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Texas Instruments CD74HC109M
- Part No.:
- CD74HC109M
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC109M.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:806
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Product details
Overview
CD74HC109M from Texas Instruments is a dual positive-edge-triggered J-K flip-flop with asynchronous active-low set and reset inputs, operating from 2V to 6V supply, rated for -55°C to +125°C, featuring Schmitt-trigger clock inputs and typical fMAX of 54 MHz at VCC = 5V, CL = 15pF - used in synchronous logic control, state machines, and clock-domain synchronization in industrial timing circuits.
For engineers reviewing the CD74HC109M datasheet, CD74HC109M pinout, CD74HC109M application, or CD74HC109M equivalent, key selection considerations include its SOIC-16 package, HC logic family voltage tolerance, propagation delay (tPLH/tPHL ≤ 53 ns @ VCC = 4.5V, CL = 50pF), wide temperature range, and dual independent J-K functionality with asynchronous control.
Technical Context
The CD74HC109M implements two independent edge-triggered J-K flip-flops sharing no internal coupling; each has dedicated J, K, CP, S̅, and R̅ terminals. State transitions occur on the low-to-high clock edge, while set and reset override clock action asynchronously and are active-low.
Its HC logic family ensures CMOS-level input thresholds (VIH ≥ 3.15V, VIL ≤ 1.35V @ VCC = 4.5V), high noise immunity (NIL/NIH = 30% of VCC), and fanout of 10 LSTTL loads over full temperature range - enabling robust interfacing in mixed-logic systems without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), compatible with 2V–6V supply - supports battery-powered and multi-rail systems without voltage translation. |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial, aerospace, and automotive under-hood applications. |
| Max Clock Frequency | 54 MHz @ VCC = 5V, CL = 15pF - enables use in medium-speed digital control loops and data sampling. |
| Propagation Delay | ≤ 53 ns (CP → Q, CL = 50pF, VCC = 4.5V) - ensures predictable timing margins in synchronous state machines. |
| Input Hysteresis | Schmitt-trigger clock inputs - suppresses noise-induced false triggering on slow or noisy clock edges. |
| Output Drive | ±25 mA per output, 10 LSTTL load fanout - directly drives standard TTL loads or small capacitive buses. |
| Quiescent Current | ≤ 80 µA @ -55°C to +125°C - supports low-power standby modes in energy-sensitive embedded controllers. |
Pinout & Package
CD74HC109M is supplied in a 16-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm body width, with standard JEDEC MO-001AC footprint and gull-wing leads. Thermal resistance θJA = 73°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15 | Functional I/O (J1, K1, CP1, S̅1, R̅1, Q1, Q̅1, J2, K2, CP2, S̅2, R̅2) | Independent dual-channel J-K flip-flop interface - pins assigned per truth table; no shared control lines between sections. |
| 7 | GND | Ground reference for all logic and power domains - must be low-impedance connection to minimize switching noise. |
| 8 | Q̅1 | Inverted output of Flip-Flop 1 - complements Q1; used for toggle feedback or complementary signal routing. |
| 9 | Q̅2 | Inverted output of Flip-Flop 2 - provides differential pair capability without external inverters. |
| 16 | VCC | Positive supply rail (2V–6V) - decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Set/Reset | Active-low S̅ and R̅ override clock edge - enables immediate state initialization or forced reset independent of system clock timing. |
| Schmitt-trigger clock inputs | Eliminates need for external hysteresis on noisy or slow-rising clocks - improves reliability in motor control or sensor interface applications. |
| Balanced propagation delays | tPLH ≈ tPHL across all outputs - minimizes duty cycle distortion in clock division or pulse generation circuits. |
| Wide supply voltage range | 2V–6V operation - allows direct interface with 3.3V microcontrollers, 5V legacy peripherals, and 2.5V low-power subsystems. |
| High noise immunity | NIL/NIH = 30% of VCC - tolerates >1.5V noise margin on inputs at 5V supply, reducing susceptibility to EMI in industrial environments. |
Applications
| Industrial PLC Sequencing | Digital Test Equipment Control |
|---|---|
Use Scenario: Implementing sequential step logic in programmable logic controller (PLC) modules where deterministic state transitions are required across multiple I/O cycles. IC Role / Device Role / Timing Role: Dual J-K flip-flop providing synchronized register storage for ladder logic outputs and status flags, triggered by system scan clock. Use Value: Asynchronous reset ensures safe power-up initialization; Schmitt-trigger CP inputs reject noise from relay coil transients in cabinet-mounted control units. | Use Scenario: Generating precise test pattern sequences in automated test equipment (ATE) for validating digital ICs under varying voltage and temperature conditions. IC Role / Device Role / Timing Role: Edge-triggered state element in pattern generator FSM, controlling stimulus timing and response sampling windows. Use Value: 54 MHz fMAX and ≤53 ns propagation delay enable sub-20 ns timing resolution; wide temperature rating supports thermal chamber testing. |
| Motor Control Feedback Sync | Legacy Bus Interface Logic |
Use Scenario: Synchronizing encoder quadrature signals and direction latches in brushless DC motor drivers operating in harsh electrical environments. IC Role / Device Role / Timing Role: J-K latch capturing commutation state changes on rising edge of hall sensor clock, with S̅/R̅ used for emergency stop assertion. Use Value: -55°C to +125°C rating matches motor housing thermal profiles; high noise immunity prevents spurious commutation due to PWM-induced EMI. | Use Scenario: Bridging modern microcontroller GPIOs to legacy parallel bus peripherals (e.g., EPROMs, LCD controllers) requiring J-K register behavior for address/data staging. IC Role / Device Role / Timing Role: Dual register stage buffering control signals and data bits, with independent clocking for handshake timing alignment. Use Value: 2V–6V supply compatibility allows direct 3.3V MCU interface without level shifters; SOIC-16 footprint simplifies retrofit onto existing PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual J-K flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC109DR | Same HC logic family, identical pinout, same SOIC-16 package, but manufactured by TI with updated process and RoHS-compliant finish; fMAX = 60 MHz @ 5V/15pF. | Higher speed and improved ESD robustness; suitable for new designs targeting higher clock rates or stricter environmental compliance. | Select SN74HC109DR when upgrading for performance or regulatory alignment; pin-compatible drop-in replacement with no layout change. |
| MC74HC109ADTR2G | ON Semiconductor variant; identical function and pinout, SOIC-16, -55°C to +125°C rating, but specified fMAX = 46 MHz @ 4.5V/50pF and slightly higher ICC max (100 µA). | Valid alternative where second-source assurance is required; minor timing margin reduction acceptable in non-critical control paths. | Choose MC74HC109ADTR2G for dual-sourcing strategy; verify setup/hold timing against target clock edge rate in final design. |
Compared with CD74HC109M, SN74HC109DR offers higher maximum frequency and modern packaging, while MC74HC109ADTR2G provides supply-chain diversification with minor trade-offs in speed and quiescent current - both retain identical functional behavior and SOIC-16 mechanical fit.
Availability
CD74HC109M is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, motor control, and legacy system repair requiring stable component supply across extended temperature ranges.
Supply support for CD74HC109M 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and logic solutions, with leadership in high-reliability industrial and automotive-grade components.
The CD74HC109M belongs to TI's 74HC logic family - designed for robust, low-power, wide-voltage digital interfacing in mission-critical industrial and aerospace systems where timing predictability and environmental resilience are essential.
FAQ
What is the maximum operating supply voltage for CD74HC109M?
The CD74HC109M supports a DC supply voltage range of 2V to 6V. Absolute maximum rating is 7V, but sustained operation above 6V may cause permanent damage. For reliable long-term use, VCC must remain within 2V–6V, with recommended operation at 4.5V–5.5V for optimal noise margin and speed.
Does CD74HC109M support true dual independent J-K flip-flops?
Yes, CD74HC109M integrates two fully independent J-K flip-flops (FF1 and FF2), each with dedicated J, K, CP, S̅, R̅, Q, and Q̅ terminals. There is no internal coupling or shared control - enabling simultaneous, asynchronous operation of both sections without crosstalk or timing dependency.
What is the meaning of the "M96" suffix in CD74HC109M96.A?
The "M96" suffix in CD74HC109M96.A indicates a 16-pin SOIC package supplied in tape-and-reel format with 2500 units per reel. The ".A" denotes an updated manufacturing lot or revision traceability code; it does not alter electrical or mechanical specifications of the CD74HC109M device itself.
Can CD74HC109M replace CD74HCT109M in a 5V system?
CD74HC109M can replace CD74HCT109M in 5V systems only if input logic levels from upstream devices meet HC thresholds (VIH ≥ 3.15V, VIL ≤ 1.35V). HCT accepts standard TTL inputs (VIH ≥ 2.0V), while HC requires higher VIH - verify driver compatibility before substitution to avoid marginal logic recognition.
Is CD74HC109M suitable for automotive under-hood applications?
CD74HC109M is rated for -55°C to +125°C operation and qualified for industrial use, but it is not AEC-Q100 qualified. For automotive under-hood applications requiring automotive-grade qualification, consider AEC-Q100-compliant alternatives such as SN74HC109QPWRQ1 - the CD74HC109M itself lacks automotive-specific reliability testing and documentation.
CD74HC109M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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:
- 60 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:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HC109M FAQ
1.How can I place an order for CD74HC109M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC109M 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 CD74HC109M reliable?
The price and inventory of CD74HC109M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC109M is usually 5 days.
3.What payment methods are accepted for CD74HC109M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC109M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC109M?
CD74HC109M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC109M 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 CD74HC109M?
For technical support, including CD74HC109M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC109M requirements.
6.How does Aetrix verify that CD74HC109M is sourced from the original manufacturer or authorized distributors?
All CD74HC109M 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 CD74HC109M meets industry standards.
7.What is the process for return or replacement of CD74HC109M?
All CD74HC109M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC109M, 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 CD74HC109M part is unused and in its original packaging.
Return procedure for CD74HC109M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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