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Texas Instruments SNJ54HC109W
- Part No.:
- SNJ54HC109W
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-CFlatPack
- Datasheet:
-
SNJ54HC109W.pdf
- Description:
- DUAL J-K POSITIVE-EDGE-TRIGGERED
- Quantity:
- Payment:
- Shipping:
Inventory:4,911
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Product details
Overview
SNJ54HC109W from Texas Instruments is a dual J-K positive-edge-triggered flip-flop with independent preset (PRE) and clear (CLR) inputs, operating across 2 V to 6 V supply range, delivering ±4-mA output drive at 5 V, 12 ns typical propagation delay, and 40-μA max ICC. It serves as a synchronous logic building block in military-grade timing, control, and state-machine circuits requiring radiation-tolerant operation down to –55°C.
For engineers reviewing the SNJ54HC109W datasheet, SNJ54HC109W pinout, SNJ54HC109W application, or SNJ54HC109W equivalent, this device supports toggle and D-type configurations via J/K input wiring, meets MIL-PRF-38535 Class V requirements, and enables deterministic edge-triggered state storage in high-reliability digital systems.
Technical Context
The SNJ54HC109W implements two fully independent J-K flip-flops, each with asynchronous active-low PRE and CLR inputs that override clocked operation. Its positive-edge triggering is voltage-level–based-not dependent on clock rise time-ensuring robust timing behavior under varying slew conditions.
Each flip-flop supports setup/hold times as low as 4 ns (at 6 V), operates over –55°C to +125°C, and maintains stable output states during data transitions after the hold interval. The device functions as a toggle flip-flop when K is grounded and J tied high, or as a D-type when J and K are shorted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - Enables interoperability with legacy 5-V TTL and modern low-voltage CMOS logic families. |
| Propagation Delay (tpd) | 12 ns typical at 6 V - Supports clock frequencies up to 29 MHz in worst-case SN54HC109 configuration. |
| Output Drive | ±4 mA at 5 V - Sufficient to directly drive 10 LSTTL loads without buffering. |
| Quiescent Current (ICC) | 40 μA max - Enables low-power operation in battery-backed or standby-critical military subsystems. |
| Operating Temperature | –55°C to +125°C - Qualified per MIL-PRF-38535 for extended-range aerospace and defense applications. |
| Input Leakage Current | 1 μA max - Minimizes unintended biasing in high-impedance control paths. |
| Setup Time (tsu) | 4 ns min at 6 V - Allows tight timing margins in high-speed synchronous designs. |
Pinout & Package
SNJ54HC109W uses a 16-pin CFP (Ceramic Flatpack) package measuring 10.16 mm × 6.73 mm, with hermetic ceramic construction and tin-lead (SNPB) lead finish, rated for military temperature range and exempt from RoHS compliance per MIL-spec requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 11, 12, 13, 14, 15, 16 | Functional I/O (CLK, J, K, PRE, CLR, Q, Q̅) | Standard dual J-K flip-flop signal mapping; pins 1–6 and 11–16 carry clock, data, control, and outputs for both sections. |
| 7 | GND | Power return reference for all logic and output stages; requires low-inductance connection to system ground plane. |
| 8 | VCC | Positive supply rail; must be bypassed with 0.1-μF capacitor placed adjacent to pin per TI layout guidance. |
| 9, 10 | NC | No internal connection - left unconnected per datasheet; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Preset/Clear | Active-low PRE and CLR override clocked operation - enables immediate state initialization or reset independent of clock timing. |
| Edge-Triggered Operation | Positive-edge detection based on voltage threshold - eliminates sensitivity to clock rise time variations in noisy environments. |
| Configurable Logic Mode | J/K tied together → D-type behavior; K grounded + J high → toggle mode - reduces external logic count in finite-state machines. |
| Military Temperature Range | –55°C to +125°C operation - validated for deployment in avionics, missile guidance, and space-qualified electronics. |
| Low Input Current | ≤1 μA max - prevents loading of upstream drivers and supports high-fanout control bus architectures. |
Applications
| Avionics Timing Control | Secure Communication State Machines |
|---|---|
Use Scenario: Synchronizing command sequencing in flight control computers where deterministic state transitions are mandated by DO-254. IC Role / Device Role / Timing Role: Dual J-K flip-flop providing clock-synchronized register storage for mode selection and fault-handling flags. Use Value: Asynchronous PRE/CLR allows immediate reinitialization during fault recovery; 12 ns tpd ensures sub-microsecond response to critical interrupts. |
Use Scenario: Implementing cryptographic key scheduling logic in Type 1 encryption modules requiring tamper-resilient state retention. IC Role / Device Role / Timing Role: Edge-triggered storage element maintaining secure state variables under EMV-compliant clock gating. Use Value: Hermetic CFP packaging and –55°C to +125°C rating ensure reliability in sealed, conduction-cooled enclosures exposed to wide thermal excursions. |
| Radar Pulse Generation | Missile Guidance Sequencing |
Use Scenario: Generating precise pulse-width-modulated trigger signals for T/R module activation in phased-array radar transceivers. IC Role / Device Role / Timing Role: Toggle-mode configured flip-flop dividing master oscillator output to produce synchronized RF gate pulses. Use Value: ±4-mA drive capability directly interfaces with GaN driver inputs; low ICC minimizes thermal load in densely packed RF front-end assemblies. |
Use Scenario: Managing stage-sequencing logic in solid-fuel rocket motor ignition controllers where single-event upset immunity is critical. IC Role / Device Role / Timing Role: Synchronous state register holding arming/disarming status and burn-time counters under radiation-hardened control firmware. Use Value: MIL-PRF-38535 Class V qualification and CFP hermeticity provide proven resilience against total ionizing dose (TID) and neutron flux exposure. |
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 |
|---|---|---|---|
| SN54HC109J | Same logic function and military temp range, but CDIP package (24.38 mm × 6.92 mm) with through-hole mounting and higher RθJA (67°C/W vs. 60.5°C/W for SNJ54HC109W). | Preferred for prototyping or legacy board repair where through-hole assembly is required; less suitable for high-density surface-mount layouts. | Select SN54HC109J only when mechanical compatibility with existing CDIP footprints is mandatory. |
| SNJ54HC109FK | LCCC-20 package (8.89 mm × 8.45 mm), same temperature range and spec sheet, but different pin count and layout - not pin-compatible. | Used in ultra-high-reliability space applications due to ceramic-leaded construction and enhanced thermal performance under vacuum. | Choose SNJ54HC109FK when radiation tolerance beyond standard MIL-PRF-38535 is required, such as in LEO satellite payloads. |
Compared with SN54HC109J and SNJ54HC109FK, the SNJ54HC109W offers optimal balance of surface-mount compatibility, thermal resistance (60.5°C/W), and proven field reliability in guided weapon systems - making it the preferred choice for new high-density military PCB designs.
Availability
SNJ54HC109W is available at Aetrix Electronics and suitable for avionics timing control, secure communication state machines, radar pulse generation, and missile guidance sequencing requiring stable component supply across extended temperature and long lifecycle commitments.
Supply support for SNJ54HC109W 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 U.S.-based semiconductor company specializing in analog and embedded processing technologies, with leadership in high-reliability military and aerospace ICs since the 1960s.
The SNJ54HC109W belongs to TI's SN54HC logic family, designed specifically for defense and space applications requiring MIL-PRF-38535 Class V qualification, hermetic packaging, and guaranteed operation from –55°C to +125°C.
FAQ
What is the maximum clock frequency supported by SNJ54HC109W?
The SNJ54HC109W supports a maximum clock frequency of 29 MHz at 6 V supply and 25°C ambient, per its switching characteristics table. At full military temperature range (–55°C to +125°C), derating applies: 25 MHz is recommended for reliable operation across the entire range. This value is derived from measured tpd and timing margin analysis in the official TI datasheet SCLS470C.
Does SNJ54HC109W require external pull-up resistors on PRE and CLR inputs?
No, SNJ54HC109W does not require external pull-up resistors on PRE and CLR inputs. These inputs are internally biased and specified to recognize VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC. When inactive (high), they must be held at VCC or logic high - typically achieved via direct connection or system-level bus driving - not passive pull-ups.
Is SNJ54HC109W RoHS compliant?
No, SNJ54HC109W is not RoHS compliant. It uses a tin-lead (SNPB) lead finish and is manufactured under MIL-PRF-38535 specifications, which explicitly exempt military-grade CFP devices from RoHS requirements. The part marking "8415001FA" and orderable number "SNJ54HC109W" confirm its non-RoHS, heritage military status.
Can SNJ54HC109W operate at 3.3 V supply?
Yes, SNJ54HC109W operates reliably at 3.3 V supply, within its specified 2 V to 6 V range. At 3.3 V, VOH is guaranteed ≥ 2.97 V (VIH = 2.31 V min), VOL ≤ 0.33 V (VIL = 1.0 V max), and tpd increases to ~18 ns typical - all verified in TI's electrical characteristics tables for SN54HC109 devices.
What is the meaning of "CFP (W)" in SNJ54HC109W's package designation?
"CFP (W)" stands for Ceramic Flatpack, Package Code W - a 16-pin, side-brazed, hermetically sealed ceramic package with 0.51-mm lead pitch and 10.16 mm × 6.73 mm body size. Per TI's packaging documentation, Code W corresponds to the CFP variant used exclusively for military-grade SN54HC-series devices like SNJ54HC109W.
SNJ54HC109W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54HC
- Package/Case:
- 16-CFlatPack
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 3 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-CFP
SNJ54HC109W FAQ
1.How can I place an order for SNJ54HC109W through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54HC109W 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 SNJ54HC109W reliable?
The price and inventory of SNJ54HC109W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54HC109W is usually 5 days.
3.What payment methods are accepted for SNJ54HC109W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54HC109W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54HC109W?
SNJ54HC109W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54HC109W 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 SNJ54HC109W?
For technical support, including SNJ54HC109W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54HC109W requirements.
6.How does Aetrix verify that SNJ54HC109W is sourced from the original manufacturer or authorized distributors?
All SNJ54HC109W 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 SNJ54HC109W meets industry standards.
7.What is the process for return or replacement of SNJ54HC109W?
All SNJ54HC109W units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54HC109W, 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 SNJ54HC109W part is unused and in its original packaging.
Return procedure for SNJ54HC109W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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