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Texas Instruments SN74ABT574ANSR
- Part No.:
- SN74ABT574ANSR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT574ANSR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:753
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Product details
Overview
SN74ABT574ANSR 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 industrial control and communications systems. It operates at 4.5–5.5 V, delivers ±32-mA/±64-mA drive strength, supports partial-power-down via Ioff, and features 150-MHz clock frequency with 1.0-ns setup time (high-level data) at VCC = 5 V.
For engineers reviewing the SN74ABT574ANSR datasheet, SN74ABT574ANSR pinout, SN74ABT574ANSR application, or SN74ABT574ANSR equivalent, this device is selected for high-drive bidirectional bus buffering, I/O port expansion, and noise-immune register storage where output enable control and ground-bounce suppression (<1 V VOLP) are critical.
Technical Context
The SN74ABT574ANSR implements eight independent positive-edge-triggered D flip-flops, each synchronizing input data to the rising edge of CLK. Its buffered OE input controls all eight outputs simultaneously, placing them in high-impedance without affecting internal state retention.
It uses ABT (Advanced BiCMOS Technology) logic, enabling TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V), low propagation delays (tPLH/tPHL ≤ 6.8 ns), and robust latch-up immunity (>500 mA per JESD17). Ioff circuitry ensures safe operation during partial power-down by disabling outputs when VCC = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type flip-flop with 3-state outputs - enables synchronized data capture and bus isolation. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS systems and tolerant of supply ripple. |
| Output Drive | −32 mA IOH / +64 mA IOL - drives heavy capacitive loads (e.g., backplane traces, multiple inputs) without external buffers. |
| Timing Performance | 150 MHz max clock frequency, 1.0 ns tsu(H), 1.8 ns th - supports high-throughput digital interfaces up to 150 MSPS. |
| Ioff Support | Active at VCC = 0 V - prevents backflow current during hot-swap or partial system power-down, protecting upstream drivers. |
| ESD Protection | 2000-V HBM, 200-V MM - meets industrial handling requirements without additional protection circuitry. |
| Operating Temperature | −40°C to +85°C - qualified for extended industrial environments including factory automation and telecom infrastructure. |
Pinout & Package
SOP-20 (NS package), 7.5 mm × 13.0 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 11–18 | Data inputs (1D–8D) and outputs (1Q–8Q) | Paired D/Q channels (1D→1Q, ..., 8D→8Q); inputs sample on CLK↑, outputs reflect stored state or high-Z per OE. |
| 9 | GND | Power return reference for all logic and output stages; requires low-inductance connection to minimize ground bounce. |
| 10 | VCC | 5-V supply rail; decoupling capacitor (0.1 µF ceramic) required within 1 cm for stable switching performance. |
| 19 | CLK | Global positive-edge clock; all eight flip-flops trigger simultaneously - critical for synchronous bus timing alignment. |
| 20 | OE | Active-low output enable; asserts high-impedance state on all Q outputs without resetting internal latched data. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | −32 mA IOH / +64 mA IOL enables direct driving of 50-pF loads at full speed without signal degradation. |
| Ioff Partial-Power-Down | Blocks current flow when VCC = 0 V, allowing safe insertion/removal in live backplanes or mixed-voltage subsystems. |
| Low Ground Bounce | VOLP < 1 V at 5 V/25°C ensures signal integrity during simultaneous output switching across all eight channels. |
| Latch-Up Immunity | Exceeds 500 mA per JESD17 - eliminates risk of destructive latch-up under transient overvoltage or ESD stress. |
| TTL-Compatible Inputs | VIH = 2 V, VIL = 0.8 V allows seamless interfacing with legacy 5-V microcontrollers, FPGAs, and ASICs. |
Applications
| Industrial PLC I/O Expansion | Telecom Line Card Data Buffering |
|---|---|
|
Use Scenario: Expanding discrete I/O points on a programmable logic controller rack using parallel bus architecture. IC Role / Device Role / Timing Role: Acts as an output latch and input register, isolating field-side signals from the controller's main bus while maintaining precise edge-aligned sampling. Use Value: Enables deterministic scan-cycle timing with 1.0-ns setup margin and 64-mA drive to energize relay coils or optocouplers directly. |
Use Scenario: Buffering parallel status and configuration data between FPGA-based packet processors and PHY-layer transceivers. IC Role / Device Role / Timing Role: Serves as a high-speed bidirectional bus interface, synchronizing control words and status flags across clock domains with minimal skew. Use Value: Delivers 150-MHz throughput and sub-7-ns propagation delay, eliminating need for external level shifters or repeaters. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
|
Use Scenario: Managing multiplexed sensor inputs and actuator outputs in a centralized vehicle body controller. IC Role / Device Role / Timing Role: Functions as a fault-tolerant register bank, retaining state during sleep/wake transitions and supporting hot-plug diagnostics. Use Value: Ioff protection prevents backfeed into powered-down domains; −40°C to +85°C rating ensures reliability across cabin temperature extremes. |
Use Scenario: Generating precise, repeatable digital stimulus waveforms for IC functional testing in ATE systems. IC Role / Device Role / Timing Role: Provides deterministic, edge-aligned pattern storage with fast OE-controlled output release for test vector sequencing. Use Value: 1.8-ns hold time and 2.2-ns tPLH guarantee nanosecond-level timing accuracy essential for high-speed digital validation. |
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 |
|---|---|---|---|
| SN74ABT574ADBR | SSOP-20 package (DB), 7.4 mm × 5.6 mm, 0.65 mm pitch - smaller footprint but higher thermal resistance (θJA = 70°C/W vs. NS θJA = 60°C/W). | Better suited for space-constrained PCBs; less optimal for sustained high-current output operation due to thermal limits. | Select SN74ABT574ADBR when board area is critical and average output loading remains below 40 mA per pin. |
| SN74ABT574APWR | TSSOP-20 package (PW), 6.5 mm × 4.4 mm, 0.65 mm pitch - lowest profile (1.2 mm max height) and best thermal performance among surface-mount variants (θJA = 83°C/W, but superior heat spreading). | Preferred for ultra-thin modules and automated optical inspection (AOI)-friendly layouts; requires tighter stencil design for solder paste release. | Choose SN74ABT574APWR for portable or stacked-module designs where Z-height and manufacturability outweigh minor layout complexity. |
Compared with SN74ABT574ADBR and SN74ABT574APWR, the SN74ABT574ANSR offers balanced thermal performance (θJA = 60°C/W), proven SOP-20 manufacturability, and industry-standard land patterns - making it the most broadly deployable option for general-purpose industrial and telecom applications.
Availability
SN74ABT574ANSR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, telecom line card buffering, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SN74ABT574ANSR 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 experience in high-reliability industrial and automotive IC design.
The SN74ABT574ANSR belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V digital interfacing - targeting applications demanding robust noise immunity, bus contention control, and seamless integration with legacy TTL systems.
FAQ
What is the maximum clock frequency supported by the SN74ABT574ANSR?
The SN74ABT574ANSR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This is confirmed in the timing requirements table of the official datasheet (SCBS191F, p.5), where fclock(min/max) is specified as 150 MHz for the SN74ABT574A variant. The SN74ABT574ANSR is a member of that family and shares identical AC characteristics.
Does the SN74ABT574ANSR support partial-power-down operation?
Yes, the SN74ABT574ANSR supports partial-power-down via its Ioff circuitry. When VCC = 0 V and any input or output voltage is ≤ 4.5 V, Ioff limits current to ±100 µA (max), preventing damaging backflow. This feature is explicitly documented in the "Features" section and electrical characteristics table (SCBS191F, pp.1,4) and applies directly to the SN74ABT574ANSR as a production-grade SN74ABT574A variant.
What is the output drive capability of the SN74ABT574ANSR?
The SN74ABT574ANSR provides high-drive outputs rated at −32 mA (IOH) and +64 mA (IOL) under recommended operating conditions. These values are specified in the "Features" summary (p.1) and confirmed in the "Recommended Operating Conditions" table (p.3) for the SN74ABT574A family, to which SN74ABT574ANSR belongs. This drive strength enables direct interfacing with heavy capacitive loads or multiple TTL inputs without external buffers.
Is the SN74ABT574ANSR pin-compatible with other packages in the same family?
Yes, the SN74ABT574ANSR (SOP-20/NS) shares identical pinout and functionality with other SN74ABT574A variants in SOIC (DW), SSOP (DB), TSSOP (PW), and PDIP (N) packages. The "Terminal Assignments" diagram (p.2) and ordering table (p.1) confirm consistent 20-pin mapping across all packages, including GND (pin 9), VCC (pin 10), CLK (pin 19), OE (pin 20), and paired D/Q channels (pins 1–8, 11–18).
What is the operating temperature range for the SN74ABT574ANSR?
The SN74ABT574ANSR is rated for an operating free-air temperature range of −40°C to +85°C, as stated in the "Ordering Information" table (p.1) and "Recommended Operating Conditions" (p.3) of the datasheet. This industrial-grade specification applies specifically to the SN74ABT574ANSR and distinguishes it from military-grade SN54ABT574 variants (−55°C to +125°C).
SN74ABT574ANSR 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74ABT574ANSR FAQ
1.How can I place an order for SN74ABT574ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT574ANSR 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 SN74ABT574ANSR reliable?
The price and inventory of SN74ABT574ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT574ANSR is usually 5 days.
3.What payment methods are accepted for SN74ABT574ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT574ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT574ANSR?
SN74ABT574ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT574ANSR 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 SN74ABT574ANSR?
For technical support, including SN74ABT574ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT574ANSR requirements.
6.How does Aetrix verify that SN74ABT574ANSR is sourced from the original manufacturer or authorized distributors?
All SN74ABT574ANSR 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 SN74ABT574ANSR meets industry standards.
7.What is the process for return or replacement of SN74ABT574ANSR?
All SN74ABT574ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT574ANSR, 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 SN74ABT574ANSR part is unused and in its original packaging.
Return procedure for SN74ABT574ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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