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onsemi MC74HC175ADT
- Part No.:
- MC74HC175ADT
- Manufacturer:
- onsemi
- Category:
- Flip Flops
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74HC175ADT.pdf
- Description:
- IC FF D-TYPE SNGL 4BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:19,200
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Product details
Overview
MC74HC175ADT from onsemi is a quad D-type flip-flop IC with common asynchronous reset (active-low) and shared clock input, delivering 4 independent data storage elements in a single TSSOP-16 package. It operates across 2–6 V supply, supports 10 LSTTL loads, and features propagation delays as low as 22 ns at 6 V - enabling reliable edge-triggered latching in digital control logic, state machines, and bus interface circuits.
For engineers reviewing the MC74HC175ADT datasheet, pinout, applications, or equivalent options, key selection considerations include its TSSOP-16 footprint, 125°C max operating temperature, guaranteed setup/hold timing (17–30 ns), dual Q/Q outputs per stage, and JEDEC Std. 7A compliance for industrial-grade logic interfacing.
Technical Context
The MC74HC175ADT implements four edge-triggered D flip-flops sharing one clock and one active-low asynchronous reset line, with separate D inputs and complementary Q/Q outputs per stage. Its silicon-gate CMOS architecture ensures compatibility with both CMOS and LSTTL logic families when pullup resistors are used on inputs.
Timing behavior is defined by strict AC parameters: minimum clock pulse width (14 ns at 6 V), recovery time from reset (17 ns), and maximum clock frequency of 35 MHz at 6 V with 50 pF load. All DC electrical characteristics - including VIH/VIL thresholds, VOL/VOH levels, and input leakage (<1 µA) - are fully specified across –55°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic systems without level shifters. |
| Max Clock Frequency | 35 MHz at VCC = 6 V - supports high-speed synchronous data capture in control registers and pipeline stages. |
| Propagation Delay (CLK→Q) | 22 ns at VCC = 6 V - ensures predictable timing margins in multi-stage sequential logic designs. |
| Output Drive | 10 LSTTL loads - provides sufficient fanout for driving multiple downstream TTL or CMOS inputs. |
| Operating Temperature | –55°C to +125°C - qualified for automotive under-hood, industrial PLC, and aerospace avionics applications. |
| Input Leakage Current | ±1.0 µA max at 6 V - minimizes static power draw and prevents unintended logic transitions in battery-powered systems. |
| Quiescent Supply Current | 160 µA max at 125°C - maintains low standby power in always-on control subsystems. |
Pinout & Package
TSSOP-16 package (Case 948F), 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, exposed pad optional - optimized for space-constrained PCB layouts and automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | D0 | Data input for first flip-flop - sampled on rising clock edge and transferred to Q0/Q0. |
| 2 | Q0 | True output of first flip-flop - reflects stored D0 value after clock edge. |
| 3 | Q0 | Inverted output of first flip-flop - complements Q0, useful for differential signaling or feedback paths. |
| 4 | D1 | Data input for second flip-flop - independent of other D inputs but shares clock/reset. |
| 5 | D2 | Data input for third flip-flop - enables parallel loading of 4-bit words with single clock event. |
| 6 | Q1 | True output of second flip-flop - synchronized to same clock domain as all other Q outputs. |
| 7 | Q1 | Inverted output of second flip-flop - supports complementary latch configurations without external inverters. |
| 8 | GND | Ground reference for all internal circuitry and I/O - must be low-impedance connection to minimize noise coupling. |
| 9 | D3 | Data input for fourth flip-flop - completes 4-bit parallel data path for register file or status storage. |
| 10 | Q2 | True output of third flip-flop - maintains deterministic phase relationship with clock and reset signals. |
| 11 | Q2 | Inverted output of third flip-flop - allows direct implementation of toggle or JK-like behavior via feedback. |
| 12 | CLOCK | Rising-edge sensitive global clock - triggers simultaneous sampling of all four D inputs. |
| 13 | RESET | Asynchronous active-low reset - forces all Q outputs low regardless of clock state, enabling system initialization. |
| 14 | Q3 | True output of fourth flip-flop - final bit of 4-bit register, suitable for status flag or counter LSB. |
| 15 | Q3 | Inverted output of fourth flip-flop - provides logical complement for error detection or parity generation. |
| 16 | VCC | Positive supply rail - powers internal logic and output drivers; requires local 0.1 µF decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Quad D Flip-Flop with Common Control | Single-clock, single-reset architecture reduces control signal routing complexity in 4-bit register implementations. |
| CMOS + LSTTL Input Compatibility | Pullup resistor support enables direct connection to legacy TTL outputs without additional interface logic. |
| JEDEC Std. 7A Compliance | Guarantees interoperability with industry-standard high-speed CMOS logic families across voltage and temperature ranges. |
| Low Input Current (≤1 µA) | Minimizes loading on upstream drivers and preserves signal integrity in high-fanout bus structures. |
| Complementary Q/Q Outputs | Eliminates need for external inverters in applications requiring both true and inverted latch states. |
Applications
| Industrial PLC I/O Register | Automotive Body Control Module |
|---|---|
Use Scenario: Storing 4-bit sensor status flags (e.g., door open/closed, seatbelt fastened, trunk latch, hood position) in a microcontroller-peripheral interface. IC Role / Device Role / Timing Role: MC74HC175ADT acts as a synchronous input latch, capturing parallel status bits on each MCU clock cycle while providing glitch-free Q/Q outputs for diagnostics. Use Value: Enables deterministic sampling of mechanical switch inputs with noise immunity up to 40% of VCC, reducing firmware debounce overhead. | Use Scenario: Holding 4-bit configuration data (e.g., headlight mode, wiper speed, mirror fold setting, climate zone enable) during MCU reset or brown-out events. IC Role / Device Role / Timing Role: MC74HC175ADT serves as a non-volatile shadow register, retaining user settings via external hold circuitry until MCU reinitializes. Use Value: Maintains functional safety-critical settings across power cycles without EEPROM wear or write latency. |
| Test Equipment Pattern Generator | Medical Infusion Pump Controller |
Use Scenario: Generating precise 4-bit test vectors for digital ASIC validation, where each bit controls a separate stimulus channel. IC Role / Device Role / Timing Role: MC74HC175ADT functions as a programmable pattern register, updated synchronously via SPI-to-parallel bridge and clocked at up to 35 MHz. Use Value: Delivers sub-30 ns timing resolution between vector changes, meeting IEEE 1149.1 boundary-scan timing requirements. | Use Scenario: Latching 4-bit dosage rate commands from a safety-certified microcontroller into motor driver enable logic. IC Role / Device Role / Timing Role: MC74HC175ADT operates as a fail-safe interlock register, with RESET tied to hardware watchdog timeout to force zero-output state on fault. Use Value: Provides ASIL-B compliant hardware-enforced shutdown path independent of software execution flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad D flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC175PW | TSSOP-16 package, identical pinout and AC/DC specs; TI characterization uses different test conditions for tPLH/tPHL (25°C only). | Qualified to AEC-Q100 Grade 2 (–40°C to +105°C); lacks full –55°C to +125°C rating of MC74HC175ADT. | Select SN74HC175PW for cost-sensitive consumer designs where extended temperature range is not required. |
| 74HC175D,653 | SO-16 package (not TSSOP); same logic function and voltage specs, but 1.75 mm height vs. 1.1 mm for MC74HC175ADT. | Higher thermal resistance (500 mW max vs. 450 mW) and larger PCB footprint limit use in ultra-thin portable medical devices. | Choose 74HC175D,653 only if existing SO-16 layout reuse is mandatory and board height constraints allow. |
Compared with SN74HC175PW and 74HC175D,653, the MC74HC175ADT offers superior thermal performance in compact form factor, full military-grade temperature qualification, and tighter AC parameter guarantees across the entire operating range - making it optimal for high-reliability embedded control where timing predictability and environmental robustness are critical.
Availability
MC74HC175ADT is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MC74HC175ADT 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
onsemi is a global semiconductor supplier focused on energy-efficient technologies for automotive, industrial, cloud, medical, and IoT applications, with leadership in high-performance analog, logic, and discrete solutions.
The MC74HC175ADT belongs to onsemi's HC logic family - designed specifically for low-power, high-noise-immunity digital control in harsh environments where reliability across wide voltage and temperature ranges is essential.
FAQ
What is the maximum clock frequency supported by the MC74HC175ADT?
The MC74HC175ADT supports a maximum clock frequency of 35 MHz when operated at VCC = 6.0 V with a 50 pF load and input rise/fall times ≤6 ns. At lower supply voltages, the maximum frequency decreases - e.g., 30 MHz at 4.5 V, 10 MHz at 3.0 V, and 6 MHz at 2.0 V - as specified in the AC Electrical Characteristics table of the official datasheet.
Does the MC74HC175ADT have built-in ESD protection?
Yes, the MC74HC175ADT contains internal protection circuitry to guard against damage from high static voltages or electric fields. However, the device is not rated for human-body-model (HBM) or machine-model (MM) ESD testing per ANSI/ESDA standards, and external handling precautions - such as grounded workstations and anti-static packaging - remain mandatory during assembly and testing of the MC74HC175ADT.
Can unused inputs on the MC74HC175ADT be left floating?
No, unused inputs on the MC74HC175ADT must never be left floating. The datasheet explicitly requires all unused inputs to be tied to a valid logic level - either VCC or GND - to prevent unpredictable switching, increased power consumption, or potential latch-up. Leaving inputs unconnected risks metastability and violates the recommended operating conditions for the MC74HC175ADT.
Is the MC74HC175ADT pin-compatible with the older LS175 TTL device?
Yes, the MC74HC175ADT is explicitly designed to be pinout-compatible with the 74LS175 TTL quad D flip-flop, allowing direct replacement in existing LS-based designs. However, due to differences in drive strength, input thresholds, and timing, system-level verification - especially of setup/hold margins and fanout loading - is required before substituting the MC74HC175ADT into an LS175 layout.
What is the purpose of the complementary Q and Q outputs on each flip-flop in the MC74HC175ADT?
The complementary Q and Q outputs on each of the four flip-flops in the MC74HC175ADT provide both true and inverted logic states simultaneously, eliminating the need for external inverters in applications such as toggle-mode counters, JK emulation, parity generation, or differential bus driving. This feature directly reduces component count and PCB area in designs relying on dual-rail logic signaling, and is intrinsic to the MC74HC175ADT's architecture.
MC74HC175ADT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Clock Frequency:
- 35 MHz
- Max Propagation Delay @ V, Max CL:
- 22ns @ 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:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
MC74HC175ADT FAQ
1.How can I place an order for MC74HC175ADT through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC175ADT 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 MC74HC175ADT reliable?
The price and inventory of MC74HC175ADT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC175ADT is usually 5 days.
3.What payment methods are accepted for MC74HC175ADT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC175ADT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC175ADT?
MC74HC175ADT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC175ADT 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 MC74HC175ADT?
For technical support, including MC74HC175ADT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC175ADT requirements.
6.How does Aetrix verify that MC74HC175ADT is sourced from the original manufacturer or authorized distributors?
All MC74HC175ADT 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 MC74HC175ADT meets industry standards.
7.What is the process for return or replacement of MC74HC175ADT?
All MC74HC175ADT units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC175ADT, 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 MC74HC175ADT part is unused and in its original packaging.
Return procedure for MC74HC175ADT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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