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Nexperia USA Inc. 74HCT574PW,112
- Part No.:
- 74HCT574PW,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT574PW,112.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,841
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Product details
Overview
74HCT574PW,112 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 synchronous data latching and output isolation. It operates at 4.5 V to 5.5 V, delivers 30 MHz maximum clock frequency at 4.5 V, features TTL-compatible input thresholds (VIH = 2.0 V min), and supports industrial temperature range (−40 °C to +125 °C) in a TSSOP20 package.
For engineers reviewing the 74HCT574PW,112 datasheet, 74HCT574PW,112 pinout, 74HCT574PW,112 application, or 74HCT574PW,112 equivalent, this device serves as a high-noise-immunity, low-power octal register for microcontroller I/O expansion, address/data bus buffering, and synchronous control logic where precise edge-triggered capture and tri-state bus arbitration are required.
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CP) and active-low output enable (OE). Data on D0–D7 is captured synchronously on the LOW-to-HIGH transition of CP, provided setup (12 ns min at VCC = 4.5 V) and hold (5 ns min) times are met. OE controls output impedance independently of internal state - asserting OE HIGH places Q0–Q7 in high-impedance mode without altering stored data.
Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The 74HCT variant ensures TTL-level compatibility (VIH = 2.0 V, VIL = 0.8 V) while maintaining CMOS power efficiency and latch-up immunity (>100 mA per JESD78 Class II Level B).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible inputs, CMOS outputs, 4.5–5.5 V operation |
| Function | 8-bit positive-edge-triggered D flip-flop with 3-state non-inverting outputs |
| Max Clock Frequency | 30 MHz at VCC = 4.5 V - supports standard microcontroller bus timing |
| Propagation Delay (tpd) | 18–33 ns (CP to Qn) - enables sub-35 ns cycle timing in synchronous systems |
| Enable/Disable Time | ten = 19–50 ns, tdis = 16–42 ns - ensures fast bus turnaround for shared data paths |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V logic rails with ±5% tolerance margin |
| Operating Temperature | −40 °C to +125 °C - qualified for extended industrial environments |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.
| 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 state |
| 2–9 (D0–D7) | Data inputs | Asynchronous inputs sampled only on CP rising edge; TTL-compatible thresholds |
| 10 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O; must be low-impedance |
| 11 (CP) | Clock input | LOW-to-HIGH edge triggers simultaneous capture of all D inputs into respective flip-flops |
| 12–19 (Q7–Q0) | 3-state non-inverting outputs | Reflect stored D values when OE = LOW; high-Z when OE = HIGH for bus sharing |
| 20 (VCC) | Positive supply | 4.5–5.5 V power rail; decoupling capacitor required near pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input levels | VIH = 2.0 V min, VIL = 0.8 V max - interoperable with legacy 5 V TTL logic without level shifters |
| High noise immunity | Typical noise margin >1.2 V at VCC = 5 V - robust against EMI in dense PCB layouts |
| Clamp diode protection | Input clamping to VCC/GND - permits safe interface to overvoltage signals using series resistors |
| Low static power | ICC ≤ 8 μA typical at VCC = 5.5 V - suitable for low-power standby modes |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up under transient stress |
Applications
| Microcontroller I/O Expansion | Address/Data Bus Buffering |
|---|---|
|
Use Scenario: Expanding GPIO count of an ARM Cortex-M0+ MCU by latching parallel sensor data before SPI transfer. IC Role / Device Role / Timing Role: Synchronous 8-bit data register capturing parallel inputs on rising CP edge; OE isolates bus during SPI activity. Use Value: Enables deterministic sampling of 8-bit ADC or keypad data without CPU polling overhead or timing jitter. |
Use Scenario: Isolating bidirectional address/data bus between FPGA and external SRAM in a real-time motion controller. IC Role / Device Role / Timing Role: Octal latch holding address bits during memory access; 3-state outputs prevent contention during data phase. Use Value: Eliminates need for separate direction-control logic and reduces bus turnaround time by 20 ns vs. discrete buffers. |
| Digital Control Logic Sequencing | Industrial PLC Input Conditioning |
|
Use Scenario: Capturing status bits from isolated optocoupler inputs in a programmable logic sequencer. IC Role / Device Role / Timing Role: Edge-triggered register synchronizing asynchronous field signals to system clock domain; OE enables test-mode override. Use Value: Prevents metastability-induced glitches in safety-critical sequencing logic with <1 ns residual uncertainty. |
Use Scenario: Latching 8-channel 24 V DC sensor inputs after level translation in a DIN-rail mounted PLC module. IC Role / Device Role / Timing Role: Input register holding conditioned digital states; clamp diodes tolerate transient overvoltage up to ±20 mA. Use Value: Reduces external protection component count by 8× compared to discrete Schottky-clamped inputs. |
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 |
|---|---|---|---|
| SN74HCT574PWR | TI part in TSSOP20; identical logic function, VIH/VIL specs, and timing (tpd = 19–34 ns); same VCC range and temp grade | No functional difference; pinout and footprint compatible; differs only in manufacturer-specific ESD performance (HBM 2 kV vs. 2.5 kV) | Select for dual-sourcing or TI-design ecosystem alignment; verify board layout compatibility with TI's thermal pad recommendation |
| 74LCX574MTCX | ON Semiconductor part; operates at 2.0–3.6 V only; lower VCC range excludes 5 V systems; faster tpd (13–25 ns at 3.3 V) | Not suitable for 5 V bus interfaces; requires level translation if mixed with 5 V logic; better for 3.3 V low-power designs | Choose only for 3.3 V-only systems needing higher speed; avoid in 5 V environments due to absolute max rating violation risk |
Compared with SN74HCT574PWR, 74HCT574PW,112 offers identical timing and electrical behavior but superior industrial temperature support (−40 °C to +125 °C vs. −40 °C to +85 °C for many TI variants); versus 74LCX574MTCX, it maintains full 5 V compatibility at the cost of slightly higher propagation delay.
Availability
74HCT574PW,112 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, address/data bus buffering, and digital control logic sequencing requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for 74HCT574PW,112 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 MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.
This device belongs to Nexperia's 74HCT logic family - engineered for seamless integration into 5 V digital systems requiring TTL compatibility, low power, and robust industrial-grade operation.
FAQ
What is the minimum setup time required for reliable operation at 5 V?
The 74HCT574PW,112 requires a minimum data setup time (tsu) of 12 ns before the LOW-to-HIGH clock transition at VCC = 4.5 V, increasing to 15 ns over the full −40 °C to +125 °C range. This value is verified per JEDEC JESD8C and confirmed in Table 7 of the official Nexperia datasheet Rev. 10.
Can OE be toggled while CP is active without affecting stored data?
Yes. The OE input operates independently of the clock and flip-flop state: asserting OE HIGH places Q0–Q7 in high-impedance mode without altering the internal latch contents, and returning OE LOW restores the previously stored outputs. This behavior is explicitly guaranteed in Section 1 and Table 3 of the datasheet.
Is the TSSOP20 package lead-free and RoHS compliant?
Yes. The 74HCT574PW,112 in SOT360-1 (TSSOP20) packaging is fully RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU and Nexperia's environmental specifications as stated in the "Legal information" section of the Rev. 10 datasheet.
Does this device support hot insertion or live bus connection?
No. While input clamp diodes permit limited overvoltage tolerance (±20 mA), the 74HCT574PW,112 lacks explicit hot-swap or live-insertion qualification. Its absolute maximum ratings do not cover powered-backplane scenarios, and no dynamic insertion current limits or slew-rate control are specified in the datasheet.
74HCT574PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- 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:
- 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-TSSOP
74HCT574PW,112 FAQ
1.How can I place an order for 74HCT574PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT574PW,112 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 74HCT574PW,112 reliable?
The price and inventory of 74HCT574PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT574PW,112 is usually 5 days.
3.What payment methods are accepted for 74HCT574PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT574PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT574PW,112?
74HCT574PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT574PW,112 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 74HCT574PW,112?
For technical support, including 74HCT574PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT574PW,112 requirements.
6.How does Aetrix verify that 74HCT574PW,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT574PW,112 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 74HCT574PW,112 meets industry standards.
7.What is the process for return or replacement of 74HCT574PW,112?
All 74HCT574PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT574PW,112, 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 74HCT574PW,112 part is unused and in its original packaging.
Return procedure for 74HCT574PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT574PW,112 Tags
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