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STMicroelectronics 74LVQ574MTR
- Part No.:
- 74LVQ574MTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVQ574MTR.pdf
- Description:
- IC FF D-TYPE QUAD 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
74LVQ574MTR from STMicroelectronics is a low-voltage CMOS octal D-type flip-flop with non-inverting 3-state outputs, designed for 2.0–3.6 V operation. It features 180 MHz max clock frequency (typ.), 12 mA output drive (min), and symmetrical output impedance. Used in 3.3 V bus interface and data latching applications requiring low noise and high-speed edge-triggered storage.
For engineers reviewing the 74LVQ574MTR datasheet, 74LVQ574MTR pinout, 74LVQ574MTR application, or 74LVQ574MTR equivalent, key selection criteria include propagation delay matching (tPLH ≅ tPHL), 75 Ω transmission line driving capability, PCI bus level compliance at 24 mA, and latch-up immunity for industrial PCB layouts.
Technical Context
The device implements eight independent D-type latches triggered on the LOW-to-HIGH clock edge, with asynchronous 3-state control via active-low OE. Internal operation continues regardless of OE state-data can be latched while outputs remain high-impedance.
Designed using sub-micron C2MOS technology, it delivers balanced propagation delays (tPLH ≅ tPHL), low dynamic noise (VOLP = 0.5 V typ.), and ESD protection up to 2 kV. Input thresholds meet TTL compatibility, and output drive supports both 12 mA (standard) and 24 mA (PCI-level) sink/source under defined VCC conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Clock Frequency | 180 MHz (typ.) at VCC = 3.3 V - enables high-throughput data capture in fast synchronous buses |
| Supply Voltage Range | 2.0 V to 3.6 V - supports mixed-voltage 3.3 V systems with 1.2 V data retention |
| Output Drive Strength | 12 mA (min) |IOH| = |IOL| at VCC = 3.0 V - ensures robust signal integrity on terminated lines |
| Propagation Delay | 6.1 ns (typ.) tPLH/tPHL at VCC = 3.3 V - guarantees tight timing alignment across all 8 outputs |
| Quiescent Current | 4 µA (max) at TA = 25 °C - minimizes static power in battery-backed or always-on logic |
| Dynamic Output Noise | VOLP = 0.5 V (typ.) at VCC = 3.3 V - reduces ground bounce and crosstalk in dense routing |
| ESD Immunity | 2 kV HBM - protects against handling damage during assembly and field operation |
Pinout & Package
74LVQ574MTR is housed in a SO-20 (Small Outline Package, 20-pin) with gull-wing leads, 1.27 mm pitch, and tape-and-reel packaging (MTR suffix). Pin layout separates inputs (D0–D7, CK, OE) on one side and outputs (Q0–Q7) on the opposite side to simplify PCB trace routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state enable | Drives all Q outputs to high-impedance when HIGH; does not affect internal latch state |
| 2–9 (D0–D7) | Data inputs | Sampled on rising edge of CK; TTL-compatible input thresholds (VIH = 2.0 V min) |
| 11 (CK) | Clock input | LOW-to-HIGH edge-triggered; minimum pulse width 3.0 ns at VCC = 3.3 V |
| 12–19 (Q0–Q7) | Non-inverting 3-state outputs | Drive 75 Ω transmission lines; support PCI levels (24 mA sink/source) |
| 10 (GND) | Ground reference | 0 V return path for all I/O and supply currents; decoupling required near pin |
| 20 (VCC) | Positive supply | 2.0–3.6 V operating range; 1.2 V data retention voltage threshold |
Key Features
| Feature | Design Value |
|---|---|
| Symmetrical output drive | |IOH| = |IOL| = 12 mA (min) at VCC = 3.0 V - eliminates skew-induced timing jitter in bidirectional buses |
| Low-noise quiet output | VOLP = 0.5 V (typ.) at VCC = 3.3 V - suppresses simultaneous switching noise in multi-bit interfaces |
| Input/output separation | Inputs on left, outputs on right in SO-20 - enables straight-through PCB routing without layer jumps |
| Latch-up immunity | Enhanced C2MOS process - prevents destructive parasitic SCR activation under transient overvoltage |
| PCI bus level guarantee | 24 mA drive capability - meets PCI Local Bus Specification Rev. 2.2 electrical requirements |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Latching sensor status and actuator commands between microcontroller and peripheral drivers in noisy 24 V environments. IC Role / Device Role / Timing Role: Edge-triggered data register synchronizing asynchronous inputs to system clock domain. Use Value: 125 °C operating temperature rating and 2 kV ESD immunity ensure reliability in under-hood electronics. | Use Scenario: Buffering CAN controller TX/RX signals and managing multiplexed dashboard display data lines. IC Role / Device Role / Timing Role: Non-inverting 3-state register isolating MCU GPIOs from shared bus segments during arbitration. Use Value: Matched tPLH/tPHL delays (<1 ns skew) prevent bit misalignment in time-critical display updates. |
| Telecom Line Card Interface | Test Equipment Digital Pattern Generator |
Use Scenario: Driving multiple 75 Ω video or serial data lines from a single FPGA I/O bank with controlled impedance. IC Role / Device Role / Timing Role: High-speed bus transceiver supporting 180 MHz clocked data transfer with minimal jitter. Use Value: 75 Ω transmission line drive capability and VOLP < 0.8 V reduce signal reflections and eye closure. | Use Scenario: Generating synchronized multi-bit test vectors for ASIC validation with precise setup/hold timing. IC Role / Device Role / Timing Role: Precision edge-aligned data latch with tsu = 2.0 ns and th = 1.5 ns at 3.3 V. Use Value: Tight propagation delay matching (tOSLH < 1.0 ns) ensures deterministic vector launch across all 8 bits. |
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 |
|---|---|---|---|
| SN74LVC574APWR | Lower ICC (1 µA max), wider VCC range (1.65–3.6 V), but lower max fMAX (150 MHz) | Preferred for ultra-low-power portable designs; lacks PCI-level 24 mA drive | Select when quiescent current dominates over speed or bus-drive strength |
| 74ALVC574MTCX | Higher speed (200 MHz typ.), same 3.3 V operation, but only 1.5 kV ESD rating | Better for high-frequency test equipment; less suitable for harsh automotive/industrial environments | Select when maximum clock rate is critical and ESD margin can be managed externally |
Compared with SN74LVC574APWR and 74ALVC574MTCX, the 74LVQ574MTR uniquely balances 180 MHz speed, 24 mA PCI-compliant drive, and 2 kV ESD immunity-making it optimal for industrial bus interfaces where robustness and timing fidelity are co-prioritized.
Availability
74LVQ574MTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, telecom line card interface, and test equipment digital pattern generation requiring stable component supply and long-term lifecycle support.
Supply support for 74LVQ574MTR 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 microcontrollers, power management, analog ICs, and discrete devices for industrial, automotive, and consumer markets.
The 74LVQ series targets low-voltage, high-speed logic applications in 3.3 V systems-designed specifically for noise-sensitive, space-constrained PCBs needing reliable edge-triggered storage with robust bus-driving capability.
FAQ
What is the minimum recommended VCC for functional operation of the 74LVQ574MTR?
The 74LVQ574MTR operates functionally from 2.0 V to 3.6 V per Recommended Operating Conditions. Below 2.0 V, timing parameters and output drive degrade; data retention is guaranteed down to 1.2 V, but no logic transitions occur. For full specification compliance-including 180 MHz clocking and 12 mA drive-the device must be operated at ≥2.7 V.
Can the 74LVQ574MTR drive a 50 Ω transmission line?
Yes, but with reduced noise margin. The device is characterized for 75 Ω lines (VOLP = 0.5 V typ.), and its 12 mA output drive supports 50 Ω loads at VCC = 3.3 V (VOL ≈ 0.44 V at 12 mA). For strict 50 Ω impedance matching and lowest jitter, external series termination or a dedicated 50 Ω driver is recommended.
Is the 74LVQ574MTR pin-compatible with standard 74HC574 devices?
No. While functionally similar, the 74LVQ574MTR uses a different pinout optimized for PCB layout: inputs (D0–D7, CK, OE) occupy pins 2–5 and 6–9 plus 11 and 1, while outputs (Q0–Q7) are on pins 12–19. Standard 74HC574 places D and Q on alternating pins. Physical replacement requires board redesign.
Does the OE pin affect internal latch behavior during high-impedance mode?
No. The OE pin controls only the output buffer stage. Internal flip-flops continue sampling D inputs on every CK rising edge and retain state regardless of OE logic level. This allows seamless data preloading or updating while outputs remain isolated-critical for hot-swap and bus-arbitrated systems.
74LVQ574MTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LVQ
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74LVQ574MTR FAQ
1.How can I place an order for 74LVQ574MTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVQ574MTR 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 74LVQ574MTR reliable?
The price and inventory of 74LVQ574MTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVQ574MTR is usually 5 days.
3.What payment methods are accepted for 74LVQ574MTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVQ574MTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVQ574MTR?
74LVQ574MTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVQ574MTR 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 74LVQ574MTR?
For technical support, including 74LVQ574MTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVQ574MTR requirements.
6.How does Aetrix verify that 74LVQ574MTR is sourced from the original manufacturer or authorized distributors?
All 74LVQ574MTR 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 74LVQ574MTR meets industry standards.
7.What is the process for return or replacement of 74LVQ574MTR?
All 74LVQ574MTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVQ574MTR, 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 74LVQ574MTR part is unused and in its original packaging.
Return procedure for 74LVQ574MTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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