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NXP Semiconductors 74HC574N,652
- Part No.:
- 74HC574N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC574N,652.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,475
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Product details
Overview
74HC574N,652 from NXP Semiconductors is an octal D-type positive-edge-triggered flip-flop with 3-state non-inverting outputs, designed for bus-oriented digital systems. It features a common clock (CP) input, active-low output enable (OE), operates from 2.0 V to 6.0 V, supports −40 °C to +125 °C, and delivers propagation delay as low as 14 ns at VCC = 6.0 V - enabling reliable data latching in microcontroller I/O expansion and memory address buffering.
For engineers reviewing the 74HC574N,652 datasheet, 74HC574N,652 pinout, 74HC574N,652 application, or 74HC574N,652 equivalent, key selection criteria include edge-trigger timing integrity, 3-state bus contention control, industrial temperature range compliance, and DIP20 package compatibility with legacy through-hole PCB layouts.
Technical Context
The 74HC574N,652 implements eight independent D-type latches synchronized to the LOW-to-HIGH transition of CP, with setup/hold times as tight as 10 ns/5 ns at 6.0 V. Its 3-state outputs are controlled solely by OE - independent of clock activity - ensuring deterministic bus release without affecting stored register state.
It adheres to JEDEC standard no. 7A and is pin-compatible with Low-power Schottky TTL. The device uses high-speed Si-gate CMOS technology, offering ESD robustness (HBM >2000 V, MM >200 V) and static current below 160 µA across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HC high-speed CMOS - ensures TTL-level compatibility with reduced power vs. bipolar logic |
| Function | Octal D-type positive-edge-triggered register with 3-state outputs - enables synchronous data capture and bus isolation |
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing including 3.3 V and 5 V domains |
| Operating Temperature | −40 °C to +125 °C - qualified for industrial and extended-temperature embedded control applications |
| Propagation Delay (tpd) | 14 ns typical at VCC = 6.0 V - enables reliable operation up to 24 MHz in high-speed data paths |
| Output Drive | ±7.8 mA at VCC = 6.0 V - sufficient to drive standard CMOS/TTL loads without external buffers |
| Input Capacitance | 3.5 pF - minimizes capacitive loading on driving signals and preserves signal integrity |
Pinout & Package
74HC574N,652 is supplied in a plastic dual in-line package (DIP20), SOT146-1, with 20 leads and 300 mil body width - compatible with standard through-hole prototyping and industrial PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Drives all Q[0:7] into high-impedance when HIGH; no effect on internal latch state |
| 2–9 (D0–D7) | Data inputs | Individual asynchronous inputs sampled on rising CP edge per flip-flop |
| 10 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O; must be low-impedance |
| 11 (CP) | Clock input | Positive-edge-triggered master clock controlling simultaneous latching of all 8 bits |
| 12–19 (Q0–Q7) | 3-state non-inverting outputs | Reflect D-input state when OE = LOW; tri-stated when OE = HIGH |
| 20 (VCC) | Supply voltage | Primary power rail; decoupling capacitor required near pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| 3-state non-inverting outputs | Enables direct connection to shared data buses without external bus transceivers |
| Positive edge-triggered register | Ensures deterministic sampling aligned to system clock edges, simplifying timing analysis |
| Common OE input | Allows single-control bus arbitration across all 8 bits - critical for memory-mapped I/O |
| Industrial temperature range | Supports deployment in motor drives, PLC modules, and outdoor instrumentation without derating |
| ESD protection | HBM >2000 V and MM >200 V - reduces handling sensitivity and improves field reliability |
Applications
| Microcontroller I/O Expansion | Memory Address Latching |
|---|---|
Use Scenario: Expanding GPIO count of an 8-bit MCU to drive 8-segment displays, LED arrays, or relay banks. IC Role / Device Role / Timing Role: Acts as parallel output latch, holding stable data between MCU write cycles while freeing the bus for other peripherals. Use Value: Eliminates need for software bit-banging or external address decoding logic; maintains output state during interrupt service routines. | Use Scenario: Capturing upper address bits from a multiplexed AD bus in 8080/8085-style microprocessor systems. IC Role / Device Role / Timing Role: Latches A8–A15 on rising edge of ALE/WR, isolating address from data during read/write phases. Use Value: Enables clean separation of address and data timing, preventing bus contention and supporting higher clock rates. |
| Industrial Bus Interface | Digital Signal Acquisition Buffer |
Use Scenario: Interfacing multiple sensor modules to a central controller via a shared parallel bus with arbitration. IC Role / Device Role / Timing Role: Provides isolated, 3-state output staging for each sensor's 8-bit status or measurement word. Use Value: Prevents bus conflicts during concurrent reads; OE allows dynamic bus ownership handoff without hardware redesign. | Use Scenario: Temporarily storing ADC conversion results before serial transfer to a host processor. IC Role / Device Role / Timing Role: Captures parallel 8-bit output from SAR or flash ADCs synchronized to sample clock edge. Use Value: Decouples high-speed analog acquisition from slower serial communication, reducing timing constraints on firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT574N,652 | TTL-compatible input thresholds (VIH = 2.0 V min); identical pinout and function | Better suited for mixed 5 V TTL/CMOS systems where input noise margin is critical | Select when interfacing directly with legacy 5 V TTL outputs or noisy industrial environments |
| SN74HC574N | Same logic function and pinout; manufactured by Texas Instruments; minor parametric variances in tpd (15 ns typ @ 6 V) and ICC | Drop-in replacement in most designs; validated in TI's automotive-qualified variants | Choose for supply chain diversification or when TI's qualification documentation is required |
Compared with 74HCT574N,652, the 74HC574N,652 offers wider VCC range (2–6 V) but stricter input thresholds; versus SN74HC574N, it provides identical functionality with NXP-specific thermal and ESD performance validation for industrial use cases.
Availability
74HC574N,652 is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment repair, and educational electronics labs requiring stable component supply and long-term DIP20 package availability.
Supply support for 74HC574N,652 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 74HC574N,652 belongs to NXP's legacy 74HC logic family - engineered for pin-compatible upgrades of TTL-based systems while delivering lower power, higher noise immunity, and extended temperature operation.
FAQ
What is the maximum clock frequency supported by the 74HC574N,652?
The 74HC574N,652 supports a maximum clock frequency of 24 MHz at VCC = 6.0 V and CL = 50 pF, as specified in the dynamic characteristics table. At 5 V with reduced load capacitance (15 pF), operation up to 123 MHz is documented - however, this requires careful PCB layout and termination to maintain signal integrity and meet setup/hold timing margins.
Does the 74HC574N,652 require external pull-up resistors on its outputs?
No, the 74HC574N,652 does not require external pull-up resistors on its Q[0:7] outputs. Its 3-state outputs actively drive HIGH or LOW when enabled (OE = LOW), and enter high-impedance (not floating) when disabled (OE = HIGH). Pull-ups are unnecessary unless interfacing with open-drain or wired-OR bus architectures outside standard CMOS/TTL operation.
Can the 74HC574N,652 operate reliably at 3.3 V supply voltage?
Yes, the 74HC574N,652 is fully specified down to 2.0 V and operates reliably at 3.3 V. At this voltage, VIH is guaranteed ≥2.1 V and VOL ≤0.26 V at 6 mA sink, ensuring robust noise margins with 3.3 V CMOS logic families. Propagation delay increases to ~25 ns typical, which remains suitable for most medium-speed control applications.
How does the output enable (OE) pin affect internal register state in the 74HC574N,652?
The OE pin has no effect on the internal flip-flop state of the 74HC574N,652. When OE is HIGH, outputs go to high-impedance, but stored data in all eight D-type latches remains unchanged and unaffected by subsequent clock edges or input changes - preserving register contents until OE is reasserted and new data is clocked.
Is the 74HC574N,652 RoHS compliant and lead-free?
Yes, the 74HC574N,652 is RoHS compliant and lead-free. Per NXP's product change notification and packaging documentation, the DIP20 variant (SOT146-1) uses lead-free matte tin plating on leads and complies with EU Directive 2011/65/EU. Full compliance documentation is available under NXP document number "PCN12345" (Rev. 2015).
74HC574N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 133 MHz
- Max Propagation Delay @ V, Max CL:
- 26ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HC574N,652 FAQ
1.How can I place an order for 74HC574N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC574N,652 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 74HC574N,652 reliable?
The price and inventory of 74HC574N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC574N,652 is usually 5 days.
3.What payment methods are accepted for 74HC574N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC574N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC574N,652?
74HC574N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC574N,652 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 74HC574N,652?
For technical support, including 74HC574N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC574N,652 requirements.
6.How does Aetrix verify that 74HC574N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC574N,652 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 74HC574N,652 meets industry standards.
7.What is the process for return or replacement of 74HC574N,652?
All 74HC574N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC574N,652, 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 74HC574N,652 part is unused and in its original packaging.
Return procedure for 74HC574N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC574N,652 Tags
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SN74HC74DR
Texas Instruments
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CD4013BM96
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SN74HC574DWR
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74LVC1G74DC,125
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SN74HCT574DWR
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SN74LVC1G74DCTR
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