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Texas Instruments SN74LVC1G79DCKR
- Part No.:
- SN74LVC1G79DCKR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LVC1G79DCKR.pdf
- Description:
- IC FF D-TYPE SNGL 1BIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,435
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Product details
Overview
SN74LVC1G79DCKR from Texas Instruments is a single positive-edge-triggered D-type flip-flop designed for 1.65V to 5.5V operation, delivering 6ns max propagation delay at 3.3V/50pF, ±24mA output drive, and Ioff-enabled partial-power-down protection. It serves as a compact data latch in low-voltage control paths of microcontroller GPIO interfaces.
For engineers reviewing the SN74LVC1G79DCKR datasheet, SN74LVC1G79DCKR pinout, SN74LVC1G79DCKR application, or SN74LVC1G79DCKR equivalent, key selection criteria include its SC70-5 package footprint, guaranteed data retention down to 1.5V VCC, 160MHz max clock frequency, and over-voltage tolerant inputs up to 5.5V independent of supply voltage.
Technical Context
The SN74LVC1G79DCKR implements a synchronous edge-triggered storage element with precise setup (1.2–2.6ns) and hold (0.3–1.0ns) timing requirements across 1.65V–5.5V VCC. Its clock triggering occurs at a defined voltage threshold-not dependent on input slew rate-enabling robust operation with moderate-edge-rate clocks.
It features balanced CMOS push-pull outputs, standard high-impedance CMOS inputs with 4pF typical input capacitance, and integrated clamp diodes on all I/O pins. The Ioff circuitry actively disables outputs during power-down, preventing back-drive current and supporting hot-insertion in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - supports direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic domains |
| tpd (max) | 6ns at 3.3V/50pF - enables reliable operation in high-speed digital control loops up to 160MHz |
| Output Drive | ±24mA at 3.3V - sufficient to directly drive light capacitive loads or fan-out to multiple LVC inputs without buffers |
| Ioff Leakage | ±10µA max - ensures safe isolation during partial power-down, eliminating back-current risk in mixed-supply systems |
| Input Voltage Range | 0V to 5.5V - allows 5V-tolerant inputs even when VCC = 1.8V, simplifying level-shifting in mixed-voltage designs |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood applications requiring extended thermal range |
| ESD Rating | ±2000V HBM - meets JEDEC JS-001 Class II for robust handling in automated assembly and field environments |
Pinout & Package
SN74LVC1G79DCKR is packaged in a 5-pin SC70 (DCK) package measuring 2.00mm × 2.10mm, optimized for space-constrained PCB layouts while maintaining standard SMT reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - D | Data input | Asynchronous data source synchronized to CLK↑; accepts voltages up to 5.5V regardless of VCC |
| 2 - CLK | Clock input | Positive-edge-triggered control signal; voltage-level-sensitive (not slew-rate-dependent) for timing predictability |
| 3 - GND | Ground reference | Primary return path for all internal logic and I/O currents; must be low-impedance for noise immunity |
| 4 - Q | Non-inverted output | Edge-aligned replica of D sampled at CLK↑; capable of sourcing/sinking ±24mA at 3.3V |
| 5 - VCC | Power supply | Single supply rail powering core logic and I/O; supports 1.65V–5.5V operation with data retention down to 1.5V |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Dies-as-package construction eliminates leadframe, reducing size to 2.00mm × 2.10mm SC70 footprint with improved thermal resistance |
| Over-voltage tolerant inputs | Inputs rated to 5.5V independent of VCC - eliminates external level shifters when interfacing 5V signals to 1.8V systems |
| Partial-power-down support | Ioff circuitry forces all I/O into high-Z state when VCC = 0V - prevents back-drive damage in hot-swap or multi-rail power sequencing |
| Data retention capability | Maintains Q output state down to VCC = 1.5V - enables glitch-tolerant latching in brownout-prone embedded control applications |
| Low ICC consumption | 10µA max supply current - suitable for always-on monitoring circuits and battery-backed status storage |
Applications
| Test & Measurement | Enterprise Switching |
|---|---|
Use Scenario: Capturing transient digital signals in logic analyzers and boundary-scan test fixtures. IC Role / Device Role / Timing Role: Edge-triggered data latch synchronizing asynchronous probe inputs to system clock domain. Use Value: 6ns tpd and 160MHz fmax enable accurate capture of fast digital edges without added latency or metastability risk. |
Use Scenario: Glitch-free state holding in packet buffer control logic and port enable/disable sequencing. IC Role / Device Role / Timing Role: Single-bit storage element for configuring switch fabric routing states on power-up or reset. Use Value: Ioff and 1.5V data retention ensure stable configuration retention during partial power cycling of switch ASICs. |
| Telecom Infrastructure | Personal Electronics |
Use Scenario: Level-shifting and synchronization of control signals between 5V legacy PHYs and 3.3V/1.8V baseband processors. IC Role / Device Role / Timing Role: Voltage-tolerant D flip-flop acting as a bidirectional interface bridge with no external components. Use Value: 5.5V input tolerance and 1.65V–5.5V VCC range eliminate discrete level translators in mixed-voltage telecom modules. |
Use Scenario: Power-state retention in smartphone peripheral controllers (e.g., display backlight enable, sensor wake signals). IC Role / Device Role / Timing Role: Low-leakage storage element preserving user-configured states during deep-sleep modes. Use Value: 10µA max ICC and guaranteed 1.5V data retention extend battery life while maintaining functional integrity across sleep cycles. |
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 |
|---|---|---|---|
| SN74LVC1G74DCKR | Dual D-type flip-flop in same SC70-5 package; higher ICC (20µA), identical timing and voltage specs | Provides two independent latches per package - beneficial where dual-bit synchronization is required | Select when needing two synchronized bits in minimal area; not a drop-in replacement due to doubled functionality and different pinout |
| 74LVC1G80GW,125 | NXP variant in SC70-5; identical VCC range and Ioff, but 7ns tpd (vs. 6ns) and ±24mA drive at 3.3V | Same industrial temp range and footprint - suitable for second-source qualification in cost-sensitive production | Valid alternative for non-critical timing paths; verify timing margin with 1ns slower tpd in high-frequency designs |
Compared with SN74LVC1G79DCKR, SN74LVC1G74DCKR offers dual-latch density at slightly higher power, while 74LVC1G80GW,125 provides NXP-sourced equivalence with minor timing trade-offs - both require layout verification due to non-identical pin functions.
Availability
SN74LVC1G79DCKR is available at Aetrix Electronics and suitable for test and measurement instrumentation, enterprise switching control logic, and telecom infrastructure requiring stable component supply with full industrial temperature support.
Supply support for SN74LVC1G79DCKR 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 innovation in low-voltage, high-speed logic families.
The SN74LVC1G79 belongs to TI's LVC (Low-Voltage CMOS) logic portfolio, engineered for interoperability across 1.65V–5.5V supply domains and optimized for space-constrained, power-sensitive digital control applications.
FAQ
What is the maximum clock frequency supported by SN74LVC1G79DCKR?
The SN74LVC1G79DCKR supports a maximum clock frequency of 160MHz across its full operating temperature range (–40°C to +125°C) and supply voltage range (1.65V to 5.5V), as verified under CL = 15pF, 30pF, and 50pF load conditions per TI's SCES220V datasheet Section 5.6–5.10.
Does SN74LVC1G79DCKR retain its output state during brief VCC dips?
Yes, SN74LVC1G79DCKR guarantees data retention down to VCC = 1.5V. When VCC drops to 1.5V (but remains ≥1.5V), the Q output maintains its last latched state. Below 1.5V, data retention is not specified - this behavior is confirmed in Section 8.1 and Figure 8-2 of the official datasheet.
Can SN74LVC1G79DCKR accept 5V input signals while powered from 1.8V?
Yes, SN74LVC1G79DCKR features over-voltage tolerant inputs rated to 5.5V regardless of VCC level. When powered from 1.8V, the D and CLK inputs safely accept 0–5.5V signals without damage or level-shifting components - a key specification confirmed in Section 5.3 (VI range) and Section 7.3.5.
What is the purpose of the Ioff feature in SN74LVC1G79DCKR?
The Ioff feature in SN74LVC1G79DCKR disables all outputs and places them in high-impedance state when VCC = 0V, preventing back-drive current from other powered rails. This protects the device during partial power-down or hot-swap events, with leakage limited to ±10µA per pin (Section 5.5, Ioff parameter).
Which package type does SN74LVC1G79DCKR use, and what are its dimensions?
SN74LVC1G79DCKR uses the SC70-5 (DCK) package, measuring 2.00mm × 2.10mm (length × width) with a 0.65mm pitch. This is explicitly documented in the "Package Information" table and Figure 4-2 (DCK top view) of the TI SCES220V datasheet.
SN74LVC1G79DCKR 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:
- 4.5ns @ 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
SN74LVC1G79DCKR FAQ
1.How can I place an order for SN74LVC1G79DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G79DCKR 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 SN74LVC1G79DCKR reliable?
The price and inventory of SN74LVC1G79DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G79DCKR is usually 5 days.
3.What payment methods are accepted for SN74LVC1G79DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G79DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC1G79DCKR?
SN74LVC1G79DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G79DCKR 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 SN74LVC1G79DCKR?
For technical support, including SN74LVC1G79DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G79DCKR requirements.
6.How does Aetrix verify that SN74LVC1G79DCKR is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G79DCKR 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 SN74LVC1G79DCKR meets industry standards.
7.What is the process for return or replacement of SN74LVC1G79DCKR?
All SN74LVC1G79DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G79DCKR, 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 SN74LVC1G79DCKR part is unused and in its original packaging.
Return procedure for SN74LVC1G79DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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