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Texas Instruments SN74ABT574AN
- Part No.:
- SN74ABT574AN
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT574AN.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:547
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Product details
Overview
SN74ABT574AN from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for high-drive bus interfacing in industrial and embedded systems. It features ±32-mA/±64-mA output drive, Ioff partial-power-down support, and operates at 5 V over −40°C to 85°C. Used in bidirectional bus drivers and I/O port buffering where robust signal integrity and bus contention avoidance are required.
For engineers reviewing the SN74ABT574AN datasheet, SN74ABT574AN pinout, SN74ABT574AN application, or SN74ABT574AN equivalent, key selection criteria include its 20-pin PDIP package, positive-edge clock triggering, independent output-enable control, and compatibility with TTL-level logic systems requiring high-current sinking/sourcing capability.
Technical Context
This device implements eight synchronous D-type latches triggered on the rising edge of CLK, with each Q output reflecting the corresponding D input state after propagation delay. The buffered OE input controls all eight outputs simultaneously, placing them in high-impedance (Z) state without affecting internal latch operation or data retention.
Its architecture supports partial-power-down via Ioff circuitry that disables outputs when VCC = 0 V, preventing backflow current. Ground bounce (VOLP < 1 V) and latch-up immunity (>500 mA per JESD17) ensure stable operation in noisy, high-capacitance bus environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type flip-flop with 3-state outputs - enables time-synchronized data capture and bus isolation |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS systems |
| Output Drive | −32 mA IOH / +64 mA IOL - drives heavy capacitive loads or low-impedance buses without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns @ 5 V - supports clock frequencies up to 150 MHz in synchronous designs |
| Ioff Support | Active at VCC = 0 V - prevents damaging current flow during hot-insertion or power sequencing |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications |
| ESD Rating | 2000-V HBM, 200-V MM - withstands handling and board-level electrostatic discharge events |
Pinout & Package
The SN74ABT574AN is housed in a 20-pin plastic dual in-line package (PDIP-N), with 0.3-inch body width and standard through-hole mounting. Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data inputs (1D–8D) | Asynchronous parallel data inputs synchronized to CLK rising edge |
| 9 | GND | Power ground reference for all internal logic and output stages |
| 10 | VCC | +5-V supply for core logic and output drivers |
| 11, 12, 13, 14, 15, 16, 17, 18 | Outputs (1Q–8Q) | 3-state buffered outputs controlled by OE; high-Z when OE = high |
| 19 | CLK | Positive-edge-triggered clock input - initiates synchronous data transfer to Q outputs |
| 20 | OE | Active-low output-enable - asserts normal logic states when low; enables high-Z when high |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | Delivers −32 mA (source) and +64 mA (sink) to directly drive terminated transmission lines or multiple TTL inputs |
| Ioff Partial-Power-Down | Disables outputs at VCC = 0 V, enabling safe insertion into live backplanes or hot-swap I/O subsystems |
| Low Ground Bounce | VOLP < 1 V ensures minimal noise coupling into shared ground planes during simultaneous output switching |
| Latch-Up Immunity | Exceeds 500 mA per JESD17 - prevents destructive latch-up under transient overvoltage or ESD stress |
| 3-State Output Control | Single OE pin manages all eight outputs, simplifying bus arbitration logic and reducing PCB routing complexity |
Applications
| Industrial Bus Interface | Embedded I/O Expansion |
|---|---|
Use Scenario: Interfacing microcontroller GPIO ports to legacy parallel buses (e.g., ISA, PC/104) with termination and load matching requirements. IC Role / Device Role / Timing Role: Acts as a bidirectional data latch and bus driver, synchronizing host writes/reads while isolating bus capacitance from controller pins. Use Value: Eliminates need for discrete pull-up resistors or buffer ICs due to ±64-mA drive strength and 3-state control. | Use Scenario: Expanding digital I/O count on programmable logic controllers (PLCs) or motor control boards with limited MCU pins. IC Role / Device Role / Timing Role: Provides eight synchronized, clocked input latches and output registers with independent enable control per direction. Use Value: Enables deterministic sampling of sensor inputs and glitch-free actuator updates using single CLK and OE timing signals. |
| Test Equipment Data Capture | Digital Signal Acquisition |
Use Scenario: Capturing parallel digital waveforms from FPGA or ASIC test points at speeds up to 150 MHz. IC Role / Device Role / Timing Role: Edge-triggered acquisition node that freezes asynchronous signals on CLK edge and holds data for serial readout. Use Value: Achieves sub-7-ns setup/hold times and low VOLP to preserve signal fidelity across multi-channel capture systems. | Use Scenario: Buffering ADC output words in real-time data loggers where bus contention must be avoided during memory write cycles. IC Role / Device Role / Timing Role: Isolates high-speed ADC data bus from slower memory controller using OE-controlled 3-state outputs. Use Value: Prevents bus conflicts during concurrent read/write operations while maintaining full 8-bit throughput at 150-MHz clock rates. |
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 |
|---|---|---|---|
| SN74ABT574ADWR | Same logic function and electrical specs; SOIC-20 package with tape-and-reel delivery | Suitable for automated SMT assembly; requires PCB redesign from through-hole to surface-mount | Select for volume production with pick-and-place manufacturing and space-constrained layouts |
| SN74ABT574ANSR | Identical functionality; SOP-20 package with 2000-piece tape-and-reel packaging | Offers smaller footprint than PDIP but wider pitch than TSSOP; compatible with standard SOP reflow profiles | Choose when upgrading from PDIP to surface-mount without changing layout density or thermal profile constraints |
Compared with SN74ABT574ADWR and SN74ABT574ANSR, the SN74ABT574AN provides through-hole mechanical stability and ease of prototyping, while retaining identical timing, drive strength, and Ioff behavior - making it ideal for lab validation, low-volume industrial modules, and legacy system upgrades.
Availability
SN74ABT574AN is available at Aetrix Electronics and suitable for industrial bus interface, embedded I/O expansion, and test equipment data capture requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT574AN 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 for industrial, automotive, and communications markets.
The SN74ABT574AN belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V TTL-compatible applications where bus loading, noise immunity, and power sequencing reliability are critical design factors.
FAQ
What is the maximum clock frequency supported by the SN74ABT574AN?
The SN74ABT574AN supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). Its tPLH/tPHL propagation delays are guaranteed ≤ 6.8 ns, enabling reliable operation in high-speed synchronous data paths. At temperature extremes or lower supply voltages, timing margins should be verified using worst-case values from the datasheet.
Does the SN74ABT574AN support hot-swap or partial-power-down operation?
Yes, the SN74ABT574AN includes Ioff circuitry that actively disables all outputs when VCC = 0 V, preventing damaging current backflow during hot-insertion or uncontrolled power sequencing. This feature is explicitly characterized and meets JEDEC JESD78 requirements, making SN74ABT574AN suitable for modular backplane and field-replaceable unit designs.
How does the output-enable (OE) pin behave during power-up?
To ensure outputs remain in high-impedance during power-up or power-down, OE should be tied to VCC through a pullup resistor. The minimum resistor value depends on the driver's current-sinking capability; TI recommends ≥ 4.7 kΩ for typical microcontroller GPIO drivers. This guarantees OE remains high until system logic asserts active-low control, preventing bus contention.
Can the SN74ABT574AN drive standard 50-pF transmission lines directly?
Yes, the SN74ABT574AN is specifically designed for driving highly capacitive loads, with switching characteristics characterized at CL = 50 pF. Its ±64-mA low-state output current and fast tPLZ/tPZL disable times (<7 ns) allow direct connection to unterminated or lightly terminated lines without signal degradation or excessive rise/fall time distortion.
What is the purpose of the ground-bounce specification (VOLP < 1 V) for the SN74ABT574AN?
The VOLP (output ground bounce) specification quantifies voltage noise induced on the GND pin during simultaneous low-to-high output transitions. At <1 V under VCC = 5 V and TA = 25°C, this ensures minimal coupling into shared ground planes - critical for mixed-signal systems where analog sections must remain unaffected by digital switching noise generated by SN74ABT574AN's high-current outputs.
SN74ABT574AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74ABT574AN FAQ
1.How can I place an order for SN74ABT574AN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT574AN 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 SN74ABT574AN reliable?
The price and inventory of SN74ABT574AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT574AN is usually 5 days.
3.What payment methods are accepted for SN74ABT574AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT574AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT574AN?
SN74ABT574AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT574AN 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 SN74ABT574AN?
For technical support, including SN74ABT574AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT574AN requirements.
6.How does Aetrix verify that SN74ABT574AN is sourced from the original manufacturer or authorized distributors?
All SN74ABT574AN 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 SN74ABT574AN meets industry standards.
7.What is the process for return or replacement of SN74ABT574AN?
All SN74ABT574AN units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT574AN, 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 SN74ABT574AN part is unused and in its original packaging.
Return procedure for SN74ABT574AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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