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Texas Instruments SN74LV374DW
- Part No.:
- SN74LV374DW
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74LV374DW.pdf
- Description:
- BUS DRIVER
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Inventory:3,265
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Product details
Overview
SN74LV374DW from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2.7-V to 5.5-V VCC operation. It features ±16-mA output drive at 4.5–5.5 V, 45-MHz maximum clock frequency, and operates across −40°C to 85°C. It serves as a bus interface register in digital systems requiring bidirectional data latching and high-impedance bus isolation.
For engineers reviewing the SN74LV374DW datasheet, SN74LV374DW pinout, SN74LV374DW application, or SN74LV374DW equivalent, key selection criteria include its 20-pin SOIC (DW) package, OE-controlled 3-state outputs, setup/hold timing (7 ns / 3 ns at 5 V), ground bounce performance (<0.8 V), and compatibility with mixed-voltage 3.3-V/5-V system buses.
Technical Context
This device implements eight independent D-type latches triggered on the positive edge of CLK, with synchronous data capture and asynchronous output enable control. Each flip-flop retains state during OE assertion, enabling concurrent data loading and bus release without affecting internal storage.
The SN74LV374DW uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) 2-µm process, delivering low ground bounce (VOLP < 0.8 V) and undershoot immunity (VOHV > 2 V), alongside 2000-V HBM ESD protection and latch-up immunity exceeding 250 mA per JEDEC JESD-17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 5.5 V - supports direct interfacing with both 3.3-V and 5-V logic domains without level shifters |
| Max Clock Frequency | 45 MHz at VCC = 5 V - enables use in medium-speed control and data acquisition timing paths |
| tsu/th | 7 ns / 3 ns (5 V) - defines minimum data stability window before and after CLK↑ for reliable capture |
| IOH/IOL | −16 mA / +16 mA at 4.5–5.5 V - drives ≥10 LVTTL loads or 50-pF bus capacitance without external buffers |
| tpd (CLK→Q) | 11–19 ns (5 V, CL = 50 pF) - determines worst-case propagation delay for timing budgeting in synchronous designs |
| Output Enable Delay | ten = 10–20 ns, tdis = 8–21 ns - ensures fast, predictable bus turnaround for time-critical shared-data applications |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and instrumentation environments |
Pinout & Package
SN74LV374DW is housed in a 20-pin plastic small-outline integrated circuit (SOIC) package (DW), 7.5 mm × 12.8 mm body size, 2.65 mm max height, 1.27 mm lead pitch, and gull-wing surface-mount terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control: asserts high-impedance on all Q outputs when high; does not affect internal latch state |
| 2–9 | 1Q–8Q (Outputs) | Octal 3-state noninverting outputs; each independently driven by corresponding D input on CLK↑ |
| 10 | GND | Ground reference for all I/O and internal logic; must be low-impedance connection to minimize noise coupling |
| 11–18 | 1D–8D (Data Inputs) | Asynchronous data inputs latched into respective flip-flops on rising CLK edge |
| 19 | VCC | Positive supply rail (2.7–5.5 V); decoupling capacitor required within 10 mm of this pin |
| 20 | CLK | Clock input; edge-sensitive trigger for simultaneous capture of all eight D inputs |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs with OE Control | Enables true bidirectional bus sharing without external direction logic or pull-ups |
| High-Drive Capability (±16 mA) | Eliminates need for external bus drivers in moderate-capacitance (≤50 pF) backplane or PCB trace applications |
| Low Ground Bounce (VOLP < 0.8 V) | Maintains signal integrity during simultaneous output switching in dense digital layouts |
| Wide Supply Range (2.7–5.5 V) | Permits single-device deployment across legacy 5-V and modern 3.3-V subsystems |
| Industrial Temperature Range | Validated operation from −40°C to +85°C supports deployment in uncontrolled ambient environments |
Applications
| Industrial PLC I/O Module | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Isolating microcontroller GPIO from noisy 24-V field-side digital inputs/outputs in programmable logic controllers. IC Role / Device Role / Timing Role: Acts as an octal input latch and output buffer, synchronizing field signals to the controller clock domain while providing bus contention protection. Use Value: Enables deterministic sampling of industrial sensors via CLK edge-triggering and prevents bus conflicts using OE-controlled high-Z states during reconfiguration. |
Use Scenario: Bridging ISA or PCI local bus signals between 3.3-V FPGA and 5-V peripheral ASICs in test equipment. IC Role / Device Role / Timing Role: Functions as a voltage-tolerant, direction-agnostic bus transceiver with precise setup/hold timing compliance. Use Value: Delivers 16-mA drive at 5 V to meet TTL load requirements while accepting 3.3-V logic levels on D inputs-no level-shifter ICs needed. |
| Embedded Data Acquisition Buffer | Microcontroller Parallel Port Expander |
|
Use Scenario: Capturing parallel ADC output words (e.g., 8-bit SAR converters) synchronized to a master system clock. IC Role / Device Role / Timing Role: Serves as a clocked input register, holding sampled data stable for MCU read access over shared address/data bus. Use Value: Guarantees data validity with 7-ns setup time and eliminates metastability risk via synchronous edge-triggered capture. |
Use Scenario: Extending GPIO count of ARM Cortex-M0/M3 MCUs for driving LED arrays, relays, or LCD segments. IC Role / Device Role / Timing Role: Provides latch + 3-state output functionality to emulate additional parallel port pins under software control via OE. Use Value: Allows dynamic bus release (via OE) to share same pins with other peripherals-reducing PCB layer count and BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC374PW | Lower VCC range (1.65–3.6 V); 32-mA drive; 1.5-V to 3.3-V input thresholds only | Restricted to 3.3-V-only systems; unsuitable for 5-V bus interfacing | Select when operating exclusively at 3.3 V and higher drive or lower power is required |
| SN74ACT374N | 5-V-only supply (4.5–5.5 V); TTL-compatible inputs; higher ICC (40 µA typical) | Requires 5-V rails and generates more static power; incompatible with 3.3-V logic | Choose for legacy 5-V systems needing TTL input noise margin and faster tpd (6 ns) |
Compared with SN74LV374DW, 74LVC374PW offers superior drive but lacks 5-V tolerance, while SN74ACT374N delivers faster speed and TTL input robustness at the cost of supply inflexibility and higher quiescent current-making SN74LV374DW optimal for mixed-voltage industrial interfaces.
Availability
SN74LV374DW is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy bus interface adapters, and embedded data acquisition buffers requiring stable component supply across extended temperature ranges and mixed-voltage operation.
Supply support for SN74LV374DW 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 industrial, automotive, and communications electronics.
The SN74LV374DW belongs to TI's LV (Low-Voltage) logic family, engineered for interoperability across 2.7–5.5-V systems and optimized for noise-immune, high-drive bus interfacing in industrial control and instrumentation.
FAQ
What is the recommended decoupling strategy for SN74LV374DW?
Place a 0.1-µF ceramic capacitor between VCC (Pin 19) and GND (Pin 10), located ≤10 mm from the SN74LV374DW package. For systems with high switching activity, add a 4.7-µF bulk capacitor nearby. This minimizes supply ripple and suppresses ground bounce observed in the SN74LV374DW's EPIC™ process, especially during simultaneous output transitions.
Can SN74LV374DW operate reliably at 2.7 V with a 45-MHz clock?
No. At VCC = 2.7 V, the SN74LV374DW's maximum clock frequency is 35 MHz per its timing specifications. Attempting 45 MHz violates the device's AC characteristics and risks setup/hold violations. For full 45-MHz operation, VCC must be ≥4.5 V. Always consult the SN74LV374DW's recommended operating conditions table for voltage-dependent timing limits.
Does OE assertion affect the internal state of SN74LV374DW flip-flops?
No. OE is purely an output control signal and has no effect on internal latch operation. When OE is high, the SN74LV374DW's Q outputs enter high-impedance mode, but stored data remains intact. New data can still be clocked in via CLK and D inputs, and previously latched values persist-enabling seamless bus arbitration without data loss.
Is SN74LV374DW pin-compatible with standard 74LS374 or 74HC374 devices?
Yes, the SN74LV374DW shares identical 20-pin SOIC (DW) pinout and functional assignment with 74LS374 and 74HC374, including CLK, OE, D1–8, Q1–8, VCC, and GND locations. However, voltage thresholds, drive strength, and timing differ-so electrical compatibility must be verified per application voltage and load conditions.
What is the meaning of "EPIC™ 2-µ Process" in SN74LV374DW documentation?
EPIC™ (Enhanced-Performance Implanted CMOS) is Texas Instruments' proprietary 2-µm CMOS fabrication process used for the SN74LV374DW. It delivers improved noise immunity, lower ground bounce (<0.8 V), higher latch-up immunity (>250 mA), and robust ESD protection (2000 V HBM)-critical for reliable operation in electrically noisy industrial environments where the SN74LV374DW is commonly deployed.
SN74LV374DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LV374DW FAQ
1.How can I place an order for SN74LV374DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV374DW 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 SN74LV374DW reliable?
The price and inventory of SN74LV374DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV374DW is usually 5 days.
3.What payment methods are accepted for SN74LV374DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV374DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV374DW?
SN74LV374DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV374DW 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 SN74LV374DW?
For technical support, including SN74LV374DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV374DW requirements.
6.How does Aetrix verify that SN74LV374DW is sourced from the original manufacturer or authorized distributors?
All SN74LV374DW 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 SN74LV374DW meets industry standards.
7.What is the process for return or replacement of SN74LV374DW?
All SN74LV374DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV374DW, 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 SN74LV374DW part is unused and in its original packaging.
Return procedure for SN74LV374DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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