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Texas Instruments SN74LV374ADW
- Part No.:
- SN74LV374ADW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LV374ADW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:750
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Product details
Overview
SN74LV374ADW from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2 V to 5.5 V operation, featuring 9.5 ns maximum propagation delay at 5 V, Ioff partial-power-down support, and mixed-mode voltage operation across all ports. It serves as a bus interface register in industrial PLCs and analog input modules.
For engineers reviewing the SN74LV374ADW datasheet, SN74LV374ADW pinout, SN74LV374ADW application, or SN74LV374ADW equivalent, key selection criteria include its 20-pin SOIC (DW) package, guaranteed 3-state output control via OE, -40°C to +125°C operating range, and compatibility with 3.3 V/5 V mixed-voltage systems.
Technical Context
The SN74LV374ADW implements eight independent D-type latches triggered on the rising edge of CLK, each with individually controllable 3-state outputs enabled by a common active-low OE signal. Its Ioff circuitry disables outputs during power-down to prevent backflow current, and its low ground bounce (<0.8 V at 3.3 V) ensures signal integrity when driving capacitive loads.
It supports true mixed-mode operation: inputs tolerate up to 5.5 V regardless of VCC, enabling level translation from higher-voltage logic domains into 2.5 V/3.3 V systems. The device operates reliably across full industrial temperature range (-40°C to +125°C) with thermal resistance RθJA = 102.3°C/W in the DW package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables interoperability across 2.5 V, 3.3 V, and 5 V logic domains |
| tpd (max) | 9.5 ns at 5 V - supports >100 MHz system clocking with timing margin |
| Output Drive | ±16 mA at 5 V - sufficient for direct drive of 50 pF bus loads without external buffers |
| Ioff Support | Yes - prevents damaging current flow during partial power-down in multi-rail systems |
| Operating Temp | -40°C to +125°C - qualified for industrial and transportation environments |
| ESD Rating | ±2000 V HBM - meets standard handling requirements for automated assembly |
| Input Voltage Tolerance | Up to 5.5 V - allows interfacing with legacy 5 V logic while powered from 3.3 V |
Pinout & Package
SN74LV374ADW uses a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with standard 0.050″ (1.27 mm) lead pitch and gull-wing leads. Thermal resistance is RθJA = 102.3°C/W, suitable for moderate-power industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Asserting low enables all eight Q outputs; high places them in high-impedance state |
| 2–9, 12, 15–19 (Q1–Q8) | 3-state outputs | Reflect D-input states on CLK↑ when OE is low; tri-stated otherwise |
| 3–4, 7–8, 13–14, 17–18 (D1–D8) | Data inputs | Sampled on rising CLK edge; tolerate up to 5.5 V regardless of VCC |
| 11 (CLK) | Clock input | Rising-edge sensitive; minimum pulse width 5 ns at 5 V |
| 10 (GND) | Ground reference | Primary return path for all internal logic and output currents |
| 20 (VCC) | Power supply | Supplies core logic and output drivers; decoupling required per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs accept 0–5.5 V while VCC = 2–5.5 V - eliminates level shifters in heterogeneous logic interfaces |
| Ioff partial-power-down protection | Outputs disable automatically when VCC = 0 V - prevents backfeed in hot-swap or multi-supply systems |
| Low ground bounce (VOLP) | <0.8 V at 3.3 V - maintains noise margin for non-switching outputs during simultaneous switching |
| Guaranteed 3-state timing | ten = 10 ns, tdis = 9 ns max at 5 V - enables precise bus arbitration and hold-time control |
| Latch-up immunity | >250 mA per JESD17 - ensures robustness against transient overcurrent events |
Applications
| Programmable Logic Controller (PLC) | DCS and PAC: Analog Input Module |
|---|---|
Use Scenario: Isolating and latching sensor data from multiple analog-to-digital converters before transmission to a central controller. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as synchronized input register; CLK aligned to ADC conversion completion, OE controlled for bus release. Use Value: Ensures deterministic sampling window and eliminates metastability risk between asynchronous ADCs and synchronous processor bus. | Use Scenario: Buffering multiplexed analog channel readings onto a shared backplane bus in distributed control systems. IC Role / Device Role / Timing Role: 3-state output register providing isolated, glitch-free data staging; OE coordinated with bus arbitration logic. Use Value: Prevents bus contention during channel scanning and supports hot-swappable I/O module insertion. |
| Trains, Trams, and Subway Carriages | AC Inverter Drives |
Use Scenario: Capturing status signals from door sensors, brake interlocks, and HVAC subsystems in rail vehicle control units. IC Role / Device Role / Timing Role: Industrial-grade input latch synchronizing safety-critical signals to the main controller clock domain. Use Value: Meets -40°C to +125°C ambient requirement and provides Ioff protection during battery brownouts. | Use Scenario: Interfacing microcontroller PWM outputs to gate driver ICs in motor control inverters. IC Role / Device Role / Timing Role: Level-translating and isolating control signals between 3.3 V MCU and 5 V gate driver logic rails. Use Value: Input overvoltage tolerance eliminates external clamping diodes; 3-state outputs allow shared control bus among multiple inverter phases. |
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 |
|---|---|---|---|
| SN74LVC374A | Lower VCC min (1.65 V), faster tpd (6.7 ns @ 3.3 V), but no Ioff support | Suitable for low-voltage portable systems; not recommended for partial-power-down designs | Choose SN74LVC374A only if operating below 2 V or requiring sub-7 ns speed; retain SN74LV374ADW for industrial power sequencing. |
| 74ACT374 | Higher drive (±24 mA), TTL-compatible inputs, but narrower VCC range (4.5–5.5 V) and no Ioff | Better for legacy 5 V-only systems with heavy bus loading; incompatible with mixed-voltage or power-gated architectures | Select 74ACT374 only for pure 5 V designs needing stronger drive; SN74LV374ADW remains preferred for modern 3.3 V/5 V hybrid systems. |
Compared with SN74LVC374A and 74ACT374, the SN74LV374ADW uniquely balances wide VCC range (2–5.5 V), industrial temperature rating, and Ioff protection-making it the sole choice for mixed-rail industrial controllers where power sequencing and voltage translation coexist.
Availability
SN74LV374ADW is available at Aetrix Electronics and suitable for programmable logic controllers, distributed control systems, rail vehicle electronics, and AC inverter drives requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV374ADW 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The SN74LV374ADW belongs to TI's LV logic family, engineered specifically for robust, low-power, mixed-voltage bus interfacing in harsh industrial environments.
FAQ
What is the maximum clock frequency supported by the SN74LV374ADW at 3.3 V?
The SN74LV374ADW supports up to 150 MHz maximum clock frequency at 3.3 V with 15 pF load, as specified in Section 6.7 of the datasheet. At 50 pF load, the maximum frequency drops to 110 MHz. These values are guaranteed across the full -40°C to +125°C operating range, with timing margins validated under worst-case process, voltage, and temperature conditions. The SN74LV374ADW achieves this performance while maintaining low ground bounce and Ioff protection.
Does the SN74LV374ADW support partial power-down operation?
Yes, the SN74LV374ADW includes Ioff circuitry that disables all outputs when VCC = 0 V, preventing damaging current backflow in multi-rail systems during power sequencing or fault conditions. This feature is explicitly documented in the Features section and Electrical Characteristics table (Ioff ≤ 5 µA). The Ioff capability makes SN74LV374ADW suitable for applications like hot-pluggable I/O modules and systems with staggered power-up sequences.
What is the pin configuration of the SN74LV374ADW package?
The SN74LV374ADW uses a 20-pin SOIC (DW) package with standard pinout: Pin 1 = OE (active-low output enable), Pins 2–9 and 12, 15–19 = Q1–Q8 outputs, Pins 3–4, 7–8, 13–14, 17–18 = D1–D8 inputs, Pin 10 = GND, Pin 11 = CLK, Pin 20 = VCC. This matches the DW package drawing in TI's SCLS408L datasheet and is identical across all 20-pin variants (DB, NS, PW) except for physical dimensions and thermal metrics.
Can the SN74LV374ADW interface directly with 5 V logic while powered from 3.3 V?
Yes, the SN74LV374ADW inputs are overvoltage tolerant up to 5.5 V regardless of VCC level, allowing direct connection to 5 V logic signals when powered from 3.3 V. This mixed-mode operation is confirmed in Section 1 (Features) and Section 6.3 (Recommended Operating Conditions). The SN74LV374ADW outputs swing rail-to-rail (0 V to VCC), so 3.3 V outputs must be received by 3.3 V–tolerant inputs unless level translation is added externally.
What is the thermal resistance (RθJA) of the SN74LV374ADW in its SOIC package?
The SN74LV374ADW in the DW (SOIC-20) package has a junction-to-ambient thermal resistance (RθJA) of 102.3°C/W, as updated in Revision L (March 2023) of the datasheet. This value assumes standard JEDEC 2-layer board test conditions and is critical for thermal design in enclosed industrial enclosures. The higher RθJA compared to NS (76.7°C/W) reflects the DW package's larger body size and lower surface-area-to-volume ratio.
SN74LV374ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 170 MHz
- Max Propagation Delay @ V, Max CL:
- 10.1ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 2.9 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LV374ADW FAQ
1.How can I place an order for SN74LV374ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV374ADW 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 SN74LV374ADW reliable?
The price and inventory of SN74LV374ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV374ADW is usually 5 days.
3.What payment methods are accepted for SN74LV374ADW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV374ADW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV374ADW?
SN74LV374ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV374ADW 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 SN74LV374ADW?
For technical support, including SN74LV374ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV374ADW requirements.
6.How does Aetrix verify that SN74LV374ADW is sourced from the original manufacturer or authorized distributors?
All SN74LV374ADW 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 SN74LV374ADW meets industry standards.
7.What is the process for return or replacement of SN74LV374ADW?
All SN74LV374ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV374ADW, 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 SN74LV374ADW part is unused and in its original packaging.
Return procedure for SN74LV374ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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