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Texas Instruments SN74ABT574DWR
- Part No.:
- SN74ABT574DWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74ABT574DWR.pdf
- Description:
- D-TYPE FLIP-FLOPS
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Product details
Overview
SN74ABT574DWR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin SOIC (DW) package, operating from 4.5 V to 5.5 V, delivering ±32-mA high-drive outputs and supporting up to 150-MHz clock frequency for bus interface applications in industrial control systems.
For engineers reviewing the SN74ABT574DWR datasheet, SN74ABT574DWR pinout, SN74ABT574DWR application, or SN74ABT574DWR equivalent, key selection criteria include its 3-state output enable timing (tPZH/tPLZ ≤ 5.1 ns), low ground bounce (<1 V), latch-up immunity (>500 mA), and compatibility with 5-V TTL/CMOS logic buses requiring bidirectional drive capability.
Technical Context
The SN74ABT574DWR implements eight independent positive-edge-triggered D flip-flops with synchronous data capture on CLK↑, where Q outputs reflect D inputs only at clock transition. Its buffered OE input controls all eight outputs simultaneously without affecting internal state retention or clocked operation.
This device uses TI's EPIC-IIB BiCMOS process to achieve high-speed switching (tPLH/tPHL ≤ 6.8 ns at 5 V, CL = 50 pF) while maintaining low power dissipation and robust ESD protection (>2000 V HBM). It supports hot-insertion-capable bus driving via fast 3-state enable/disable transitions and high-current sinking/sourcing capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL/CMOS systems and stable operation across industrial voltage tolerances. |
| Output Drive | –32 mA IOH / +64 mA IOL - enables direct driving of heavily loaded buses without external buffers or pull-ups. |
| Max Clock Frequency | 150 MHz - supports high-throughput data latching in real-time control and communication interfaces. |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns - guarantees tight timing margins in synchronous bus architectures with minimal skew. |
| 3-State Enable Time | tPZH ≤ 5.1 ns - allows rapid bus arbitration and multi-master contention resolution. |
| Input Clamp Current | –18 mA IIK - provides robust protection against transient overvoltage on data or clock lines. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial environments without derating. |
Pinout & Package
SN74ABT574DWR is housed in a 20-pin plastic small-outline integrated circuit (SOIC) package (DW suffix), measuring 7.5 mm × 12.8 mm with 1.27-mm pitch, optimized for surface-mount assembly and thermal performance up to 1.6 W in still air.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control enabling/disabling all eight Q outputs into high-impedance state; does not affect internal flip-flop operation. |
| 2–9 | D1–D8 (Data Inputs) | Asynchronous data inputs sampled on rising CLK edge; each feeds one D-type flip-flop stage. |
| 11 | GND | Power ground reference for logic and output stages; critical for minimizing ground bounce (VOLP < 1 V). |
| 12–19 | Q1–Q8 (Outputs) | 3-state buffered outputs reflecting latched D-input states; capable of –32 mA high-drive and +64 mA low-drive. |
| 20 | VCC | Positive supply rail (4.5–5.5 V); powers both logic core and high-drive output buffers. |
| 10 | CLK | Global clock input triggering simultaneous edge-sensitive capture across all eight flip-flops. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS Process | Reduces dynamic power consumption while sustaining 150-MHz operation and high-output current drive. |
| High-Drive Outputs | –32 mA IOH / +64 mA IOL eliminates need for external bus drivers in memory or peripheral interfaces. |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V ensures signal integrity during simultaneous output switching on shared bus lines. |
| Robust ESD Protection | >2000 V HBM and >200 V machine model rating protects against handling and board-level transients. |
| Latch-Up Immunity | Exceeds 500 mA per JEDEC JESD-17, preventing destructive parasitic thyristor activation under fault conditions. |
Applications
| Industrial PLC I/O Modules | Legacy Bus Interface Adapters |
|---|---|
Use Scenario: Isolating and latching sensor/actuator signals between microcontroller and field-side 5-V TTL buses in programmable logic controllers. IC Role / Device Role / Timing Role: Octal D-flip-flop providing synchronized input sampling and 3-state output buffering for bidirectional data exchange. Use Value: Enables deterministic scan-cycle timing with 150-MHz clock support and noise-immune 64-mA drive into long PCB traces. | Use Scenario: Bridging ISA or VMEbus peripherals to modern FPGA-based controllers requiring level-shifted, latched data paths. IC Role / Device Role / Timing Role: Data register holding parallel bus values during address decode latency, with OE-controlled bus release. Use Value: Eliminates external pull-ups and reduces component count via integrated high-drive 3-state outputs compatible with legacy 5-V bus standards. |
| Test Equipment Digital Pattern Generators | Automated Test Fixture Controllers |
Use Scenario: Generating precise, synchronized stimulus waveforms for IC functional testing using pattern memory and timing sequencers. IC Role / Device Role / Timing Role: Output register staging test vectors onto DUT pins with sub-7-ns propagation delay and glitch-free enable control. Use Value: Ensures setup/hold compliance (tsu = 1 ns, th = 1.5 ns) and clean bus transitions (tPZH ≤ 5.1 ns) for high-speed digital validation. | Use Scenario: Controlling relay banks, LED indicators, and solenoid drivers in production-line test fixtures interfacing with PC-based control software. IC Role / Device Role / Timing Role: Buffering and isolating host-generated control bits while providing local storage and bus decoupling. Use Value: Supports hot-swap-safe operation via OE-controlled high-Z state and withstands repeated in-circuit insertion cycles due to >500 mA latch-up immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT574PW | Lower drive (–24 mA / +24 mA), 3.3-V tolerant inputs, 100-MHz max clock, TSSOP-20 package. | Suitable for mixed-voltage 3.3-V/5-V systems but lacks SN74ABT574DWR's 64-mA sink capability for heavy bus loads. | Select when lower power and 3.3-V compatibility outweigh raw drive strength and speed requirements. |
| SN74LV574APW | 3.3-V only supply (2.7–3.6 V), –16 mA / +16 mA drive, 160-MHz max clock, same pinout in TSSOP-20. | Not pin-compatible with SN74ABT574DWR due to different VCC range and logic thresholds; requires level-shifting in 5-V systems. | Choose for new 3.3-V designs prioritizing speed and low static current, not for drop-in replacement in existing 5-V infrastructure. |
Compared with 74ACT574PW and SN74LV574APW, the SN74ABT574DWR delivers superior bus-driving capability (64-mA IOL) and full 5-V operation-making it optimal for legacy industrial backplanes and high-noise environments where signal integrity and load tolerance are critical.
Availability
SN74ABT574DWR is available at Aetrix Electronics and suitable for industrial automation, legacy bus interface design, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74ABT574DWR 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ABT574DWR belongs to TI's ABT advanced BiCMOS logic family, engineered for high-speed, high-drive 5-V bus interface applications where signal integrity, noise immunity, and thermal reliability are essential.
FAQ
What is the maximum clock frequency supported by the SN74ABT574DWR?
The SN74ABT574DWR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This specification is validated across the full industrial temperature range (–40°C to +85°C), making the SN74ABT574DWR suitable for real-time control loops and high-throughput data acquisition systems where deterministic timing is required.
Does the SN74ABT574DWR support hot-swap or live-insertion applications?
Yes, the SN74ABT574DWR supports hot-swap applications due to its robust 3-state output architecture, >500 mA latch-up immunity per JEDEC JESD-17, and >2000 V HBM ESD protection. When OE is held high (disabled), outputs enter high-impedance mode without disturbing bus voltage levels-enabling safe insertion/removal in powered-backplane systems. The SN74ABT574DWR also features low ground bounce (<1 V), reducing risk of system-level glitches during insertion events.
What is the purpose of the OE pin on the SN74ABT574DWR, and how should it be biased during power-up?
The OE (Output Enable) pin on the SN74ABT574DWR is an active-low control that places all eight Q outputs in high-impedance state when asserted high, independent of internal flip-flop state or clock activity. To ensure outputs remain in high-Z during power-up or power-down, OE must be tied to VCC through a pullup resistor; TI specifies minimum resistance based on driver sink capability-typically 4.7 kΩ to 10 kΩ for standard CMOS drivers. This prevents bus contention before system initialization completes.
Can the SN74ABT574DWR drive standard 50-pF TTL loads directly without external components?
Yes, the SN74ABT574DWR is explicitly characterized for CL = 50 pF and delivers tPLH/tPHL ≤ 6.8 ns under those conditions. Its ±32-mA/±64-mA output drive strength allows direct connection to multiple TTL inputs or long PCB traces without series termination or pull-up resistors. The SN74ABT574DWR's low ground bounce (<1 V) and fast 3-state transitions (tPZH ≤ 5.1 ns) further ensure signal fidelity across standard 5-V bus loads, eliminating need for interface components in most industrial implementations.
Is the SN74ABT574DWR pin-compatible with other octal D-flip-flop devices in SOIC-20 packages?
The SN74ABT574DWR follows the industry-standard 20-pin SOIC pinout for octal D-type flip-flops with 3-state outputs (e.g., 74LS574, 74HC574), sharing identical pin assignments for D1–D8, Q1–Q8, CLK, OE, VCC, and GND. However, electrical differences-including higher drive strength, faster timing, and BiCMOS input thresholds-mean functional substitution requires verification of timing margins, voltage compatibility, and load conditions. The SN74ABT574DWR is not a drop-in replacement for bipolar or CMOS-only variants without system-level validation.
SN74ABT574DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
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- Grade:
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- Qualification:
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- Supplier Device Package:
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SN74ABT574DWR FAQ
1.How can I place an order for SN74ABT574DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT574DWR 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 SN74ABT574DWR reliable?
The price and inventory of SN74ABT574DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT574DWR is usually 5 days.
3.What payment methods are accepted for SN74ABT574DWR?
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4.How is shipping managed for SN74ABT574DWR?
SN74ABT574DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT574DWR 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 SN74ABT574DWR?
For technical support, including SN74ABT574DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT574DWR requirements.
6.How does Aetrix verify that SN74ABT574DWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT574DWR 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 SN74ABT574DWR meets industry standards.
7.What is the process for return or replacement of SN74ABT574DWR?
All SN74ABT574DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT574DWR, 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 SN74ABT574DWR part is unused and in its original packaging.
Return procedure for SN74ABT574DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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