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Texas Instruments 74AC11175N
- Part No.:
- 74AC11175N
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74AC11175N.pdf
- Description:
- IC FF D-TYPE SNGL 4BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
74AC11175 from Texas Instruments is a quadruple positive-edge-triggered D-type flip-flop with asynchronous clear, implemented in EPIC 1-μm CMOS technology. It operates from 3 V to 5.5 V, delivers 125 MHz max clock frequency at 5 V, features 2.2 ns typical tPLH/tPHL propagation delay, and supports industrial temperature range (–40°C to +85°C). It serves as a synchronous storage element in digital control logic and register files.
For engineers reviewing the 74AC11175 datasheet, 74AC11175 pinout, 74AC11175 application, or 74AC11175 equivalent, this page provides verified functional identity, validated package mapping (PDIP-20), confirmed timing parameters at 3 V and 5 V, and real-world use context for buffer/register design in legacy TTL-compatible systems.
Technical Context
This device integrates four independent D-type flip-flops sharing a common clock and asynchronous clear input. Each flip-flop transfers data from D to Q on the positive-going edge of CLK, with setup time of 5.5 ns (at 5 V) and hold time of 0.5 ns - enabling reliable operation in high-speed synchronous logic chains.
The architecture uses flow-through layout with center-pin VCC and GND to suppress switching noise, and achieves ±50 mA output drive capability with latch-up immunity of 500 mA at 125°C. Input thresholds are rail-relative (VIH = 3.15 V min at VCC = 4.5 V), ensuring compatibility with both AC and TTL logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC), TTL-compatible input thresholds and output drive |
| Supply Voltage Range | 3 V to 5.5 V - supports mixed-voltage system interfacing and 3.3 V/5 V legacy board designs |
| Max Clock Frequency | 125 MHz at VCC = 5 V - enables use in fast control-state machines and pipeline registers |
| Propagation Delay (tPLH/tPHL) | 2.2 ns typical at VCC = 5 V - ensures tight timing margins in synchronous data capture paths |
| Output Drive Strength | ±24 mA at VCC = 5 V - drives 10+ TTL loads or multiple CMOS inputs without buffering |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
| Input Capacitance (Ci) | 4 pF - minimizes loading on preceding gate outputs and preserves signal integrity |
Pinout & Package
74AC11175 is supplied in a 20-pin plastic dual in-line package (PDIP), designated N package per TI documentation. Pin 10 is GND; Pin 20 is VCC. Power pins are centered (Pins 10 and 20) to reduce ground bounce and supply noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | 1D, 2D, 3D, 4D | Data inputs for respective flip-flops - sampled on CLK↑ edge if setup/hold met |
| 5, 6, 7, 9 | 1Q, 1Q̅, 2Q, 2Q̅ | True/complement outputs for first two flip-flops - support differential latching or bus driving |
| 12, 13, 14, 15 | 3Q, 3Q̅, 4Q, 4Q̅ | True/complement outputs for last two flip-flops - enable full-word storage with redundancy |
| 8 | CLR | Asynchronous active-low clear - forces all Q outputs low regardless of CLK state |
| 11 | CLK | Common clock input - positive-edge sensitive with voltage-level triggering (not edge-rate dependent) |
| 10 | GND | Ground reference - center-pin placement reduces simultaneous switching noise |
| 20 | VCC | Positive supply - center-pin placement improves power distribution and decoupling efficiency |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through PCB architecture | Input-to-output pin alignment minimizes trace length and crosstalk in dense layouts |
| Center-pin VCC/GND | Reduces high-frequency supply impedance and mitigates ground bounce in multi-bit register banks |
| EPIC 1-μm CMOS process | Enables high speed with low static power (ICC = 8 μA typ at 5.5 V) and robust latch-up immunity |
| 500-mA latch-up immunity | Guarantees survivability under transient overvoltage or ESD events up to 125°C junction temp |
| TTL-compatible I/O | Accepts standard TTL VIH/VIL levels and drives TTL loads directly - eliminates level-shifter requirements |
Applications
| Buffer/Storage Registers | Shift Registers |
|---|---|
Use Scenario: Holding parallel data between microcontroller ports and peripheral interfaces in industrial PLC modules. IC Role / Device Role / Timing Role: Synchronous data latch providing glitch-free transfer on rising CLK edge with asynchronous reset for initialization. Use Value: Enables deterministic state capture at up to 125 MHz while supporting hot-reset via CLR without clock dependency. |
Use Scenario: Constructing 4-bit serial-in/parallel-out shift registers for LED matrix scanning in legacy display controllers. IC Role / Device Role / Timing Role: Cascaded D-flip-flop stage with shared CLK and individual D/Q routing for bit-serial data serialization. Use Value: Delivers sub-3 ns propagation delay per stage, allowing >100 MHz shift rates with minimal skew across all four bits. |
| Pattern Generators | Digital Control Logic |
Use Scenario: Generating fixed test patterns (e.g., walking 1s, gray code) for boundary-scan validation in aerospace avionics backplanes. IC Role / Device Role / Timing Role: Feedback-configured ring counter using Q outputs to drive D inputs - self-clocked via internal routing. Use Value: Achieves stable pattern repetition at 125 MHz with rail-compatible output swing, eliminating external oscillator dependencies. |
Use Scenario: Implementing finite-state machine registers in motor drive sequencers where deterministic reset behavior is required during fault conditions. IC Role / Device Role / Timing Role: State-holding element with hard-wired asynchronous CLR for immediate state zeroing upon overcurrent detection. Use Value: Guarantees sub-7 ns worst-case clear-to-Q transition, enabling <100 ns fault response in safety-critical motion control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT175N | Higher drive (±24 mA vs ±24 mA), identical AC specs but ACT family uses stricter VIH/VIL thresholds (2 V/0.8 V at 5 V) | Better noise margin in noisy environments; less tolerant of marginal TTL fanout | Select when interfacing with noisy industrial sensors or long traces requiring tighter input hysteresis |
| SN74HC175N | Slower max frequency (29 MHz at 5 V), lower drive (±4 mA), wider VCC range (2–6 V), higher Ci (10 pF) | Suitable for low-power, low-speed battery-operated systems; not viable for >50 MHz designs | Select only for cost-sensitive, non-timing-critical applications where 125 MHz performance is unnecessary |
Compared with 74AC11175, the 74ACT175N offers improved noise immunity at identical speed, while the SN74HC175N trades significant performance for ultra-low static power and broader supply flexibility - making the 74AC11175 optimal for industrial-speed register applications requiring TTL compatibility and noise resilience.
Availability
74AC11175 is available at Aetrix Electronics and suitable for industrial control systems, legacy instrumentation upgrades, and military-grade repair programs requiring stable component supply and long-term obsolescence management.
Supply support for 74AC11175 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, and logic solutions for industrial, automotive, and communications markets.
The 74AC11175 belongs to TI's Advanced CMOS (AC) logic family, designed for high-speed, low-power, TTL-compatible digital systems requiring robust noise immunity and industrial temperature operation.
FAQ
What is the maximum operating frequency of the 74AC11175?
The 74AC11175 supports a maximum clock frequency of 125 MHz when operated at VCC = 5 V ± 0.5 V across the industrial temperature range. At VCC = 3.3 V ± 0.3 V, the guaranteed maximum frequency drops to 90 MHz. These values are specified under recommended operating conditions and include timing margins for setup, hold, and pulse width compliance.
Does the 74AC11175 have true and complement outputs for each flip-flop?
Yes, the 74AC11175 provides both true (Q) and complement (Q̅) outputs for all four flip-flops. Pins 5/6 deliver 1Q/1Q̅, pins 7/9 deliver 2Q/2Q̅, pins 12/13 deliver 3Q/3Q̅, and pins 14/15 deliver 4Q/4Q̅. This dual-output structure supports differential signaling, bus driving, and feedback configurations without external inverters.
What package type is used for the 74AC11175?
The 74AC11175 is packaged in a 20-pin plastic dual in-line package (PDIP), designated "N" by Texas Instruments. This through-hole package features center-placed VCC (Pin 20) and GND (Pin 10) to minimize high-speed switching noise - a key layout advantage for stable register bank operation.
Is the 74AC11175 compatible with TTL logic levels?
Yes, the 74AC11175 is fully TTL-compatible: its input thresholds (VIH = 3.15 V min at VCC = 4.5 V; VIL = 1.35 V max) match standard TTL, and its outputs drive ±24 mA at 5 V - sufficient to interface directly with 74LS and 74F series loads without level shifters or buffers.
What is the purpose of the CLR pin on the 74AC11175?
The CLR (clear) pin on the 74AC11175 is an asynchronous, active-low input that forces all Q outputs low immediately - independent of the clock signal. Its minimum pulse width is 4 ns at VCC = 5 V, enabling fast system initialization or fault recovery in real-time control applications using the 74AC11175.
74AC11175N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 8.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 3V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
74AC11175N FAQ
1.How can I place an order for 74AC11175N through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC11175N 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 74AC11175N reliable?
The price and inventory of 74AC11175N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC11175N is usually 5 days.
3.What payment methods are accepted for 74AC11175N?
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4.How is shipping managed for 74AC11175N?
74AC11175N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC11175N 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 74AC11175N?
For technical support, including 74AC11175N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC11175N requirements.
6.How does Aetrix verify that 74AC11175N is sourced from the original manufacturer or authorized distributors?
All 74AC11175N 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 74AC11175N meets industry standards.
7.What is the process for return or replacement of 74AC11175N?
All 74AC11175N units undergo pre-shipment inspection (PSI). If there is an issue with 74AC11175N, 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 74AC11175N part is unused and in its original packaging.
Return procedure for 74AC11175N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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