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Texas Instruments SN74LVTH374PW
- Part No.:
- SN74LVTH374PW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH374PW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:869
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Product details
Overview
SN74LVTH374PW from Texas Instruments is an octal edge-triggered D-type flip-flop IC designed for 3.3-V VCC operation with 5-V tolerant inputs and outputs, supporting mixed-mode signal interfacing between 3.3-V logic and legacy 5-V systems. It features bus-hold on all data inputs, Ioff and power-up 3-state for hot insertion, and operates down to 2.7 V supply voltage. It is used in address/data latching, bus buffering, and level-shifting applications in industrial control and communications backplanes.
For engineers reviewing the SN74LVTH374PW datasheet, SN74LVTH374PW pinout, SN74LVTH374PW application, or SN74LVTH374PW equivalent, key selection criteria include its 20-pin TSSOP package, 150-MHz maximum clock frequency, ±64-mA output drive capability, bus-hold input retention, and support for unregulated battery operation - all critical for robust 3.3-V/5-V interface design.
Technical Context
The SN74LVTH374PW implements eight independent positive-edge-triggered D flip-flops with a shared clock (CLK) and buffered output-enable (OE) control. OE places all Q outputs in high-impedance without affecting internal state retention or data capture timing.
Its architecture integrates active bus-hold circuitry on all D inputs (eliminating external pull resistors), Ioff protection during power-down, and power-up 3-state behavior that ensures outputs remain high-Z until VCC exceeds 1.5 V - enabling safe hot-plug operation in modular systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports wide-input unregulated battery rails and low-noise 3.3-V supply domains. |
| Input Voltage Tolerance | −0.5 V to 7 V - enables direct connection to 5-V TTL buses without level shifters. |
| Max Clock Frequency | 150 MHz - suitable for high-speed data capture in memory interfaces and digital control loops. |
| IOL/IOH | 64 mA / −32 mA - drives heavy capacitive loads and multiple CMOS/TTL inputs without external buffers. |
| tsu/th | 1.5 ns / 0.8 ns - tight timing margins enable reliable synchronization in fast synchronous buses. |
| Bus-Hold Current | ±750 µA max - actively holds unused D inputs at valid logic levels, preventing floating-induced noise coupling. |
| θJA | 83 °C/W - thermal performance validated for TSSOP-20 package under standard JEDEC PCB conditions. |
Pinout & Package
TSSOP-20 (PW) package: 6.4 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D1–D8 Data Inputs | Edge-triggered data inputs with integrated bus-hold; no external pull resistors required. |
| 9 | OE Output Enable | Active-low control; places all Q outputs in high-impedance without affecting internal flip-flop state. |
| 10 | GND | Ground reference for all logic and output stages; must be low-inductance connection. |
| 11 | VCC | 3.3-V supply input; decoupling capacitor required within 1 cm of pin per TI layout guidelines. |
| 12, 13, 14, 15, 16, 17, 18, 19 | Q1–Q8 Outputs | CMOS-compatible outputs with 64-mA sink capability; support hot-swap bus driving. |
| 20 | CLK | Positive-edge clock input; synchronizes all eight D-to-Q transfers simultaneously. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode I/O | 5-V tolerant inputs/outputs with 3.3-V VCC - eliminates level translators in 3.3-V/5-V interconnects. |
| Bus-Hold Circuitry | Active retention on all D inputs - prevents metastability and EMI from floating nodes in unterminated buses. |
| Ioff Protection | ±100 µA max leakage when VCC = 0 - blocks damaging backflow current during hot insertion or partial power-down. |
| Power-Up 3-State | Outputs remain high-Z until VCC > 1.5 V - avoids bus contention during power sequencing. |
| Output Ground Bounce | VOLP < 0.8 V at VCC = 3.3 V - reduces switching noise in dense PCB layouts with shared ground planes. |
Applications
| Industrial PLC Backplane Interface | Memory Address Latching |
|---|---|
|
Use Scenario: Interfacing 3.3-V microcontroller address/data buses to legacy 5-V peripheral modules in programmable logic controllers. IC Role / Device Role / Timing Role: Octal D flip-flop latches address bits on CLK edge while OE isolates bus during arbitration cycles. Use Value: Eliminates discrete level shifters and pull resistors, reducing BOM count and board area by >30% versus discrete solutions. |
Use Scenario: Capturing and holding memory address signals in FPGA-based embedded systems with asynchronous memory access. IC Role / Device Role / Timing Role: Synchronizes volatile address lines to system clock domain and provides bus-isolated output staging. Use Value: Enables deterministic setup/hold timing (1.5 ns/0.8 ns) and 150-MHz operation for high-bandwidth SRAM/Flash access. |
| Hot-Swappable Module Control | Communications Bus Buffering |
|
Use Scenario: Enabling safe insertion/removal of field-replaceable I/O modules in telecom chassis without powering down the backplane. IC Role / Device Role / Timing Role: Provides Ioff-protected, power-up 3-state outputs to prevent bus conflicts during module power sequencing. Use Value: Meets Telcordia GR-63-CORE hot-insertion requirements via built-in Ioff and controlled output enable behavior. |
Use Scenario: Driving long parallel control buses (e.g., LCD column drivers, sensor array interfaces) with high capacitive loading. IC Role / Device Role / Timing Role: Buffers and isolates control signals using high-drive (64-mA) outputs with low propagation delay (≤5.6 ns). Use Value: Maintains signal integrity across 100+ pF loads without waveform degradation or timing skew across channels. |
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 |
|---|---|---|---|
| SN74LVC374APW | No bus-hold; 3.3-V only I/O (not 5-V tolerant); lower IOL (24 mA); no Ioff. | Suitable only in fully 3.3-V systems with external pull resistors and controlled power sequencing. | Select when cost sensitivity outweighs mixed-voltage interface needs and bus-hold is unnecessary. |
| 74ALVCH374PW | Higher speed (200 MHz); same 5-V tolerant I/O; identical TSSOP-20 footprint; no bus-hold. | Better for high-frequency clock domains but requires external termination for unused inputs. | Choose when >150-MHz operation is required and bus-hold can be implemented externally. |
Compared with SN74LVC374APW and 74ALVCH374PW, the SN74LVTH374PW uniquely combines 5-V tolerance, integrated bus-hold, Ioff, and power-up 3-state - making it the only option among the three qualified for unregulated battery-powered hot-swap systems interfacing legacy 5-V peripherals.
Availability
SN74LVTH374PW is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, memory address latching, hot-swappable module control, and communications bus buffering requiring stable component supply and long-term lifecycle support.
Supply support for SN74LVTH374PW 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 50 years of innovation in high-reliability interface and timing products.
The SN74LVTH374PW belongs to TI's LVTH logic family, engineered specifically for robust mixed-voltage system interfacing, hot-insertion compliance, and industrial-grade signal integrity in harsh electromagnetic environments.
FAQ
What is the operating voltage range for SN74LVTH374PW?
The SN74LVTH374PW operates from 2.7 V to 3.6 V on VCC. Its inputs tolerate up to 7 V, and outputs swing rail-to-rail within the VCC domain. This allows direct interfacing with 5-V TTL systems while powered from a 3.3-V supply - a core feature confirmed in the SCBS683H datasheet Section "Recommended Operating Conditions".
Does SN74LVTH374PW support hot insertion?
Yes, SN74LVTH374PW supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, preventing backflow current, and power-up 3-state holds outputs high-Z until VCC exceeds 1.5 V. Both are explicitly specified in the "Features" section and electrical characteristics table of the SN74LVTH374PW datasheet.
What is the function of the OE pin on SN74LVTH374PW?
The OE (output enable) pin on SN74LVTH374PW is an active-low control that places all eight Q outputs in high-impedance without affecting internal flip-flop states. Data can be latched or retained while OE is asserted, enabling bus sharing and conflict-free multi-driver architectures - as defined in the functional table and logic diagram of the SN74LVTH374PW datasheet.
Does SN74LVTH374PW require external pull-up or pull-down resistors on its D inputs?
No, SN74LVTH374PW does not require external pull-up or pull-down resistors on its D inputs because it includes active bus-hold circuitry. This feature maintains unused or undriven inputs at valid logic levels, as stated in the "Features" list and verified in the II(hold) parameter table (±750 µA max) of the SN74LVTH374PW datasheet.
What package type is SN74LVTH374PW supplied in?
SN74LVTH374PW is supplied in a 20-pin TSSOP (Thin Shrink Small Outline Package) with 0.65-mm lead pitch, 6.4-mm × 4.4-mm body, and 1.2-mm max height. This is confirmed in the "Ordering Information" table and "Package Outline" drawing (PW0020A) in the official SN74LVTH374PW datasheet.
SN74LVTH374PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 4.5ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Quiescent (Iq):
- 190 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVTH374PW FAQ
1.How can I place an order for SN74LVTH374PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH374PW 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 SN74LVTH374PW reliable?
The price and inventory of SN74LVTH374PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH374PW is usually 5 days.
3.What payment methods are accepted for SN74LVTH374PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH374PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTH374PW?
SN74LVTH374PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH374PW 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 SN74LVTH374PW?
For technical support, including SN74LVTH374PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH374PW requirements.
6.How does Aetrix verify that SN74LVTH374PW is sourced from the original manufacturer or authorized distributors?
All SN74LVTH374PW 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 SN74LVTH374PW meets industry standards.
7.What is the process for return or replacement of SN74LVTH374PW?
All SN74LVTH374PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH374PW, 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 SN74LVTH374PW part is unused and in its original packaging.
Return procedure for SN74LVTH374PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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