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Texas Instruments SN74AUC2G79DCTR
- Part No.:
- SN74AUC2G79DCTR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
- Datasheet:
-
SN74AUC2G79DCTR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT SM8
- Quantity:
- Payment:
- Shipping:
Inventory:1,073
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Product details
Overview
SN74AUC2G79DCTR from Texas Instruments is a dual positive-edge-triggered D-type flip-flop in SSOP-8 (DCT) 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 logic interfaces.
For engineers reviewing the SN74AUC2G79DCTR datasheet, SN74AUC2G79DCTR pinout, SN74AUC2G79DCTR application, or SN74AUC2G79DCTR equivalent, key selection criteria include sub-2 ns tpd at 1.8 V, 10-µA max ICC, 3.6-V I/O tolerance for mixed-mode signal interfacing, and verified Ioff behavior enabling safe bus isolation during power sequencing.
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 non-inverting Q outputs. Clock triggering occurs at voltage threshold, not dependent on input slew rate, supporting reliable operation across 0.8–2.7 V supply range.
It features true Ioff circuitry that disables both outputs when VCC = 0 V, preventing back-drive current into powered-down sections. Input thresholds scale with VCC (VIH = 0.65×VCC, VIL = 0.35×VCC), ensuring robust noise margins across 1.1–1.95 V nominal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 0.8 V to 2.7 V - enables direct interface with 0.9-V, 1.2-V, 1.5-V, and 1.8-V logic domains |
| tpd (max) | 1.9 ns at 1.8 V - supports >250 MHz clock rates in high-speed data capture paths |
| Ioff Support | Active at VCC = 0 V - allows safe insertion into live buses without damaging current flow |
| Output Drive | ±8 mA at 1.8 V - sufficient to drive 15-pF loads with <1 ns transition times |
| ICC (max) | 10 µA - enables ultra-low static power in battery-backed or always-on logic blocks |
| I/O Voltage Tolerance | 3.6 V - permits connection to higher-voltage peripherals without level shifters |
| tsu / th | 0.6 ns / 0 ns at 1.8 V - minimal setup/hold windows simplify timing closure in tight layouts |
Pinout & Package
SSOP-8 (DCT) package, 3.0 mm × 4.4 mm body, 1.3 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input - must be decoupled locally; powers both flip-flop channels |
| 2 | 1CLK | Clock input for first DFF - rising edge triggers data capture from 1D to 1Q |
| 3 | 1D | Data input for first DFF - sampled only on active 1CLK edge |
| 4 | GND | Digital ground reference - shared return path for all internal logic and outputs |
| 5 | 2CLK | Clock input for second DFF - independent timing control from 1CLK |
| 6 | 2D | Data input for second DFF - isolated signal path with no crosstalk to first channel |
| 7 | 2Q | Non-inverting output of second DFF - matches 2D state after 2CLK↑ |
| 8 | 1Q | Non-inverting output of first DFF - matches 1D state after 1CLK↑ |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Die-as-package construction eliminates bond wires and mold compound - reduces parasitic inductance for cleaner signal integrity |
| Sub-1-V operability | Functional down to 0.8 V VCC - supports emerging ultra-low-power microcontroller I/O domains |
| 3.6-V I/O tolerance | Inputs and outputs withstand 3.6 V regardless of VCC - eliminates external level translators in mixed-supply systems |
| Latch-up immunity | Exceeds 100 mA per JESD 78 Class II - ensures robustness against transient overvoltage events |
| ESD protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade handling requirements without additional protection circuitry |
Applications
| High-Speed Data Capture | Low-Power Sensor Interface |
|---|---|
Use Scenario: Capturing asynchronous sensor data (e.g., ADC output bursts) into a synchronous processor domain using a clean system clock. IC Role / Device Role / Timing Role: Dual DFF acts as a 2-bit synchronizer stage, eliminating metastability risk between clock domains via double-sampling. Use Value: 1.9 ns tpd and 0 ns hold time enable reliable sampling at >250 MHz clock rates while maintaining <1 ns skew between channels. | Use Scenario: Latching wake-up event flags from ultra-low-power sensors (e.g., motion or environmental monitors) before MCU deep-sleep entry. IC Role / Device Role / Timing Role: Edge-triggered storage element holding interrupt status until MCU powers up and reads 1Q/2Q outputs. Use Value: 10 µA max ICC and Ioff support allow continuous monitoring with near-zero standby current and safe isolation during MCU power-off. |
| Mixed-Voltage Bus Isolation | Portable Logic-Level Translation |
Use Scenario: Isolating a 1.8-V FPGA I/O bank from a 3.3-V peripheral bus during FPGA configuration or reset sequences. IC Role / Device Role / Timing Role: Bidirectional data latch enabling controlled handshaking between voltage domains without level shifters. Use Value: 3.6-V I/O tolerance and Ioff ensure no back-current flows into unpowered FPGA pins, meeting JEDEC JESD78 latch-up safety requirements. | Use Scenario: Interfacing a 0.8-V AI accelerator core with 1.2-V memory controller in compact wearable devices. IC Role / Device Role / Timing Role: Voltage-scalable DFF providing timing-critical data staging between disparate logic families. Use Value: Sub-1-V operation and 0.6 ns setup time allow direct integration without intermediate regulators or translators, reducing BOM count and board area. |
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 |
|---|---|---|---|
| SN74LVC2G79DCTR | Higher VCC min (1.65 V), slower tpd (2.5 ns @ 3.3 V), no sub-1-V operation | Suitable for 3.3-V/2.5-V legacy systems but incompatible with 0.8–1.2-V domains | Select when full 3.3-V compatibility and higher drive strength (24 mA) outweigh low-voltage needs. |
| 74AUP2G79GM,115 | Lower ICC (5 µA), wider VCC range (0.8–3.6 V), same 1.9 ns tpd at 1.8 V, different pinout (XSON-8) | Requires PCB redesign due to XSON-8 footprint; better for space-constrained designs needing lowest quiescent power | Choose when board real estate is critical and layout change is acceptable for 50% lower ICC. |
Compared with SN74AUC2G79DCTR, SN74LVC2G79DCTR trades sub-1-V capability for broader 3.3-V interoperability, while 74AUP2G79GM,115 delivers lower ICC and identical speed in a smaller package - requiring layout revision but offering superior power efficiency in miniaturized systems.
Availability
SN74AUC2G79DCTR is available at Aetrix Electronics and suitable for high-speed data capture, low-power sensor interface, mixed-voltage bus isolation, and portable logic-level translation requiring stable component supply and long-term production continuity.
Supply support for SN74AUC2G79DCTR 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 decades of expertise in high-performance, low-power digital IC design.
The SN74AUC family targets ultra-high-speed, low-voltage logic applications demanding sub-2 ns propagation delay and robust mixed-signal interoperability - optimized for portable, battery-powered, and space-constrained electronics.
FAQ
What is the minimum supply voltage at which SN74AUC2G79DCTR guarantees functional operation?
SN74AUC2G79DCTR guarantees functional operation down to 0.8 V VCC across the full –40°C to 85°C temperature range, with timing parameters fully characterized at 0.8 V, 1.2 V, 1.5 V, 1.8 V, and 2.5 V. Below 0.8 V, behavior is not specified and may result in unreliable clocking or output states. The device is specifically optimized for 1.65–1.95 V operation but maintains full functionality at the 0.8-V floor.
Does SN74AUC2G79DCTR support hot-insertion or live-board replacement?
Yes, SN74AUC2G79DCTR supports hot-insertion via its Ioff feature: when VCC = 0 V, the outputs enter high-impedance state and block current flow from live I/O lines, preventing damage to upstream or downstream components. This behavior is tested per JESD 78 Class II and confirmed across 0–3.6 V I/O voltage range, making SN74AUC2G79DCTR suitable for modular backplane or field-replaceable unit designs.
Can SN74AUC2G79DCTR safely interface between a 1.8-V microcontroller and a 3.3-V UART transceiver?
Yes, SN74AUC2G79DCTR can safely interface those domains: its I/O pins tolerate up to 3.6 V regardless of VCC level, and its 1.8-V VCC supplies logic compatible with the microcontroller while presenting 3.3-V-tolerant outputs to the UART. No external level shifter is required, provided the UART's input thresholds are met - verified by SN74AUC2G79DCTR's VOH ≥ 1.8 V and VOL ≤ 0.6 V at 1.8 V VCC driving 8-mA loads.
What is the maximum clock frequency supported by SN74AUC2G79DCTR at 1.8 V VCC?
At 1.8 V VCC with CL = 15 pF, SN74AUC2G79DCTR supports a maximum clock frequency (fmax) of 250 MHz, derived from its 1.9 ns max tpd and validated timing margins. With CL = 30 pF, fmax remains 250 MHz per datasheet Table 6. This enables use in DDR source-synchronous interfaces, high-resolution timer capture, and real-time protocol bridging where deterministic edge-to-edge latency is critical.
Is the pinout of SN74AUC2G79DCTR compatible with other dual D-type flip-flops in SSOP-8 packages?
SN74AUC2G79DCTR uses a standard dual DFF pinout (VCC–1CLK–1D–GND–2CLK–2D–2Q–1Q) consistent with industry conventions for 2-channel edge-triggered logic in 8-pin SSOP. It matches the pinout of SN74LVC2G79DCTR and 74AUP2G79 variants in DCT package, enabling drop-in replacement where electrical specs align - though voltage range and timing differences must be verified per application.
SN74AUC2G79DCTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- Package/Case:
- 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SM8
SN74AUC2G79DCTR FAQ
1.How can I place an order for SN74AUC2G79DCTR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC2G79DCTR 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 SN74AUC2G79DCTR reliable?
The price and inventory of SN74AUC2G79DCTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC2G79DCTR is usually 5 days.
3.What payment methods are accepted for SN74AUC2G79DCTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUC2G79DCTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AUC2G79DCTR?
SN74AUC2G79DCTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUC2G79DCTR 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 SN74AUC2G79DCTR?
For technical support, including SN74AUC2G79DCTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC2G79DCTR requirements.
6.How does Aetrix verify that SN74AUC2G79DCTR is sourced from the original manufacturer or authorized distributors?
All SN74AUC2G79DCTR 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 SN74AUC2G79DCTR meets industry standards.
7.What is the process for return or replacement of SN74AUC2G79DCTR?
All SN74AUC2G79DCTR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC2G79DCTR, 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 SN74AUC2G79DCTR part is unused and in its original packaging.
Return procedure for SN74AUC2G79DCTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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