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NXP Semiconductors 74HCT374N,652
- Part No.:
- 74HCT374N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HCT374N,652.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,231
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Product details
Overview
74HCT374N,652 from NXP Semiconductors (formerly Philips) is an octal D-type positive-edge-triggered flip-flop with 3-state non-inverting outputs, 13 ns typical propagation delay at 5 V, 48 MHz maximum clock frequency, and TTL-compatible input thresholds. It serves as an 8-bit bus-oriented register in microcontroller peripheral interfaces and address/data latching circuits.
For engineers reviewing the 74HCT374N,652 datasheet, 74HCT374N,652 pinout, 74HCT374N,652 application, or 74HCT374N,652 equivalent, key selection criteria include edge-trigger timing integrity, 3-state bus drive capability, TTL-level input compatibility, and DIP-20 package suitability for through-hole prototyping and legacy industrial control systems.
Technical Context
The 74HCT374N,652 implements eight independent D-type latches synchronized to the LOW-to-HIGH transition of a shared clock (CP) input, with set-up time of 12 ns and hold time of 5 ns at VCC = 4.5 V. Its 3-state output enable (OE) operates asynchronously and does not affect internal flip-flop states.
All eight outputs (Q0–Q7) are non-inverting and share a common OE control; when OE is LOW, outputs reflect registered data; when OE is HIGH, outputs enter high-impedance OFF-state. Input capacitance is 3.5 pF, and power dissipation capacitance per flip-flop is 17 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible CMOS with 4.5–5.5 V supply and 0–3 V input high threshold |
| Propagation Delay (CP→Q) | 13 ns typical at VCC = 5 V, CL = 15 pF - ensures tight timing margin in 20 MHz+ synchronous buses |
| Max Clock Frequency | 48 MHz at VCC = 4.5 V - supports high-speed data capture in parallel I/O expansion |
| Output Drive | Bus driver capability (±6 mA sink/source at VCC = 4.5 V) - directly interfaces with standard TTL loads |
| Input Capacitance | 3.5 pF - minimizes loading on upstream logic and preserves signal edge rate |
| Power Dissipation Cap | 17 pF per flip-flop - enables accurate dynamic power estimation using PD = CPD × VCC² × fi |
Pinout & Package
74HCT374N,652 is supplied in a 20-pin plastic dual in-line package (DIP) with 0.3-inch body width and through-hole mounting. Pin 10 is GND, pin 20 is VCC, and pin 11 is the edge-triggered clock (CP) input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-LOW 3-state output enable - controls all Q0–Q7 simultaneously without affecting internal register state |
| 2,5,6,9,12,15,16,19 | Q0–Q7 | Non-inverting 3-state outputs - present registered data or high-Z based on OE; drive TTL/CMOS buses |
| 3,4,7,8,13,14,17,18 | D0–D7 | Independent data inputs - each samples its value on LOW-to-HIGH CP edge if setup/hold times met |
| 10 | GND | Ground reference - required for stable logic thresholds and noise immunity |
| 11 | CP | Clock input - edge-sensitive; only LOW-to-HIGH transitions trigger register update |
| 20 | VCC | Positive supply - nominal 5 V operation with 4.5–5.5 V tolerance; powers both logic core and output buffers |
Key Features
| Feature | Design Value |
|---|---|
| 8-bit positive-edge register | Simultaneous sampling of D0–D7 on single CP rising edge - eliminates skew between bits in parallel data capture |
| Common 3-state OE control | Single-pin bus arbitration - simplifies PCB routing and reduces control logic overhead in multi-device systems |
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max - interoperates directly with LS-TTL, ALS-TTL, and 74HCT family without level shifters |
| Independent register/buffer operation | OE toggling does not disturb stored data - enables glitch-free bus sharing during read-modify-write cycles |
Applications
| Microcontroller I/O Expansion | Address Latching in 8080/8085 Systems |
|---|---|
Use Scenario: Adding parallel GPIO ports to an 8-bit MCU with limited native I/O pins. IC Role / Device Role / Timing Role: 74HCT374N,652 acts as an output latch: MCU writes data to D0–D7, then pulses CP to store and present on Q0–Q7; OE controls bus release. Use Value: Provides deterministic 13 ns output registration and 3-state isolation - prevents bus contention during multi-peripheral transfers. | Use Scenario: Capturing 8-bit address bus segments (e.g., A0–A7) during multiplexed AD bus cycles in Intel 8080-based designs. IC Role / Device Role / Timing Role: 74HCT374N,652 serves as address latch: triggered by ALE pulse on CP, holds lower address byte while data is transferred on same bus lines. Use Value: Matches 8080 timing with 12 ns setup and 5 ns hold - ensures reliable address capture before data phase begins. |
| Industrial Control Bus Interface | Legacy Display Data Buffering |
Use Scenario: Isolating PLC CPU from noisy sensor/actuator backplanes using shared parallel control bus. IC Role / Device Role / Timing Role: 74HCT374N,652 functions as bidirectional bus buffer: OE enables/disables Q0–Q7 to decouple CPU from field wiring transients. Use Value: High-impedance OFF-state (Z) suppresses ground loop currents - improves EMC robustness in electrically harsh environments. | Use Scenario: Holding character segment data for 7-segment LED displays driven by multiplexed controllers. IC Role / Device Role / Timing Role: 74HCT374N,652 operates as static display latch: stores digit pattern until next refresh cycle, reducing controller load. Use Value: Non-inverting outputs and ±6 mA drive directly source/sink common-anode/cathode LEDs - eliminates external drivers. |
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 |
|---|---|---|---|
| SN74HCT374N | Identical logic function, pinout, and AC/DC specs; TI-manufactured with same 4.5–5.5 V range and TTL input thresholds | No functional deviation - validated drop-in replacement in existing DIP-20 layouts | Preferred for new designs requiring TI's long-term availability commitment and extended temperature screening options |
| 74HCT374D,653 | Same electrical specs but in SO-20 surface-mount package; 3.9 mm body width vs. DIP-20's 7.62 mm | Requires PCB redesign - not suitable for through-hole prototypes or legacy repair | Select when board space constraints mandate SMT or automated assembly is required |
Compared with SN74HCT374N and 74HCT374D,653, the 74HCT374N,652 offers identical timing and drive performance in a through-hole DIP package - making it optimal for lab validation, field repair, and low-volume industrial control boards where manual assembly or socketing is needed.
Availability
74HCT374N,652 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, industrial bus interfacing, and legacy system repair requiring stable component supply and long-lifecycle support.
Supply support for 74HCT374N,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 formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity, automotive, and industrial control ICs.
The 74HCT374N,652 belongs to NXP's legacy 74HCT logic family, designed specifically for TTL-to-CMOS interface bridging in industrial, instrumentation, and retro-computing applications where robustness and pin compatibility are critical.
FAQ
What is the supply voltage range for the 74HCT374N,652?
The 74HCT374N,652 operates over a supply voltage range of 4.5 V to 5.5 V. It is designed for 5 V nominal systems and maintains full TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) across this range. Operation outside this window may result in undefined logic states or excessive ICC, and the 74HCT374N,652 is not rated for 3.3 V operation.
Does the 74HCT374N,652 support asynchronous output enable?
Yes, the 74HCT374N,652 features fully asynchronous 3-state control via the OE pin: outputs transition to high impedance immediately upon OE going HIGH, regardless of clock state, and return to registered data when OE goes LOW - all without altering internal flip-flop contents. This behavior is confirmed in the functional diagram and truth table of the 74HCT374N,652 datasheet.
What is the maximum clock frequency supported by the 74HCT374N,652?
The 74HCT374N,652 supports a maximum clock frequency of 48 MHz at VCC = 4.5 V and Tamb = 25 °C with CL = 50 pF. At −40 to +85 °C, the guaranteed minimum fmax is 21 MHz. This specification is measured under defined AC test conditions and applies only when setup and hold times are strictly observed - the 74HCT374N,652 does not guarantee operation beyond these limits.
Can the 74HCT374N,652 be used with 3.3 V logic systems?
No, the 74HCT374N,652 is not designed for 3.3 V operation. Its absolute maximum VCC rating is 7 V, but its DC and AC specifications - including input thresholds, propagation delay, and output drive - are characterized only for 4.5–5.5 V. Using the 74HCT374N,652 with 3.3 V supply risks failure to recognize TTL-high inputs and violates manufacturer specifications.
Is the 74HCT374N,652 pin-compatible with the 74HC374?
Yes, the 74HCT374N,652 is pin-compatible with the 74HC374, sharing identical pin configuration, logic function, and package outline. However, the 74HCT374N,652 uses TTL-compatible input thresholds (VIH = 2.0 V min), whereas the 74HC374 requires CMOS-level inputs (VIH ≈ 3.5 V at 5 V). Interchangeability depends on driving source logic family - the 74HCT374N,652 is preferred for LS-TTL or mixed-signal interfaces.
74HCT374N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- 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:
- 44 MHz
- Max Propagation Delay @ V, Max CL:
- 32ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HCT374N,652 FAQ
1.How can I place an order for 74HCT374N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT374N,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 74HCT374N,652 reliable?
The price and inventory of 74HCT374N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT374N,652 is usually 5 days.
3.What payment methods are accepted for 74HCT374N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT374N,652 transactions.
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4.How is shipping managed for 74HCT374N,652?
74HCT374N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT374N,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 74HCT374N,652?
For technical support, including 74HCT374N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT374N,652 requirements.
6.How does Aetrix verify that 74HCT374N,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT374N,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 74HCT374N,652 meets industry standards.
7.What is the process for return or replacement of 74HCT374N,652?
All 74HCT374N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT374N,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 74HCT374N,652 part is unused and in its original packaging.
Return procedure for 74HCT374N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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