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Texas Instruments SN74AUC1G19DBVT
- Part No.:
- SN74AUC1G19DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- SOT-23-6
- Datasheet:
-
SN74AUC1G19DBVT.pdf
- Description:
- IC DECODER/DEMUX 1X1:2 SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,077
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Product details
Overview
SN74AUC1G19DBVT 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 buffers input A and routes true (Y0) and complemented (Y1) outputs under active-low enable (E), delivering ±8-mA drive at 1.8 V, sub-3-ns propagation delay, and 10-µA max ICC-enabling low-voltage signal routing in portable audio and embedded timing control.
For engineers reviewing the SN74AUC1G19DBVT datasheet, SN74AUC1G19DBVT pinout, SN74AUC1G19DBVT application, or SN74AUC1G19DBVT equivalent, key selection criteria include Ioff-enabled partial-power-down support, 3.6-V I/O tolerance for mixed-mode interfacing, latch-up immunity (>100 mA), and NanoFree™ SOT-23 package compatibility with space-constrained PCB layouts.
Technical Context
This device implements positive-logic decoding with active-low enable: when E = LOW, Y0 mirrors A and Y1 = NOT(A); when E = HIGH, both outputs go high-impedance. Its sub-1-V operability and 1.8-V optimized switching leverage TI's AUC logic family architecture for ultra-low-voltage digital signal distribution.
The integrated Ioff circuitry disables outputs during power-down, blocking backflow current across powered/unpowered rails-critical for hot-swap and multi-rail systems. ESD robustness (2000-V HBM, 1000-V CDM) and latch-up compliance per JESD 78 Class II ensure reliability in consumer and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 0.8 V to 2.7 V - supports battery-powered and mixed-supply systems including 1.2-V, 1.5-V, and 1.8-V domains |
| tpd (1.8 V, CL = 15 pF) | 2.4 ns max - enables high-speed data path selection in portable audio and SSD controller interfaces |
| Output Drive (1.8 V) | ±8 mA - sufficient to drive multiple CMOS inputs or short PCB traces without external buffering |
| Ioff Current | ±10 µA max - prevents damaging current flow between unpowered and powered sections during partial shutdown |
| IOH/VOL (1.65 V) | VOH ≥ 1.2 V, VOL ≤ 0.45 V - ensures noise margin >300 mV for reliable logic-level translation in 1.8-V systems |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for handheld and docked consumer electronics |
Pinout & Package
SN74AUC1G19DBVT uses the 6-pin SOT-23 (DBV) package, measuring 2.90 mm × 1.60 mm × 1.45 mm max height, with exposed pad not present and standard gull-wing lead form for reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Data Input | Primary logic input; determines Y0/Y1 output states when E is asserted |
| 2 (GND) | Ground Reference | Return path for all internal logic and output currents; must be low-impedance for noise control |
| 3 (E) | Active-Low Enable | Controls functional state: LOW enables decoding, HIGH forces Y0/Y1 into high-impedance |
| 4 (Y1) | Complemented Output | Asserts NOT(A) when enabled; used for differential signaling or inverted path selection |
| 5 (VCC) | Positive Supply | Power rail for core logic and output drivers; supports 0.8–2.7 V with 3.6-V I/O tolerance |
| 6 (Y0) | True Output | Asserts A when enabled; primary routed signal path in demux applications |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ Package | Dies-as-package construction eliminates bond wires and mold compound-reducing size, inductance, and thermal resistance vs. conventional SOT-23 |
| Ioff Partial-Power-Down | Automatically disables outputs when VCC = 0 V, preventing back-current damage in multi-rail hot-swap systems |
| 3.6-V I/O Tolerance | Allows safe interface with 3.3-V or 2.5-V controllers while operating from 1.8-V supply-eliminates level shifters in mixed-voltage designs |
| Sub-3-ns Propagation Delay | Enables use in high-speed clock/data gating paths up to ~300 MHz effective toggle rate (CL = 15 pF) |
| Latch-Up Immunity | Exceeds 100 mA per JESD 78 Class II-ensures robust operation in noisy power environments like AC/DC supplies and motor drives |
Applications
| Portable Audio Signal Routing | SSD Controller Interface |
|---|---|
|
Use Scenario: Selecting between dual DAC outputs or routing I²S data paths in MP3 players and wireless headsets. IC Role / Device Role / Timing Role: 1-of-2 demultiplexer enabling dynamic audio channel assignment under microcontroller control. Use Value: Sub-3-ns delay and ±8-mA drive ensure glitch-free switching without added buffering; Ioff prevents power-domain conflict during sleep mode. |
Use Scenario: Enabling discrete memory banks or peripheral select lines in client SSDs with 1.2-V/1.8-V hybrid power domains. IC Role / Device Role / Timing Role: Low-voltage address decoder managing NAND flash chip-select signals in space-constrained BGA modules. Use Value: 3.6-V I/O tolerance allows direct connection to 3.3-V host controllers; NanoFree™ footprint saves >40% board area vs. SC70. |
| Embedded PC Power Sequencing | AV Receiver HDMI Switch Control |
|
Use Scenario: Controlling enable sequencing of multiple DC/DC converters in fanless embedded PCs with tight thermal budgets. IC Role / Device Role / Timing Role: Dual-output decoder driving independent EN pins on voltage regulators based on system state signals. Use Value: Ioff protection isolates powered-down rails; 10-µA ICC minimizes quiescent current impact on always-on management circuits. |
Use Scenario: Managing HDMI source selection logic in AV receivers where microcontroller GPIOs are limited and voltage domains differ. IC Role / Device Role / Timing Role: Level-translating demux that routes control signals from 3.3-V MCU to 1.8-V HDMI switch enable inputs. Use Value: 3.6-V tolerant inputs accept 3.3-V MCU outputs directly; active-low enable simplifies firmware logic with pull-up defaults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1-of-2 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G19DBVT | Wider VCC range (1.65–5.5 V), higher ICC (max 10 µA same), but slower tpd (4.5 ns @ 3.3 V) | Better suited for 3.3-V-only systems; lacks sub-1-V operation and 3.6-V I/O tolerance | Choose when legacy 3.3-V compatibility outweighs ultra-low-voltage performance |
| NC7SZ19P5X | Same 1.65–5.5 V range, smaller SC-70-6 package (2.0 × 1.25 mm), but no Ioff and lower ESD (1500-V HBM) | Higher density but no partial-power-down support; less robust in hot-swap scenarios | Prefer for cost-sensitive, single-rail 3.3-V designs where board area is critical and power sequencing is simple |
Compared with SN74LVC1G19DBVT and NC7SZ19P5X, SN74AUC1G19DBVT uniquely delivers sub-1-V operation, Ioff-enabled power domain isolation, and 3.6-V I/O tolerance-making it the only choice for battery-powered, mixed-voltage, or thermally constrained applications requiring guaranteed low-threshold functionality.
Availability
SN74AUC1G19DBVT is available at Aetrix Electronics and suitable for portable audio, SSD controller, and embedded PC power sequencing applications requiring stable component supply, long-term lifecycle support, and consistent NanoFree™ SOT-23 packaging.
Supply support for SN74AUC1G19DBVT 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 50 years of innovation in high-reliability, low-power IC design.
The SN74AUC1G19 belongs to TI's AUC Sub-1-V Little Logic family-engineered specifically for ultra-low-voltage signal routing, power-aware demultiplexing, and mixed-mode interfacing in portable and energy-efficient systems.
FAQ
What is the minimum operating voltage for SN74AUC1G19DBVT?
The SN74AUC1G19DBVT operates down to 0.8 V, with guaranteed functionality across the full 0.8–2.7 V range. Its design is specifically optimized for 1.65–1.95 V operation, where parameters like tpd and output drive are characterized-making SN74AUC1G19DBVT ideal for modern 1.8-V battery-powered systems.
Does SN74AUC1G19DBVT support partial-power-down mode?
Yes, SN74AUC1G19DBVT features Ioff circuitry that disables outputs when VCC = 0 V, preventing damaging current backflow between powered and unpowered sections. This capability is explicitly validated per JEDEC JESD78 and makes SN74AUC1G19DBVT suitable for hot-swap and multi-rail embedded systems.
What package type is used by SN74AUC1G19DBVT?
SN74AUC1G19DBVT uses the 6-pin SOT-23 (DBV) package, measuring 2.90 mm × 1.60 mm with 1.45 mm max height. It employs TI's NanoFree™ technology-where the silicon die serves as the package-reducing parasitic inductance and footprint versus conventional wire-bonded SOT-23 variants.
Can SN74AUC1G19DBVT interface with 3.3-V logic signals?
Yes, SN74AUC1G19DBVT has 3.6-V I/O tolerance, allowing its inputs and outputs to safely accept and drive 3.3-V signals-even while operating from a 1.8-V supply. This eliminates external level shifters in mixed-voltage designs, a key advantage over standard LVC-family decoders.
What is the maximum propagation delay of SN74AUC1G19DBVT at 1.8 V?
At VCC = 1.8 V and CL = 15 pF, SN74AUC1G19DBVT guarantees a maximum propagation delay (tpd) of 2.4 ns for both A→Y0 and E→Y transitions. This value is measured under worst-case conditions and confirms SN74AUC1G19DBVT's suitability for high-speed signal routing in portable audio and SSD applications.
SN74AUC1G19DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SOT-23-6
SN74AUC1G19DBVT FAQ
1.How can I place an order for SN74AUC1G19DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC1G19DBVT 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 SN74AUC1G19DBVT reliable?
The price and inventory of SN74AUC1G19DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC1G19DBVT is usually 5 days.
3.What payment methods are accepted for SN74AUC1G19DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUC1G19DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AUC1G19DBVT?
SN74AUC1G19DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUC1G19DBVT 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 SN74AUC1G19DBVT?
For technical support, including SN74AUC1G19DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC1G19DBVT requirements.
6.How does Aetrix verify that SN74AUC1G19DBVT is sourced from the original manufacturer or authorized distributors?
All SN74AUC1G19DBVT 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 SN74AUC1G19DBVT meets industry standards.
7.What is the process for return or replacement of SN74AUC1G19DBVT?
All SN74AUC1G19DBVT units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC1G19DBVT, 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 SN74AUC1G19DBVT part is unused and in its original packaging.
Return procedure for SN74AUC1G19DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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