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STMicroelectronics 74LVC374AMTR
- Part No.:
- 74LVC374AMTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVC374AMTR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,232
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Product details
Overview
74LVC374AMTR from STMicroelectronics is an octal D-type flip-flop with 3-state non-inverting outputs, designed for bus interface and data latching in mixed-voltage systems. It operates from 1.65V to 3.6V, delivers 6.8ns max propagation delay at 3V, supports 5V-tolerant inputs, and provides ±24mA output drive-enabling reliable 3.3V/5V level translation in PCI-compliant digital interfaces.
For engineers reviewing the 74LVC374AMTR datasheet, 74LVC374AMTR pinout, 74LVC374AMTR application, or 74LVC374AMTR equivalent, key selection criteria include 3-state control timing (tPZL/tPLZ), latch-up immunity (>500mA), ESD robustness (HBM >2kV), and precise VIH/VIL thresholds across 1.65–3.6V supply range.
Technical Context
This device implements edge-triggered storage with positive-clock transition sampling and independent 3-state output control via active-low OE. Its dual-rail input tolerance (0–5.5V) and power-down protection allow safe operation during supply sequencing or hot insertion.
Propagation delays are balanced (tPLH ≅ tPHL), skew is limited to 1ns across outputs, and dynamic noise margins (VOLP = ±0.8V) are specified under 50pF load-critical for high-speed bus integrity in industrial control and telecom backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65V to 3.6V - enables direct interfacing between 1.8V, 2.5V, and 3.3V logic domains |
| Max Propagation Delay | 6.8ns at VCC = 3.0V - supports >100MHz clock rates in synchronous data capture |
| Output Drive Strength | ±24mA at VCC = 3.0V - meets PCI bus loading requirements and drives 50Ω transmission lines |
| Input Voltage Tolerance | 0V to 5.5V - allows 5V signals to be safely applied while VCC = 1.65V–3.6V |
| 3-State Enable/Disable Time | tPZL = 7.7ns, tPLZ = 7.0ns at VCC = 3.0V - ensures clean bus turnaround in multiplexed address/data paths |
| ESD Immunity | HBM >2000V - protects against handling damage in automated assembly and field service |
| Latch-Up Immunity | >500mA per JESD17 - prevents destructive current runaway during overvoltage transients |
Pinout & Package
SOP-20 package (SO-20, 12.6mm × 7.5mm body, 1.27mm pitch), tape-and-reel format (MTR suffix), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Active-Low Output Enable) | Asserting low enables Q0–Q7 outputs; high places all outputs in high-impedance state without affecting internal latch state |
| 2,5,6,9,12,15,16,19 | Q0–Q7 (3-State Outputs) | Non-inverting registered outputs; each independently driven or tri-stated based on OE and clock edge |
| 3,4,7,8,13,14,17,18 | D0–D7 (Data Inputs) | Asynchronous data inputs sampled on rising CK edge; tolerate 0–5.5V regardless of VCC |
| 11 | CK (Clock Input) | Rising-edge triggered; controls synchronous capture of D0–D7 into internal latches |
| 10 | GND | Reference ground for all I/O and internal logic; must be connected before VCC during power-up |
| 20 | VCC | Primary supply rail (1.65–3.6V); powers internal logic and output drivers; decoupling required within 5mm |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Accepts 0–5.5V input signals with VCC as low as 1.65V - eliminates external level shifters in mixed-voltage systems |
| Power-down protection | Inputs and outputs remain safe at 0–7V even when VCC = 0V - enables hot-plug and partial-power-down operation |
| Balanced propagation delays | tPLH ≅ tPHL - minimizes duty-cycle distortion in clocked data paths and reduces timing skew across parallel buses |
| Symmetrical output impedance | |IOH| = |IOL| ≥24mA at VCC = 3.0V - ensures matched rise/fall times and consistent signal integrity on shared bus lines |
| PCI bus compliance | Guaranteed 24mA drive at 3.3V - satisfies PCI Local Bus Specification Rev. 2.2 electrical loading requirements |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Data Latching |
|---|---|
|
Use Scenario: Isolating microcontroller GPIO from noisy 24V I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Octal latch buffers address/data bus lines between 3.3V MCU and 5V peripheral modules using OE-controlled 3-state isolation. Use Value: 5V-tolerant D inputs accept direct connection to 5V sensor outputs; ±24mA drive sustains signal integrity across 30cm backplane traces. |
Use Scenario: Capturing door lock status, window position, and lighting commands in centralized automotive body controllers. IC Role / Device Role / Timing Role: Synchronizing asynchronous switch inputs to MCU clock domain while enabling shared CAN/LIN bus line driving via 3-state outputs. Use Value: Balanced tPLH/tPHL (≤6.8ns) ensures deterministic sampling of mechanical switch bounce; HBM >2kV withstands vehicle ESD events. |
| Telecom Line Card Address Register | Test Equipment Digital Pattern Generator |
|
Use Scenario: Holding configuration addresses for FPGA-based framer ICs in modular telecom line cards operating at 3.3V. IC Role / Device Role / Timing Role: Edge-triggered D-flip-flop storing 8-bit slot or port identifiers; OE enables dynamic bus sharing with other control registers. Use Value: 1.65V minimum VCC allows operation during brown-out conditions; 1ns output skew maintains address setup time across multi-device stacks. |
Use Scenario: Generating synchronized 8-bit stimulus patterns for IC functional testing at up to 100MHz. IC Role / Device Role / Timing Role: High-speed data register staging test vectors from pattern memory; 3-state outputs isolate unused channels during vector switching. Use Value: 6.8ns max tPD enables 100MHz pattern update rate; symmetrical drive strength ensures <100ps edge jitter on 50Ω terminated outputs. |
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 |
|---|---|---|---|
| SN74LVC374APWR (TI) | TSSOP-20 only; identical AC/DC specs but tighter VOL max (0.55V vs 0.6V at 24mA) | Same 3.3V/5V interface role; requires PCB redesign for TSSOP footprint | Preferred for new designs requiring higher board density and TI supply chain alignment |
| 74ALVC374MTC (ON Semi) | Lower ICC (5µA vs 10µA), faster tPD (5.2ns typ), but no 5V-tolerant inputs (VI max = VCC + 0.5V) | Not suitable for 5V signal interfacing; requires external clamping diodes if used with legacy 5V peripherals | Select only in pure 3.3V systems where ultra-low static power and speed outweigh interface flexibility |
Compared with SN74LVC374APWR and 74ALVC374MTC, the 74LVC374AMTR uniquely combines SOP-20 manufacturability, full 5V input tolerance, and guaranteed PCI-level drive-making it optimal for industrial retrofit and mixed-voltage upgrade programs.
Availability
74LVC374AMTR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, telecom line card registers, and test equipment pattern generators requiring stable component supply across extended temperature ranges (–55°C to +125°C).
Supply support for 74LVC374AMTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with strong analog/mixed-signal and embedded processing capabilities.
The 74LVC series targets high-speed, low-voltage logic interfacing in industrial automation and communications infrastructure, emphasizing robustness, voltage flexibility, and long-term supply stability.
FAQ
Can 74LVC374AMTR operate with VCC = 1.8V while accepting 5V inputs?
Yes. The device guarantees 5V-tolerant inputs (0–5.5V) across its full operating range (1.65V–3.6V). At VCC = 1.8V, VIH is 1.17V and VIL is 0.63V per datasheet Table 6, ensuring reliable logic recognition of 5V TTL signals without level shifters or clamping circuits.
What is the maximum clock frequency supported by 74LVC374AMTR?
The maximum usable clock frequency is determined by propagation delay (tPD ≤6.8ns) and setup/hold times (ts = 2ns, th = 1.5ns). For reliable operation, minimum clock period must exceed tPD + ts + th = 10.3ns, supporting up to ~97MHz in worst-case conditions at VCC = 3.0V and TA = 125°C.
Does OE assertion affect internal latch state retention?
No. The OE input controls only the output buffer stage; internal flip-flop states remain fully retained and continue updating on subsequent clock edges regardless of OE state. This allows seamless bus arbitration where data can be captured and held while outputs are tri-stated for shared-line access.
Is 74LVC374AMTR pin-compatible with older 74HC374 devices?
Yes - it is functionally and pin-compatible with 74HC374 and 74LS374, sharing identical SOP-20 pinout and truth table. However, it replaces HC/LS logic with LVC's lower voltage operation (1.65–3.6V), higher speed, and 5V-tolerant inputs - enabling drop-in upgrades in existing 5V systems with reduced power and improved noise margin.
74LVC374AMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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:
- -
- Max Propagation Delay @ V, Max CL:
- 8.2ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74LVC374AMTR FAQ
1.How can I place an order for 74LVC374AMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC374AMTR 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 74LVC374AMTR reliable?
The price and inventory of 74LVC374AMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC374AMTR is usually 5 days.
3.What payment methods are accepted for 74LVC374AMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC374AMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC374AMTR?
74LVC374AMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC374AMTR 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 74LVC374AMTR?
For technical support, including 74LVC374AMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC374AMTR requirements.
6.How does Aetrix verify that 74LVC374AMTR is sourced from the original manufacturer or authorized distributors?
All 74LVC374AMTR 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 74LVC374AMTR meets industry standards.
7.What is the process for return or replacement of 74LVC374AMTR?
All 74LVC374AMTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC374AMTR, 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 74LVC374AMTR part is unused and in its original packaging.
Return procedure for 74LVC374AMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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