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Nexperia USA Inc. 74AHCT574PW,118
- Part No.:
- 74AHCT574PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT574PW,118.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:660
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Product details
Overview
74AHCT574PW,118 from Nexperia is an octal positive-edge-triggered D-type flip-flop with 3-state non-inverting outputs, designed for bus-oriented data latching in 5 V TTL-compatible systems. It operates from 4.5 V to 5.5 V, features 3 ns minimum clock pulse width, 3.0 ns setup time, and 1.5 ns hold time at VCC = 5 V, and supports industrial temperature range (−40 °C to +125 °C) in TSSOP20 package.
For engineers reviewing the 74AHCT574PW,118 datasheet, 74AHCT574PW,118 pinout, 74AHCT574PW,118 application, or 74AHCT574PW,118 equivalent, this device serves as a high-speed, low-power 8-bit register for microcontroller peripheral interfacing, address/data bus isolation, and synchronous data capture where TTL-level compatibility and 3-state bus control are required.
Technical Context
The 74AHCT574PW,118 implements eight independent D-type latches triggered on the LOW-to-HIGH clock transition, with separate 3-state output enable (active LOW) that does not affect internal state retention. Its TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max) ensure seamless integration with legacy 5 V logic families.
Propagation delay is specified at 4.4 ns (typ) to 11.0 ns (max) from CP to Qn under 5 V/50 pF load, and enable/disable times are tightly controlled (10.5–14.0 ns max), enabling reliable timing in high-density digital systems with strict setup/hold margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AHCT - TTL-compatible CMOS, ensuring interoperability with standard 5 V TTL drivers and receivers |
| Supply Voltage Range | 4.5 V to 5.5 V - guarantees stable operation across industrial 5 V rail tolerances (±10 %) |
| Max Clock Frequency | 115 MHz (typ) at 5 V/50 pF - supports high-throughput data sampling in fast parallel interfaces |
| Propagation Delay (tpd) | 4.4–13.5 ns - enables sub-10 ns timing closure in compact synchronous designs |
| Input Setup/Hold Time | tsu = 3.0 ns, th = 1.5 ns at 5 V - defines minimum data stability window before/after clock edge for reliable capture |
| 3-State Enable Time (ten) | 6.1–14.0 ns - ensures predictable bus release timing during multiplexer or shared-bus arbitration |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood, industrial control, and extended-environment applications |
Pinout & Package
TSSOP20 (SOT360-1) package: 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable input | Active LOW control - asserts high-impedance outputs without altering stored latch states |
| 2–9 (D0–D7) | Data inputs | Asynchronous parallel data inputs synchronized to rising CP edge; TTL-level compatible |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and I/O; decoupling capacitor placement critical for noise immunity |
| 11 (CP) | Clock input | LOW-to-HIGH edge-triggered - defines precise sampling instant for all eight D inputs simultaneously |
| 12–19 (Q7–Q0) | 3-state non-inverting outputs | Register outputs mirrored from D inputs on CP edge; tri-stated when OE = HIGH |
| 20 (VCC) | Supply voltage | +5 V nominal power rail; requires local 100 nF ceramic decoupling adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max - eliminates level-shifting when interfacing with legacy 5 V microcontrollers and FPGAs |
| Overvoltage tolerant inputs | Withstands up to 5.5 V regardless of VCC - prevents damage during hot-swap or mixed-voltage board bring-up |
| Low dynamic power dissipation | CPD = 12 pF - reduces switching current and heat generation in high-frequency bus applications |
| High noise immunity | Input Schmitt-trigger action - suppresses glitches on noisy control lines like OE or CP in electrically harsh environments |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level A - ensures robustness against transient current surges in industrial settings |
Applications
| Microcontroller Peripheral Interface | Parallel Bus Isolation |
|---|---|
Use Scenario: Interfacing an 8-bit microcontroller data bus to external memory or I/O peripherals with timing-critical strobes. IC Role / Device Role / Timing Role: Acts as a transparent, edge-triggered data latch synchronizing asynchronous peripheral reads/writes to the MCU clock domain. Use Value: Enables deterministic 8-bit data capture with 3.0 ns setup margin at 5 V, eliminating metastability in shared-bus handshaking. | Use Scenario: Isolating two independent 8-bit data buses (e.g., CPU and DMA controller) sharing a common memory subsystem. IC Role / Device Role / Timing Role: Provides bidirectional bus buffering via 3-state outputs controlled by separate OE signals per side. Use Value: Prevents bus contention with <14 ns enable/disable transitions, supporting concurrent access arbitration without signal corruption. |
| Industrial PLC I/O Expansion | Digital Signal Acquisition |
Use Scenario: Capturing parallel sensor data (e.g., 8-channel ADC outputs) in programmable logic controllers operating in extended temperature environments. IC Role / Device Role / Timing Role: Serves as a synchronized input register holding sampled values until polled by the main controller. Use Value: −40 °C to +125 °C rating and 1.5 ns hold time ensure reliable operation in uncontrolled cabinet environments with thermal cycling. | Use Scenario: Latching real-time digital waveform samples from high-speed comparators or encoder interfaces before serial transmission. IC Role / Device Role / Timing Role: Functions as a high-speed acquisition buffer, capturing 8-bit snapshots on each system clock edge. Use Value: 115 MHz max clock frequency and 4.4 ns propagation delay support >10 MSPS effective sampling rates in pipelined architectures. |
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 |
|---|---|---|---|
| 74AHC574PW,118 | CMOS input thresholds (VIH = 3.85 V @ 5.5 V); wider supply range (2.0–5.5 V) | Suitable for mixed-voltage 3.3 V/5 V systems requiring level translation | Select when interfacing with 3.3 V logic or operating below 4.5 V |
| SN74LV574APWRE4 | Lower VCC range (2.0–5.5 V); LV logic family; higher drive strength (16 mA) | Better noise margin in noisy industrial environments; supports longer trace lengths | Prefer for high-noise applications or when driving >15 pF loads |
Compared with 74AHC574PW,118 and SN74LV574APWRE4, the 74AHCT574PW,118 uniquely balances TTL compatibility, tight timing (3.0 ns tsu), and industrial temperature resilience-making it optimal for legacy 5 V control systems where input threshold matching and timing predictability are critical.
Availability
74AHCT574PW,118 is available at Aetrix Electronics and suitable for microcontroller peripheral interface, parallel bus isolation, and industrial PLC I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT574PW,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, reliable logic, analog, and discrete components optimized for efficiency and miniaturization in mass-market electronics.
The 74AHCT series targets industrial and consumer applications requiring TTL-compatible 5 V logic with low power, high noise immunity, and robust ESD protection-designed specifically for bus-oriented digital systems demanding precise timing and bus contention avoidance.
FAQ
What is the maximum clock frequency supported by the 74AHCT574PW,118?
The 74AHCT574PW,118 supports a maximum clock frequency of 115 MHz (typical) at VCC = 5.0 V with CL = 50 pF, and 75 MHz (minimum) over the full −40 °C to +125 °C operating range. This is derived from the 5.0 ns minimum clock pulse width and 13.5 ns maximum propagation delay under worst-case conditions.
Can the 74AHCT574PW,118 operate with a 3.3 V supply?
No - the 74AHCT574PW,118 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds (VIH = 2.0 V min) and internal design require ≥4.5 V for guaranteed logic-level recognition and output drive compliance. For 3.3 V systems, use the 74AHC574PW,118 variant instead.
How does the 3-state output enable (OE) interact with the internal flip-flop state?
The OE input is purely output-directed: asserting OE = HIGH places Q0–Q7 into high-impedance mode without affecting the stored logic states of the eight internal D flip-flops. The latched data remains intact and immediately reappears on the outputs when OE returns LOW, enabling glitch-free bus sharing.
Is the 74AHCT574PW,118 pin-compatible with other 74-series octal latches in TSSOP20?
Yes - the 74AHCT574PW,118 shares identical pinout (SOT360-1) and terminal numbering with industry-standard 74xx574 variants including 74AHC574PW,118 and 74LV574APWRE4. Power (VCC, GND), clock (CP), output enable (OE), and I/O (D0–D7, Q0–Q7) positions match exactly, enabling direct PCB footprint reuse.
74AHCT574PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 115 MHz
- Max Propagation Delay @ V, Max CL:
- 10.6ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AHCT574PW,118 FAQ
1.How can I place an order for 74AHCT574PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT574PW,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 74AHCT574PW,118 reliable?
The price and inventory of 74AHCT574PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT574PW,118 is usually 5 days.
3.What payment methods are accepted for 74AHCT574PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT574PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT574PW,118?
74AHCT574PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT574PW,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 74AHCT574PW,118?
For technical support, including 74AHCT574PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT574PW,118 requirements.
6.How does Aetrix verify that 74AHCT574PW,118 is sourced from the original manufacturer or authorized distributors?
All 74AHCT574PW,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 74AHCT574PW,118 meets industry standards.
7.What is the process for return or replacement of 74AHCT574PW,118?
All 74AHCT574PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT574PW,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 74AHCT574PW,118 part is unused and in its original packaging.
Return procedure for 74AHCT574PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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