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Texas Instruments SN74LVC1G27DCKR
- Part No.:
- SN74LVC1G27DCKR
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SN74LVC1G27DCKR.pdf
- Description:
- IC GATE NOR 1CH 3-INP SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:12,430
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Product details
Overview
SN74LVC1G27DCKR from Texas Instruments is a single 3-input positive-NOR gate logic IC in SC70-6 (DCK) package, performing Y = A + B + C with 4.5 ns max propagation delay at 3.3 V, ±24-mA output drive, and 10-µA max ICC. It supports 1.65–5.5 V supply, 5.5-V tolerant inputs, and Ioff for live insertion in battery-powered sensor interfaces.
For engineers reviewing the SN74LVC1G27DCKR datasheet, SN74LVC1G27DCKR pinout, SN74LVC1G27DCKR application, or SN74LVC1G27DCKR equivalent, key selection criteria include input voltage tolerance, Ioff-enabled partial-power-down capability, nanosecond-level timing in space-constrained portable designs, and compatibility with 1.8-V/2.5-V/3.3-V/5-V mixed-signal systems.
Technical Context
This device implements a standard CMOS 3-input NOR function with positive logic (Y = A + B + C), fully specified for operation across –40°C to 125°C. Its Ioff circuitry actively disables outputs during power-down, preventing backflow current when VCC = 0 V - critical for hot-swap and multi-rail system interconnects.
The SN74LVC1G27DCKR accepts input voltages up to 5.5 V independent of VCC, enabling level translation from higher-voltage controllers into lower-voltage logic domains. Its NanoFree™ SC70 package uses the die as the package, eliminating bond wires and reducing parasitic inductance for improved signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 3-input positive-NOR (Y = A + B + C) |
| Max Propagation Delay | 4.5 ns at VCC = 3.3 V, CL = 15 pF - enables sub-200-MHz operation in combinatorial paths |
| Supply Voltage Range | 1.65 V to 5.5 V - supports direct interface with 1.8-V, 2.5-V, 3.3-V, and 5-V logic families |
| Input Voltage Tolerance | Up to 5.5 V regardless of VCC - allows mixed-voltage signal routing without external level shifters |
| Ioff Current | ±10 µA max - ensures safe isolation during partial power-down or hot insertion |
| Output Drive Strength | ±24 mA at VCC = 3.3 V - sufficient to drive multiple LVC loads or small capacitive traces |
| Quiescent ICC | 10 µA max - minimizes standby power in always-on IoT node control logic |
Pinout & Package
SN74LVC1G27DCKR uses the SC70-6 (DCK) package: 2.0 × 1.25 × 0.9 mm, 6-pin surface-mount, pin 1 marked by notch or dot, JEDEC MO-203AB compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Input | First NOR input; accepts 0–5.5 V; internally pulled down when unused per TI recommendation |
| 2 (GND) | Ground | Reference return path for all signals and power; must be low-impedance for noise immunity |
| 3 (B) | Input | Second NOR input; identical electrical specs to Pin 1; requires tie-high/tie-low if unused |
| 4 (Y) | Output | Active-low NOR result; drives high/low with full rail-to-rail swing and ±24-mA capability |
| 5 (C) | Input | Third NOR input; same VIH/VIL thresholds as Pins 1 and 3; no internal pull-up/pull-down |
| 6 (VCC) | Supply | Positive supply rail; bypassing with 100-nF ceramic capacitor near pin is mandatory for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ SC70 package | Die-as-package construction reduces size by >50% vs. standard SOT-23 and eliminates bond wire inductance |
| Ioff partial-power-down support | Enables safe insertion into powered backplanes without disrupting adjacent circuitry or causing latch-up |
| 5.5-V tolerant inputs | Eliminates need for discrete level-shifting components when interfacing 5-V sensors to 3.3-V microcontrollers |
| Low dynamic power (Cpd = 19 pF) | Reduces switching current and EMI in high-frequency clock distribution or data-path gating |
| Latch-up immunity >100 mA | Meets JESD 78 Class II - ensures robustness against transient overvoltage events in industrial environments |
Applications
| Power Sequencing Control | Sensor Signal Conditioning |
|---|---|
Use Scenario: Coordinating startup order of multiple voltage rails in FPGA or SoC power management. IC Role / Device Role / Timing Role: NOR gate combines enable signals from sequencer ICs to generate synchronized reset pulses. Use Value: 4.5 ns tpd ensures deterministic timing margin between rail enable edges; Ioff prevents backfeed during intermediate power states. | Use Scenario: Converting analog comparator outputs (open-drain) into clean active-high logic for MCU interrupt inputs. IC Role / Device Role / Timing Role: Active-low NOR inverts and OR-combines three fault flags (overtemp, overcurrent, undervoltage). Use Value: 5.5-V tolerant inputs accept direct connection to 5-V comparators; ±24-mA drive sinks MCU GPIO leakage reliably. |
| Portable Device Keypad Scan | Industrial PLC Input Debouncing |
Use Scenario: Encoding row/column keypress detection in ultra-thin wearables with strict board area limits. IC Role / Device Role / Timing Role: NOR gate performs wired-OR logic on scan lines to reduce GPIO count required by host processor. Use Value: NanoFree™ SC70 footprint (2.0 × 1.25 mm) saves >60% board area vs. SOT-23; 10-µA ICC extends battery life in sleep mode. | Use Scenario: Filtering mechanical switch bounce in DIN-rail mounted control modules operating at 125°C ambient. IC Role / Device Role / Timing Role: NOR gate implements hardware debounce by combining delayed and raw switch signals. Use Value: Guaranteed operation from –40°C to 125°C; latch-up immunity >100 mA withstands field-induced transients per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-input NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G27DBVR | SOT-23-6 (DBV) package; 1.3-mm height vs. DCK's 0.9-mm; θJA = 165°C/W vs. DCK's 259°C/W | Better thermal performance in high-density layouts; larger footprint unsuitable for ultra-thin devices | Select DBVR when thermal dissipation dominates board space constraints |
| 74LVC1G27GW,125 | NXP SC-70-6 package; identical pinout; max tpd = 5.1 ns at 3.3 V; Ioff = ±20 µA max | Slightly slower timing; higher Ioff may reduce isolation margin in live-insertion scenarios | Select NXP part only if dual-sourcing is mandated and 0.6-ns timing margin is acceptable |
Compared with SN74LVC1G27DBVR and 74LVC1G27GW,125, the SN74LVC1G27DCKR delivers the lowest profile (0.9 mm) for space-constrained designs, tightest propagation delay (4.5 ns), and lowest Ioff (±10 µA), making it optimal for portable and thermally isolated applications where board thickness and power sequencing integrity are critical.
Availability
SN74LVC1G27DCKR is available at Aetrix Electronics and suitable for portable electronics, industrial sensor nodes, and automotive body-control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LVC1G27DCKR 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, energy efficiency, and design scalability.
The SN74LVC1G27 belongs to TI's LVC logic family, engineered for low-voltage, high-speed operation in portable, industrial, and automotive systems where mixed-voltage interfacing and power-aware design are essential.
FAQ
What is the maximum operating temperature range for the SN74LVC1G27DCKR?
The SN74LVC1G27DCKR is fully specified from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 latch-up testing and supported by thermal characterization (θJA = 259°C/W for SC70). Operation at 125°C requires appropriate PCB copper pour and airflow per TI's thermal design guidelines. The SN74LVC1G27DCKR maintains full logic functionality and timing compliance across this entire range.
Does the SN74LVC1G27DCKR support level translation between different supply voltages?
Yes, the SN74LVC1G27DCKR supports bidirectional level translation via its 5.5-V tolerant inputs. When VCC = 1.8 V, inputs can swing from 0 V to 5.5 V without damage or logic error, allowing direct connection to 3.3-V or 5-V controllers. Output levels remain referenced to VCC, so a 1.8-V VCC yields 0–1.8-V output swing. This eliminates external translators in mixed-voltage signal conditioning paths using the SN74LVC1G27DCKR.
How does the Ioff feature of the SN74LVC1G27DCKR protect system integrity during power-down?
The Ioff circuitry in the SN74LVC1G27DCKR disables all outputs when VCC = 0 V, limiting off-state current to ±10 µA max. This prevents damaging backflow current from powered downstream circuits (e.g., 3.3-V MCU) into the unpowered SN74LVC1G27DCKR, avoiding latch-up or false logic states. It enables safe live insertion into backplanes and supports partial-power-down modes in battery-backed systems - a core requirement verified in TI's application report SCBA004.
What is the recommended PCB layout practice for the SN74LVC1G27DCKR's VCC and GND pins?
TI specifies a 100-nF X7R ceramic capacitor placed within 2 mm of the SN74LVC1G27DCKR's VCC (Pin 6) and GND (Pin 2), with short, wide traces and direct connection to solid ground plane. The SC70-6 land pattern must follow TI's DCK0006A outline: 2.3 mm × 2.55 mm pad dimensions, 0.4 mm pitch, and solder mask defined (preferred) or non-solder mask defined pads. Thermal relief on GND improves reflow yield without compromising noise immunity for the SN74LVC1G27DCKR.
Can unused inputs on the SN74LVC1G27DCKR be left floating?
No - all unused inputs of the SN74LVC1G27DCKR must be tied to VCC or GND to prevent metastability, increased ICC, or oscillation. TI's application report SCBA004 confirms that floating CMOS inputs cause excessive current draw and unpredictable output states. For the SN74LVC1G27DCKR, tying an unused input to VCC forces the NOR output low (since Y = A + B + C), while tying to GND preserves functional behavior of remaining inputs. Resistor ties are unnecessary; direct connection suffices.
SN74LVC1G27DCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- NOR Gate
- Number of Circuits:
- 1
- Number of Inputs:
- 3
- Features:
- -
- Voltage - Supply:
- 1.65V ~ 5.5V
- Current - Quiescent (Max):
- 10 µA
- Current - Output High, Low:
- 32mA, 32mA
- Input Logic Level - Low:
- 0.7V ~ 0.8V
- Input Logic Level - High:
- 1.7V ~ 2V
- Max Propagation Delay @ V, Max CL:
- 3.6ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
SN74LVC1G27DCKR FAQ
1.How can I place an order for SN74LVC1G27DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G27DCKR 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 SN74LVC1G27DCKR reliable?
The price and inventory of SN74LVC1G27DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G27DCKR is usually 5 days.
3.What payment methods are accepted for SN74LVC1G27DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G27DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC1G27DCKR?
SN74LVC1G27DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G27DCKR 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 SN74LVC1G27DCKR?
For technical support, including SN74LVC1G27DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G27DCKR requirements.
6.How does Aetrix verify that SN74LVC1G27DCKR is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G27DCKR 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 SN74LVC1G27DCKR meets industry standards.
7.What is the process for return or replacement of SN74LVC1G27DCKR?
All SN74LVC1G27DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G27DCKR, 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 SN74LVC1G27DCKR part is unused and in its original packaging.
Return procedure for SN74LVC1G27DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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