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STMicroelectronics 74VHC574MTR
- Part No.:
- 74VHC574MTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74VHC574MTR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,774
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Product details
Overview
74VHC574MTR from STMicroelectronics is an advanced high-speed CMOS octal D-type flip-flop with 3-state non-inverting outputs, clocked on the LOW-to-HIGH edge and controlled by an active-low output enable (OE). It operates from 2V to 5.5V, delivers tPLH/tPHL ≤ 10.0 ns at 5V/50 pF, supports 180 MHz max clock frequency, and provides 8 mA output drive strength. It is used in bus interface, data latching, and register applications in industrial control and embedded systems.
For engineers reviewing the 74VHC574MTR datasheet, 74VHC574MTR pinout, 74VHC574MTR application, or 74VHC574MTR equivalent, key selection criteria include 3-state output timing control, VCC range compatibility across 3.3V/5V domains, input overvoltage tolerance up to 7V, ESD immunity (2 kV), and guaranteed propagation skew ≤1.0 ns.
Technical Context
This device implements eight independent D-type latches synchronized to a single positive-edge-triggered clock (CK) and globally enabled/disabled via OE. Its internal logic retains stored data regardless of OE state-allowing new data capture while outputs are tri-stated.
Designed for mixed-voltage interfacing, it accepts inputs from 0V to 7V independent of VCC, features symmetrical output drive (|IOH| = |IOL| ≥ 8 mA), and guarantees balanced propagation delays (tPLH ≅ tPHL) and low dynamic noise (VOLP ≤ 0.9 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - supports direct 3.3V/5V system integration without level shifters |
| Max Clock Frequency | 180 MHz (typ.) at VCC = 5V - enables high-throughput data capture in fast digital buses |
| Propagation Delay | tPLH/tPHL ≤ 10.0 ns at VCC = 5V, CL = 50 pF - ensures tight timing alignment in synchronous designs |
| Output Drive Strength | |IOH| = |IOL| ≥ 8 mA - drives standard TTL loads and multiple CMOS inputs reliably |
| Input Voltage Tolerance | −0.5 V to +7.0 V - allows safe interfacing with higher-voltage peripherals or floating inputs |
| ESD Immunity | 2 kV HBM - protects against handling-induced static discharge during assembly and test |
| Quiescent Current | ICC ≤ 4 µA at TA = 25°C - minimizes standby power in battery-backed or low-power systems |
Pinout & Package
74VHC574MTR is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package with 0.300-inch body width and standard 1.27 mm pitch. Pin 1 is marked with a beveled corner or dot; pin numbering follows counter-clockwise sequence from top-left when viewed from top with marking side up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Drives all Q0–Q7 into high-impedance when HIGH; no effect on internal latch state |
| 2–9 (D0–D7) | Data inputs | Synchronously loaded into respective flip-flops on CK rising edge |
| 11 (CK) | Clock input | LOW-to-HIGH edge-triggered; determines sampling instant for D-to-Q transfer |
| 12–19 (Q0–Q7) | 3-state non-inverting outputs | Reflect D-input states when OE = LOW; float when OE = HIGH |
| 10 (GND) | Ground reference | Return path for all internal logic and I/O; must be low-impedance |
| 20 (VCC) | Positive supply | Primary power rail; decoupling capacitor required within 1 cm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Power-down input protection | Accepts −0.5 V to +7.0 V on all inputs regardless of VCC - prevents latch-up during hot insertion or voltage sequencing |
| High noise immunity | VNIH/VNIL ≥ 28% VCC - rejects transient coupling in noisy industrial environments |
| Low dynamic noise | VOLP ≤ 0.9 V at VCC = 5V, CL = 50 pF - reduces ground bounce and signal integrity risk in dense PCB layouts |
| Improved latch-up immunity | Guaranteed resistance to parasitic SCR activation - enhances reliability under overvoltage or ESD stress |
| Pin-compatible upgrade | Direct replacement for 74LS574 and 74HC574 - simplifies legacy design refresh without layout change |
Applications
| Industrial Bus Interface | Embedded Data Register |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from noisy PLC backplanes using shared 8-bit data bus. IC Role / Device Role / Timing Role: Acts as bidirectional data latch and bus driver, synchronizing transfers to system clock edges. Use Value: Enables clean signal handoff between 3.3V MCU and 5V field I/O modules with no external level translation. | Use Scenario: Capturing parallel sensor readings (e.g., ADC output bus) in real-time monitoring systems. IC Role / Device Role / Timing Role: Provides edge-triggered storage of 8-bit parallel data with deterministic setup/hold timing. Use Value: Guarantees accurate sampling at up to 180 MHz, eliminating metastability in high-speed acquisition paths. |
| Memory Address Latch | Digital Test Equipment I/O |
Use Scenario: Holding lower address bits during multiplexed address/data cycles in 8-bit microprocessor systems. IC Role / Device Role / Timing Role: Functions as transparent latch during ALE assertion, then holds stable address during memory access. Use Value: Reduces address skew across multiple devices and supports reliable decoding with <10 ns propagation matching. | Use Scenario: Providing programmable stimulus/response channels in automated test fixtures for IC validation. IC Role / Device Role / Timing Role: Serves as configurable I/O port with tri-state control for shared test bus arbitration. Use Value: Allows dynamic reconfiguration of pin direction (input/output) without hardware changes via OE control. |
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 |
|---|---|---|---|
| SN74VHC574N | Same VCC range and pinout; slightly higher ICC (6 µA max) and longer tPLH (11.5 ns typ. at 5V) | Identical functional behavior but marginally reduced speed and higher quiescent current | Preferred where TI's qualification or long-term availability is prioritized over minimal timing margin |
| 74HC574D,653 | Slower fMAX (90 MHz typ.), higher VOL (0.55 V at 8 mA), no input overvoltage tolerance beyond VCC | Lacks 7V input rating and ESD robustness - unsuitable for hot-swap or mixed-voltage interfaces | Select only for cost-sensitive, single-rail 5V-only designs where speed and ruggedness are secondary |
Compared with SN74VHC574N and 74HC574D,653, the 74VHC574MTR offers superior speed, lower static power, and critical input overvoltage tolerance-making it optimal for interoperable, multi-supply industrial systems requiring long-term reliability.
Availability
74VHC574MTR is available at Aetrix Electronics and suitable for industrial bus interface, embedded data register, memory address latch, and digital test equipment I/O requiring stable component supply across extended temperature ranges (−55°C to +125°C).
Supply support for 74VHC574MTR 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 solutions with vertical manufacturing capabilities.
The 74VHC series targets high-speed, low-power logic applications in industrial automation and embedded control, emphasizing robustness, wide supply range, and compatibility with legacy TTL and CMOS systems.
FAQ
What is the maximum operating temperature for 74VHC574MTR?
The 74VHC574MTR is rated for operation from −55°C to +125°C, meeting extended industrial temperature requirements. This rating is validated per STMicroelectronics' Recommended Operating Conditions (Table 5) and confirmed in Absolute Maximum Ratings (Table 4), ensuring reliability in harsh thermal environments such as motor control enclosures or outdoor infrastructure.
Can 74VHC574MTR safely interface a 3.3V microcontroller with a 5V peripheral bus?
Yes - its 2V–5.5V supply range, 3.3V-compatible logic thresholds (VIH = 0.7×VCC, VIL = 0.3×VCC), and input overvoltage tolerance (−0.5V to +7.0V) allow direct connection without level shifters. Outputs swing rail-to-rail, enabling clean 5V signaling to peripherals while accepting 3.3V logic levels from the MCU.
Is the 74VHC574MTR pinout compatible with older 74LS574 devices?
Yes - it is functionally and physically pin-compatible with 74LS574 and 74HC574, sharing identical pin assignments (OE, D0–D7, CK, Q0–Q7, GND, VCC) and SO-20 footprint. No PCB redesign is needed; however, verify timing margins due to faster propagation (≤10 ns vs. ~25 ns for LS) and lower drive current requirements.
Does 74VHC574MTR require external pull-up resistors on its outputs?
No - its 3-state outputs have no internal pull-ups; they present true high-impedance (Z) when OE is HIGH. External pull-ups are only needed if a defined logic level is required during tri-state periods (e.g., bus idle state), and must be sized considering leakage (±0.25 µA) and system noise margin.
74VHC574MTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74VHC
- 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:
- 115 MHz
- Max Propagation Delay @ V, Max CL:
- 10.6ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 7 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74VHC574MTR FAQ
1.How can I place an order for 74VHC574MTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHC574MTR 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 74VHC574MTR reliable?
The price and inventory of 74VHC574MTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHC574MTR is usually 5 days.
3.What payment methods are accepted for 74VHC574MTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHC574MTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHC574MTR?
74VHC574MTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHC574MTR 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 74VHC574MTR?
For technical support, including 74VHC574MTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHC574MTR requirements.
6.How does Aetrix verify that 74VHC574MTR is sourced from the original manufacturer or authorized distributors?
All 74VHC574MTR 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 74VHC574MTR meets industry standards.
7.What is the process for return or replacement of 74VHC574MTR?
All 74VHC574MTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VHC574MTR, 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 74VHC574MTR part is unused and in its original packaging.
Return procedure for 74VHC574MTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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