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STMicroelectronics 74LVX574TTR
- Part No.:
- 74LVX574TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVX574TTR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,618
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Product details
Overview
74LVX574TTR from STMicroelectronics is a low-voltage CMOS octal D-type flip-flop with 3-state non-inverting outputs, 5V-tolerant inputs, and operation from 2V to 3.6V supply. It features 125MHz max clock frequency (typ.), 4µA max quiescent current at 25°C, and symmetrical 4mA output drive capability. Used in 3.3V bus interface and data latching applications where level translation between 5V and 3.3V domains is required.
For engineers reviewing the 74LVX574TTR datasheet, 74LVX574TTR pinout, 74LVX574TTR application, or 74LVX574TTR equivalent, key selection criteria include 5V input tolerance, 3-state output control timing (tPZL/tPHZ ≤18.5ns), propagation delay matching (tPLH ≅ tPHL), and latch-up immunity for mixed-voltage system interconnects.
Technical Context
This device implements eight edge-triggered D-type latches synchronized on the LOW-to-HIGH clock transition, with independent 3-state output enable (active-low OE). Internal flip-flop operation continues regardless of OE state-data can be captured or retained while outputs are high-impedance.
Input protection enables safe operation with 0–7V input voltages independent of VCC, supporting robust 5V-to-3.3V interfacing. Output drive strength (|IOH| = |IOL| = 4mA min at VCC = 3V) and low dynamic noise (VOLP = 0.3V typ.) ensure signal integrity in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 3.6V - supports battery-powered and low-noise 3.3V systems; retains data down to 1.2V |
| Max Clock Frequency | 125MHz (typ. at VCC = 3.3V) - enables high-speed data capture in synchronous bus interfaces |
| Input Voltage Tolerance | 0V to 5.5V - allows direct connection to 5V logic without external level shifters |
| Quiescent Supply Current | 4µA (max at TA = 25°C) - minimizes standby power in portable and energy-sensitive designs |
| Output Drive Strength | ±4mA (min at VCC = 3V) - ensures reliable fanout to multiple CMOS loads under worst-case VCC |
| Propagation Delay Match | tPLH ≅ tPHL - reduces skew-induced timing uncertainty across all eight outputs |
| Dynamic Output Noise | VOLP = 0.3V (typ. at VCC = 3.3V, CL = 50pF) - limits ground bounce and crosstalk in high-density routing |
Pinout & Package
TSSOP-20 package (JEDEC MO-153, 6.5mm × 4.4mm body, 0.65mm pitch); thermally enhanced for surface-mount assembly in space-constrained industrial and telecom modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Asserting high disables all Q0–Q7 outputs to high-impedance; does not affect internal latch state |
| 2–9 (D0–D7) | Data inputs | Synchronously sampled on rising CK edge; tolerate 0–5.5V regardless of VCC |
| 11 (CK) | Clock input | LOW-to-HIGH edge-triggered; minimum pulse width 5.0ns (VCC = 3.3V) |
| 12–19 (Q0–Q7) | 3-state non-inverting outputs | Driven high/low when OE = low; high-Z when OE = high; ±4mA drive capability |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents; decoupling required within 5mm |
| 20 (VCC) | Positive supply | 2.0–3.6V operation; bypass capacitor (100nF) recommended adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Accepts 0–5.5V signals with no external components-enables seamless 5V microcontroller to 3.3V FPGA interfacing |
| Power-down input protection | Withstands 0–7V input voltage regardless of VCC state-prevents damage during hot-insertion or supply sequencing |
| Balanced propagation delays | tPLH and tPHL closely matched-reduces inter-output skew to ≤1.5ns (max), critical for parallel bus timing closure |
| Low dynamic noise | VOLP = 0.3V (typ.) minimizes simultaneous switching output (SSO) noise in multi-bit data paths |
| ESD immunity | 2kV HBM on all pins-meets industrial IEC 61000-4-2 level 3 requirements without added protection circuitry |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Latching sensor status from 5V analog front-end ICs into a 3.3V microcontroller data bus. IC Role / Device Role / Timing Role: Synchronous data register providing level-shifted, noise-immune capture of 8-bit status flags on rising clock edge. Use Value: Eliminates discrete level translators and reduces BOM count while maintaining <15ns propagation delay and 2.5V VOH at 4mA load. |
Use Scenario: Isolating and buffering switch inputs from 5V cabin switches before feeding to 3.3V CAN controller GPIO. IC Role / Device Role / Timing Role: Input latch with 3-state outputs enabling shared bus access among multiple subsystems via OE control. Use Value: Enables hot-swap-safe input sampling with 0–7V input tolerance and latch-up immunity per AEC-Q100 Class 2 stress requirements. |
| Telecom Line Card Data Buffering | Medical Imaging Sensor Interface |
|
Use Scenario: Capturing parallel pixel data from 5V CCD drivers into a 3.3V image processing ASIC. IC Role / Device Role / Timing Role: High-speed octal register synchronizing burst-mode video data with sub-10ns setup/hold margins. Use Value: Delivers 125MHz operation with matched tPLH/tPHL to maintain pixel timing alignment across all 8 bits. |
Use Scenario: Temporarily storing calibration coefficients from 5V EEPROM into a 3.3V ADC configuration register. IC Role / Device Role / Timing Role: Low-power data latch retaining values during processor sleep cycles (ICC = 4µA max). Use Value: Extends battery life in portable ultrasound probes by minimizing static current while preserving data integrity at 1.2V VCC retention. |
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 |
|---|---|---|---|
| SN74LVC574APWR | Lower ICC (1µA typ.), but only 3.6V max VCC and no 5V input tolerance beyond 3.6V | Requires external clamping for 5V inputs; unsuitable for direct 5V-to-3.3V interface without redesign | Select when system uses only 3.3V peripherals and ultra-low standby current is prioritized over interface flexibility |
| 74ALVC574MTCX | Faster tPLH (5.5ns typ. at 3.3V), but higher ICC (10µA max) and no guaranteed 7V input survival rating | Lacks power-down protection-vulnerable to damage during supply sequencing or hot-plug events | Select for speed-critical test equipment where input voltage transients are controlled and ESD robustness is secondary |
Compared with SN74LVC574APWR and 74ALVC574MTCX, the 74LVX574TTR uniquely combines 5V-tolerant inputs with 0–7V input survivability, 4µA max ICC, and balanced propagation delays-making it the only choice for unbuffered 5V/3.3V domain bridging in industrial and automotive environments requiring long-term reliability.
Availability
74LVX574TTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and telecom line card data buffering requiring stable component supply across extended temperature ranges (−55°C to +125°C).
Supply support for 74LVX574TTR 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, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.
The LVX logic family targets low-voltage, high-noise-immunity applications requiring 5V compatibility and ultra-low static power-optimized for battery-operated and mixed-supply systems.
FAQ
Can 74LVX574TTR operate with VCC = 2.0V while accepting 5V inputs?
Yes. The device guarantees full functionality at VCC = 2.0V to 3.6V, and its inputs tolerate 0–5.5V regardless of VCC level. Absolute maximum input voltage is 7.0V, with built-in diode clamping and power-down protection ensuring safe operation during brown-out or supply sequencing.
What is the minimum clock pulse width required for reliable operation at 3.3V?
At VCC = 3.3V, the minimum HIGH and LOW clock pulse widths are both 5.0ns (guaranteed over −55°C to +125°C). This enables use in high-frequency synchronous systems where tight clock budgeting is essential, such as real-time data acquisition interfaces.
How does the 3-state output disable timing behave when OE transitions while CK is active?
Output disable time (tPHZ/tPLZ) is specified up to 17.0ns max at VCC = 3.3V, independent of clock activity. OE assertion immediately places outputs in high-impedance, but internal latches continue sampling D inputs on subsequent CK edges-enabling glitch-free bus sharing.
Is the 74LVX574TTR pin-compatible with standard 74HC574 devices?
No. While functionally similar, the 74LVX574TTR uses TSSOP-20 packaging and has different DC characteristics (e.g., VIH/VIL thresholds, 5V-tolerant inputs). Pinout matches 74-series 574 logic (e.g., OE, CK, D0–D7, Q0–Q7, GND, VCC), but electrical behavior and thermal profile differ significantly.
74LVX574TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LVX
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 75 MHz
- Max Propagation Delay @ V, Max CL:
- 16.7ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVX574TTR FAQ
1.How can I place an order for 74LVX574TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX574TTR 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 74LVX574TTR reliable?
The price and inventory of 74LVX574TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX574TTR is usually 5 days.
3.What payment methods are accepted for 74LVX574TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX574TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX574TTR?
74LVX574TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX574TTR 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 74LVX574TTR?
For technical support, including 74LVX574TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX574TTR requirements.
6.How does Aetrix verify that 74LVX574TTR is sourced from the original manufacturer or authorized distributors?
All 74LVX574TTR 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 74LVX574TTR meets industry standards.
7.What is the process for return or replacement of 74LVX574TTR?
All 74LVX574TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX574TTR, 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 74LVX574TTR part is unused and in its original packaging.
Return procedure for 74LVX574TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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