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Texas Instruments 74ACT11112N
- Part No.:
- 74ACT11112N
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
74ACT11112N.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 16DIP
- Quantity:
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Inventory:3,586
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Product details
Overview
74ACT11112N from Texas Instruments is a dual J-K negative-edge-triggered flip-flop with independent clear and preset inputs, operating at 4.5–5.5 V supply, supporting 125 MHz clock frequency, with 3.5 ns setup time and TTL-compatible inputs - used in synchronous logic control, state machines, and digital counters in industrial control systems.
For engineers reviewing the 74ACT11112N datasheet, 74ACT11112N pinout, 74ACT11112N application, or 74ACT11112N equivalent, key selection criteria include negative-edge triggering behavior, dual independent J-K functionality with asynchronous set/reset, guaranteed operation from –40°C to 85°C, and compatibility with legacy 300-mil DIP-based board designs.
Technical Context
This device implements two fully independent J-K flip-flops sharing no internal signal paths, each triggered on the negative edge of CLK and featuring asynchronous active-low PRE and CLR inputs that override clocked operation. Each flip-flop supports toggle mode when J and K are tied high.
It uses Texas Instruments' EPIC (Enhanced-Performance Implanted CMOS) 1-µm process, delivering 500-mA latch-up immunity at 125°C and center-pin VCC/GND placement to suppress high-speed switching noise - critical for stable operation in mixed-signal PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and CMOS logic rails without level-shifting. |
| Max Clock Frequency | 125 MHz - enables high-speed sequential logic in data path controllers and pipeline registers. |
| Setup Time (tsu) | 3.5 ns (min) - defines minimum data stability window before CLK↓ for reliable state capture. |
| Propagation Delay (tPLH/tPHL) | 1.5–7.7 ns - determines worst-case timing margin between clock edge and output transition. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems without derating. |
| Input Compatibility | TTL-voltage compatible (VIL ≤ 0.8 V, VVIH ≥ 2 V) - allows direct interfacing with legacy 74LS/74F families. |
| Output Drive | ±24 mA (IOH/IOL) - sufficient to drive multiple 74ACT inputs or small capacitive loads without buffering. |
Pinout & Package
74ACT11112N is supplied in a 16-pin plastic dual in-line package (PDIP), 300-mil width, with center-aligned VCC (Pin 16) and GND (Pin 8) to minimize ground bounce and supply noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1PRE, 2PRE | Asynchronous preset input (active low) | Forces Q = H / Q̅ = L independently of clock - used for initialization or fault recovery. |
| 1CLR, 2CLR | Asynchronous clear input (active low) | Forces Q = L / Q̅ = H independently of clock - essential for reset-dominant control sequences. |
| 1CLK, 2CLK | Clock input (negative-edge sensitive) | Triggers state update only on falling edge - eliminates metastability from slow-rising clocks. |
| 1J, 1K, 2J, 2K | Data inputs (J and K per flip-flop) | Define next-state logic: J=H/K=L → set; J=L/K=H → reset; J=K=H → toggle; J=K=L → hold. |
| 1Q, 1Q̅, 2Q, 2Q̅ | Complementary outputs | Provide true and inverted registered outputs - supports differential signaling or feedback paths. |
| VCC (Pin 16), GND (Pin 8) | Power supply terminals | Center-pin placement reduces loop inductance and improves high-frequency decoupling effectiveness. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input-to-output signal path avoids internal routing bottlenecks - simplifies PCB trace routing and reduces crosstalk risk. |
| Fully buffered inputs | High noise immunity (>400 mV noise margin at VCC = 5 V) - prevents false triggering from EMI or ground bounce. |
| EPIC 1-µm CMOS process | Enables 125 MHz operation with low static power (ICC < 40 µA typical) and 500-mA latch-up immunity. |
| TTL-compatible input thresholds | Direct connection to 74LS, 74F, and other bipolar logic families without interface circuitry. |
| Dual independent flip-flops | No shared control or timing resources - enables parallel state management in finite-state machines. |
Applications
| Industrial PLC Logic Modules | Digital Test Equipment Counters |
|---|---|
|
Use Scenario: Implementing synchronous counter chains and shift registers in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: Dual J-K flip-flop providing edge-triggered state storage with asynchronous reset for cycle synchronization and error recovery. Use Value: Guaranteed 125 MHz operation and –40°C to +85°C rating ensure deterministic timing across temperature and voltage variations in factory-floor environments. |
Use Scenario: Building high-speed event counters and frequency dividers in automated test equipment front-end logic. IC Role / Device Role / Timing Role: Negative-edge-triggered register capturing pulse trains with precise setup/hold timing for accurate measurement gating. Use Value: 3.5 ns setup time and 1.5 ns min propagation delay enable sub-8 ns resolution in time-interval analyzers and pattern generators. |
| Legacy System Upgrades | Communications Protocol State Machines |
|
Use Scenario: Replacing obsolete 74LS112 or 74HC112 in field-deployed instrumentation with improved speed and noise immunity. IC Role / Device Role / Timing Role: Pin-compatible upgrade path offering TTL-compatible inputs and enhanced AC performance over older families. Use Value: Direct drop-in replacement in existing 16-pin DIP sockets with no layout change required - reduces redesign cost and qualification time. |
Use Scenario: Managing handshaking and framing states in UART, SPI, or custom serial protocol engines. IC Role / Device Role / Timing Role: Toggle-capable J-K flip-flop implementing baud-rate dividers and frame-sync detectors in hardware-based protocol logic. Use Value: Independent PRE/CLR inputs allow immediate state reset upon framing error detection - improving protocol robustness without CPU intervention. |
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 |
|---|---|---|---|
| SN74ACT112N | Same dual J-K function but with positive-edge clock trigger; identical PDIP-16 package and 4.5–5.5 V operation. | Requires clock polarity inversion in existing negative-edge designs; otherwise pinout and DC specs match. | Select SN74ACT112N only if system clock edges are positive-going and layout allows re-timing analysis. |
| 74AC112N | AC-series variant: lower drive strength (±24 mA vs ±50 mA), higher max fCLK (175 MHz), same DIP-16 footprint. | Not recommended where latch-up immunity >500 mA at 125°C is required - AC series lacks EPIC process hardening. | Choose 74AC112N only for new designs prioritizing speed over ruggedness in benign thermal environments. |
Compared with SN74ACT112N and 74AC112N, the 74ACT11112N uniquely combines negative-edge triggering, EPIC-process latch-up immunity, and full TTL compatibility - making it the sole option for upgrading legacy negative-edge systems requiring industrial reliability.
Availability
74ACT11112N is available at Aetrix Electronics and suitable for industrial control modules, digital test instrumentation, legacy system upgrades, and communications protocol state machines requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ACT11112N 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 leader founded in 1930, specializing in analog, embedded processing, logic, and power management ICs for industrial, automotive, and communications markets.
The 74ACT11112N belongs to TI's Advanced CMOS (ACT) logic family, designed specifically to bridge TTL and CMOS domains with high-speed, noise-immune, pin-compatible replacements for legacy 74LS and 74F logic in industrial and instrumentation applications.
FAQ
What is the clocking behavior of the 74ACT11112N?
The 74ACT11112N uses negative-edge triggering: each flip-flop updates its Q and Q̅ outputs precisely on the falling edge of the CLK signal. This behavior is independent of clock rise/fall time and is defined by voltage threshold crossing. The 74ACT11112N does not respond to positive clock edges or level-sensitive inputs - ensuring deterministic timing in noisy environments.
Does the 74ACT11112N support toggle mode operation?
Yes, the 74ACT11112N supports toggle mode when both J and K inputs are held high. In this configuration, each negative clock edge causes the output to invert - enabling direct implementation of divide-by-2 counters and oscillators. The 74ACT11112N maintains this behavior across its full operating temperature range (–40°C to +85°C) and supply voltage (4.5–5.5 V).
Is the 74ACT11112N pin-compatible with older 74LS112 or 74HC112 devices?
The 74ACT11112N shares the same 16-pin PDIP package and pinout as 74LS112 and 74HC112, including identical assignments for PRE, CLR, CLK, J, K, Q, and Q̅. However, the 74ACT11112N requires no external pull-ups and delivers stronger drive capability - making it a functional and physical drop-in replacement in most legacy designs using those parts.
What is the significance of the EPIC process used in the 74ACT11112N?
The EPIC (Enhanced-Performance Implanted CMOS) process in the 74ACT11112N provides 500-mA latch-up immunity at 125°C - far exceeding standard CMOS - and enables stable 125 MHz operation with low static current. This process also contributes to the 74ACT11112N's robustness against ESD and ground bounce in industrial PCB layouts with mixed analog/digital sections.
Can the 74ACT11112N operate reliably at 4.5 V supply?
Yes, the 74ACT11112N is fully characterized down to 4.5 V supply voltage, meeting all AC and DC specifications including 125 MHz maximum clock frequency, 3.5 ns minimum setup time, and TTL-compatible input thresholds. At 4.5 V, the 74ACT11112N maintains full functionality across its –40°C to +85°C operating range without derating.
74ACT11112N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74ACT11112N FAQ
1.How can I place an order for 74ACT11112N through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11112N 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 74ACT11112N reliable?
The price and inventory of 74ACT11112N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11112N is usually 5 days.
3.What payment methods are accepted for 74ACT11112N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11112N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11112N?
74ACT11112N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11112N 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 74ACT11112N?
For technical support, including 74ACT11112N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11112N requirements.
6.How does Aetrix verify that 74ACT11112N is sourced from the original manufacturer or authorized distributors?
All 74ACT11112N 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 74ACT11112N meets industry standards.
7.What is the process for return or replacement of 74ACT11112N?
All 74ACT11112N units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11112N, 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 74ACT11112N part is unused and in its original packaging.
Return procedure for 74ACT11112N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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