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Texas Instruments SN74LVC2G79YEPR
- Part No.:
- SN74LVC2G79YEPR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
SN74LVC2G79YEPR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SN74LVC2G79YEPR from Texas Instruments is a dual positive-edge-triggered D-type flip-flop in an 8-pin NanoFree™ WCSP (YEP) package, operating from 1.65 V to 5.5 V, with 4.2 ns max propagation delay at 3.3 V and ±24-mA output drive - used for synchronous data latching in space-constrained portable logic interfaces.
For engineers reviewing the SN74LVC2G79YEPR datasheet, SN74LVC2G79YEPR pinout, SN74LVC2G79YEPR application, or SN74LVC2G79YEPR equivalent, key selection criteria include Ioff partial-power-down support, 10-µA max ICC, 160-MHz max clock frequency, and Pb-free SnPb solder-bump composition per YEP marking convention.
Technical Context
This device implements two independent edge-triggered D flip-flops sharing no internal logic; each transfers data from D to Q on the rising edge of its dedicated clock (1CLK/2CLK), with setup/hold times as low as 0.9 ns at 3.3 V. Inputs tolerate up to 5.5 V regardless of VCC, enabling mixed-voltage interfacing.
The Ioff circuitry actively disables outputs during power-down, blocking current backflow when VCC = 0 V. Output ground bounce (VOLP) remains below 0.8 V and VOH undershoot exceeds 2 V at 3.3 V, ensuring signal integrity in high-speed PCB routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - supports single-supply operation 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 - enables reliable 160-MHz clock operation with timing margin in compact digital systems. |
| Ioff Support | Active Ioff circuitry - prevents damaging back-current when VCC is unpowered, critical for hot-swap and multi-rail systems. |
| Output Drive | ±24 mA at VCC = 3.3 V - drives standard CMOS loads without external buffers in battery-powered IoT nodes. |
| Input Voltage Tolerance | Up to 5.5 V on all inputs - allows direct connection to 5-V controllers without level shifters. |
| ICC (max) | 10 µA - minimizes quiescent power in always-on sensor interface circuits. |
| ESD Rating | 2000-V HBM - meets industrial-grade robustness requirements for handheld and field-deployable equipment. |
Pinout & Package
NanoFree™ WCSP (YEP) 8-ball die-size package (0.87 mm × 0.97 mm, 0.4-mm pitch), Pb-free SnPb solder bumps, bottom-side marked with year/month/sequence + assembly site identifier; pin 1 identified by • (Pb-free) or 1 (SnPb).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLK | Clock input for first flip-flop | Rising-edge sensitive; triggers data capture from 1D to 1Q independently of second channel. |
| 1D | Data input for first flip-flop | Samples on 1CLK↑; must meet 0.9-ns setup/0.5-ns hold at 3.3 V for 160-MHz operation. |
| 2Q | True output for second flip-flop | Active-high, non-inverting output; driven to VCC or GND with ±24-mA capability at 3.3 V. |
| GND | Ground reference | Common return path for both flip-flops; requires low-inductance local decoupling due to fast edge rates. |
| VCC | Power supply | Supplies both channels; supports 1.65–5.5 V; bypassing with 100-nF ceramic essential for VOLP control. |
| 1Q | True output for first flip-flop | Matches 2Q electrical specs; enables dual-channel synchronous storage without shared timing constraints. |
| 2D | Data input for second flip-flop | Independent of 1D; allows two asynchronous data streams to be edge-aligned to separate clocks. |
| 2CLK | Clock input for second flip-flop | Electrically isolated from 1CLK; permits independent clock domain synchronization in multi-clock SoC interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ WCSP packaging | Die-as-package construction reduces footprint to 0.84 mm² - ideal for ultra-thin wearables and implantable medical sensors. |
| Ioff partial-power-down | Outputs enter high-impedance state when VCC = 0 V, eliminating backfeed risk in modular subsystems with staggered power sequencing. |
| 5.5-V tolerant inputs | Eliminates need for external level translators when interfacing with legacy 5-V microcontrollers or FPGAs. |
| Low ground bounce (VOLP < 0.8 V) | Maintains signal fidelity in dense layouts with shared ground planes, reducing need for guard traces or split grounds. |
| 160-MHz max clock frequency | Supports high-throughput data serialization in USB 2.0 PHY handshaking and MIPI I3C auxiliary timing paths. |
Applications
| Portable Sensor Hub Interface | Low-Power Wearable Synchronization |
|---|---|
Use Scenario: Synchronizing accelerometer and gyroscope data streams into a microcontroller's DMA buffer using independent clock domains. IC Role / Device Role / Timing Role: Dual DFF provides isolated edge-triggered capture for two asynchronous sensor clocks, aligning samples to a common system timebase. Use Value: Eliminates software-based sampling alignment, reducing CPU load by 35% and jitter below 1 ns in clinical-grade motion tracking. |
Use Scenario: Latching button-press events and ambient light sensor interrupts before MCU wake-up in a smartwatch with sub-10-µA sleep current. IC Role / Device Role / Timing Role: Edge-triggered storage holds interrupt state during deep-sleep; Ioff prevents leakage through unpowered MCU GPIOs. Use Value: Enables true zero-power event capture with no external pull-ups or power-gating circuitry, extending battery life by 22%. |
| Industrial PLC I/O Expansion | Automotive Body Control Module |
Use Scenario: Isolating 24-V digital input signals via optocouplers, then synchronizing to a 3.3-V FPGA fabric clock domain. IC Role / Device Role / Timing Role: Input-stage DFF removes metastability risk from asynchronous opto-output transitions before FPGA register stages. Use Value: Achieves MTBF > 10⁹ hours in safety-critical discrete I/O modules without requiring triple-module redundancy. |
Use Scenario: Debouncing door-lock actuator feedback signals and window position sensor pulses in a 12-V vehicle electrical architecture. IC Role / Device Role / Timing Role: Positive-edge latch captures clean, glitch-free status edges from noisy harness environments under load dump conditions. Use Value: Reduces false-trigger rate to <1 ppm over 15-year service life, meeting ISO 16750-2 pulse test compliance without external RC filters. |
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 |
|---|---|---|---|
| SN74LVC2G79YZPR | Same silicon, NanoFree™ WCSP with SnAgCu bumps (RoHS-compliant); identical timing, drive, and Ioff behavior. | Required where Pb-free assembly and J-STD-020 MSL Level-1 compliance are mandated for automotive AEC-Q200 qualification. | Select YZPR for new designs targeting RoHS/REACH conformance and long-term TI production support (YZPR is ACTIVE; YEPR is NRND). |
| SN74LVC2G79DCUR | VSSOP-8 (DCU) package: 2.1-mm × 2.0-mm body, 0.5-mm pitch; 227°C/W θJA vs. YEP's 102°C/W; otherwise identical electrical specs. | Better suited for manual rework, thermal monitoring, or prototyping where WCSP handling infrastructure is unavailable. | Choose DCUR for lab validation, small-batch builds, or designs requiring optical inspection access to solder joints. |
Compared with SN74LVC2G79YEPR, SN74LVC2G79YZPR offers full RoHS compliance and active production status, while SN74LVC2G79DCUR trades minimal size advantage for assembly flexibility and thermal visibility - neither is pin-compatible due to differing package geometries (WCSP vs VSSOP), requiring PCB redesign.
Availability
SN74LVC2G79YEPR is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, and automotive body electronics requiring stable component supply despite its NRND status.
Supply support for SN74LVC2G79YEPR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The SN74LVC2G79 belongs to TI's LVC logic family, engineered for low-voltage, high-speed operation in space-constrained portable and battery-powered systems with stringent power and ESD requirements.
FAQ
What is the package type and mounting orientation of SN74LVC2G79YEPR?
SN74LVC2G79YEPR uses a NanoFree™ WCSP (YEP) package - an 8-ball, bottom-terminal chip-scale package with 0.4-mm pitch and Pb-free SnPb solder bumps. It is mounted with the die side down (bottom view), where pin 1 is identified by a • (Pb-free) or 1 (SnPb) marking adjacent to ball A1. The package measures 0.87 mm × 0.97 mm and requires micro-vision alignment and controlled-collapse chip connection (C4) reflow profiles.
Does SN74LVC2G79YEPR support partial power-down, and how is it implemented?
Yes, SN74LVC2G79YEPR implements Ioff circuitry that disables all outputs when VCC = 0 V, preventing current backflow from live inputs into the unpowered device. This feature is intrinsic to the silicon design and requires no external enable/disable control. For SN74LVC2G79YEPR, Ioff leakage remains ≤±1 µA across –40°C to 85°C, making it suitable for hot-plug interfaces and multi-rail power architectures where subsystems power up/down asynchronously.
What is the maximum clock frequency and associated timing margin for SN74LVC2G79YEPR at 3.3 V?
At VCC = 3.3 V, SN74LVC2G79YEPR supports a maximum clock frequency of 160 MHz, with a minimum pulse width (tw) of 2.5 ns for both high and low clock states. Its typical propagation delay (tpd) is 1.3 ns, and worst-case tpd is 4.2 ns - providing ≥2.3 ns of timing margin between clock edge and output valid window under worst-case process/voltage/temperature conditions, sufficient for robust operation in 100-MHz+ data acquisition pipelines.
Can SN74LVC2G79YEPR interface directly with 5-V logic systems?
Yes, SN74LVC2G79YEPR accepts input voltages up to 5.5 V on all pins regardless of VCC level (1.65–5.5 V), enabling direct connection to 5-V microcontrollers, FPGAs, or legacy peripherals without level-shifting circuitry. Its inputs are TTL-compatible and 5-V tolerant, while outputs swing rail-to-rail (0 V to VCC), so interfacing to 5-V loads requires either a pull-up to 5 V (with current limiting) or use of the device in a 5-V VCC configuration - which is fully supported per datasheet.
Why is SN74LVC2G79YEPR marked as NRND, and what does that mean for long-term procurement?
SN74LVC2G79YEPR is designated NRND (Not Recommended for New Designs) by Texas Instruments because the YEP variant uses SnPb bumps and has been superseded by the RoHS-compliant SN74LVC2G79YZPR (SnAgCu). TI continues manufacturing SN74LVC2G79YEPR to support existing customer designs but advises new projects to adopt YZPR. Aetrix Electronics maintains active inventory and offers lifetime buy planning, last-time-buy coordination, and cross-reference support to ensure continuity for legacy SN74LVC2G79YEPR-based systems.
SN74LVC2G79YEPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-XFBGA, DSBGA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA (1.9x0.9)
SN74LVC2G79YEPR FAQ
1.How can I place an order for SN74LVC2G79YEPR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2G79YEPR 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 SN74LVC2G79YEPR reliable?
The price and inventory of SN74LVC2G79YEPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2G79YEPR is usually 5 days.
3.What payment methods are accepted for SN74LVC2G79YEPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2G79YEPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2G79YEPR?
SN74LVC2G79YEPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2G79YEPR 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 SN74LVC2G79YEPR?
For technical support, including SN74LVC2G79YEPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2G79YEPR requirements.
6.How does Aetrix verify that SN74LVC2G79YEPR is sourced from the original manufacturer or authorized distributors?
All SN74LVC2G79YEPR 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 SN74LVC2G79YEPR meets industry standards.
7.What is the process for return or replacement of SN74LVC2G79YEPR?
All SN74LVC2G79YEPR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2G79YEPR, 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 SN74LVC2G79YEPR part is unused and in its original packaging.
Return procedure for SN74LVC2G79YEPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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