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Texas Instruments SN74LVC374AQDWREP
- Part No.:
- SN74LVC374AQDWREP
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC374AQDWREP.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,038
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Product details
Overview
SN74LVC374AQDWREP from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2.0 V to 3.6 V operation. It features 8 independent D-flip-flops, positive-edge clock triggering, output-enable control (OE), and Ioff partial-power-down support. Used in bus interface logic, I/O port expansion, and register buffering in industrial control and data acquisition systems.
For engineers reviewing the SN74LVC374AQDWREP datasheet, SN74LVC374AQDWREP pinout, SN74LVC374AQDWREP application, or SN74LVC374AQDWREP equivalent, key selection criteria include tpd ≤ 8.5 ns at 3.3 V, 3.6 V absolute max supply, 5.5 V-tolerant inputs, –40°C to 125°C extended temperature range, and SOIC-20 package compatibility with legacy LVC logic families.
Technical Context
This device implements eight synchronous D-type latches triggered on the rising edge of CLK, with independent data capture and output enable control. Each flip-flop has a dedicated D input and Q output, and all outputs share a common OE terminal that places them simultaneously in high-impedance state without affecting internal latch states.
It supports mixed-voltage system interfacing via 5.5 V-tolerant inputs while operating from a 2.0–3.6 V VCC rail, and includes Ioff circuitry to prevent backflow current during partial power-down - critical for hot-swap and power-gating applications in ruggedized embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - ensures compatibility with 3.3 V logic domains and low-power operation |
| Input Voltage Tolerance | Up to 5.5 V - enables direct connection to 5 V microcontrollers or legacy peripherals without level shifters |
| Max Propagation Delay | 8.5 ns at VCC = 3.3 V - supports ≥100 MHz clock operation in high-speed digital interfaces |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - sufficient to drive 50 pF loads or terminated transmission lines directly |
| Ioff Support | Yes - disables outputs and blocks reverse current flow when VCC = 0 V, enabling safe partial power-down |
| Operating Temperature | –40°C to +125°C - qualified for extended-temperature industrial and automotive under-hood environments |
| 3-State Output Leakage | ±15 µA at VCC = 3.6 V - minimizes bus leakage and signal integrity degradation in high-impedance mode |
Pinout & Package
SN74LVC374AQDWREP is housed in a 20-pin SOIC (DW) package with standard 0.300-inch body width and 0.050-inch lead pitch. The package is RoHS-compliant, moisture sensitivity level 1, and rated for reflow up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (1D–8D) | Asynchronous D inputs for each of eight flip-flops; accept 0–5.5 V signals regardless of VCC |
| 9 | GND | Ground reference for all internal logic and output drivers |
| 10 | VCC | Primary power supply (2.0–3.6 V); powers internal logic and output buffers |
| 11, 13, 14, 15, 16, 17, 18, 19 | Outputs (1Q–8Q) | 3-state buffered outputs; driven high/low or placed in high-Z by OE control |
| 12 | CLK | Positive-edge-triggered clock input; synchronizes all eight flip-flops simultaneously |
| 20 | OE | Active-low output-enable; controls all eight outputs collectively without affecting internal latch states |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs | Enables bidirectional bus sharing without external pull-ups or direction control logic |
| 5.5 V-Tolerant Inputs | Eliminates need for voltage translators when interfacing with 5 V controllers or sensors |
| Ioff Partial-Power-Down | Prevents damaging back-current during VCC ramp-down, supporting hot-plug and power sequencing |
| Low Ground Bounce (VOLP) | Typical <0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent signal paths |
| Extended Temp Range | –40°C to +125°C operation - validated per JEDEC JESD22-A108 for reliability in harsh environments |
Applications
| Industrial PLC I/O Expansion | Automotive Sensor Interface Module |
|---|---|
Use Scenario: Adding isolated digital input/output capability to programmable logic controllers using modular backplane buses. IC Role / Device Role / Timing Role: Acts as an octal register buffer between field-side optocoupled inputs and the 3.3 V controller bus, synchronized by system clock. Use Value: Enables deterministic sampling of 8 sensor channels on one clock edge while isolating bus loading via 3-state control during data read cycles. | Use Scenario: Aggregating status signals from multiple CAN/LIN node sensors in engine control units before routing to MCU GPIOs. IC Role / Device Role / Timing Role: Serves as a level-translating input latch, capturing 5 V sensor outputs and presenting clean 3.3 V-compatible signals to the MCU. Use Value: Eliminates discrete level shifters and reduces component count while maintaining timing integrity across temperature extremes. |
| Test Equipment Digital Pattern Generator | Ruggedized Data Acquisition Front-End |
Use Scenario: Generating precise parallel stimulus patterns for IC functional testing under automated test equipment (ATE) control. IC Role / Device Role / Timing Role: Functions as a clocked output register, holding pattern bits until triggered by ATE strobe, then driving DUT pins simultaneously. Use Value: Delivers sub-9 ns propagation delay and tight skew (<1.5 ns) across all 8 outputs for deterministic timing margins. | Use Scenario: Buffering analog-to-digital converter parallel outputs in high-noise industrial monitoring systems with long trace runs. IC Role / Device Role / Timing Role: Provides high-drive, low-noise latching of ADC result words prior to serialization or FPGA ingestion. Use Value: Reduces ground bounce-induced measurement error through VOLP <0.8 V and supports 50 pF bus capacitance without signal degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC374APWREP | TSSOP-20 package; 83°C/W θJA vs. 58°C/W for SOIC; identical electrical specs | Better board space efficiency but lower thermal performance; requires tighter layout control for high-duty-cycle operation | Select for compact PCBs where thermal margin allows; verify junction temperature under worst-case load |
| SN74LVCH16374ADGGR | 16-bit version in 48-pin TSSOP; dual 8-bit banks with separate OE; higher drive (±32 mA) | Supports wider data buses and independent bank control; not pin-compatible; requires redesign | Choose when expanding to 16-bit parallel interfaces or needing bank-select isolation in multi-channel systems |
Compared with SN74LVC374APWREP, the SN74LVC374AQDWREP offers superior thermal dissipation in SOIC packaging for sustained high-frequency operation; versus SN74LVCH16374ADGGR, it provides minimal footprint and cost for 8-bit-only applications without overengineering.
Availability
SN74LVC374AQDWREP is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC374AQDWREP 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 for industrial, automotive, and communications markets.
The SN74LVC374A-EP product line delivers enhanced plastic packaged logic devices engineered for extended-temperature operation and reliability-critical applications including avionics, motor control, and infrastructure monitoring.
FAQ
What is the maximum clock frequency supported by SN74LVC374AQDWREP?
The SN74LVC374AQDWREP supports a maximum clock frequency of 100 MHz at VCC = 3.3 V ± 0.3 V, as specified in the timing requirements table. This is enabled by its 8.5 ns typical propagation delay (tpd) and 3.3 ns minimum pulse width (tw) for CLK high/low. Operation at this rate assumes proper signal integrity, controlled impedance routing, and adequate decoupling near the VCC pin.
Does SN74LVC374AQDWREP support partial power-down functionality?
Yes, SN74LVC374AQDWREP includes Ioff circuitry that disables all outputs and prevents backflow current when VCC = 0 V, even if input or output voltages remain present. This feature is fully characterized per JEDEC standards and allows safe use in hot-swap or power-gated subsystems without external protection components.
Can SN74LVC374AQDWREP interface directly with 5 V logic inputs?
Yes, SN74LVC374AQDWREP accepts input voltages up to 5.5 V on all D, CLK, and OE pins while operating from a 2.0–3.6 V VCC supply. This eliminates the need for external level-shifting circuitry when connecting to 5 V microcontrollers, sensors, or legacy peripherals in mixed-voltage systems.
What is the recommended OE pin handling during power-up for SN74LVC374AQDWREP?
To ensure outputs remain in high-impedance state during power-up, OE should be tied to VCC through a pullup resistor. TI specifies a minimum resistance determined by the driver's current-sinking capability; a 10 kΩ resistor is commonly used and verified to maintain Z-state across the full –40°C to 125°C range for SN74LVC374AQDWREP.
Is SN74LVC374AQDWREP pin-compatible with standard SN74LVC374A variants?
Yes, SN74LVC374AQDWREP shares identical pinout, electrical behavior, and timing characteristics with commercial-grade SN74LVC374ADW, differing only in extended temperature qualification (–40°C to 125°C), enhanced manufacturing pedigree, and EP-level screening - making it a drop-in replacement in existing SOIC-20 layouts requiring higher reliability.
SN74LVC374AQDWREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 8.5ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LVC374AQDWREP FAQ
1.How can I place an order for SN74LVC374AQDWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC374AQDWREP 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 SN74LVC374AQDWREP reliable?
The price and inventory of SN74LVC374AQDWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC374AQDWREP is usually 5 days.
3.What payment methods are accepted for SN74LVC374AQDWREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC374AQDWREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC374AQDWREP?
SN74LVC374AQDWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC374AQDWREP 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 SN74LVC374AQDWREP?
For technical support, including SN74LVC374AQDWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC374AQDWREP requirements.
6.How does Aetrix verify that SN74LVC374AQDWREP is sourced from the original manufacturer or authorized distributors?
All SN74LVC374AQDWREP 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 SN74LVC374AQDWREP meets industry standards.
7.What is the process for return or replacement of SN74LVC374AQDWREP?
All SN74LVC374AQDWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC374AQDWREP, 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 SN74LVC374AQDWREP part is unused and in its original packaging.
Return procedure for SN74LVC374AQDWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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