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Nexperia USA Inc. 74HCT574DB,118
- Part No.:
- 74HCT574DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT574DB,118.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,976
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Product details
Overview
74HCT574DB,118 from Nexperia is an 8-bit positive-edge-triggered D-type flip-flop with 3-state non-inverting outputs, designed for bus-oriented digital systems requiring data latching and controlled output enable. It operates at 4.5 V to 5.5 V, delivers 18 ns propagation delay (VCC = 4.5 V), supports -40 °C to +125 °C ambient range, and features TTL-compatible input thresholds. It is used in microcontroller peripheral interfacing, address/data bus buffering, and industrial control logic.
For engineers reviewing the 74HCT574DB,118 datasheet, 74HCT574DB,118 pinout, 74HCT574DB,118 application, or 74HCT574DB,118 equivalent, this device serves as a high-reliability octal register for synchronous data capture and tri-state bus management in embedded and industrial digital designs - with verified timing margins, robust ESD protection (HBM >2000 V), and JEDEC-compliant operation.
Technical Context
The 74HCT574DB,118 implements eight independent D-type flip-flops sharing a common clock (CP) and active-low output enable (OE). Each flip-flop captures Dn input on the LOW-to-HIGH CP transition, meeting 12 ns setup and 5 ns hold time at VCC = 4.5 V. The 3-state outputs are fully decoupled from flip-flop state during OE HIGH, enabling clean bus arbitration without affecting internal storage.
Its TTL-level inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V) ensure direct compatibility with legacy 5 V logic families, while CMOS output drive (VOH ≥ 3.98 V, VOL ≤ 0.26 V at IO = ±6 mA) maintains noise margin and fan-out capability. Input clamping diodes allow safe interfacing to voltages exceeding VCC when current-limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input levels, CMOS output drive |
| Supply Voltage Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V rail tolerances |
| Propagation Delay (tpd) | 18 ns (max) at VCC = 4.5 V - Enables reliable 24 MHz operation in synchronous buses |
| Output Enable Time (ten) | 33 ns (max) at VCC = 4.5 V - Supports fast bus turnaround in multiplexed data paths |
| Operating Temperature | -40 °C to +125 °C - Qualified for extended industrial and under-hood applications |
| ESD Protection | HBM >2000 V, CDM >1000 V - Meets ANSI/ESDA/JEDEC JS-001 Class 2 and JS-002 Class C3 |
| Input Clamp Diodes | Integrated - Allows safe interface to signals up to VCC + 0.5 V with external current limiting |
Pinout & Package
74HCT574DB,118 is packaged in SSOP20 (SOT339-1), a 20-lead plastic shrink small outline package with 0.65 mm lead pitch and 7.2 mm body width - optimized for high-density PCB layouts while maintaining hand-solderability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Drives all Q outputs to high-impedance when HIGH; no effect on internal flip-flop states |
| 2–9 (D0–D7) | Data inputs | Sampled on LOW-to-HIGH CP edge; TTL-compatible thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) |
| 10 (GND) | Ground reference | 0 V return path for logic and power; required for valid voltage referencing |
| 11 (CP) | Clock input | Positive-edge-triggered; requires 12 ns minimum setup and 5 ns hold time for Dn inputs |
| 12–19 (Q0–Q7) | 3-state non-inverting outputs | Reflect Dn state when OE = LOW; high-Z when OE = HIGH; drive ±6 mA |
| 20 (VCC) | Supply voltage | 4.5 V to 5.5 V nominal; powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V - eliminates level-shifting in mixed-logic systems |
| 8-bit synchronized latch | Single CP edge captures all 8 D inputs simultaneously - ensures coherent bus data sampling |
| Common 3-state control | Single OE pin disables all outputs without disturbing stored data - simplifies bus arbitration logic |
| Wide temperature range | -40 °C to +125 °C operation - validated for industrial automation and motor control environments |
| Low dynamic power | CPD = 25 pF - reduces switching power dissipation in high-frequency bus applications |
Applications
| Microcontroller Bus Interface | Industrial I/O Expansion |
|---|---|
Use Scenario: Interfacing an 8-bit microcontroller data bus to parallel peripherals (e.g., ADCs, DACs, displays). IC Role / Device Role / Timing Role: Latches address/data during bus cycles and isolates peripherals via 3-state outputs during CPU access. Use Value: Prevents bus contention and enables deterministic timing with 18 ns tpd and 33 ns ten - critical for cycle-accurate peripheral control. |
Use Scenario: Adding parallel digital I/O to PLC modules or programmable logic controllers. IC Role / Device Role / Timing Role: Buffers and holds control signals (e.g., relay drivers, sensor readouts) under real-time scan-cycle timing. Use Value: -40 °C to +125 °C rating and latch-up immunity (>100 mA) ensure reliability in harsh factory-floor environments. |
| Memory Address Latching | Digital Test Equipment Logic |
Use Scenario: Capturing upper/lower address bytes in 16-bit memory-mapped systems (e.g., SRAM, EPROM interfaces). IC Role / Device Role / Timing Role: Synchronizes address strobes to system clock, holding stable addresses during memory access windows. Use Value: 12 ns setup/5 ns hold time guarantees setup compliance even with marginal board trace skew. |
Use Scenario: Signal conditioning and pattern generation in automated test equipment (ATE) digital channels. IC Role / Device Role / Timing Role: Registers stimulus patterns and gates responses onto shared test buses using precise edge-triggered timing. Use Value: HBM >2000 V ESD rating protects against handling damage during lab reconfiguration and probe contact. |
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 |
|---|---|---|---|
| 74HCT574PW,118 | TSSOP20 package (SOT360-1); 0.65 mm pitch, 4.4 mm body width | Higher density layout; lower thermal resistance than SSOP | Select for space-constrained PCBs where thermal performance is prioritized over manual assembly |
| SN74HCT574N | DIP-20 package; through-hole mounting; wider 600 mil body | Prototyping-friendly; no reflow requirements; higher parasitic inductance | Select for breadboard evaluation, educational use, or legacy through-hole production lines |
Compared with 74HCT574PW,118, the 74HCT574DB,118 offers identical electrical specs but in SSOP20 - balancing compactness and solderability. Versus SN74HCT574N, it provides superior high-frequency signal integrity and thermal performance, though requiring surface-mount assembly capability.
Availability
74HCT574DB,118 is available at Aetrix Electronics and suitable for industrial control systems, microcontroller peripheral interfacing, and digital test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT574DB,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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and discrete components with focus on efficiency, reliability, and scalability for industrial, automotive, and consumer applications.
The 74HCT574DB,118 belongs to Nexperia's 74HCT logic family - engineered for seamless integration with legacy TTL systems while leveraging CMOS power efficiency and noise immunity in demanding embedded environments.
FAQ
What is the maximum clock frequency supported by the 74HCT574DB,118?
The 74HCT574DB,118 supports a maximum clock frequency of 24 MHz at VCC = 4.5 V and -40 °C to +85 °C ambient, based on its 30 ns maximum propagation delay and 16 ns minimum pulse width. At full -40 °C to +125 °C range, fmax is derated to 20 MHz per datasheet Table 7 specifications.
Can the 74HCT574DB,118 be used with a 3.3 V supply?
No - the 74HCT574DB,118 is specified only for 4.5 V to 5.5 V operation per Table 5. Its TTL-compatible inputs require VIH ≥ 2.0 V, but VCC < 4.5 V violates recommended operating conditions and risks undefined output behavior, reduced noise margin, and non-compliance with JEDEC JESD7A.
How does the output enable (OE) pin interact with the internal flip-flop state?
The OE pin has no effect on internal flip-flop states: when OE is HIGH, outputs go high-impedance while stored Q values remain unchanged. When OE returns LOW, previously latched data appears immediately on Q0–Q7 without retriggering - enabling glitch-free bus re-engagement.
Is the 74HCT574DB,118 pin-compatible with the 74HC574DB variant?
Yes - both share identical pinout, package (SSOP20/SOT339-1), and functional diagram. However, 74HC574DB uses CMOS input thresholds (VIH = 3.15 V min at VCC = 4.5 V), making it incompatible with TTL-level drivers, whereas 74HCT574DB's TTL inputs ensure direct drop-in replacement in 5 V TTL systems.
74HCT574DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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:
- 76 MHz
- Max Propagation Delay @ V, Max CL:
- 33ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74HCT574DB,118 FAQ
1.How can I place an order for 74HCT574DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT574DB,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 74HCT574DB,118 reliable?
The price and inventory of 74HCT574DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT574DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT574DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT574DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT574DB,118?
74HCT574DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT574DB,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 74HCT574DB,118?
For technical support, including 74HCT574DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT574DB,118 requirements.
6.How does Aetrix verify that 74HCT574DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT574DB,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 74HCT574DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT574DB,118?
All 74HCT574DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT574DB,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 74HCT574DB,118 part is unused and in its original packaging.
Return procedure for 74HCT574DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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