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Texas Instruments SN74AC574PWRG4
- Part No.:
- SN74AC574PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AC574PWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,858
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Product details
Overview
SN74AC574PWRG4 from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state outputs, designed for bus-oriented digital systems. It operates across 2V–6V VCC, supports 5V and 3.3V logic domains, delivers ≤8.5ns propagation delay at 5V, and drives high-capacitance loads directly-enabling use in I/O port buffering and bidirectional data bus control.
For engineers reviewing the SN74AC574PWRG4 datasheet, SN74AC574PWRG4 pinout, SN74AC574PWRG4 application, or SN74AC574PWRG4 equivalent, key selection criteria include its 20-pin TSSOP package, rising-edge clock triggering, independent output-enable control, and compatibility with mixed-voltage system interfaces requiring high-impedance bus isolation.
Technical Context
This device implements eight synchronous D-flip-flops sharing a common clock (CLK) input and a single active-low output-enable (OE) signal. Each flip-flop captures the state of its D-input on the rising edge of CLK and holds it until the next clock transition.
The 3-state outputs are fully decoupled from internal register operation: OE controls only output driver enablement, allowing data retention and new data loading while outputs remain high-impedance-critical for hot-swap and multi-master bus arbitration scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 6 V - supports direct interfacing with 3.3 V and 5 V logic families without level shifters |
| Max tpd (5 V) | 8.5 ns - enables reliable operation in high-speed digital control paths up to 85 MHz clock frequency |
| IOL/IOH (5 V) | ±24 mA - sufficient drive strength to directly terminate standard 50 Ω transmission lines or load 10+ CMOS inputs |
| Input Voltage Range | −0.5 V to VCC + 0.5 V - tolerant of overvoltage transients and mixed-supply signaling |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded controller and peripheral interface applications |
| Output Enable Propagation | tPZH/tPZL ≤ 9 ns (5 V) - ensures fast bus release for time-critical arbitration and multiplexing |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 6.4 mm body size, 1.2 mm max height, lead pitch 0.65 mm, thermal pad optional (GND or floating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Asserting low enables all Q outputs; high places them in high-impedance state without affecting internal register state |
| 2–9 (D1–D8) | Data inputs | Asynchronous inputs sampled on rising CLK edge; accept voltages up to VCC + 0.5 V |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents; must be low-impedance for noise immunity |
| 11 (CLK) | Clock input | Rising-edge triggered; minimum pulse width 5 ns at 5 V; synchronizes all eight flip-flops simultaneously |
| 12–19 (Q8–Q1) | Registered outputs | Tri-state outputs mirroring D-inputs after CLK↑; driven low/high or high-Z per OE state |
| 20 (VCC) | Positive supply | Power rail for logic core and output drivers; requires local 0.1 μF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2–6 V) | Enables interoperability between legacy 5 V and modern 3.3 V subsystems without external voltage translation |
| 3-state outputs with independent OE | Permits shared bus architectures where multiple devices drive the same line without contention or pull-up requirements |
| Low propagation delay (≤8.5 ns @ 5 V) | Supports timing-critical control loops and high-throughput data capture in programmable logic interfaces |
| High noise immunity (Δt/Δv ≥ 8 ns/V) | Rejects fast-rising EMI on clock and data lines, improving reliability in electrically noisy industrial environments |
| Input overvoltage tolerance | Accepts signals up to VCC + 0.5 V, simplifying interface design when driving from higher-voltage sources |
Applications
| Industrial PLC I/O Module | Embedded Microcontroller Bus Interface |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from high-capacitance field wiring in programmable logic controllers. IC Role / Device Role / Timing Role: Octal latch buffering parallel address/data bus lines between MCU and isolated I/O expansion cards. Use Value: Enables deterministic sampling of sensor/actuator states via synchronized CLK edge, while OE allows dynamic bus sharing among multiple peripheral modules. |
Use Scenario: Expanding limited GPIO count on ARM Cortex-M microcontrollers for parallel LCD or memory-mapped peripheral control. IC Role / Device Role / Timing Role: Synchronizing and latching 8-bit parallel data streams from MCU to external display or SRAM chips. Use Value: Provides clean, glitch-free output transitions with sub-10 ns timing margins, eliminating need for external glue logic or FPGA resources. |
| Test Equipment Digital Pattern Generator | Automotive Body Control Module |
Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional testing. IC Role / Device Role / Timing Role: Holding test vector bits under CLK control and driving them onto DUT pins via 3-state outputs during active phases. Use Value: Fast OE-controlled bus release (<9 ns) ensures accurate waveform edge placement and eliminates bus contention during pattern switching. |
Use Scenario: Managing discrete load switching (e.g., door locks, mirror controls) using MCU-controlled parallel outputs. IC Role / Device Role / Timing Role: Latching command bits from CAN/LIN gateway MCU and driving power FET gate drivers through buffered outputs. Use Value: Wide 2–6 V VCC range accommodates automotive battery voltage fluctuations (9–16 V with regulator), ensuring robust operation across cold-crank and load-dump conditions. |
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 VCC range (1.65–3.6 V); 3.3 V only; tpd = 6.1 ns @ 3.3 V | Optimized for low-voltage portable systems; not suitable for 5 V bus interfacing | Select when operating exclusively in 3.3 V domains and maximum speed >85 MHz is required |
| 74ACT574PW | Higher drive (±24 mA @ 5 V same), but narrower VCC (4.5–5.5 V); no 3.3 V support | Legacy 5 V-only designs; lacks mixed-voltage flexibility of SN74AC574PWRG4 | Choose only for drop-in replacement in existing 5 V-only boards with strict timing budgets |
Compared with SN74LVC574APWR and 74ACT574PW, SN74AC574PWRG4 uniquely balances 2–6 V operation, 8.5 ns speed at 5 V, and industrial temperature range-making it the preferred choice for mixed-supply embedded systems requiring bus isolation and timing predictability.
Availability
SN74AC574PWRG4 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded microcontroller bus expansion, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AC574PWRG4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability industrial and automotive components.
SN74AC574PWRG4 belongs to TI's AC logic family-designed for high-speed, low-power, mixed-voltage digital interfacing in industrial automation, test equipment, and automotive electronics.
FAQ
What is the maximum clock frequency supported by SN74AC574PWRG4 at 5 V?
At VCC = 5 V ± 0.5 V and TA = 25 °C, SN74AC574PWRG4 supports a maximum clock frequency of 85 MHz. This value is derived from timing requirements including minimum pulse width (5 ns) and setup/hold times (2 ns and 1.5 ns respectively), ensuring reliable edge-triggered operation in high-speed digital control paths.
Can SN74AC574PWRG4 operate with a 3.3 V supply?
Yes, SN74AC574PWRG4 is fully specified for 3.3 V operation (VCC = 3.3 V ± 0.3 V), delivering guaranteed performance including tpd ≤ 13.5 ns, fmax = 55 MHz, and compatible input/output voltage thresholds. Its 2–6 V range makes SN74AC574PWRG4 ideal for mixed-voltage system integration without level-shifting circuitry.
How does the output-enable (OE) pin function in SN74AC574PWRG4?
The OE pin on SN74AC574PWRG4 is an active-low control that places all eight Q outputs into high-impedance state when asserted high, regardless of CLK or D-input activity. Internal register contents remain unchanged, enabling data retention and new input sampling during bus arbitration-critical for multi-master systems and hot-swap capability.
Is SN74AC574PWRG4 RoHS compliant and what is its MSL rating?
Yes, SN74AC574PWRG4 is RoHS compliant (lead-free, NIPDAU finish) and carries a JEDEC MSL Level-1 rating with unlimited floor life at ≤30 °C/60% RH. Its peak reflow temperature is 260 °C, making it compatible with standard lead-free PCB assembly processes without special handling requirements.
What package type is used for SN74AC574PWRG4 and what are its key mechanical dimensions?
SN74AC574PWRG4 uses the TSSOP-20 (PW) package: 6.5 mm × 6.4 mm body size, 1.2 mm maximum height, 0.65 mm lead pitch, and 20 terminals. The package includes an exposed thermal pad that may be connected to GND or left floating-no solder mask defined opening is required per TI layout guidelines.
SN74AC574PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 153 MHz
- Max Propagation Delay @ V, Max CL:
- 9.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 4.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AC574PWRG4 FAQ
1.How can I place an order for SN74AC574PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC574PWRG4 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 SN74AC574PWRG4 reliable?
The price and inventory of SN74AC574PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC574PWRG4 is usually 5 days.
3.What payment methods are accepted for SN74AC574PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC574PWRG4 transactions.
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4.How is shipping managed for SN74AC574PWRG4?
SN74AC574PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC574PWRG4 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 SN74AC574PWRG4?
For technical support, including SN74AC574PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC574PWRG4 requirements.
6.How does Aetrix verify that SN74AC574PWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AC574PWRG4 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 SN74AC574PWRG4 meets industry standards.
7.What is the process for return or replacement of SN74AC574PWRG4?
All SN74AC574PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC574PWRG4, 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 SN74AC574PWRG4 part is unused and in its original packaging.
Return procedure for SN74AC574PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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