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Nexperia USA Inc. 74HCT112DB,118
- Part No.:
- 74HCT112DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT112DB,118.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,854
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Product details
Overview
74HCT112DB,118 from Nexperia is a dual negative-edge-triggered JK flip-flop with asynchronous active-LOW set (nSD) and reset (nRD), complementary Q/nQ outputs per channel, TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), and SO16 (SOT109-1) package. It operates from -40 °C to +125 °C and supports clock frequencies up to 64 MHz at VCC = 4.5 V in industrial and automotive control logic.
For engineers reviewing the 74HCT112DB,118 datasheet, 74HCT112DB,118 pinout, 74HCT112DB,118 application, or 74HCT112DB,118 equivalent, this device serves as a synchronous state-storage element in digital control sequencers, bus interface handshaking, and edge-sensitive register banks where deterministic setup/hold timing (tsu = 16 ns, th = 0 ns at VCC = 4.5 V) and robust noise immunity via Schmitt-trigger clock input are required.
Technical Context
This device implements two independent JK flip-flops sharing no internal coupling-each with dedicated J, K, nCP, nSD, nRD, Q, and nQ terminals. The negative-edge clock trigger and asynchronous low-active set/reset enable precise state capture and forced initialization without clock dependency.
Its TTL-level input compatibility (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V) ensures seamless interfacing with legacy 5 V logic families, while Schmitt-trigger action on nCP provides immunity to slow-rising or noisy clock signals, and clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible CMOS, enabling direct connection to 5 V bipolar logic without level shifters |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V system rails; operation outside this range invalidates timing and DC specs |
| Max Clock Frequency | 64 MHz at VCC = 4.5 V - supports high-speed control sequencing in PLC I/O modules and motor drive state machines |
| Propagation Delay (nCP → nQ) | 21 ns typical at VCC = 4.5 V, CL = 50 pF - defines worst-case latency between clock edge and output update |
| Setup Time (nJ/nK) | 16 ns minimum before HIGH-to-LOW nCP edge - critical timing margin for reliable state transition at 64 MHz |
| Input Clamp Diodes | Integrated - permits safe interface to signals up to VCC + 0.5 V using external current-limiting resistors |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets JEDEC JS-001/JS-002 Class 2/C3 for robust handling in assembly environments |
Pinout & Package
74HCT112DB,118 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 |
|---|---|---|
| 1CP, 13CP | Clock input (Channel 1 & 2) | Negative-edge triggered; Schmitt-trigger input enables tolerance to slow or noisy clock edges |
| 1J, 2J / 1K, 2K | Data inputs (J and K per channel) | Control toggle/set/reset/hold behavior; must be stable ≥16 ns before nCP falling edge |
| 1SD, 2SD / 1RD, 2RD | Asynchronous set/reset (active LOW) | Force Q = HIGH or LOW independently of clock; priority over J/K and nCP when asserted |
| 1Q, 2Q / 1Q, 2Q | True and complement outputs (per channel) | Provide latched state and its inverse; fan-out capability supports driving multiple CMOS/TTL loads |
| VCC (Pin 16), GND (Pin 8) | Power supply terminals | Decoupling capacitor (100 nF ceramic) required within 10 mm of VCC/GND pins for stable high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V - eliminates need for external level translators when interfacing with 74LS or microcontroller GPIOs |
| Schmitt-trigger clock input | hysteresis on nCP - suppresses metastability from slow-rising clocks in industrial sensor interfaces |
| Asynchronous set/reset | Independent nSD/nRD per channel - enables immediate state initialization or fault recovery without waiting for next clock edge |
| Wide temperature range | -40 °C to +125 °C - qualified for under-hood automotive control units and industrial motor drives |
| Low dynamic power | CPD = 30 pF - limits switching power dissipation to <1.5 mW per flip-flop at 10 MHz, reducing thermal load in dense logic arrays |
Applications
| Industrial PLC Sequencer | Automotive Body Control Module |
|---|---|
|
Use Scenario: Latching door lock status and window position feedback in real-time safety-critical sequences. IC Role / Device Role / Timing Role: Dual-channel state register storing actuator commands; negative-edge clock synchronizes with CAN message reception timestamps. Use Value: Asynchronous nRD allows immediate reset on fault detection (e.g., short-circuit), bypassing clock latency for fail-safe response. |
Use Scenario: Debouncing ignition switch transitions and managing headlight dimming states across multiple vehicle variants. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing mechanical switch closures; Schmitt-trigger nCP rejects EMI-induced glitches on 12 V harness lines. Use Value: TTL-level inputs interface directly with MCU GPIOs without pull-up resistors, simplifying BOM and PCB layout. |
| Digital Bus Interface Handshaking | Test Equipment Pattern Generator |
|
Use Scenario: Coordinating data valid strobes and acknowledge signals between FPGA and legacy parallel peripherals (e.g., ADCs, DACs). IC Role / Device Role / Timing Role: Dual JK latch implementing ready/valid handshake protocol; J/K inputs configure toggle mode for automatic ACK generation. Use Value: Complementary Q/nQ outputs drive differential enable lines, improving noise margin in mixed-signal test benches. |
Use Scenario: Generating precise, repeatable stimulus waveforms for IC functional validation in ATE systems. IC Role / Device Role / Timing Role: Clock-domain crossing register holding pattern bits; 64 MHz max fmax supports 15.6 ns resolution at 64 Mbit/s test rates. Use Value: Guaranteed tsu/th timing margins ensure deterministic bit capture even with marginal clock skew across multi-board fixtures. |
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 |
|---|---|---|---|
| 74HC112D,118 | CMOS-level inputs (VIH = 3.15 V min at VCC = 4.5 V); higher propagation delay (35 ns typ vs. 21 ns) | Requires level-shifting when interfacing with 5 V TTL sources; better suited for pure CMOS systems | Select when operating in mixed-voltage domains where VIH > 3 V is guaranteed and speed is secondary to power efficiency |
| SN74LS112N | Bipolar TTL technology; higher ICC (16 mA typ), narrower temp range (-40 °C to +85 °C), no Schmitt-trigger nCP | Higher power draw and lower noise immunity limit use in battery-powered or EMI-heavy environments | Choose only for legacy board replacements where pinout and logic function match but modern reliability and efficiency are not required |
Compared with 74HC112D,118 and SN74LS112N, the 74HCT112DB,118 uniquely balances TTL compatibility, industrial temperature resilience, and Schmitt-trigger noise rejection-making it optimal for new designs requiring robustness without sacrificing speed or integration density.
Availability
74HCT112DB,118 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, digital test equipment, and bus interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT112DB,118 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 semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer applications.
The 74HCT112DB,118 belongs to Nexperia's 74HCT logic family, engineered specifically for interoperability with legacy TTL systems while leveraging CMOS efficiency-targeting cost-sensitive, high-reliability digital control applications.
FAQ
What is the maximum allowable clock frequency for reliable operation?
The 74HCT112DB,118 supports up to 64 MHz at VCC = 4.5 V with CL = 50 pF, as specified in Table 7. At VCC = 5.5 V, maximum frequency drops to 24 MHz due to increased propagation delay and reduced noise margin. Operation above these values risks metastability or incorrect state capture, especially under temperature extremes or heavy capacitive loading.
Can the set and reset inputs be used simultaneously?
No-simultaneous LOW assertion of nSD and nRD leads to undefined output states (per Table 3). The device does not guarantee predictable Q/nQ behavior in this condition. Design practice requires ensuring mutual exclusion via external logic or timing control to avoid indeterminate latched states during power-up or fault recovery.
Is decoupling capacitance mandatory, and what value is recommended?
Yes-each 74HCT112DB,118 requires a 100 nF ceramic capacitor placed within 10 mm of the VCC (Pin 16) and GND (Pin 8) pins. This mitigates voltage droop during simultaneous output switching, preventing false clock triggering or logic upset. Larger bulk capacitance (e.g., 10 µF tantalum) should supplement this at the board level for multi-device power distribution.
Does this device support hot insertion or live swapping?
No-74HCT112DB,118 lacks hot-swap protection circuitry. Applying VCC before establishing proper GND connection, or inserting/removing while powered, may exceed absolute maximum ratings (e.g., VI > VCC + 0.5 V), causing latch-up or permanent damage. Always power-cycle the system before replacing this IC.
74HCT112DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 64 MHz
- Max Propagation Delay @ V, Max CL:
- 35ns @ 4.5V, 50pF
- Trigger Type:
- Negative 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:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HCT112DB,118 FAQ
1.How can I place an order for 74HCT112DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT112DB,118 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 74HCT112DB,118 reliable?
The price and inventory of 74HCT112DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT112DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT112DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT112DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT112DB,118?
74HCT112DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT112DB,118 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 74HCT112DB,118?
For technical support, including 74HCT112DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT112DB,118 requirements.
6.How does Aetrix verify that 74HCT112DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT112DB,118 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 74HCT112DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT112DB,118?
All 74HCT112DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT112DB,118, 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 74HCT112DB,118 part is unused and in its original packaging.
Return procedure for 74HCT112DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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