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NXP Semiconductors 74HCT109N,652
- Part No.:
- 74HCT109N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
74HCT109N,652.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,102
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Product details
Overview
74HCT109N,652 from NXP Semiconductors (formerly Philips) is a dual positive-edge-triggered JK flip-flop with asynchronous set and reset inputs, operating at 4.5 V supply, delivering 61 MHz maximum clock frequency, 17 ns typical CP-to-Q propagation delay, and standard-output drive capability for synchronous logic control in digital systems.
For engineers reviewing the 74HCT109N,652 datasheet, 74HCT109N,652 pinout, 74HCT109N,652 application, or 74HCT109N,652 equivalent, this page delivers verified functional behavior, timing constraints, package mapping to DIP16, and real-world design implications for edge-triggered state storage in industrial control and instrumentation circuits.
Technical Context
The 74HCT109N,652 implements two independent JK flip-flops sharing no internal coupling, each with separate J, K, CP, SD, RD, Q, and Q̅ terminals. Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V) ensure interoperability with legacy LSTTL logic while maintaining CMOS power efficiency.
Schmitt-trigger action on clock inputs enables robust operation with slow-rising or noisy clock edges; asynchronous SD and RD inputs override clock activity and assert active-LOW logic levels independent of CP timing, supporting immediate state initialization or clearing without clock synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible CMOS with 4.5–5.5 V operation and LSTTL input thresholds |
| Max Clock Frequency | 61 MHz at VCC = 4.5 V - defines highest reliable toggle rate for synchronous counters or shift registers |
| CP-to-Q Propagation Delay | 17 ns typical (CL = 15 pF, VCC = 5 V) - determines minimum clock period and setup margin in pipelined designs |
| SD/RD-to-Q Propagation Delay | 14 ns typical (CL = 15 pF, VCC = 5 V) - sets minimum pulse width for reliable asynchronous initialization |
| Input Capacitance | 3.5 pF - limits capacitive loading on driving gates and supports high fan-out without signal degradation |
| Power Dissipation Capacitance | 22 pF per flip-flop - enables accurate dynamic power estimation using PD = CPD × VCC² × fi + Σ(CL × VCC² × fo) |
Pinout & Package
74HCT109N,652 is supplied in a 16-pin plastic dual in-line package (DIP16), compliant with JEDEC MS-001, with 0.3-inch body width and 0.1-inch lead pitch. Pin 1 is marked by a notch or dot; pins are numbered counter-clockwise from top-left corner when viewed from component side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1RD, 2RD - Asynchronous Reset (active LOW) | Forces Q = LOW regardless of clock or J/K state; requires stable LOW ≥16 ns before CP edge for reliable assertion |
| 2, 14, 3, 13 | 1J, 2J, 1K, 2K - Synchronous Data Inputs | J and K determine next-state transition on rising CP edge; must be stable ≥18 ns before CP edge (tsu) |
| 4, 12 | 1CP, 2CP - Positive-Edge Clock Input | Triggers state update on LOW-to-HIGH transition; Schmitt-trigger input tolerates rise/fall times up to 100 ns |
| 5, 11 | 1SD, 2SD - Asynchronous Set (active LOW) | Forces Q = HIGH regardless of clock or J/K state; removal time (trem) ≥16 ns required before next CP edge |
| 6, 10 | 1Q, 2Q - True Outputs | Standard-output drive (±4 mA at VCC = 4.5 V); complementary to Q̅ outputs for differential signaling or feedback |
| 7, 9 | 1Q̅, 2Q̅ - Complementary Outputs | Provides inverted logic state; enables direct connection to enable/disable logic without external inverters |
| 8 | GND | Reference ground for all internal circuitry and I/O; must be low-impedance path to minimize noise coupling |
| 16 | VCC | Positive supply (4.5–5.5 V); decoupling capacitor (100 nF ceramic) required within 10 mm of pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent JK flip-flops | Enables two-bit synchronous state storage in single IC; eliminates need for discrete gate-based latches |
| Asynchronous set/reset (active LOW) | Supports immediate system initialization or fault recovery without waiting for clock edge or J/K configuration |
| TTL-compatible input thresholds | Interoperates directly with 74LS/74ALS families without level-shifting; VIH = 2.0 V min ensures noise margin >400 mV |
| Schmitt-trigger clock input | Accepts slow or noisy clocks (e.g., from mechanical switches or RC oscillators) without metastability risk |
| Standard-output drive capability | Drives up to 10 LS-TTL loads or 20 HCMOS inputs; sufficient for direct connection to bus transceivers or LED drivers |
Applications
| Industrial PLC Timing Module | Digital Test Equipment Control |
|---|---|
|
Use Scenario: Storing status bits for sequential machine states in programmable logic controller scan cycles. IC Role / Device Role / Timing Role: Dual JK flip-flop provides synchronized register storage for two independent process flags, triggered by master scan clock. Use Value: Asynchronous reset ensures deterministic startup after power-on or watchdog timeout; Schmitt-trigger CP accepts noisy fieldbus clock signals. |
Use Scenario: Controlling test pattern sequencing in automated boundary-scan testers with precise edge-aligned stimulus generation. IC Role / Device Role / Timing Role: Edge-triggered state machine element generating multi-phase enable signals for driver/receiver selection. Use Value: 61 MHz fmax supports sub-16 ns timing resolution; complementary Q/Q̅ outputs eliminate need for external inverters in phase-splitting logic. |
| Legacy System Logic Upgrade | Instrumentation Front-End Synchronization |
|
Use Scenario: Replacing obsolete 74LS109 in retrofitted avionics display controllers requiring lower power and improved noise immunity. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for TTL-based JK functionality with identical DIP16 footprint and signal routing. Use Value: TTL-compatible inputs maintain full electrical compatibility; 22 pF CPD reduces dynamic power vs. LS family by >60% at 10 MHz operation. |
Use Scenario: Capturing analog-to-digital converter ready pulses and synchronizing sample strobes across multiple sensor channels. IC Role / Device Role / Timing Role: Synchronizer stage converting asynchronous ADC interrupt signals into clock-domain-aligned latch enables. Use Value: 14 ns SD/RD-to-Q delay ensures sub-20 ns response to emergency clear commands; 3.5 pF input capacitance minimizes loading on sensitive analog timing lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JK flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT109N | Identical logic function, pinout, and AC specs; manufactured by Texas Instruments with same 74HCT family spec compliance | No functional deviation; validated for same industrial temperature range (−40 °C to +85 °C) | Select SN74HCT109N when TI-sourced supply chain alignment or dual-sourcing strategy is required |
| 74HC109N,652 | Same pinout and DC characteristics but HC variant: CMOS-input thresholds (VIH = 3.5 V min), higher fmax (75 MHz), lower drive strength (±4 mA vs. ±4 mA - matched but different ICC profile) | Requires clean 5 V supply and CMOS-level drivers; unsuitable for direct interface with legacy TTL without level translation | Choose 74HC109N,652 only in fully CMOS systems where higher speed and lower static current justify input threshold mismatch |
Compared with SN74HCT109N and 74HC109N,652, the 74HCT109N,652 uniquely balances TTL interoperability, 61 MHz performance, and proven reliability in mixed-signal industrial control - making it optimal for upgrades and new designs requiring guaranteed LSTTL compatibility without redesign.
Availability
74HCT109N,652 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy system modernization requiring stable component supply, long-term lifecycle support, and traceable sourcing from original manufacturer channels.
Supply support for 74HCT109N,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, formerly Philips Semiconductors, is a global leader in high-reliability logic, RF, and automotive ICs, with over 50 years of heritage in industrial-grade digital components.
The 74HCT109N,652 belongs to the 74HCT logic family designed specifically for seamless integration between TTL and CMOS systems, targeting cost-sensitive, noise-prone industrial and instrumentation applications where compatibility and robustness are critical.
FAQ
What is the maximum operating voltage for the 74HCT109N,652?
The 74HCT109N,652 operates over a supply voltage range of 4.5 V to 5.5 V. Operation outside this range may cause undefined behavior or permanent damage. The device is not rated for 3.3 V operation - attempting to power the 74HCT109N,652 at 3.3 V will result in non-functional inputs due to insufficient VIH threshold margin.
Does the 74HCT109N,652 support asynchronous reset during clock activity?
Yes, the 74HCT109N,652 supports fully asynchronous reset via pins 1 and 15 (1RD and 2RD). These active-LOW inputs force Q = LOW independently of clock state or timing, provided the reset pulse width meets the minimum 16 ns requirement. This behavior is guaranteed in the 74HCT109N,652 datasheet under all valid VCC and temperature conditions.
Can the 74HCT109N,652 be used as a D-type flip-flop?
Yes, the 74HCT109N,652 can function as a D-type flip-flop by connecting J and K inputs together on each section. When J = K = HIGH, the output toggles; when J = K = LOW, the output holds; tying J to D and K to D̅ configures true D-latch behavior. This configuration is explicitly supported in the 74HCT109N,652 functional table and requires no external components.
What is the meaning of "Schmitt-trigger clock input" in the 74HCT109N,652?
The Schmitt-trigger clock input in the 74HCT109N,652 provides hysteresis (typically 0.5 V) on the CP pin, enabling reliable edge detection even with slow-rising or noisy clock signals - such as those from RC oscillators or mechanical switch debouncing circuits. This feature is intrinsic to the 74HCT109N,652 silicon design and does not require external components.
Is the 74HCT109N,652 pin-compatible with the older 74LS109?
Yes, the 74HCT109N,652 is pin-compatible with the 74LS109 in DIP16 packaging, including identical pin numbering, terminal functions, and physical dimensions. This allows direct replacement in existing PCB layouts without modification - a key design advantage confirmed in the Philips 74HC/HCT109 datasheet under "pin compatible with low power Schottky TTL (LSTTL)".
74HCT109N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Set(Preset) and Reset
- Type:
- JK Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 55 MHz
- Max Propagation Delay @ V, Max CL:
- 35ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- 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:
- 16-DIP
74HCT109N,652 FAQ
1.How can I place an order for 74HCT109N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT109N,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 74HCT109N,652 reliable?
The price and inventory of 74HCT109N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT109N,652 is usually 5 days.
3.What payment methods are accepted for 74HCT109N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT109N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT109N,652?
74HCT109N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT109N,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 74HCT109N,652?
For technical support, including 74HCT109N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT109N,652 requirements.
6.How does Aetrix verify that 74HCT109N,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT109N,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 74HCT109N,652 meets industry standards.
7.What is the process for return or replacement of 74HCT109N,652?
All 74HCT109N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT109N,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 74HCT109N,652 part is unused and in its original packaging.
Return procedure for 74HCT109N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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