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NXP Semiconductors 74ABT574AD,118
- Part No.:
- 74ABT574AD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT574AD,118.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,019
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Product details
Overview
74ABT574AD,118 from NXP Semiconductors is an octal D-type edge-triggered flip-flop with 3-state outputs, designed for high-speed bus interfacing in 5 V TTL-compatible systems. It features 8-bit data latching on rising clock edge, independent 3-state output enable (active LOW), and operates across −40 °C to +85 °C. Its SO20 package supports microprocessor data bus buffering in industrial control and memory interface applications.
For engineers reviewing the 74ABT574AD,118 datasheet, 74ABT574AD,118 pinout, 74ABT574AD,118 application, or 74ABT574AD,118 equivalent, key selection criteria include propagation delay (≤5.1 ns), output drive strength (−32 mA HIGH / 64 mA LOW), 3-state timing (tPZH ≤ 5.0 ns), power-on reset behavior, and SO20 flow-through pinout compatibility with PCB layout constraints.
Technical Context
The 74ABT574AD,118 implements eight independent D-type flip-flops, each triggered by the rising edge of CP, with synchronous data capture and asynchronous 3-state control via OE. Its BiCMOS architecture enables low static current (≤250 µA) while sustaining 400 MHz maximum clock frequency at 25 °C and 125 MHz across full temperature range.
All eight outputs share a common active-LOW OE input that overrides clock operation-enabling bus isolation without clock dependency. The device includes power-on 3-state and latch-up protection exceeding 500 mA per JESD78B Class II Level A, supporting live insertion in backplane and modular systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Type | Octal D-type positive-edge-triggered flip-flop with 3-state outputs |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and CMOS buses |
| Max Clock Frequency | 125 MHz (−40 °C to +85 °C) - supports high-throughput data transfer in real-time control systems |
| tPLH / tPHL | 1.5–5.0 ns - enables sub-5 ns signal path timing for tight setup/hold budgets |
| IOL / IOH | 64 mA / −32 mA - drives heavily loaded 3-state buses, MOS memories, and microprocessor data lines |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded and automation equipment |
| ESD Protection | HBM >2000 V, MM >200 V - withstands handling and board-level electrostatic events |
Pinout & Package
74ABT574AD,118 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, gull-wing leads, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable input | Active-LOW global control for all eight Q outputs; independent of clock operation |
| 2–9 (D0–D7) | Data inputs | Synchronous data capture one setup time before rising CP edge |
| 10 (GND) | Ground reference | 0 V return path for logic and output drivers; must be low-impedance |
| 11 (CP) | Clock pulse input | Rising-edge-triggered latch control; defines sampling instant for Dn→Qn transfer |
| 12–19 (Q7–Q0) | 3-state flip-flop outputs | Flow-through pinout: outputs opposite inputs for simplified PCB routing to microprocessors |
| 20 (VCC) | Supply voltage | +4.5 V to +5.5 V DC power rail; decoupling required near pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout (SO20) | Inputs (pins 2–9) and outputs (pins 12–19) on opposite sides - reduces trace crossovers and eases microprocessor bus interface layout |
| Power-on 3-state | Outputs default to high-impedance at power-up - prevents bus contention during system initialization |
| Live insertion/extraction support | Latch-up immunity >500 mA and ESD robustness enable hot-swap capability in modular backplanes |
| Common output enable | Single OE pin controls all eight outputs - simplifies bus arbitration logic and reduces GPIO count |
| BiCMOS process | Combines bipolar speed and CMOS low static power - achieves 125 MHz operation with ICC ≤ 250 µA (disabled state) |
Applications
| Industrial PLC Data Bus Buffering | Memory Interface Latching |
|---|---|
Use Scenario: Isolating and latching parallel I/O data between a microcontroller and distributed I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Acts as a synchronized 8-bit data register with 3-state outputs, enabling bidirectional bus sharing and deterministic read/write timing. Use Value: Ensures glitch-free data capture at up to 125 MHz while preventing bus contention via OE-controlled high-impedance states during idle cycles. |
Use Scenario: Holding address or data signals between a CPU and SRAM or EPROM in embedded instrumentation systems. IC Role / Device Role / Timing Role: Provides edge-triggered storage of 8-bit data with precise setup/hold times (tsu ≥ 1.0 ns, th ≥ 1.0 ns) referenced to CP rising edge. Use Value: Guarantees reliable memory access timing under industrial temperature extremes (−40 °C to +85 °C) with VOL ≤ 0.55 V at 64 mA load. |
| Microprocessor System Bus Expansion | Digital Signal Processor (DSP) Data Path Interface |
Use Scenario: Expanding the data bus width of an 8-bit microprocessor to support peripheral co-processors or external peripherals. IC Role / Device Role / Timing Role: Functions as a transparent 8-bit latch buffer with flow-through SO20 pinout - minimizing PCB trace length and skew between Dn and Qn pairs. Use Value: Delivers tPLH/tPHL ≤ 5.0 ns and tPZH/tPHZ ≤ 5.0 ns, enabling clean signal integrity on shared 5 V TTL buses with minimal added latency. |
Use Scenario: Interfacing a DSP's parallel data port to external ADC/DAC or FIFO buffers in real-time audio or motor control systems. IC Role / Device Role / Timing Role: Serves as a synchronized handshake register, capturing DSP output data on CP edge and presenting it to downstream logic only when OE is asserted. Use Value: Leverages power-on 3-state and live-insertion tolerance to support field-upgradable DSP daughterboards without system reset. |
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 |
|---|---|---|---|
| SN74ABT574N | DIP20 package (SOT146-1); identical electrical specs and pinout but through-hole mounting | Preferred for prototyping, legacy board repair, or mixed-technology assemblies requiring through-hole components | Select SN74ABT574N when manual soldering, breadboarding, or mechanical robustness in vibration-prone environments is prioritized over PCB space savings. |
| 74LVTH574PW | Lower voltage operation (2.7–3.6 V), LVTH logic family; 3.3 V compatible with reduced power and different VIH/VIL thresholds | Targeted for 3.3 V systems; not directly interchangeable due to supply and level-shifting requirements | Choose 74LVTH574PW only in new 3.3 V designs where lower ICC and reduced EMI are critical - requires level translation if interfacing with 5 V logic. |
Compared with 74ABT574AD,118, SN74ABT574N offers identical functionality in through-hole form for ease of integration in non-SMT environments, while 74LVTH574PW serves distinct low-voltage domains and demands careful voltage domain partitioning - neither is pin-compatible without redesign.
Availability
74ABT574AD,118 is available at Aetrix Electronics and suitable for industrial PLC data bus buffering, memory interface latching, and microprocessor system bus expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT574AD,118 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74ABT574AD,118 belongs to NXP's ABT-series advanced BiCMOS logic family, engineered for high-speed, low-power 5 V TTL-compatible bus interface and data latching in industrial control and embedded computing systems.
FAQ
What is the operating voltage range for the 74ABT574AD,118?
The 74ABT574AD,118 operates within a supply voltage range of 4.5 V to 5.5 V. This specification ensures compatibility with standard 5 V TTL and CMOS logic families. Operation outside this range may cause functional failure or permanent damage, as defined in the Absolute Maximum Ratings table where VCC min is −0.5 V and max is +7.0 V - but recommended conditions strictly require 4.5–5.5 V for reliable performance.
Does the 74ABT574AD,118 support live insertion into a powered system?
Yes, the 74ABT574AD,118 supports live insertion and extraction, enabled by its latch-up protection exceeding 500 mA per JESD78B Class II Level A and robust ESD ratings (HBM >2000 V, MM >200 V). These characteristics allow safe hot-plug operation in modular backplanes and field-replaceable units without system shutdown - provided proper power sequencing and current limiting are maintained per NXP application guidelines.
What is the function of Pin 1 (OE) on the 74ABT574AD,118?
Pin 1 (OE) is the active-LOW 3-state output enable input for the 74ABT574AD,118. When OE is LOW, the stored Q outputs (pins 12–19) are driven actively; when OE is HIGH, all eight outputs enter high-impedance state regardless of clock or data activity. This allows bus isolation independent of CP timing - critical for multi-master bus arbitration and power-down sequencing.
How does the 74ABT574AD,118 behave at power-up?
The 74ABT574AD,118 features power-on 3-state behavior: all Q outputs default to high-impedance upon VCC ramp-up, preventing bus contention during system initialization. This is guaranteed by internal circuitry and does not require external reset assertion. Additionally, the device incorporates power-on reset functionality to ensure predictable flip-flop states before first clock edge.
Is the 74ABT574AD,118 pin-compatible with the 74ABT374A?
No, the 74ABT574AD,118 is not pin-compatible with the 74ABT374A. While both are octal D-type flip-flops with 3-state outputs, the 74ABT574A is explicitly described as the "flow-through pinout version of 74ABT374A", meaning input and output pins are rearranged - D0–D7 and Q0–Q7 occupy opposite sides of the SO20 package to simplify PCB routing, unlike the 374A's interleaved layout. Direct substitution would require board revision.
74ABT574AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 400 MHz
- Max Propagation Delay @ V, Max CL:
- 4.7ns @ 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 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74ABT574AD,118 FAQ
1.How can I place an order for 74ABT574AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT574AD,118 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 74ABT574AD,118 reliable?
The price and inventory of 74ABT574AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT574AD,118 is usually 5 days.
3.What payment methods are accepted for 74ABT574AD,118?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT574AD,118?
74ABT574AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT574AD,118 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 74ABT574AD,118?
For technical support, including 74ABT574AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT574AD,118 requirements.
6.How does Aetrix verify that 74ABT574AD,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT574AD,118 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 74ABT574AD,118 meets industry standards.
7.What is the process for return or replacement of 74ABT574AD,118?
All 74ABT574AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT574AD,118, 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 74ABT574AD,118 part is unused and in its original packaging.
Return procedure for 74ABT574AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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