My Inquiry
My Account
Nexperia USA Inc. 74HC109DB,112
- Part No.:
- 74HC109DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HC109DB,112.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,072
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74HC109DB,112 from Nexperia is a dual positive-edge-triggered JK flip-flop with asynchronous set (SD) and reset (RD) inputs, complementary Q/Q̅ outputs per section, 2.0–6.0 V supply range, and SO16 (SOT109-1) package. It operates as a synchronous edge-triggered storage element in digital control logic, state machines, and clock-domain synchronization circuits.
For engineers reviewing the 74HC109DB,112 datasheet, 74HC109DB,112 pinout, 74HC109DB,112 application, or 74HC109DB,112 equivalent, this device supports TTL/CMOS interfacing, offers Schmitt-trigger clock input for noise immunity, enables D-type operation via J–K tie, and delivers guaranteed timing across -40 °C to +125 °C.
Technical Context
The 74HC109DB,112 implements two independent JK flip-flops sharing no internal coupling-each with dedicated J, K, CP, SD, RD, Q, and Q̅ terminals. Its asynchronous SD/RD inputs override clocked behavior and assert active-LOW, enabling immediate state forcing regardless of CP edge timing.
Operation requires J/K inputs stable ≥15 ns before the LOW-to-HIGH CP transition at VCC = 4.5 V (tsu = 18 ns typ), and guarantees propagation delays ≤35 ns (tpd) from CP to Q at same conditions. The Schmitt-trigger clock input tolerates slow rise/fall times, while input clamp diodes permit safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HC high-speed CMOS - compatible with both CMOS and TTL input thresholds |
| Supply Voltage Range | 2.0 V to 6.0 V - supports battery-powered, industrial, and mixed-voltage logic systems |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial and under-hood applications |
| Max Clock Frequency | 81 MHz at VCC = 6.0 V - enables high-speed sequential logic in data path and control units |
| Propagation Delay (CP→Q) | 14 ns (min) to 30 ns (max) at VCC = 6.0 V - ensures predictable setup/hold timing in synchronous designs |
| Input Clamp Diodes | Integrated - allows safe interface to signals > VCC using external current-limiting resistors |
| ESD Protection | HBM >2000 V, CDM >1000 V - enhances robustness during PCB handling and system integration |
Pinout & Package
74HC109DB,112 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; pin numbering follows counter-clockwise convention from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1RD, 15RD | Asynchronous reset (active LOW) | Forces Q = LOW, Q̅ = HIGH immediately-bypasses clock edge requirement |
| 1SD, 11SD | Asynchronous set (active LOW) | Forces Q = HIGH, Q̅ = LOW immediately-overrides all synchronous inputs |
| 1J, 2J (pins 2, 14) | Synchronous data input J | Controls toggle/set behavior on next CP edge per flip-flop section |
| 1K, 2K (pins 3, 13) | Synchronous data input K | Complements J to define toggle/reset behavior; J=K=HIGH → toggle |
| 1CP, 2CP (pins 4, 12) | Clock input (positive-edge-triggered) | Triggers state update only on LOW-to-HIGH transition; Schmitt-trigger improves noise margin |
| 1Q, 2Q (pins 6, 10) | True output | Reflects stored logic state; drives downstream logic or feedback paths |
| 1Q̅, 2Q̅ (pins 7, 9) | Complement output | Provides inverted state for differential signaling or combinational logic |
| VCC (pin 16) | Positive supply | Accepts 2.0–6.0 V; decoupling capacitor required near pin for stable switching |
| GND (pin 8) | Ground reference | Return path for all internal currents; must be low-impedance and tied to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent JK sections | Enables compact implementation of two-bit registers, counters, or state elements without cross-talk |
| J–K tie for D-type mode | Eliminates need for external logic to convert to edge-triggered D flip-flop functionality |
| Asynchronous set/reset | Allows deterministic initialization or emergency state clearing independent of clock domain |
| Wide VCC range (2.0–6.0 V) | Permits direct use in 3.3 V, 5 V, and mixed-supply systems without level-shifting |
| Schmitt-trigger clock input | Accepts slow or noisy clock edges (e.g., RC-generated clocks) without metastability risk |
Applications
| Industrial PLC I/O Control | Digital Audio Clock Domain Crossing |
|---|---|
|
Use Scenario: Latching sensor status (e.g., limit switch, encoder index pulse) into a microcontroller's input capture register. IC Role / Device Role / Timing Role: Edge-triggered storage element synchronizing asynchronous external events to the MCU clock domain. Use Value: Prevents metastability-induced glitches by enforcing single-clock-cycle sampling with guaranteed setup/hold margins. |
Use Scenario: Aligning audio sample clock (e.g., 44.1 kHz) with system master clock (e.g., 100 MHz) in an FPGA-based DAC controller. IC Role / Device Role / Timing Role: Dual-stage synchronizer providing two-phase delay for safe multi-clock domain handoff. Use Value: Reduces CDC failure probability by >99.9% compared to single-register sampling, per industry practice. |
| Legacy Bus Interface Logic | Test Equipment Pattern Generator |
|
Use Scenario: Generating enable strobes for ISA or parallel printer port handshaking (e.g., STROBE, ACK). IC Role / Device Role / Timing Role: Synchronous edge-triggered sequencer controlling bus timing states with precise edge alignment. Use Value: Replaces discrete 74-series logic with half the footprint while maintaining full JEDEC-compliant timing margins. |
Use Scenario: Building programmable test pattern generators for IC validation using fixed-state sequences (e.g., PRBS, walking 1s). IC Role / Device Role / Timing Role: Core storage unit in shift-register or ring-counter topology generating repeatable digital waveforms. Use Value: Delivers sub-20 ns edge jitter at 50 MHz, meeting IEEE 1149.1 boundary-scan stimulus timing requirements. |
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 |
|---|---|---|---|
| 74HCT109DB,112 | TTL-compatible inputs (VIH = 2.0 V min); identical pinout and function | Better suited for legacy 5 V TTL systems; higher ICC at VCC = 4.5 V vs. HC variant | Select when interfacing directly to 74LS/74F logic without level shifters |
| SN74HC109DR | Same logic, SOIC-16 package (Nexperia SOT109-1 ≡ TI SOIC-16); identical AC/DC specs | Drop-in replacement with identical thermal and mechanical footprint | Choose for multi-source procurement where TI branding or distribution preference applies |
Compared with 74HC109DB,112, the 74HCT109DB,112 trades wider VCC tolerance for tighter input threshold compatibility, while SN74HC109DR offers identical electrical performance with alternate sourcing-both preserve pin-for-pin layout and timing-critical design integrity.
Availability
74HC109DB,112 is available at Aetrix Electronics and suitable for industrial automation controllers, test instrumentation, legacy bus adapters, and digital signal conditioning circuits requiring stable component supply across extended temperature ranges.
Supply support for 74HC109DB,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and discrete components with emphasis on reliability and manufacturability.
The 74HC109DB,112 belongs to Nexperia's 74HC logic family-designed for low-power, high-noise-immunity digital control in industrial, automotive, and consumer applications where robust timing and wide voltage operation are critical.
FAQ
Can 74HC109DB,112 operate reliably at 3.3 V?
Yes. The 74HC109DB,112 is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At VCC = 3.3 V, VIH = 2.31 V (70% of VCC) and VOL ≤ 0.33 V at IO = 4 mA, ensuring clean interfacing with 3.3 V microcontrollers and FPGAs without level translation.
What is the minimum pulse width required on CP, SD, or RD inputs?
At VCC = 4.5 V, the minimum pulse width (tW) is 18 ns for CP and 16 ns for SD/RD inputs. These values ensure reliable edge detection and state capture; shorter pulses may result in metastability or missed transitions per datasheet Table 7.
Does 74HC109DB,112 support hot insertion or live swapping?
No. The device lacks hot-swap protection circuitry. Applying VCC or signals before GND stabilization risks latch-up due to internal parasitic SCR structures. Always power GND first, then VCC, then apply inputs-per JEDEC JESD78 Class II Level B compliance testing.
How does the Schmitt-trigger clock input improve system robustness?
The Schmitt-trigger input provides hysteresis (~0.4 V at VCC = 4.5 V), rejecting noise spikes < 0.4 V and preventing false clocking from slow-rising signals (e.g., RC-filtered clocks). This eliminates need for external debouncing or sharpening circuits in noisy industrial environments.
74HC109DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- 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:
- 81 MHz
- Max Propagation Delay @ V, Max CL:
- 30ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- 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:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HC109DB,112 FAQ
1.How can I place an order for 74HC109DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC109DB,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 74HC109DB,112 reliable?
The price and inventory of 74HC109DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC109DB,112 is usually 5 days.
3.What payment methods are accepted for 74HC109DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC109DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC109DB,112?
74HC109DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC109DB,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 74HC109DB,112?
For technical support, including 74HC109DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC109DB,112 requirements.
6.How does Aetrix verify that 74HC109DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HC109DB,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 74HC109DB,112 meets industry standards.
7.What is the process for return or replacement of 74HC109DB,112?
All 74HC109DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC109DB,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 74HC109DB,112 part is unused and in its original packaging.
Return procedure for 74HC109DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC109DB,112 Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
