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Texas Instruments SN74LVC1G79QDCKTQ1
- Part No.:
- SN74LVC1G79QDCKTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LVC1G79QDCKTQ1.pdf
- Description:
- IC FF D-TYPE SNGL 1BIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:997
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Product details
Overview
SN74LVC1G79QDCKTQ1 from Texas Instruments is an AEC-Q100 qualified automotive single positive-edge-triggered D-type flip-flop operating from 1.65V to 5.5V VCC, with 6ns max propagation delay at 3.3V/50pF, ±24mA output drive, and Ioff support for partial-power-down mode - used for data latching and state retention in automotive infotainment and ADAS clock domains.
For engineers reviewing the SN74LVC1G79QDCKTQ1 datasheet, SN74LVC1G79QDCKTQ1 pinout, SN74LVC1G79QDCKTQ1 application, or SN74LVC1G79QDCKTQ1 equivalent, key selection criteria include automotive-grade timing reliability (–40°C to +125°C), over-voltage tolerant inputs (up to 5.5V), low ICC (≤10µA), and SC70-5 package compatibility with space-constrained body electronics PCBs.
Technical Context
The SN74LVC1G79QDCKTQ1 implements a synchronous edge-triggered storage element where data at the D input transfers to the non-inverted Q output on the rising edge of CLK, independent of clock rise time due to voltage-level triggering. Setup (1.2–2.6ns) and hold (0.3–1.0ns) times are specified across 1.65V–5.5V VCC and –40°C to +125°C.
It features standard CMOS inputs with Δt/Δv ≤10ns/V at 3.3V, balanced push-pull outputs capable of ±24mA at 3.3V, and Ioff circuitry that disables outputs during power-down to prevent back-drive current - enabling safe operation in hot-swap and multi-rail automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - supports direct interface with 1.8V, 2.5V, 3.3V, and 5V logic domains without level shifters |
| tpd Max | 6ns at 3.3V/50pF - enables reliable operation up to 160MHz clock frequency in high-speed control paths |
| IOH/IOL | ±24mA at 3.3V - drives moderate capacitive loads and multiple gate inputs without external buffers |
| ICC Max | 10µA - minimizes quiescent power in always-on vehicle modules such as body controllers |
| Operating Temp | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and cabin-mounted ECUs |
| Ioff | ±10µA - ensures output isolation during partial power-down, preventing back-current damage in mixed-supply systems |
| Input Voltage Range | 0V to 5.5V - allows interfacing with higher-voltage sensors or legacy 5V peripherals while powered from 3.3V |
Pinout & Package
SN74LVC1G79QDCKTQ1 uses the SC70-5 (DCK) package: 2.00mm × 1.25mm, 5-pin surface-mount, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - D | Data input | CMOS-compatible input accepting voltages up to 5.5V; must meet setup/hold timing relative to CLK↑ |
| 2 - CLK | Clock input | Positive-edge-triggered; voltage-level sensitive (not edge-rate dependent); requires minimum pulse width ≥2.5ns |
| 3 - GND | Ground reference | Return path for all internal logic and output currents; must be low-impedance to minimize ground bounce |
| 4 - Q | Non-inverted output | Push-pull CMOS output sourcing/sinking up to ±24mA; retains last valid state during VCC glitches down to 1.5V |
| 5 - VCC | Power supply | Supplies core logic and output drivers; requires local 0.1µF bypass capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use across –40°C to +125°C ambient, including thermal cycling and HTOL stress |
| Over-voltage tolerant inputs | Accepts 0V–5.5V signals regardless of VCC (1.65V–5.5V), eliminating need for external level translators |
| Ioff partial-power-down protection | Disables outputs when VCC = 0V, blocking back-drive current and protecting downstream circuits |
| Data retention at low VCC | Maintains Q output state during VCC dips to 1.5V - critical for glitch-tolerant latch applications in power-sensitive ECUs |
| Low dynamic power consumption | Cpd = 27pF at 3.3V enables <1mW typical active power at 10MHz, reducing thermal load in dense clusters |
Applications
| Automotive Infotainment | Automotive Cluster |
|---|---|
Use Scenario: Latching display enable signals from MCU GPIOs in head-unit mainboards subject to 12V battery transients. IC Role / Device Role / Timing Role: Positive-edge D flip-flop capturing stable logic states before display controller initialization. Use Value: Ensures deterministic output state during cold cranking (VCC dip to 1.5V), preventing display flicker or corruption. |
Use Scenario: Synchronizing backlight dimming commands between instrument cluster MCU and LED driver ICs. IC Role / Device Role / Timing Role: Edge-triggered storage element isolating timing-critical PWM control lines from software jitter. Use Value: Eliminates metastability risk in asynchronous domain crossings while supporting 160MHz max clock rate. |
| Automotive ADAS | Automotive Body Electronics |
Use Scenario: Capturing camera sensor frame sync pulses in surround-view systems with multi-source clock domains. IC Role / Device Role / Timing Role: Single-bit data register aligning asynchronous trigger edges to system clock for timestamping. Use Value: Provides sub-6ns propagation delay and 1.2ns min setup at 3.3V, enabling precise inter-frame timing alignment. |
Use Scenario: Holding door lock actuator enable states during gateway ECU sleep/wake transitions. IC Role / Device Role / Timing Role: Retentive latch maintaining output state through VCC brownouts and partial power cycles. Use Value: Guarantees fail-safe door lock position retention even during 12V battery sag below 9V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G79DCKRQ1 | Same silicon, SC70-5 package, but supplied in 3000-unit tape-and-reel vs. SN74LVC1G79QDCKTQ1's 250-unit reel | Identical electrical and thermal specs; optimized for high-volume production rather than prototyping or small-batch validation | Select SN74LVC1G79QDCKTQ1 for evaluation, pre-production builds, or low-MOQ design-in; use DCKRQ1 for full-scale manufacturing. |
| MC74LCX1G79DTT1G | ON Semiconductor part; AEC-Q100 qualified, same SC70-5 footprint, but max tpd = 7.5ns at 3.3V/50pF and IOH/IOL = ±24mA only at VCC ≥ 4.5V | Limited drive strength at 3.3V (±16mA), requiring derating in 3.3V systems; lower max clock frequency (125MHz) | Use only if TI supply chain constraints exist; verify timing margins in 3.3V designs due to slower propagation and reduced drive. |
Compared with SN74LVC1G79QDCKTQ1, SN74LVC1G79DCKRQ1 offers identical performance in volume packaging, while MC74LCX1G79DTT1G trades 1.5ns timing margin and 3.3V drive capability for second-source availability - making SN74LVC1G79QDCKTQ1 optimal for timing-critical, low-voltage automotive latching.
Availability
SN74LVC1G79QDCKTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor synchronization, and body electronics applications requiring stable component supply, AEC-Q100 compliance, and SC70-5 footprint consistency.
Supply support for SN74LVC1G79QDCKTQ1 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 specializing in analog, embedded processing, and automotive-grade logic solutions, with decades of automotive qualification expertise and broad AEC-Q100 portfolio coverage.
The SN74LVC1G79QDCKTQ1 belongs to TI's LVC logic family designed specifically for low-voltage, high-speed automotive signal conditioning - emphasizing robustness across wide temperature ranges, Ioff safety, and seamless voltage-domain interoperability.
FAQ
What is the maximum clock frequency supported by SN74LVC1G79QDCKTQ1?
The SN74LVC1G79QDCKTQ1 supports a maximum clock frequency of 160MHz across its full operating range (–40°C to +125°C, VCC = 1.65V to 5.5V), as verified by timing requirements in Section 5.6 and 5.7 of the datasheet. This applies to both CL = 15pF and CL = 50pF loads, with propagation delay remaining within specification up to this rate. The 160MHz limit is maintained regardless of VCC level within the recommended range.
Does SN74LVC1G79QDCKTQ1 support operation at 1.8V VCC?
Yes, SN74LVC1G79QDCKTQ1 is fully specified for 1.8V VCC operation per Recommended Operating Conditions (Section 5.3), with guaranteed timing (tsu = 2.2ns, tpd = 9.1ns max at CL = 15pF), output drive (±4mA), and logic thresholds. It also supports data retention down to VCC = 1.5V, making it suitable for low-power automotive subsystems powered from 1.8V rails.
How does the Ioff feature function in SN74LVC1G79QDCKTQ1?
The Ioff circuitry in SN74LVC1G79QDCKTQ1 automatically places all outputs in a high-impedance state when VCC = 0V, limiting leakage current to ±10µA (Section 5.5). This prevents back-drive current from other powered sections of the system into the unpowered SN74LVC1G79QDCKTQ1, protecting both the device and connected circuitry - a critical requirement for automotive partial-power-down architectures.
Can SN74LVC1G79QDCKTQ1 accept 5V input signals while operating at 3.3V VCC?
Yes, SN74LVC1G79QDCKTQ1 has over-voltage tolerant inputs rated to 5.5V regardless of VCC level (Section 5.3), allowing 5V signals to be applied directly to D and CLK pins when VCC = 3.3V. This eliminates external level-shifting components in mixed-voltage automotive systems, simplifying design and improving signal integrity in infotainment and cluster interfaces.
What is the thermal resistance (RθJA) of SN74LVC1G79QDCKTQ1 in its SC70-5 package?
The junction-to-ambient thermal resistance (RθJA) of SN74LVC1G79QDCKTQ1 in the SC70-5 (DCK) package is 371°C/W (Section 5.4). This value assumes standard JEDEC test board conditions; actual board-level thermal performance depends on copper area, via count, and airflow. For continuous operation at 125°C ambient, power dissipation should remain below ~60mW to maintain safe junction temperature.
SN74LVC1G79QDCKTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Clock Frequency:
- 160 MHz
- Max Propagation Delay @ V, Max CL:
- 5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
SN74LVC1G79QDCKTQ1 FAQ
1.How can I place an order for SN74LVC1G79QDCKTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G79QDCKTQ1 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 SN74LVC1G79QDCKTQ1 reliable?
The price and inventory of SN74LVC1G79QDCKTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G79QDCKTQ1 is usually 5 days.
3.What payment methods are accepted for SN74LVC1G79QDCKTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G79QDCKTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC1G79QDCKTQ1?
SN74LVC1G79QDCKTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G79QDCKTQ1 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 SN74LVC1G79QDCKTQ1?
For technical support, including SN74LVC1G79QDCKTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G79QDCKTQ1 requirements.
6.How does Aetrix verify that SN74LVC1G79QDCKTQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G79QDCKTQ1 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 SN74LVC1G79QDCKTQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC1G79QDCKTQ1?
All SN74LVC1G79QDCKTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G79QDCKTQ1, 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 SN74LVC1G79QDCKTQ1 part is unused and in its original packaging.
Return procedure for SN74LVC1G79QDCKTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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