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STMicroelectronics 74ACT574MTR
- Part No.:
- 74ACT574MTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT574MTR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,717
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Product details
Overview
74ACT574MTR from STMicroelectronics is an advanced high-speed CMOS octal D-type flip-flop with 3-state non-inverting outputs, designed for synchronous data latching in bus-oriented digital systems. It features 270 MHz typical maximum clock frequency at 5.0 V, ±24 mA symmetrical output drive, and pin/function compatibility with standard 74-series 574 devices. Used in address/data bus buffering and register file interfaces in industrial control and instrumentation.
For engineers reviewing the 74ACT574MTR datasheet, 74ACT574MTR pinout, 74ACT574MTR application, or 74ACT574MTR equivalent, key selection criteria include 3-state output timing (tPZL/tPLZ ≤ 10 ns), TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), 50 Ω transmission line driving capability, and operation across –55°C to +125°C.
Technical Context
This device implements eight edge-triggered D-type latches synchronized to the low-to-high clock transition, with independent 3-state output control via active-low OE. Internal latch operation remains fully functional regardless of OE state-data can be captured or retained while outputs are tri-stated.
Designed using sub-micron C2MOS technology, it delivers balanced propagation delays (tPLH ≅ tPHL), symmetrical output impedance, and 2 kV ESD protection on all I/O pins. Its 4.5–5.5 V operating range and 4 µA max ICC at 25°C support low-power, high-noise-immunity digital interfacing between HC/TTL and NMOS systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Clock Frequency | 270 MHz (typ.) at VCC = 5.0 V - enables high-throughput data capture in fast parallel buses |
| Output Drive | ±24 mA (min.) - drives 50 Ω transmission lines directly without external buffers |
| Propagation Delay | 10 ns (tPLH/tPHL, CL = 50 pF) - ensures tight timing alignment in synchronous logic |
| Supply Range | 4.5 V to 5.5 V - compatible with regulated 5 V rails and tolerant of supply ripple |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees interoperability with TTL-level sources |
| Quiescent Current | 4 µA (max. at TA = 25°C) - supports ultra-low static power in always-on subsystems |
| Operating Temp | –55°C to +125°C - qualified for extended industrial and automotive under-hood use |
Pinout & Package
74ACT574MTR is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-013AA, with 0.30 mm lead thickness, 1.27 mm pitch, and 13.00 mm × 7.60 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Tri-states all Q outputs simultaneously; does not affect internal latch state |
| 2–9 (D0–D7) | Data inputs | Sampled on rising edge of CK; hold setup/hold times (ts = 1 ns min., th = –1 ns min.) |
| 11 (CK) | Clock input | Low-to-high edge-triggered; minimum pulse width 3.0 ns at 5.0 V |
| 12–19 (Q0–Q7) | 3-state non-inverting outputs | Reflect D-input state when OE = L; high-impedance when OE = H |
| 10 (GND) | Ground reference | 0 V return path for all logic and output currents |
| 20 (VCC) | Positive supply | Primary power rail; decoupling required within 1 cm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Edge-triggered latching | Rising-edge CK captures D inputs with –1 ns minimum hold time - simplifies timing closure in high-speed designs |
| Independent output control | OE pin disables outputs without disrupting internal latch state - enables dynamic bus sharing |
| Transmission-line drive | Guaranteed 50 Ω line driving with symmetrical IOH/IOL - eliminates need for series termination resistors |
| ESD robustness | 2 kV HBM rating on all pins - reduces susceptibility to handling damage and system-level transients |
| Wide temperature operation | Specified from –55°C to +125°C - supports deployment in uncontrolled industrial environments |
Applications
| Industrial PLC Backplane Interface | Test Equipment Data Acquisition Bus |
|---|---|
Use Scenario: Isolating and latching parallel sensor data streams onto a shared backplane bus in programmable logic controllers. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as a synchronized input register, capturing analog-to-digital converter outputs on clock edge. Use Value: 270 MHz clock tolerance and 10 ns propagation delay ensure deterministic sampling across multi-slot chassis timing budgets. | Use Scenario: Buffering measurement results from multiple ADC channels into a common FIFO or microcontroller interface. IC Role / Device Role / Timing Role: 3-state output register enabling time-multiplexed access to shared data bus by multiple instruments. Use Value: Independent OE control allows seamless bus arbitration without disturbing internal latch contents during read cycles. |
| Automotive Engine Control Module (ECM) | Communications Baseband Signal Conditioning |
Use Scenario: Capturing real-time sensor feedback (e.g., crankshaft position, knock detection) in engine management units. IC Role / Device Role / Timing Role: High-reliability data latch synchronizing noisy analog front-end signals to deterministic MCU clock domains. Use Value: –55°C to +125°C qualification and 2 kV ESD immunity meet AEC-Q100 stress requirements for under-hood placement. | Use Scenario: Aligning parallel I/Q sample paths before digital downconversion in RF baseband processors. IC Role / Device Role / Timing Role: Synchronous register providing matched delay and skew-controlled staging of dual-channel data. Use Value: Balanced tPLH/tPHL (≤1 ns mismatch) minimizes inter-channel timing skew critical for IQ imbalance correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state outputs applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT574N | DIP-20 package; identical AC/DC specs but larger footprint and higher thermal resistance | Suitable for prototyping or legacy through-hole PCBs; not for space-constrained SMT designs | Select when manual assembly, socketing, or thermal derating margin is prioritized over board area |
| 74LCX574MTR | Lower VCC range (2.0–3.6 V); 3.3 V logic compatible; reduced drive (±24 mA @ 3.3 V only) | Targeted for mixed-voltage 3.3 V systems; incompatible with 5 V bus interfaces | Choose only when migrating to 3.3 V core logic and full 5 V tolerance is unnecessary |
Compared with SN74ACT574N and 74LCX574MTR, the 74ACT574MTR uniquely combines SOIC packaging, full 5 V operation, 270 MHz speed, and industrial temperature range-making it optimal for new 5 V SMT designs requiring bus isolation and timing integrity.
Availability
74ACT574MTR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, test equipment data acquisition buses, automotive engine control modules, and communications baseband signal conditioning requiring stable component supply and long-term lifecycle assurance.
Supply support for 74ACT574MTR 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, delivering silicon solutions for smart driving, power management, sensing, connectivity, and microcontrollers.
The 74ACT574 belongs to ST's Advanced CMOS Logic (ACT) family, engineered for high-speed, low-power 5 V digital interfacing between TTL, NMOS, and CMOS systems in industrial and automotive environments.
FAQ
What is the minimum recommended bypass capacitance for 74ACT574MTR?
A minimum 100 nF ceramic capacitor placed within 5 mm of VCC and GND pins is required to suppress switching noise and maintain stable 5 V rail integrity. For systems with >10 MHz clock activity, add a 10 nF capacitor in parallel to improve high-frequency decoupling. Layout must minimize loop inductance using short, wide traces and ground plane coupling.
Can OE be toggled asynchronously while CK is active?
Yes-OE may be asserted or deasserted at any time without affecting internal latch operation. The Q outputs respond to OE within 10 ns (tPZL/tPLZ), while stored D-input states remain unchanged. This allows dynamic bus contention avoidance during ongoing clocked data capture, provided OE transitions avoid metastability windows near CK edges.
Is 74ACT574MTR compliant with RoHS and REACH?
Yes-74ACT574MTR is manufactured in STMicroelectronics' RoHS-compliant and REACH-conformant facilities. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). Full compliance documentation is available upon request with batch-specific certificates of conformance.
Does the device support hot insertion?
No-74ACT574MTR is not hot-insertion rated. Its inputs lack power-up/down protection circuitry, and applying VCC after signal voltages may cause latch-up or excessive current flow. Always ensure VCC is stable and within specification before applying input signals, and sequence power according to ST's AN2017 guidelines for ACT-family devices.
74ACT574MTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74ACT
- 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:
- 270 MHz
- Max Propagation Delay @ V, Max CL:
- 10ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- 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-SO
74ACT574MTR FAQ
1.How can I place an order for 74ACT574MTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT574MTR 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 74ACT574MTR reliable?
The price and inventory of 74ACT574MTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT574MTR is usually 5 days.
3.What payment methods are accepted for 74ACT574MTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT574MTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT574MTR?
74ACT574MTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT574MTR 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 74ACT574MTR?
For technical support, including 74ACT574MTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT574MTR requirements.
6.How does Aetrix verify that 74ACT574MTR is sourced from the original manufacturer or authorized distributors?
All 74ACT574MTR 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 74ACT574MTR meets industry standards.
7.What is the process for return or replacement of 74ACT574MTR?
All 74ACT574MTR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT574MTR, 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 74ACT574MTR part is unused and in its original packaging.
Return procedure for 74ACT574MTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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