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Texas Instruments SN74LVC1G74DQER
- Part No.:
- SN74LVC1G74DQER
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 8-XFDFN
- Datasheet:
-
SN74LVC1G74DQER.pdf
- Description:
- IC FF D-TYPE SNGL 1BIT 8X2SON
- Quantity:
- Payment:
- Shipping:
Inventory:13,711
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Product details
Overview
SN74LVC1G74DQER from Texas Instruments is a single positive-edge-triggered D-type flip-flop with asynchronous clear (CLR) and preset (PRE), designed for 1.65-V to 5.5-V operation, featuring 5.9-ns max propagation delay at 3.3 V, ±24-mA output drive, and Ioff support for live insertion in partial-power-down systems. It serves as a compact, low-power storage element in timing-critical digital interfaces.
For engineers reviewing the SN74LVC1G74DQER datasheet, SN74LVC1G74DQER pinout, SN74LVC1G74DQER application, or SN74LVC1G74DQER equivalent, key selection considerations include its X2SON-8 package footprint, 125°C operating temperature rating, voltage-level translation capability (e.g., 5-V input to 3.3-V VCC), and guaranteed Ioff behavior for back-drive protection during power sequencing.
Technical Context
This device implements a synchronous edge-triggered storage cell with dual active-low asynchronous controls (PRE and CLR), where clock triggering occurs at a defined voltage threshold-not dependent on input slew rate. Its logic core operates across 1.65–5.5 V, enabling interoperability between mixed-voltage domains.
The integrated Ioff circuit disables outputs when VCC = 0 V, blocking reverse current flow from powered I/Os into the unpowered device. Input tolerance up to 5.5 V allows direct connection to 5-V buses while operating from lower VCC, supporting down-translation without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - Enables use in 1.8-V, 2.5-V, 3.3-V, and 5-V systems with single-supply flexibility. |
| tpd (max) | 5.9 ns at VCC = 3.3 V - Supports >175-MHz clock operation in high-speed control paths. |
| Ioff Current | ±10 µA max - Ensures safe live insertion and prevents damaging back-current during partial power-down. |
| Output Drive | ±24 mA at VCC = 3.3 V - Sufficient to directly drive multiple LVC inputs or small capacitive loads without buffering. |
| Input Voltage Range | 0 V to 5.5 V - Allows 5-V-tolerant inputs even when VCC = 1.8 V, eliminating external clamping diodes. |
| Operating Temp | –40°C to +125°C - Qualified for automotive under-hood and industrial motor-control environments. |
| ESD Rating | 2000-V HBM - Meets JEDEC JESD22-A114 for robust handling in automated assembly lines. |
Pinout & Package
X2SON-8 (DQE) package: 1.40 mm × 1.00 mm, 0.5-mm pitch, bottom-exposed thermal pad, no leads - optimized for space-constrained PCB layouts and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CLK | Clock input | Positive-edge-sensitive control signal; triggers Q/Q update only on rising transition meeting VIH/VIL thresholds. |
| 2 D | Data input | Holds next-state value; sampled at CLK edge if PRE/CLR are inactive (high). |
| 3 Q | Non-inverted output | Reflects stored D value after CLK edge; drives downstream logic with rail-to-rail swing. |
| 4 GND | Ground reference | Primary return path for all internal currents and output loads; must be low-impedance. |
| 5 Q | Inverted output | Complement of Q; enables direct implementation of toggle or set/reset latch functions. |
| 6 CLR | Asynchronous clear | Active-low reset: forces Q = 0, Q = 1 regardless of CLK or D state. |
| 7 PRE | Asynchronous preset | Active-low set: forces Q = 1, Q = 0 regardless of CLK or D state. |
| 8 VCC | Power supply | Single supply for logic core and I/Os; bypass capacitor required within 2 mm for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ X2SON packaging | Die-as-package construction eliminates leadframe, reducing size to 1.4 mm × 1.0 mm and improving thermal resistance (RθJA = 261°C/W). |
| Voltage-level translation | Accepts 5.5-V inputs at any VCC from 1.65 V to 5.5 V - enables direct interfacing between 5-V legacy peripherals and 1.8-/3.3-V controllers. |
| Ioff partial-power-down | Disables outputs when VCC = 0 V - prevents back-driving damage during hot-plug or staggered power-up sequences. |
| Low dynamic power | 10-µA max ICC - minimizes quiescent current in always-on subsystems such as power-button debouncing circuits. |
| Robust ESD immunity | 2000-V HBM, 1000-V CDM - exceeds JEDEC standards for manufacturing and field reliability in industrial settings. |
Applications
| LED Display Row Drivers | Industrial Motor Control Logic |
|---|---|
Use Scenario: Driving column select lines in multiplexed LED signage with precise timing and glitch-free state retention. IC Role / Device Role / Timing Role: Stores scan-row enable state synchronized to master clock; PRE/CLR ensures deterministic startup and fault recovery. Use Value: 5.9-ns tpd guarantees sub-6-ns setup/hold margin at 100-MHz refresh rates; ±24-mA drive directly sources LED sink drivers without buffer stages. |
Use Scenario: Implementing direction latching and enable sequencing in BLDC motor gate-driver interface logic. IC Role / Device Role / Timing Role: Captures MCU direction command on clock edge; asynchronous CLR resets state on fault interrupt. Use Value: –40°C to +125°C rating supports operation near motor windings; Ioff prevents backfeed from powered gate-driver rails during MCU sleep. |
| Telecom Line Card Status Latching | Server Baseboard Management (BMC) I/O Expansion |
Use Scenario: Capturing link-up/down events from SFP+ modules and holding status for BMC polling over I²C. IC Role / Device Role / Timing Role: Edge-triggered capture of hot-plug detect signals; Q output feeds GPIO expander input. Use Value: 5.5-V input tolerance accepts open-drain 3.3-V or 5-V hot-plug signals directly; low ICC extends standby battery life. |
Use Scenario: Expanding BMC-controlled reset and configuration signals to peripheral slots in modular server chassis. IC Role / Device Role / Timing Role: Provides isolated, glitch-free reset assertion to add-in cards using PRE/CLR for hardware-initiated recovery. Use Value: X2SON-8 footprint saves board area in dense BMC daughterboards; 1.65-V min VCC supports low-power BMC domains. |
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 | VSSOP-8 (2.3 mm × 2.0 mm) package; RθJA = 227°C/W; same electrical specs and pinout. | Better thermal performance and hand-solderability; requires larger PCB area than X2SON. | Select when thermal management or reworkability outweighs space constraints. |
| SN74LVC1G74RSE2 | UQFN-8 (1.5 mm × 1.5 mm); RθJA = 243°C/W; identical function, timing, and I/O specs. | Intermediate footprint size and thermal resistance; exposed pad compatible with standard reflow profiles. | Choose for balanced trade-off between miniaturization and manufacturability in high-volume telecom modules. |
Compared with SN74LVC1G74DCUR and SN74LVC1G74RSE2, the SN74LVC1G74DQER offers the smallest footprint (1.4 mm × 1.0 mm) and highest board-area efficiency, making it optimal for ultra-compact designs where thermal load is moderate and automated assembly is used.
Availability
SN74LVC1G74DQER is available at Aetrix Electronics and suitable for industrial motor control, telecom infrastructure, LED display systems, and server BMC expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC1G74DQER 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 expertise in high-reliability interface and timing components.
The SN74LVC1G74 belongs to TI's LVC logic family-designed for low-voltage, high-speed, mixed-signal interfacing in space-constrained, thermally demanding applications including industrial automation and communications equipment.
FAQ
What is the maximum clock frequency supported by SN74LVC1G74DQER?
The SN74LVC1G74DQER supports a maximum clock frequency of 200 MHz at VCC = 5 V and –40°C to +125°C, with 175 MHz guaranteed at VCC = 3.3 V under the same temperature range. These values derive from the minimum clock pulse width (tw = 2 ns at VCC = 5 V) and propagation delay (tpd ≤ 4.1 ns), ensuring reliable edge-triggered operation in high-speed control loops.
Does SN74LVC1G74DQER support partial power-down, and how is it implemented?
Yes, SN74LVC1G74DQER supports partial power-down via its Ioff feature. When VCC = 0 V, the Ioff circuitry actively disables all outputs, limiting leakage current to ±10 µA and preventing back-current flow from externally powered I/O lines. This behavior is specified across –40°C to +125°C and enables safe hot-insertion in modular systems.
What package type is used for SN74LVC1G74DQER, and what are its key mechanical properties?
SN74LVC1G74DQER uses the X2SON-8 (DQE) package: 1.40 mm × 1.00 mm body size, 0.5-mm pitch, 8-terminal layout with bottom-exposed thermal pad. Its NanoFree™ construction eliminates leads, reducing parasitic inductance and enabling ultra-dense placement-ideal for portable and telecom modules where PCB real estate is constrained.
Can SN74LVC1G74DQER accept 5-V input signals while operating from a 1.8-V supply?
Yes, SN74LVC1G74DQER accepts input voltages up to 5.5 V independent of VCC, enabling true 5-V-tolerant operation at VCC = 1.8 V. This allows direct connection to 5-V microcontrollers or sensors without level-shifting circuitry-verified by VIH/VIL specifications and input clamp-current ratings in the datasheet.
How does the asynchronous PRE and CLR functionality behave in SN74LVC1G74DQER?
In SN74LVC1G74DQER, PRE and CLR are active-low asynchronous controls: pulling PRE low forces Q = 1 and Q = 0 immediately, while pulling CLR low forces Q = 0 and Q = 1-both overriding clock and data inputs. When both are low, outputs enter a metastable non-persistent state (Q = Q = 1), reverting to prior state once either control returns high.
SN74LVC1G74DQER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-XFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Clock Frequency:
- 200 MHz
- Max Propagation Delay @ V, Max CL:
- 4.4ns @ 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:
- 5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-X2SON (1.4x1)
SN74LVC1G74DQER FAQ
1.How can I place an order for SN74LVC1G74DQER through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G74DQER 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 SN74LVC1G74DQER reliable?
The price and inventory of SN74LVC1G74DQER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G74DQER is usually 5 days.
3.What payment methods are accepted for SN74LVC1G74DQER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G74DQER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC1G74DQER?
SN74LVC1G74DQER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G74DQER 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 SN74LVC1G74DQER?
For technical support, including SN74LVC1G74DQER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G74DQER requirements.
6.How does Aetrix verify that SN74LVC1G74DQER is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G74DQER 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 SN74LVC1G74DQER meets industry standards.
7.What is the process for return or replacement of SN74LVC1G74DQER?
All SN74LVC1G74DQER units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G74DQER, 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 SN74LVC1G74DQER part is unused and in its original packaging.
Return procedure for SN74LVC1G74DQER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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