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Texas Instruments SN74ABT574ANSRG4
- Part No.:
- SN74ABT574ANSRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT574ANSRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,574
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Product details
Overview
SN74ABT574ANSRG4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for high-speed bus interface and data latching in 5-V TTL-compatible systems. It features ±32-mA/±64-mA drive strength, Ioff partial-power-down support, and operates across −40°C to 85°C. Used in bidirectional bus drivers and I/O port registers where low ground bounce (<1 V) and fast 150-MHz clocking are required.
For engineers reviewing the SN74ABT574ANSRG4 datasheet, SN74ABT574ANSRG4 pinout, SN74ABT574ANSRG4 application, or SN74ABT574ANSRG4 equivalent, key selection criteria include 3-state output timing (tPZL ≤ 5.9 ns), latch-up immunity (>500 mA), ESD robustness (2000-V HBM), and compatibility with SOP-20 PCB layouts requiring no redesign for drop-in replacement in legacy ABT logic designs.
Technical Context
This device implements eight independent positive-edge-triggered D flip-flops with a shared clock (CLK) and output-enable (OE) control. Each Q output updates synchronously on CLK rising edge while OE determines whether outputs drive logic levels or enter high-impedance state-without affecting internal storage.
The architecture supports partial-power-down via Ioff circuitry that disables outputs when VCC = 0 V, preventing backflow current. Input transition rate tolerance (5 ns/V) and guaranteed setup/hold times (tsu = 1.5 ns, th = 1.8 ns at VCC = 5 V) enable reliable operation in noise-prone digital buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ABT (Advanced BiCMOS TTL), 5-V supply compatible with TTL input thresholds |
| Output Drive | −32 mA IOH / +64 mA IOL - sufficient to drive 50-pF loads at 150 MHz without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns - ensures sub-7-ns timing margin for 150-MHz synchronous buses |
| 3-State Enable Time | tPZL ≤ 5.9 ns - enables rapid bus release for time-multiplexed peripheral access |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Ioff Support | Active at VCC = 0 V - prevents current backflow during hot-swap or power sequencing |
| ESD Rating | 2000-V HBM - meets JEDEC JESD22-A114A for handling robustness in manufacturing environments |
Pinout & Package
SN74ABT574ANSRG4 uses a 20-pin SOP (Small Outline Package) with 0.65-mm lead pitch and 7.5-mm body width per TI DB0020A package drawing. Pin 1 is located at the top-left corner with index marking adjacent to pin 1 pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 (1D–8D) | Data inputs | Asynchronous D inputs feeding respective flip-flop stages; TTL-compatible thresholds (VIH = 2 V, VIL = 0.8 V) |
| 9 | GND | Ground reference for all logic and output circuits; requires low-inductance connection to minimize ground bounce |
| 10 | VCC | 5-V power supply; decoupling capacitor (0.1 µF ceramic) recommended within 5 mm of pin |
| 11–18 (1Q–8Q) | 3-state outputs | Edge-triggered Q outputs; high-impedance when OE = high, capable of driving 50-pF loads directly |
| 19 | CLK | Positive-edge clock input; minimum pulse width 3.3 ns; synchronizes all eight flip-flops simultaneously |
| 20 | OE | Active-low output-enable; tied to VCC via pullup resistor during power-up to ensure safe high-Z default state |
Key Features
| Feature | Design Value |
|---|---|
| High-drive 3-state outputs | Delivers ±32-mA/±64-mA sink/source to eliminate need for external bus transceivers in medium-load applications |
| Ioff partial-power-down protection | Disables outputs at VCC = 0 V, enabling safe insertion/removal in live backplanes without damaging downstream circuitry |
| Low ground bounce (VOLP < 1 V) | Minimizes signal integrity degradation during simultaneous output switching-critical for noise-sensitive analog co-location |
| Latch-up immunity >500 mA | Exceeds JEDEC JESD17 requirements, ensuring reliability in high-current transient environments like motor control I/O |
| TTL-compatible input thresholds | Accepts standard 5-V TTL logic levels (VIH ≥ 2 V, VIL ≤ 0.8 V), enabling direct interfacing with legacy microcontrollers and FPGAs |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
Use Scenario: Adding isolated digital input/output channels to programmable logic controllers using existing 5-V backplane infrastructure. IC Role / Device Role / Timing Role: Acts as an octal latch and 3-state buffer between microcontroller GPIO and field-side bus lines, synchronized by system clock. Use Value: Eliminates need for discrete level shifters or bus buffers due to native 5-V drive strength and TTL compatibility. |
Use Scenario: Bridging ISA or VMEbus peripherals to modern FPGA-based host controllers requiring precise timing alignment. IC Role / Device Role / Timing Role: Provides edge-aligned data capture and controlled bus release via OE, enabling cycle-accurate read/write handshaking. Use Value: Achieves 150-MHz bus throughput with tPZL ≤ 5.9 ns, reducing wait states and improving overall system bandwidth. |
| Test Equipment Digital Pattern Generator | Automated Test Fixture Control |
Use Scenario: Generating synchronized multi-bit stimulus waveforms for IC functional testing under automated test equipment (ATE) control. IC Role / Device Role / Timing Role: Stores pattern bits on CLK edge and drives them onto parallel test pins; OE enables dynamic pin direction control. Use Value: Supports sub-7-ns propagation delay and 3.3-ns minimum clock pulse width for high-resolution timing generation. |
Use Scenario: Controlling solenoid valves, relays, and sensors in production-line test fixtures with real-time response requirements. IC Role / Device Role / Timing Role: Latches control commands from MCU and drives high-current loads through external drivers, with OE used for safe power-down sequencing. Use Value: Ioff functionality prevents backfeed into powered-down sections during fixture reconfiguration, enhancing safety and repeatability. |
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 |
|---|---|---|---|
| SN74ABT574ADBRG4 | Identical electrical specs and timing; SSOP-20 package (7.4-mm width) vs. SOP-20 (7.5-mm width); same pinout and thermal resistance (60°C/W) | SSOP offers higher board density but requires tighter stencil design for solder paste release | Select for space-constrained PCBs where footprint reduction outweighs assembly process complexity |
| SN74ABT574APWR | TSSOP-20 package (4.4-mm width); identical logic function and AC/DC specs; slightly higher θJA (83°C/W) than SOP-20 (60°C/W) | TSSOP enables ultra-compact routing but demands stricter thermal management in sustained high-drive operation | Choose when board area is critical and ambient temperature remains below 70°C with adequate airflow |
Compared with SN74ABT574ANSRG4, SN74ABT574ADBRG4 provides identical performance in a marginally narrower SSOP body, while SN74ABT574APWR trades thermal efficiency for maximum miniaturization-both require no schematic changes but may need layout adjustments for thermal relief or solder mask definition.
Availability
SN74ABT574ANSRG4 is available at Aetrix Electronics and suitable for industrial automation, legacy bus interface, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ABT574ANSRG4 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 over 90 years of innovation in high-reliability digital interfaces.
The ABT logic family-including SN74ABT574ANSRG4-is engineered for robust 5-V TTL-compatible bus interfacing in industrial and communications systems demanding high drive, low noise, and power sequencing resilience.
FAQ
What is the maximum clock frequency supported by SN74ABT574ANSRG4?
The SN74ABT574ANSRG4 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This is validated by timing parameters including minimum clock pulse width (tw = 3.3 ns) and propagation delays (tPLH/tPHL ≤ 6.8 ns), making SN74ABT574ANSRG4 suitable for high-speed synchronous data capture in industrial bus architectures.
Does SN74ABT574ANSRG4 support partial-power-down mode?
Yes, SN74ABT574ANSRG4 includes Ioff circuitry that actively disables outputs when VCC = 0 V, preventing damaging current backflow during hot-swap or staged power sequencing. This feature is explicitly specified in the datasheet with Ioff ≤ ±100 µA at VI or VO ≤ 4.5 V, confirming SN74ABT574ANSRG4's suitability for systems requiring live insertion capability.
What is the recommended power-up sequence for SN74ABT574ANSRG4?
To ensure outputs remain in high-impedance state during power-up, OE must be held high (inactive) until VCC stabilizes. TI recommends tying OE to VCC through a pullup resistor (value determined by driver sink capability); SN74ABT574ANSRG4's internal design guarantees safe default behavior only when OE is not floating, as confirmed in the functional description section of the datasheet.
Can SN74ABT574ANSRG4 drive 50-pF loads at full speed?
Yes, SN74ABT574ANSRG4's switching characteristics are characterized with CL = 50 pF, showing tPLH/tPHL ≤ 6.8 ns and fmax = 150 MHz. Its ±32-mA/±64-mA drive strength ensures clean signal edges into typical PCB trace and connector capacitance, eliminating need for external line drivers when interfacing with standard 50-pF bus loads.
Is SN74ABT574ANSRG4 pin-compatible with older SN74ABT574 variants?
Yes, SN74ABT574ANSRG4 shares identical pinout, logic function, and AC/DC specifications with other SN74ABT574A variants (e.g., SN74ABT574ADBRG4, SN74ABT574APWR) across SOP, SSOP, and TSSOP packages. The "G4" suffix denotes RoHS-compliant NiPdAu lead finish, with no functional or mechanical differences affecting PCB layout compatibility.
SN74ABT574ANSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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:
- 200 MHz
- Max Propagation Delay @ V, Max CL:
- 6.6ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 250 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74ABT574ANSRG4 FAQ
1.How can I place an order for SN74ABT574ANSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT574ANSRG4 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 SN74ABT574ANSRG4 reliable?
The price and inventory of SN74ABT574ANSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT574ANSRG4 is usually 5 days.
3.What payment methods are accepted for SN74ABT574ANSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT574ANSRG4 transactions.
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4.How is shipping managed for SN74ABT574ANSRG4?
SN74ABT574ANSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT574ANSRG4 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 SN74ABT574ANSRG4?
For technical support, including SN74ABT574ANSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT574ANSRG4 requirements.
6.How does Aetrix verify that SN74ABT574ANSRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT574ANSRG4 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 SN74ABT574ANSRG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT574ANSRG4?
All SN74ABT574ANSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT574ANSRG4, 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 SN74ABT574ANSRG4 part is unused and in its original packaging.
Return procedure for SN74ABT574ANSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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