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Texas Instruments CD74AC175NSRE4
- Part No.:
- CD74AC175NSRE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
CD74AC175NSRE4.pdf
- Description:
- IC FF D-TYPE SNGL 4BIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
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Product details
Overview
CD74AC175NSRE4 from Texas Instruments is a quadruple positive-edge-triggered D-type flip-flop with asynchronous clear, designed for synchronous data storage and register functions in digital logic systems. It features complementary Q/Q̅ outputs per stage, ±24mA output drive at 4.5–5.5V, 1.5V to 5.5V supply operation, and operates across –55°C to 125°C.
For engineers reviewing the CD74AC175NSRE4 datasheet, CD74AC175NSRE4 pinout, CD74AC175NSRE4 application, or CD74AC175NSRE4 equivalent, this device supports high-speed register design, shift register implementation, and pattern generation where balanced propagation delays, SCR-latchup resistance, and ESD-hardened CMOS performance are required.
Technical Context
The CD74AC175NSRE4 implements four independent D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input. Each stage provides true and complement outputs (Q and Q̅), enabling direct use in toggle, latch, or differential bus applications without external inverters.
Its AC-series CMOS process delivers bipolar-equivalent speed (up to 114 MHz at 5V) with significantly lower power than legacy F/AS/S families. Input transition rate limits (20 ns/V at 3.6–5.5V) and balanced tPLH/tPHL ensure deterministic timing across temperature and voltage ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 5.5 V - Enables single-rail operation across 1.8V, 3.3V, and 5V logic domains without level shifting. |
| Max Clock Frequency | 114 MHz at VCC = 5V - Supports high-throughput data capture in register files and pipeline stages. |
| Output Drive Current | ±24 mA at VCC = 4.5–5.5V - Drives 15 F-family loads directly; eliminates need for buffer fanout stages. |
| Propagation Delay | 3.1–12.2 ns (tPLH/tPHL, VCC = 5V, CL = 50pF) - Tight delay matching enables reliable setup/hold timing in multi-bit synchronous systems. |
| ESD Rating | ±2000 V HBM - Meets MIL-STD-883 Class 3015; suitable for industrial environments with moderate ESD exposure. |
| Operating Temperature | –55°C to +125°C - Qualified for extended-temperature automotive, aerospace, and downhole electronics use. |
| Power Dissipation Cap. | 55 pF (Cpd, VCC = 5V) - Predictable dynamic power consumption for thermal modeling in dense logic layouts. |
Pinout & Package
CD74AC175NSRE4 is housed in a 16-pin SOIC (D) package with 9.9 mm × 6.0 mm footprint and 1.75 mm nominal height. The body size is 9.9 mm × 3.9 mm; pins extend beyond body edges.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLR | Asynchronous active-low clear input - resets all four flip-flops independently of clock edge; overrides D inputs. |
| 2, 3, 6, 7, 10, 11, 14, 15 | Q / Q̅ | Complementary outputs per stage (1Q/1Q̅, 2Q/2Q̅, 3Q/3Q̅, 4Q/4Q̅) - Eliminates external inverters in differential bus or toggle applications. |
| 4, 5, 12, 13 | D | Data inputs for stages 1–4 - Latched on rising CLK edge if CLR is high; isolated when CLR is low. |
| 8 | GND | Ground reference - Must be connected to system ground plane; shared return for all internal logic and output drivers. |
| 9 | CLK | Positive-edge-triggered clock - Synchronizes data transfer across all four flip-flops; edge-sensitive, not level-sensitive. |
| 16 | VCC | Power supply input - Requires local 0.1 µF bypass capacitor; supports wide-voltage operation from 1.5V to 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple D-type with Clear | Four independent flip-flops share one CLK and one CLR - reduces component count in multi-bit register designs vs. discrete single-bit ICs. |
| Double-rail Outputs | True and complement outputs per stage - enables direct connection to differential receivers or XOR-based feedback paths without added logic. |
| Balanced Propagation Delays | tPLH ≈ tPHL across all outputs and supply voltages - ensures minimal skew between Q and Q̅ transitions, critical for glitch-free state machines. |
| SCR-Latchup Resistant Process | CMOS fabrication with latchup immunity per JEDEC JESD78 - prevents destructive parasitic thyristor activation under transient overvoltage or ESD stress. |
| Buffered Inputs | High-impedance, noise-immune inputs with 30% supply noise margin - rejects coupled transients on CLK and CLR lines in noisy mixed-signal PCBs. |
Applications
| Buffer/Storage Registers | Shift Registers |
|---|---|
Use Scenario: Storing parallel data from ADC interfaces or microcontroller GPIO buses before serial transmission. IC Role / Device Role / Timing Role: Synchronous data latch holding 4-bit words on rising CLK edge; CLR enables synchronized reset across all channels. Use Value: Complementary outputs allow simultaneous read of both logic states; ±24mA drive supports direct connection to 74F-series inputs without buffers. |
Use Scenario: Constructing 16-bit serial-in/parallel-out shift registers using cascaded CD74AC175NSRE4 units. IC Role / Device Role / Timing Role: Four-bit stage in multi-chip shift chain; Q outputs feed next stage's D inputs; CLK and CLR routed in parallel. Use Value: Matched tPLH/tPHL minimizes inter-stage skew; wide VCC range allows operation from same rail as microcontroller (3.3V or 5V). |
| Pattern Generators | State Machine Registers |
Use Scenario: Generating fixed test sequences (e.g., PRBS subsets or address strobes) in ATE or FPGA configuration circuits. IC Role / Device Role / Timing Role: Feedback-controlled register where Q outputs drive combinational logic feeding D inputs; CLR initializes known seed state. Use Value: Low 2ns setup/hold times enable stable operation at >100 MHz; ESD-hardened I/O tolerates repeated probe contact during debug. |
Use Scenario: Holding current state bits in finite-state controllers for motor drives or protocol decoders. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing next-state values computed by PLD or gate array; CLR forces safe startup state. Use Value: –55°C to +125°C rating ensures reliability in sealed enclosures; SCR-latchup resistance prevents failure during load dump events. |
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 |
|---|---|---|---|
| SN74AC175N | Same logic function and pinout; identical AC-series specs but offered in PDIP package (not SOIC). No MSL rating or tape-and-reel packaging. | Suitable for prototyping or through-hole assembly; lacks surface-mount compatibility and industrial reflow support. | Select SN74AC175N only for breadboard evaluation or legacy through-hole production; CD74AC175NSRE4 is preferred for automated SMT lines. |
| CD74HC175M | HC-series variant: slower max frequency (25 MHz at 6V), higher propagation delay (25 ns), lower drive (±4 mA), but wider VCC range (2–6V). | Acceptable for low-speed control logic where power efficiency outweighs speed; unsuitable for >50 MHz register files. | Choose CD74HC175M only when operating above 5.5V or below 2V; CD74AC175NSRE4 delivers superior speed/power trade-off at 3.3V/5V. |
Compared with SN74AC175N and CD74HC175M, CD74AC175NSRE4 uniquely combines 114 MHz operation, ±24 mA drive, and SOIC-16 packaging with MSL-1 reflow compliance - making it optimal for high-density, high-speed, surface-mount digital register designs requiring industrial temperature support.
Availability
CD74AC175NSRE4 is available at Aetrix Electronics and suitable for industrial control panels, aerospace avionics modules, and automotive engine control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74AC175NSRE4 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 specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability logic families and broad industrial qualification.
The CD74AC175NSRE4 belongs to TI's AC-series advanced CMOS logic family, engineered for high-speed, low-power digital signal routing and storage in mission-critical systems where timing precision and robustness are essential.
FAQ
What is the maximum clock frequency supported by CD74AC175NSRE4?
The CD74AC175NSRE4 supports up to 114 MHz at VCC = 5V ± 0.5V and CL = 50 pF, as specified in Section 5.11 of its datasheet. At 3.3V, maximum frequency drops to 81 MHz. These values assume proper layout, bypassing, and load conditions - exceeding them risks setup/hold violations or metastability.
Does CD74AC175NSRE4 have true and complement outputs for each flip-flop?
Yes, CD74AC175NSRE4 provides complementary Q and Q̅ outputs for all four flip-flop stages (pins 2/3, 6/7, 10/11, 14/15). This dual-rail capability eliminates the need for external inverters in applications requiring both logic states, such as differential bus drivers or XOR-based feedback loops.
What is the recommended bypass capacitor for CD74AC175NSRE4?
Texas Instruments recommends a 0.1 µF ceramic capacitor placed as close as possible to the VCC (pin 16) and GND (pin 8) terminals of CD74AC175NSRE4. For systems with multiple power rails or high-frequency noise, paralleling a 1 µF capacitor improves low-frequency decoupling while maintaining high-frequency suppression.
Is CD74AC175NSRE4 compatible with 1.8V logic systems?
Yes, CD74AC175NSRE4 operates down to 1.5V, making it fully compatible with 1.8V logic systems. At 1.8V, its maximum clock frequency is 114 MHz (per Section 5.6), and input thresholds scale proportionally (VIH = 1.2V, VIL = 0.3V), ensuring interoperability with standard 1.8V CMOS drivers and receivers.
What does the 'NSRE4' suffix indicate in CD74AC175NSRE4?
The 'NSRE4' suffix denotes a specific packaging and environmental configuration: NS = SOIC-16 package, R = tape-and-reel packaging, E4 = RoHS-compliant, lead-free finish (NiPdAu), and MSL Level-1 rating. This matches TI's orderable part CD74AC175M96, confirming full production status and industrial reflow suitability.
CD74AC175NSRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 16-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Clock Frequency:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 12.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
CD74AC175NSRE4 FAQ
1.How can I place an order for CD74AC175NSRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC175NSRE4 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 CD74AC175NSRE4 reliable?
The price and inventory of CD74AC175NSRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC175NSRE4 is usually 5 days.
3.What payment methods are accepted for CD74AC175NSRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC175NSRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74AC175NSRE4?
CD74AC175NSRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC175NSRE4 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 CD74AC175NSRE4?
For technical support, including CD74AC175NSRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC175NSRE4 requirements.
6.How does Aetrix verify that CD74AC175NSRE4 is sourced from the original manufacturer or authorized distributors?
All CD74AC175NSRE4 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 CD74AC175NSRE4 meets industry standards.
7.What is the process for return or replacement of CD74AC175NSRE4?
All CD74AC175NSRE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC175NSRE4, 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 CD74AC175NSRE4 part is unused and in its original packaging.
Return procedure for CD74AC175NSRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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