G79DCURE4 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 SN74AUC2G79DCURE4?
For technical support, including SN74AUC2G79DCURE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC2G79DCURE4 requirements.
6.How does Aetrix verify that SN74AUC2G79DCURE4 is sourced from the original manufacturer or authorized distributors?
All SN74AUC2G79DCURE4 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 SN74AUC2G79DCURE4 meets industry standards.
7.What is the process for return or replacement of SN74AUC2G79DCURE4?
All SN74AUC2G79DCURE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC2G79DCURE4, 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 SN74AUC2G79DCURE4 part is unused and in its original packaging.
Return procedure for SN74AUC2G79DCURE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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