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Texas Instruments SN74AUC1G19DCKR
- Part No.:
- SN74AUC1G19DCKR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SN74AUC1G19DCKR.pdf
- Description:
- IC DECODER/DEMUX 1X1:2 SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,525
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Product details
Overview
SN74AUC1G19DCKR from Texas Instruments is a single 1-of-2 decoder/demultiplexer IC operating from 0.8 V to 2.7 V, optimized for 1.65–1.95 V supply. It features active-low enable (E), true (Y0) and complemented (Y1) outputs, ±8-mA drive at 1.8 V, 3 ns max propagation delay, and Ioff partial-power-down support. It serves in low-voltage signal routing for portable audio and embedded timing control.
For engineers reviewing the SN74AUC1G19DCKR datasheet, SN74AUC1G19DCKR pinout, SN74AUC1G19DCKR application, or SN74AUC1G19DCKR equivalent, this page delivers verified functional behavior, SC70-6 package details, sub-1-V operability, 3.6-V I/O tolerance, latch-up immunity (>100 mA), and ESD robustness (2000-V HBM) - all confirmed per TI SCES626E (Rev. E, June 2017).
Technical Context
The SN74AUC1G19DCKR implements positive-logic decoding: when E is low, Y0 mirrors A and Y1 is its inverse; when E is high, both outputs go high-impedance. Its Ioff circuitry blocks current backflow during partial power-down, enabling safe hot-insertion in mixed-supply systems.
Designed for ultra-low-voltage operation, it maintains full functionality down to 0.8 V VCC while supporting 3.6-V tolerant I/O - critical for interfacing between 1.8-V logic and legacy 3.3-V subsystems without level shifters. All inputs and outputs are CMOS-compatible with rail-to-rail swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 0.8 V to 2.7 V - enables direct integration into sub-1-V and 1.8-V power domains without external regulation |
| Max tpd | 3 ns at 1.8 V, CL = 15 pF - supports high-speed data routing in portable audio clock trees and SSD control paths |
| Output Drive | ±8 mA at 1.8 V - sufficient to drive multiple CMOS loads or short PCB traces without buffering |
| Ioff Current | ±10 µA max - ensures negligible leakage during system sleep modes, preserving battery life in portable devices |
| ESD Rating | 2000-V HBM - meets industrial handling requirements and reduces need for external protection in consumer PCBs |
| ICC (max) | 10 µA - ultra-low static power ideal for always-on control logic in wearables and IoT edge nodes |
Pinout & Package
SN74AUC1G19DCKR uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm pitch, 1.1 mm max height, JEDEC MO-203 AB compliant. Pin 1 (A) is located in quadrant Q3 per tape orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Data input | Primary logic signal routed to Y0 (true) and Y1 (complement) when E is asserted |
| E | Active-low enable | Controls output state: low enables decoding; high forces Y0/Y1 into high-impedance |
| GND | Ground reference | Return path for all internal logic and output currents; must be low-impedance for noise immunity |
| VCC | Positive supply | Power source for core logic and output drivers; supports 0.8–2.7 V with full spec compliance |
| Y0 | True output | Passes inverted or non-inverted A depending on E state; drives downstream logic or enable lines |
| Y1 | Complemented output | Provides logical inverse of A when enabled; used for dual-path control or differential signaling |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Dies-as-package construction eliminates leadframe, reducing size (2.00 × 1.25 mm) and thermal resistance (RθJA = 252°C/W) |
| 3.6-V I/O tolerance | Allows direct connection to 3.3-V buses while powered from 1.8-V rails - eliminates discrete level shifters |
| Ioff partial-power-down | Prevents back-current flow when VCC = 0 V, enabling safe insertion into live backplanes or hot-swap modules |
| Sub-1-V operability | Functional at 0.8 V VCC - supports next-generation ultra-low-power microcontrollers and energy-harvesting systems |
| Latch-up immunity | >100 mA per JESD 78 Class II - ensures reliability in noisy industrial environments with transient coupling |
Applications
| Portable Audio Signal Routing | SSD Power Sequencing Control |
|---|---|
|
Use Scenario: Selecting between two audio DAC paths in a wireless headset based on codec mode. IC Role / Device Role / Timing Role: Decoder routes master clock or data enable to one of two audio subsystems under firmware control. Use Value: Eliminates need for discrete switches or larger logic gates; 3 ns delay preserves jitter-sensitive audio timing. |
Use Scenario: Enabling primary vs. backup power rails during SSD cold-start or recovery sequences. IC Role / Device Role / Timing Role: Demux generates complementary enable signals for PMIC sequencing logic in client SSDs. Use Value: Ioff prevents backfeed from powered rails into unpowered sections, meeting JEDEC U.2 power integrity requirements. |
| Embedded PC Fan Speed Control | Tablet Display Backlight Enable Logic |
|
Use Scenario: Selecting between PWM-controlled fan profiles (quiet vs. performance) in fanless embedded PCs. IC Role / Device Role / Timing Role: Decodes thermal zone status bits to assert dedicated fan enable lines with minimal latency. Use Value: ±8-mA drive directly interfaces with fan driver ICs; 10-µA ICC avoids adding load to always-on RTC power domain. |
Use Scenario: Activating main backlight vs. auxiliary indicator LEDs based on tablet lid-open detection. IC Role / Device Role / Timing Role: Acts as dual-output enable gate synchronized to hinge sensor interrupt, minimizing wake latency. Use Value: 0.8-V operation allows direct interface with low-voltage lid sensor outputs; SC70 footprint saves space in narrow bezel designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G19DCKR | Wider VCC range (1.65–5.5 V); higher ICC (max 10 µA same, but typical >1 µA); no sub-1-V operation | Preferred where 5-V legacy compatibility or higher drive (24 mA) is required; not suitable for <1.2-V systems | Select when interfacing with mixed 3.3/5-V logic; avoid if sub-1.65-V operation or lowest possible ICC is mandatory |
| NC7SZ19P6X | Same SC70-6 package; VCC = 1.65–5.5 V; max tpd = 3.5 ns at 3.3 V; no Ioff or 3.6-V tolerance | Better for cost-sensitive consumer designs with stable 3.3-V rails; lacks partial-power-down capability | Choose for high-volume portable electronics where 1.8-V-only operation and hot-swap safety are not required |
Compared with SN74LVC1G19DCKR and NC7SZ19P6X, the SN74AUC1G19DCKR uniquely supports sub-1-V operation, 3.6-V I/O tolerance, and Ioff - making it the only option for battery-constrained, multi-rail, or hot-pluggable embedded systems requiring guaranteed low-voltage decode functionality.
Availability
SN74AUC1G19DCKR is available at Aetrix Electronics and suitable for portable audio, SSD power management, embedded PC thermal control, and tablet display enable applications requiring stable component supply, long-term lifecycle support, and consistent SC70-6 packaging.
Supply support for SN74AUC1G19DCKR 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 over 90 years of innovation in power management and signal chain technologies.
The SN74AUC1G19DCKR belongs to TI's AUC Sub-1-V Little Logic family, engineered specifically for ultra-low-voltage signal routing in portable, battery-powered, and energy-efficient systems where traditional logic families cannot operate.
FAQ
What is the minimum operating voltage for SN74AUC1G19DCKR?
The SN74AUC1G19DCKR operates down to 0.8 V VCC, as specified in Section 6.3 (Recommended Operating Conditions) of the TI SCES626E datasheet. This sub-1-V capability enables direct use with emerging ultra-low-power microcontrollers and energy-harvesting power supplies - a key differentiator versus standard LVC or AHC logic families.
Does SN74AUC1G19DCKR support hot-swap or partial-power-down operation?
Yes. The SN74AUC1G19DCKR integrates Ioff circuitry that disables outputs and limits off-state current to ±10 µA when VCC = 0 V. This prevents damaging back-current flow during hot-insertion or partial system shutdown - confirmed in Section 3 (Description) and Section 6.5 (Electrical Characteristics) of the official datasheet.
What is the maximum propagation delay of SN74AUC1G19DCKR at 1.8 V?
The maximum propagation delay (tpd) of SN74AUC1G19DCKR is 3 ns at VCC = 1.8 V with CL = 15 pF, per Table 6.6 (Switching Characteristics) in the TI SCES626E datasheet. This value applies to both A→Y0 and E→Y transitions and ensures timing-critical routing in portable audio clock distribution networks.
Is SN74AUC1G19DCKR compatible with 3.3-V I/O systems?
Yes. Although optimized for 1.65–1.95 V VCC, the SN74AUC1G19DCKR features 3.6-V tolerant I/O pins - meaning inputs and outputs safely interface with 3.3-V logic without external level shifters. This is explicitly stated in the "Features" section and validated in Absolute Maximum Ratings (Section 6.1).
What package type does SN74AUC1G19DCKR use, and what are its dimensions?
SN74AUC1G19DCKR uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm body size, 0.65 mm pin pitch, and 1.1 mm maximum height. Mechanical drawings confirm JEDEC MO-203 AB compliance, and tape-and-reel data (Package Materials Information) specifies Q3 pin-1 orientation for automated placement.
SN74AUC1G19DCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 1:2
- Independent Circuits:
- 1
- Current - Output High, Low:
- 9mA, 9mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 0.8V ~ 2.7V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
SN74AUC1G19DCKR FAQ
1.How can I place an order for SN74AUC1G19DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC1G19DCKR 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 SN74AUC1G19DCKR reliable?
The price and inventory of SN74AUC1G19DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC1G19DCKR is usually 5 days.
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SN74AUC1G19DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUC1G19DCKR 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 SN74AUC1G19DCKR?
For technical support, including SN74AUC1G19DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC1G19DCKR requirements.
6.How does Aetrix verify that SN74AUC1G19DCKR is sourced from the original manufacturer or authorized distributors?
All SN74AUC1G19DCKR 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 SN74AUC1G19DCKR meets industry standards.
7.What is the process for return or replacement of SN74AUC1G19DCKR?
All SN74AUC1G19DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC1G19DCKR, 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 SN74AUC1G19DCKR part is unused and in its original packaging.
Return procedure for SN74AUC1G19DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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