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Texas Instruments SN74LVC2G79DCUR
- Part No.:
- SN74LVC2G79DCUR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
SN74LVC2G79DCUR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,225
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Product details
Overview
SN74LVC2G79DCUR from Texas Instruments is a dual positive-edge-triggered D-type flip-flop in an 8-pin VSSOP (DCU) package, supporting 1.65-V to 5.5-V operation with 4.2 ns max propagation delay at 3.3 V, ±24-mA output drive, and Ioff support for live insertion-used in clock-synchronized data latching in portable logic interfaces and level-shifting control paths.
For engineers reviewing the SN74LVC2G79DCUR datasheet, SN74LVC2G79DCUR pinout, SN74LVC2G79DCUR application, or SN74LVC2G79DCUR equivalent, key selection considerations include VCC range compatibility (1.65–5.5 V), dual-channel edge-triggered storage behavior, low-power static current (10 μA max), and NanoFree™ packaging for space-constrained PCB layouts.
Technical Context
This device implements two independent D-type flip-flops, each triggered on the rising edge of its dedicated clock input (1CLK, 2CLK), with non-inverting Q outputs and direct D inputs. Each channel operates synchronously without internal gating or reset/set controls.
It features Ioff circuitry that disables outputs during power-down to prevent back-drive current, supports mixed-voltage interfacing (inputs tolerate up to 5.5 V regardless of VCC), and meets JESD 78 Class II latch-up and JESD 22 ESD specifications (2000-V HBM, 200-V MM, 1000-V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - enables interoperability across 1.8-V, 2.5-V, 3.3-V, and 5-V logic domains |
| tpd (max) | 4.2 ns at VCC = 3.3 V - supports >160-MHz clock operation with timing margin |
| Output Drive | ±24 mA at VCC = 3.3 V - drives standard CMOS loads and short traces without buffering |
| ICC (max) | 10 μA - ensures ultra-low quiescent power in battery-powered or always-on subsystems |
| Ioff | ±10 μA at VCC = 0 V - blocks current flow during partial power-down, enabling hot-plug capability |
| Input Voltage Tolerance | Up to 5.5 V - allows 5-V-tolerant inputs even when VCC = 1.8 V, simplifying voltage translation |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
The SN74LVC2G79DCUR uses an 8-pin Very Small Outline Package (VSSOP, DCU), 2.0 mm × 1.25 mm body size, 0.5-mm lead pitch, and exposed pad not connected internally. Pin 1 is marked by a beveled corner or dot; orientation follows JEDEC MO-187 variation CA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply rail - must be decoupled locally; powers both flip-flop channels |
| 2 | 1D | Data input for first flip-flop - sampled on rising edge of 1CLK |
| 3 | 1Q | Non-inverting output of first flip-flop - reflects 1D state after 1CLK↑ |
| 4 | GND | Ground reference - shared return path for all signals and supply currents |
| 5 | 2CLK | Clock input for second flip-flop - rising edge triggers 2D→2Q transfer |
| 6 | 2Q | Non-inverting output of second flip-flop - stable until next 2CLK↑ |
| 7 | 2D | Data input for second flip-flop - independent of first channel's timing |
| 8 | 1CLK | Clock input for first flip-flop - isolated timing control per channel |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Die-as-package construction reduces footprint to 2.0 mm × 1.25 mm - eliminates bond wires and mold compound for minimal parasitic inductance |
| 5-V tolerant inputs | VI up to 5.5 V regardless of VCC - enables direct interface with legacy 5-V peripherals without external level shifters |
| Ioff partial-power-down | Outputs enter high-impedance state when VCC = 0 V - prevents back-current damage during board hot-swap or staged power sequencing |
| Low ground bounce (VOLP) | Typical <0.8 V at VCC = 3.3 V - minimizes noise coupling into shared GND planes in dense digital layouts |
| High noise immunity | VIH/VIL thresholds scale with VCC (e.g., VIH = 0.7×VCC at 4.5–5.5 V) - maintains robust logic margins across supply variations |
Applications
| Industrial PLC I/O Expansion | Portable Device Power Sequencing |
|---|---|
|
Use Scenario: Synchronizing asynchronous sensor data streams before feeding into a microcontroller's parallel input port. IC Role / Device Role / Timing Role: Dual-channel edge-triggered latch capturing two independent status bits on separate clock edges. Use Value: Eliminates metastability risk with setup/hold times as low as 0.9 ns (VCC = 5 V), enabling reliable sampling of fast GPIO toggles. |
Use Scenario: Controlling enable sequencing of multiple voltage rails (e.g., core, I/O, analog) in handheld medical instruments. IC Role / Device Role / Timing Role: Storing power-enable states synchronized to a system master clock for deterministic startup order. Use Value: Ioff protection prevents backfeed during partial power-down of one rail while others remain active, ensuring safe sequencing. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Debouncing and synchronizing mechanical switch inputs (e.g., door lock buttons) before CAN message generation. IC Role / Device Role / Timing Role: Positive-edge D flip-flop acting as synchronous input synchronizer with glitch-free output transitions. Use Value: –40°C to +125°C rating and latch-up immunity (>100 mA) ensure reliability in under-dash environments subject to thermal cycling. |
Use Scenario: Capturing and holding test pattern bits from a pattern generator before applying them to a DUT's control bus. IC Role / Device Role / Timing Role: Dual latch providing independent hold registers for address and command lines in automated test fixtures. Use Value: 4.2 ns tpd at 3.3 V enables sub-200 MHz pattern rates with deterministic timing alignment between parallel control signals. |
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 | Single D-type flip-flop with complementary Q and Q̅ outputs; no dual-channel integration | Requires two units to match SN74LVC2G79DCUR's dual independent channels | Select when complementary outputs or single-channel isolation is required over density |
| 74LVC2G80DCUR | Single D-type flip-flop with true Q output only; identical VCC range and speed but half the channel count | Not functionally equivalent - lacks second flip-flop; requires redesign for dual-latch use cases | Choose only if design uses only one latch and board area permits discrete duplication |
Compared with SN74LVC2G79DCUR, SN74LVC2G74DCUR provides Q/Q̅ pairs but doubles component count for dual-channel needs, while 74LVC2G80DCUR offers matching speed and voltage specs but cannot replace the dual-latch functionality without layout and BOM changes.
Availability
SN74LVC2G79DCUR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and portable medical device designs requiring stable component supply, extended temperature operation, and compact logic packaging.
Supply support for SN74LVC2G79DCUR 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 experience in high-reliability interface and timing ICs.
The SN74LVC2G79 belongs to TI's LVC logic family, designed for low-voltage, high-speed, mixed-signal interfacing in space- and power-constrained systems - emphasizing robustness, voltage flexibility, and small-footprint packaging.
FAQ
What is the maximum clock frequency supported by the SN74LVC2G79DCUR?
The SN74LVC2G79DCUR supports a maximum clock frequency of 160 MHz across its full operating voltage range (1.65 V to 5.5 V) and temperature range (–40°C to +125°C), verified under CL = 15 pF load conditions with timing margins maintained per datasheet switching characteristics.
Does the SN74LVC2G79DCUR support partial power-down operation?
Yes, the SN74LVC2G79DCUR includes Ioff circuitry that disables outputs when VCC = 0 V, limiting Ioff to ±10 μA. This feature prevents damaging current backflow during live insertion or staged power sequencing, making SN74LVC2G79DCUR suitable for hot-swap applications.
What package type is used for the SN74LVC2G79DCUR?
The SN74LVC2G79DCUR uses an 8-pin VSSOP (Very Small Outline Package) with drawing code DCU, measuring 2.0 mm × 1.25 mm with 0.5-mm lead pitch. It complies with JEDEC MO-187 variation CA and features a beveled corner for Pin 1 identification.
Can the SN74LVC2G79DCUR interface with 5-V logic while operating at 1.8 V VCC?
Yes, the SN74LVC2G79DCUR accepts input voltages up to 5.5 V regardless of VCC level, allowing direct connection to 5-V signal sources even when powered at 1.8 V. This eliminates external level shifters in mixed-voltage systems using SN74LVC2G79DCUR.
Is there a version of the SN74LVC2G79DCUR with different marking or packaging?
Yes - SN74LVC2G79DCURG4.B is an orderable variant of the same device, sharing identical electrical specifications and DCU package, differing only in RoHS-compliant NIPDAU lead finish and part marking (C79R). Both are pin- and function-compatible replacements.
SN74LVC2G79DCUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm 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:
- 160 MHz
- Max Propagation Delay @ V, Max CL:
- 4.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Current - Quiescent (Iq):
- 5 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
SN74LVC2G79DCUR FAQ
1.How can I place an order for SN74LVC2G79DCUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2G79DCUR 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 SN74LVC2G79DCUR reliable?
The price and inventory of SN74LVC2G79DCUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2G79DCUR is usually 5 days.
3.What payment methods are accepted for SN74LVC2G79DCUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2G79DCUR transactions.
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4.How is shipping managed for SN74LVC2G79DCUR?
SN74LVC2G79DCUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2G79DCUR 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 SN74LVC2G79DCUR?
For technical support, including SN74LVC2G79DCUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2G79DCUR requirements.
6.How does Aetrix verify that SN74LVC2G79DCUR is sourced from the original manufacturer or authorized distributors?
All SN74LVC2G79DCUR 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 SN74LVC2G79DCUR meets industry standards.
7.What is the process for return or replacement of SN74LVC2G79DCUR?
All SN74LVC2G79DCUR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2G79DCUR, 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 SN74LVC2G79DCUR part is unused and in its original packaging.
Return procedure for SN74LVC2G79DCUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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