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Texas Instruments SN74AUC1G74DCURG4
- Part No.:
- SN74AUC1G74DCURG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
SN74AUC1G74DCURG4.pdf
- Description:
- IC FF D-TYPE SNGL 1BIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,957
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Product details
Overview
SN74AUC1G74DCURG4 from Texas Instruments is a single positive-edge-triggered D-type flip-flop with asynchronous clear (CLR) and preset (PRE), designed for ultra-low-voltage operation from 0.8 V to 2.7 V and optimized for 1.65–1.95 V supply. It delivers ±8-mA output drive at 1.8 V, achieves 1.5 ns max propagation delay (tpd), and supports Ioff partial-power-down mode. It is used in high-speed clock-domain interfacing and level-shifting applications in portable and battery-powered systems.
For engineers reviewing the SN74AUC1G74DCURG4 datasheet, SN74AUC1G74DCURG4 pinout, SN74AUC1G74DCURG4 application, or SN74AUC1G74DCURG4 equivalent, key selection criteria include sub-1-V operability, 250-MHz max clock frequency at 1.8 V, Ioff-enabled power sequencing, ±8-mA drive strength, and VSSOP-8 (DCU) package compatibility with space-constrained PCB layouts.
Technical Context
This device implements a synchronous edge-triggered storage element with priority-encoded asynchronous control: CLR overrides PRE when both are asserted low. Its internal logic operates on true positive-edge clock detection independent of input slew rate, enabling robust timing across mixed-voltage domains. The flip-flop maintains state integrity during voltage transitions via Ioff circuitry that disables outputs when VCC = 0.
Designed for 1.8-V core logic with 3.6-V I/O tolerance, it supports mixed-mode signal interfacing between legacy 3.3-V peripherals and modern low-voltage processors. Its NanoFree™-compatible VSSOP-8 (DCU) footprint enables direct integration into compact mobile SoC interconnect paths without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 0.8 V to 2.7 V - Enables operation in sub-1-V bias rails and compatibility with 1.2-V/1.5-V/1.8-V logic families. |
| Max tpd | 1.5 ns at 1.8 V - Supports >250-MHz clock domain bridging in high-speed serial interface glue logic. |
| Output Drive | ±8 mA at 1.8 V - Sufficient to drive 15-pF loads directly without external buffers in dense routing environments. |
| Ioff Support | Active at VCC = 0 - Prevents back-current flow during partial power-down, critical for hot-plug and multi-rail sequencing. |
| Input Voltage Range | –0.5 V to 3.6 V - Allows safe interfacing with 3.3-V signals while powered from 1.8-V supply (mixed-mode I/O). |
| Max Clock Frequency | 250 MHz at 1.8 V - Meets timing requirements for DDR source-synchronous clock forwarding and data capture. |
| ICC (Max) | 10 µA - Minimizes quiescent power in always-on subsystems such as real-time clocks or wake-up controllers. |
Pinout & Package
VSSOP-8 (DCU) package: 2.0 mm × 1.25 mm body, 0.5-mm lead pitch, 0.9-mm max height, exposed thermal pad optional, RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLR (Active-Low Clear) | Asynchronous reset: forces Q = 1, Q̅ = 0 regardless of clock or data state; higher priority than PRE. |
| 2 | CLK (Clock Input) | Positive-edge-triggered sampling node; threshold-based triggering ensures immunity to slow-rising clocks. |
| 3 | D (Data Input) | Synchronous data source; sampled on CLK↑ if PRE and CLR are inactive (high). |
| 4 | GND | Reference ground for all internal logic and I/O; must be low-impedance for noise-free switching. |
| 5 | VCC | Core supply rail (0.8–2.7 V); powers internal logic and output drivers; decoupling required near pin. |
| 6 | PRE (Active-Low Preset) | Asynchronous set: forces Q = 0, Q̅ = 1; overridden by CLR when both low. |
| 7 | Q (True Output) | Non-inverted registered output; driven actively high/low; supports fan-out to multiple 15-pF loads. |
| 8 | Q̅ (Complement Output) | Inverted registered output; complementary to Q; enables differential signaling or toggle functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-1-V Operation | Functional down to 0.8 V VCC - enables integration into emerging ultra-low-power microcontroller subsystems. |
| Ioff Partial-Power-Down | Outputs enter high-impedance state when VCC = 0 - eliminates backfeed current during rail sequencing or sleep modes. |
| 3.6-V I/O Tolerance | Inputs accept up to 3.6 V regardless of VCC - allows direct connection to 3.3-V buses without external level translators. |
| Low Propagation Delay | 1.5 ns max tpd at 1.8 V - reduces setup/hold margin requirements in high-frequency clock distribution networks. |
| Latch-Up Immunity | Exceeds 100 mA per JESD 78 Class II - ensures robustness against transient overvoltage events in industrial environments. |
Applications
| Mobile Baseband Interface | USB 2.0 PHY Glue Logic |
|---|---|
Use Scenario: Synchronizing asynchronous control signals between 1.8-V application processor and 3.3-V USB transceiver. IC Role / Device Role / Timing Role: Level-shifting D-flip-flop providing clock-domain crossing for USB suspend/resume handshake lines. Use Value: Eliminates need for discrete level shifters; leverages 3.6-V I/O tolerance and Ioff to isolate transceiver during host sleep. |
Use Scenario: Capturing edge-aligned strobes from USB packet detector in low-power mode. IC Role / Device Role / Timing Role: Positive-edge-triggered register holding packet boundary flags for downstream DMA arbitration. Use Value: 1.5 ns tpd ensures reliable flag capture at 48-MHz USB frame rate; sub-1-V operation extends battery life. |
| Wearable Sensor Hub | Industrial PLC I/O Module |
Use Scenario: Debouncing mechanical switch inputs in hearable devices powered from 1.2-V LDO. IC Role / Device Role / Timing Role: Synchronous edge-triggered latch filtering contact bounce using system clock. Use Value: 10-µA ICC minimizes standby current; VCC range accommodates aging battery voltage down to 0.8 V. |
Use Scenario: Isolating field-side digital inputs from 24-V PLC backplane using optocoupler-compatible logic. IC Role / Device Role / Timing Role: Input synchronizer ensuring metastability-free sampling of asynchronous sensor interrupts. Use Value: CLR/PRE enable hardware reset coordination across distributed I/O modules; latch-up immunity prevents field failure. |
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 |
|---|---|---|---|
| SN74LVC1G74DCUR | Higher VCC min (1.65 V), lower drive (±24 mA at 3.3 V), no sub-1-V operation. | Requires ≥1.65 V supply; unsuitable for <1.2-V domains but offers stronger drive at 3.3 V. | Select when operating at 3.3 V with higher fan-out needs and no ultra-low-voltage requirement. |
| 74AUP1G74GW,125 | NXP part; 0.8–3.6 V range, 2.4 ns tpd at 1.2 V, ±4 mA drive at 1.2 V, different pinout (SOT353). | Slower propagation, lower drive, incompatible DCU footprint - requires PCB redesign. | Choose only if SOT353 package is mandated and 1.5 ns tpd is not critical. |
Compared with SN74LVC1G74DCUR and 74AUP1G74GW,125, the SN74AUC1G74DCURG4 uniquely combines sub-1-V operation, 1.5 ns speed at 1.8 V, and VSSOP-8 compatibility - making it optimal for space- and power-constrained high-frequency clock-domain interfaces where supply headroom is limited.
Availability
SN74AUC1G74DCURG4 is available at Aetrix Electronics and suitable for mobile baseband interfaces, USB 2.0 PHY glue logic, and wearable sensor hubs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74AUC1G74DCURG4 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 connectivity technologies, with decades of expertise in high-speed logic and low-power interface solutions.
The SN74AUC1G74 belongs to TI's AUC (Advanced Ultra-low-power CMOS) logic family, engineered specifically for high-speed, low-voltage signal integrity in portable, battery-powered, and mixed-signal systems.
FAQ
What is the minimum supply voltage at which SN74AUC1G74DCURG4 guarantees functional operation?
SN74AUC1G74DCURG4 guarantees full functionality down to 0.8 V VCC across the –40°C to 85°C temperature range, as specified in the Recommended Operating Conditions table. Below 0.8 V, timing parameters and output drive are not characterized, and operation is not assured. This sub-1-V capability makes SN74AUC1G74DCURG4 suitable for energy-harvesting and ultra-low-power wearable applications where battery voltage drops below 1.0 V.
Does SN74AUC1G74DCURG4 support hot insertion or partial power-down sequences?
Yes, SN74AUC1G74DCURG4 incorporates Ioff circuitry that disables all outputs when VCC = 0 V, preventing damaging back-current flow through the device during hot-plug or multi-rail power sequencing. This feature is explicitly validated per JEDEC JESD78 Class II latch-up testing and is critical for systems requiring controlled power-up/down order, such as modular IoT gateways or reconfigurable industrial controllers.
Can SN74AUC1G74DCURG4 safely interface a 3.3-V microcontroller GPIO with its 1.8-V supply rail?
Yes, SN74AUC1G74DCURG4 inputs tolerate up to 3.6 V regardless of VCC level, allowing direct connection of 3.3-V control signals (e.g., reset, enable) to PRE, CLR, CLK, or D pins while powered from 1.8 V. No external level shifter is needed. However, outputs (Q/Q̅) swing between 0 V and VCC (1.8 V), so downstream 3.3-V receivers require compatible VIH thresholds or additional translation.
What is the maximum clock frequency supported by SN74AUC1G74DCURG4 at 1.8 V?
At VCC = 1.8 V ± 0.15 V and TA = 25°C, SN74AUC1G74DCURG4 supports a maximum clock frequency (fmax) of 250 MHz, as measured with CL = 30 pF load. This value is confirmed in the Switching Characteristics table under "over recommended operating free-air temperature range, CL = 30 pF." At higher temperatures or larger capacitive loads, fmax decreases accordingly.
Is the VSSOP-8 (DCU) package of SN74AUC1G74DCURG4 pin-compatible with other members of the SN74AUC1Gxx series?
Yes, SN74AUC1G74DCURG4 shares identical pinout and footprint with other SN74AUC1Gxx devices offered in the VSSOP-8 (DCU) package, including SN74AUC1G00, SN74AUC1G04, SN74AUC1G08, and SN74AUC1G14. This enables drop-in replacement for logic function upgrades without PCB revision, provided timing and loading constraints are verified for the new function.
SN74AUC1G74DCURG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Clock Frequency:
- 275 MHz
- Max Propagation Delay @ V, Max CL:
- 1.8ns @ 2.5V, 30pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 9mA, 9mA
- Voltage - Supply:
- 0.8V ~ 2.7V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 2.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
SN74AUC1G74DCURG4 FAQ
1.How can I place an order for SN74AUC1G74DCURG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC1G74DCURG4 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 SN74AUC1G74DCURG4 reliable?
The price and inventory of SN74AUC1G74DCURG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC1G74DCURG4 is usually 5 days.
3.What payment methods are accepted for SN74AUC1G74DCURG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUC1G74DCURG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AUC1G74DCURG4?
SN74AUC1G74DCURG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUC1G74DCURG4 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 SN74AUC1G74DCURG4?
For technical support, including SN74AUC1G74DCURG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC1G74DCURG4 requirements.
6.How does Aetrix verify that SN74AUC1G74DCURG4 is sourced from the original manufacturer or authorized distributors?
All SN74AUC1G74DCURG4 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 SN74AUC1G74DCURG4 meets industry standards.
7.What is the process for return or replacement of SN74AUC1G74DCURG4?
All SN74AUC1G74DCURG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC1G74DCURG4, 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 SN74AUC1G74DCURG4 part is unused and in its original packaging.
Return procedure for SN74AUC1G74DCURG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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