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NXP Semiconductors 74HC374N,652
- Part No.:
- 74HC374N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC374N,652.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,948
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Product details
Overview
74HC374N,652 from Nexperia is an octal D-type positive-edge-triggered flip-flop with 3-state non-inverting outputs, designed for bus-oriented digital systems. It operates at VCC = 2.0–6.0 V, delivers tPHL/tPLH ≤ 41 ns (at VCC = 6.0 V, CL = 50 pF), supports fmax up to 83 MHz (VCC = 6.0 V), and features independent register and output buffer control via separate CP and OE inputs. It is used in address/data latching in microprocessor peripheral interfaces.
For engineers reviewing the 74HC374N,652 datasheet, 74HC374N,652 pinout, 74HC374N,652 application, or 74HC374N,652 equivalent, key selection criteria include propagation delay consistency across all eight channels, guaranteed 3-state output isolation during OE HIGH, edge-triggered setup/hold timing compliance (tsu = 15 ns, th = 5 ns at VCC = 6.0 V), and compatibility with 5 V TTL-level control signals in mixed-logic systems.
Technical Context
The 74HC374N,652 implements eight independent D-type latches synchronized to the LOW-to-HIGH transition of a common clock (CP) input. Each channel accepts a dedicated Dn input and drives a corresponding Qn output with non-inverting logic polarity.
Its 3-state output enable (OE) operates asynchronously: when OE = LOW, Q0–Q7 reflect registered data; when OE = HIGH, all outputs enter high-impedance OFF-state without affecting internal flip-flop states. This enables bidirectional bus sharing without contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 6.0 V - supports dual-supply legacy systems and 3.3 V/5 V mixed-voltage board designs |
| tPHL / tPLH | ≤ 41 ns at VCC = 6.0 V, CL = 50 pF - ensures deterministic timing margin for 20+ MHz synchronous buses |
| fmax | 83 MHz at VCC = 6.0 V - enables use as a high-speed latch in video timing controllers and FIFO interfaces |
| tsu / th | 15 ns / 5 ns at VCC = 6.0 V - defines minimum D-input stability window before/after CP edge for reliable capture |
| tPZH / tPZL | ≤ 38 ns at VCC = 6.0 V - guarantees fast bus release (<40 ns) when enabling shared data paths |
| CI | 3.5 pF - low input capacitance minimizes loading on driving gate outputs and preserves signal integrity |
Pinout & Package
74HC374N,652 is supplied in a 20-pin dual in-line package (DIP) with through-hole mounting, compliant with JEDEC MS-001 and Nexperia's standard plastic DIP outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable input | Active-LOW control: asserts Q0–Q7 drive when LOW; places all outputs in high-Z when HIGH |
| 2,5,6,9,12,15,16,19 (Q0–Q7) | Non-inverting registered outputs | Reflect stored Dn values only when OE = LOW; otherwise present >100 kΩ impedance |
| 3,4,7,8,13,14,17,18 (D0–D7) | Data inputs | Independent asynchronous inputs sampled on LOW-to-HIGH CP edge; no internal latching without clock |
| 10 (GND) | Ground reference | Primary 0 V return path for logic and output current; must be low-inductance connection |
| 11 (CP) | Clock input | Edge-sensitive trigger: only LOW-to-HIGH transitions load Dn into respective flip-flops |
| 20 (VCC) | Positive supply | Single power rail for both logic core and output buffers; decoupling required within 10 mm |
Key Features
| Feature | Design Value |
|---|---|
| Octal D-type register with edge-triggered capture | Enables simultaneous latching of 8-bit parallel data (e.g., address or status bus) on one clock edge |
| Common 3-state output enable (OE) | Allows single-control arbitration of shared data buses without external logic or timing skew |
| Non-inverting output polarity | Preserves signal logic sense from Dn to Qn, simplifying PCB routing and reducing inversion logic overhead |
| Bus-driver output capability | Drives standard TTL loads (IOH/IOL ≥ ±4 mA at VCC = 4.5 V) directly-no external buffers needed |
Applications
| Microprocessor Address Latching | Industrial I/O Expansion |
|---|---|
Use Scenario: Holding 8-bit address segments during multiplexed bus cycles in 80C51 or Z80-based controllers. IC Role / Device Role / Timing Role: Synchronous address register that captures and holds A0–A7 on CPU ALE or WR edge. Use Value: Eliminates need for discrete latches and reduces timing uncertainty by providing matched propagation delays across all 8 bits. | Use Scenario: Isolating and buffering GPIO expansion lines between MCU and field-side sensors/actuators. IC Role / Device Role / Timing Role: Bidirectional bus interface element controlled by MCU GPIO to enable/disable sensor read/write paths. Use Value: Prevents signal contention during hot-swap events and allows dynamic reconfiguration of I/O direction without hardware changes. |
| Video Signal Timing Control | Legacy Peripheral Interface |
Use Scenario: Capturing horizontal sync or pixel count values in CRT controller logic for VGA or composite video generation. IC Role / Device Role / Timing Role: Edge-triggered counter output latch synchronized to pixel clock domain. Use Value: Ensures glitch-free display timing updates by eliminating metastability risk during register readback. | Use Scenario: Interfacing ISA-bus peripherals (e.g., legacy data acquisition cards) requiring 8-bit data strobing. IC Role / Device Role / Timing Role: Data latch aligned to ISA IOW or IOR control signals for safe peripheral register access. Use Value: Meets ISA timing requirements for setup/hold and output enable/disable windows without custom glue logic. |
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 |
|---|---|---|---|
| SN74HC374N | Same pinout and AC/DC specs; TI version uses different internal layout but identical functional behavior per JEDEC 7A | No difference in bus latching or timing-critical roles; validated for same industrial temperature range (−40 °C to +85 °C) | Select SN74HC374N when TI-sourced supply chain alignment is required or for dual-sourcing redundancy |
| 74HCT374N,653 | TTL-compatible input thresholds (VIH = 2.0 V min); slightly slower fmax (48 MHz typ at VCC = 5 V) and higher tPHL/tPLH (13 ns typ) | Better suited for direct interfacing with 5 V TTL outputs without level shifters; less suitable for 3.3 V-only systems | Choose 74HCT374N,653 only when driving from legacy 5 V TTL logic families where VIH/VIL margins are marginal |
Compared with SN74HC374N and 74HCT374N,653, the 74HC374N,652 offers optimal balance of speed (83 MHz max), wide VCC range (2–6 V), and CMOS input compatibility-making it preferred for modern mixed-voltage embedded designs where power efficiency and noise immunity are prioritized over legacy TTL interfacing.
Availability
74HC374N,652 is available at Aetrix Electronics and suitable for microprocessor address latching, industrial I/O expansion, video timing control, and legacy peripheral interface applications requiring stable component supply and long-term obsolescence management.
Supply support for 74HC374N,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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete, logic, and power MOSFET solutions for automotive, industrial, computing, and consumer markets.
The 74HC374N,652 belongs to Nexperia's 74HC logic family-designed specifically for robust, low-power, pin-compatible replacements of legacy TTL latches in space-constrained and thermally demanding embedded systems.
FAQ
What is the maximum operating frequency of the 74HC374N,652?
The 74HC374N,652 achieves a maximum clock frequency (fmax) of 83 MHz at VCC = 6.0 V and Tamb = +25 °C with CL = 50 pF. At industrial temperature extremes (−40 °C to +85 °C), fmax drops to 70 MHz under the same conditions. These values are measured per JEDEC 7A and confirmed in Nexperia's official 74HC374 datasheet revision December 1990.
Does the 74HC374N,652 support 3.3 V operation?
Yes, the 74HC374N,652 is fully specified for VCC = 2.0 V to 6.0 V, including reliable operation at 3.3 V. At VCC = 3.3 V, it maintains valid logic thresholds (VIH ≥ 2.1 V, VIL ≤ 1.2 V), delivers tPHL/tPLH ≤ 50 ns, and supports fmax ≥ 40 MHz-making it suitable for mixed-voltage 3.3 V/5 V system designs without level translation.
How does the OE pin function in the 74HC374N,652?
The OE (output enable) pin on the 74HC374N,652 is an active-LOW asynchronous control. When OE = LOW, Q0–Q7 drive their registered values; when OE = HIGH, all eight outputs enter high-impedance state regardless of CP or Dn activity. Critically, OE has no effect on internal flip-flop states-data remains latched and ready for immediate output upon OE reassertion.
Is the 74HC374N,652 pin-compatible with the 74LS374?
Yes, the 74HC374N,652 is pin-compatible with the bipolar 74LS374 and meets JEDEC standard no. 7A for TTL replacement. It shares identical pin configuration (20-pin DIP), same D0–D7, Q0–Q7, CP, OE, GND, and VCC assignments, and matches LS374's functional truth table-enabling drop-in upgrade to lower power and improved noise immunity without PCB modification.
What is the input capacitance of the 74HC374N,652?
The 74HC374N,652 exhibits a typical input capacitance (CI) of 3.5 pF per input pin (Dn, CP, OE), as measured and published in Nexperia's official datasheet. This low value minimizes capacitive loading on upstream drivers, preserves signal rise/fall times in high-speed buses, and contributes to the device's low dynamic power consumption (CPD = 17 pF per flip-flop).
74HC374N,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:
- 83 MHz
- Max Propagation Delay @ V, Max CL:
- 28ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- 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
74HC374N,652 FAQ
1.How can I place an order for 74HC374N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC374N,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 74HC374N,652 reliable?
The price and inventory of 74HC374N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC374N,652 is usually 5 days.
3.What payment methods are accepted for 74HC374N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC374N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC374N,652?
74HC374N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC374N,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 74HC374N,652?
For technical support, including 74HC374N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC374N,652 requirements.
6.How does Aetrix verify that 74HC374N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC374N,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 74HC374N,652 meets industry standards.
7.What is the process for return or replacement of 74HC374N,652?
All 74HC374N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC374N,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 74HC374N,652 part is unused and in its original packaging.
Return procedure for 74HC374N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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