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Texas Instruments CD74HCT175MG4
- Part No.:
- CD74HCT175MG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HCT175MG4.pdf
- Description:
- IC FF D-TYPE SNGL 4BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,342
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Product details
Overview
CD74HCT175MG4 from Texas Instruments is a high-speed CMOS quad D-type flip-flop with asynchronous master reset, operating at 4.5V–5.5V, featuring complementary Q/Q̅ outputs per stage, positive-edge clock triggering, and guaranteed operation from –55°C to +125°C. It drives up to 10 LSTTL loads and supports synchronous data latching in digital control, state-machine, and register applications.
For engineers reviewing the CD74HCT175MG4 datasheet, CD74HCT175MG4 pinout, CD74HCT175MG4 application, or CD74HCT175MG4 equivalent, key selection criteria include its LSTTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), 16-pin SOIC package, 25 MHz max clock frequency at 4.5 V, and deterministic asynchronous reset behavior independent of clock edge timing.
Technical Context
The CD74HCT175MG4 implements four independent edge-triggered D-type flip-flops sharing one common clock (CP) and one active-low asynchronous master reset (MR). Each stage transfers the D-input value to Q on the rising edge of CP while simultaneously asserting the inverse at Q̅.
Its HCT logic family ensures direct compatibility with legacy TTL signal levels without level-shifting, while maintaining CMOS low-power advantages and high noise immunity (NIL/NIH = 30% of VCC). Propagation delay is specified at 33 ns (typ) and 50 ns (max) from CP to Q under 50 pF load at 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HCT - TTL-compatible inputs, CMOS power efficiency, 4.5–5.5 V supply |
| Max Clock Frequency | 25 MHz at 4.5 V - supports medium-speed synchronous logic in industrial controllers |
| Propagation Delay (CP→Q) | 50 ns (max) at VCC = 4.5 V, CL = 50 pF - enables timing-critical register staging |
| Input Voltage Thresholds | VIL ≤ 0.8 V (max), VIH ≥ 2.0 V (min) - interoperable with standard 5 V TTL outputs |
| Operating Temperature | –55°C to +125°C - qualified for extended-range military, aerospace, and downhole electronics |
| Output Drive Capability | 10 LSTTL loads - sufficient for fanout to multiple downstream logic gates or small buffers |
| Reset Behavior | Asynchronous, active-low MR - forces all Q = 0 and Q̅ = 1 regardless of CP state |
Pinout & Package
CD74HCT175MG4 is supplied in a 16-pin SOIC (D) package with 1.27 mm pitch, JEDEC MS-012AC compliant, moisture sensitivity level 1 (260°C peak reflow), and tape-and-reel packaging (2500 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR (Master Reset) | Active-low asynchronous reset controlling all four flip-flops; overrides clock edge |
| 2–5, 9–12 | D0–D3 / Q0–Q3 | Four independent D inputs and true Q outputs (non-inverted) |
| 6–8, 13–15 | Q̅0–Q̅3 / CP | Complementary Q̅ outputs (inverted) and shared clock input (positive-edge sensitive) |
| 7, 14 | GND / VCC | Ground reference (Pin 7) and 4.5–5.5 V supply (Pin 14); decoupling required near pins |
Key Features
| Feature | Design Value |
|---|---|
| Common clock & reset | Simplifies control logic in multi-stage registers and counters by eliminating per-stage enable routing |
| Complementary outputs | Provides both true and inverted data per stage-reduces need for external inverters in feedback paths |
| Buffered inputs | Improves noise rejection and reduces capacitive loading impact on upstream drivers |
| LSTTL-compatible interface | Eliminates level translators when interfacing with legacy 5 V TTL microcontrollers or bus transceivers |
| Wide temperature range | Enables use in unheated outdoor enclosures, engine compartments, or space-constrained industrial sensors |
Applications
| Industrial PLC I/O Register | Digital Test Equipment Pattern Generator |
|---|---|
|
Use Scenario: Capturing parallel sensor status bits (e.g., limit switches, valve positions) synchronized to a system clock in a programmable logic controller. IC Role / Device Role / Timing Role: Quad D-type latch holding real-time I/O states; MR initializes all channels to known safe state at power-up or fault recovery. Use Value: Single-chip solution replaces four discrete DFFs, reducing PCB area and interconnect skew across four-bit data paths. |
Use Scenario: Generating deterministic 4-bit stimulus patterns for IC functional testing using a microcontroller-controlled clock source. IC Role / Device Role / Timing Role: Synchronous pattern register updating on each clock edge; Q̅ outputs feed combinational logic for test vector expansion. Use Value: Complementary outputs eliminate need for external inverters in pattern generation trees, improving timing margin and test repeatability. |
| Automotive Body Control Module | Legacy Bus Interface Logic |
|
Use Scenario: Storing door lock/unlock command states and headlight mode settings in an automotive body control unit operating across extreme ambient temperatures. IC Role / Device Role / Timing Role: Nonvolatile state retention via continuous clocking; MR asserts during ignition cycle reset to clear transient faults. Use Value: –55°C to +125°C rating ensures reliable operation in under-hood environments without derating or thermal shielding. |
Use Scenario: Interfacing a modern microcontroller GPIO port (5 V tolerant) with legacy 5 V TTL peripherals such as UART transceivers or address latches. IC Role / Device Role / Timing Role: Level-translation buffer and synchronization register; HCT inputs accept TTL voltage levels directly. Use Value: Eliminates discrete resistor networks or dedicated level shifters, lowering BOM cost and board space in retrofit designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad D-type flip-flop with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT175N | Same HCT logic family, identical pinout, but in PDIP package (16-pin N) and rated only to +70°C (commercial temp range) | Limited to non-extended temperature applications; unsuitable for automotive or military use | Select when cost-sensitive prototyping or commercial-grade systems require through-hole assembly |
| CD74HC175M96 | Same SOIC-16 package and pinout, but HC family: 2–6 V operation, higher VIH/VIL thresholds, no TTL input compatibility | Requires compatible CMOS-level drivers; not interoperable with 5 V TTL sources without level translation | Select when system uses mixed-voltage rails or requires wider supply flexibility, and TTL compatibility is unnecessary |
Compared with SN74HCT175N and CD74HC175M96, CD74HCT175MG4 uniquely combines full military-grade temperature support (–55°C to +125°C), LSTTL input compatibility, and SOIC surface-mount packaging - making it the only option among the three qualified for high-reliability embedded systems requiring both robustness and legacy interface support.
Availability
CD74HCT175MG4 is available at Aetrix Electronics and suitable for industrial automation, aerospace avionics, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HCT175MG4 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 over 50 years of innovation in high-reliability logic families.
CD74HCT175MG4 belongs to TI's CD74HCT high-speed CMOS logic series, designed specifically for drop-in replacement of legacy TTL in demanding environments where power efficiency, noise immunity, and wide temperature operation are critical.
FAQ
What is the maximum clock frequency supported by CD74HCT175MG4?
The CD74HCT175MG4 supports a maximum clock frequency of 25 MHz at VCC = 4.5 V and CL = 50 pF, dropping to 20 MHz at –40°C to +85°C and 16 MHz across the full –55°C to +125°C range. These values are measured under standard switching conditions with 6 ns input rise/fall times and reflect worst-case propagation delay limits.
Does CD74HCT175MG4 require external pull-up resistors on its inputs?
No, CD74HCT175MG4 does not require external pull-up resistors on MR, CP, or D inputs because all inputs are internally buffered with CMOS structure and have defined logic thresholds. However, floating inputs must be avoided: MR should be pulled high via ≥10 kΩ resistor if not actively driven, and unused D inputs should be tied to VCC or GND to prevent metastability.
Can CD74HCT175MG4 operate with a 3.3 V supply?
No, CD74HCT175MG4 is not rated for 3.3 V operation. Its HCT family specification mandates a supply range of 4.5 V to 5.5 V. At 3.3 V, input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) become unreliable, and output drive strength degrades significantly - use CD74HC175M96 instead for 2–6 V operation with CMOS-level compatibility.
How does the asynchronous reset (MR) behave relative to the clock in CD74HCT175MG4?
In CD74HCT175MG4, the MR pin operates asynchronously: asserting MR low immediately forces all Q outputs to logic 0 and all Q̅ outputs to logic 1, regardless of CP state or timing. The reset takes effect within tPLH/tPHL (max 53 ns at –55°C to +125°C), and release of MR restores normal clocked operation on the next rising CP edge.
Is CD74HCT175MG4 RoHS compliant and lead-free?
Yes, CD74HCT175MG4 is RoHS compliant and features lead-free (Pb-free) terminations with NiPdAu (nickel-palladium-gold) plating. Per TI's packaging documentation, it carries "NIPDAU" lead finish, meets JEDEC J-STD-020 moisture sensitivity level 1, and is qualified for Pb-free reflow up to 260°C peak temperature.
CD74HCT175MG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- 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:
- 25 MHz
- Max Propagation Delay @ V, Max CL:
- 33ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 4.5V ~ 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-SOIC
CD74HCT175MG4 FAQ
1.How can I place an order for CD74HCT175MG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT175MG4 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 CD74HCT175MG4 reliable?
The price and inventory of CD74HCT175MG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT175MG4 is usually 5 days.
3.What payment methods are accepted for CD74HCT175MG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT175MG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT175MG4?
CD74HCT175MG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT175MG4 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 CD74HCT175MG4?
For technical support, including CD74HCT175MG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT175MG4 requirements.
6.How does Aetrix verify that CD74HCT175MG4 is sourced from the original manufacturer or authorized distributors?
All CD74HCT175MG4 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 CD74HCT175MG4 meets industry standards.
7.What is the process for return or replacement of CD74HCT175MG4?
All CD74HCT175MG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT175MG4, 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 CD74HCT175MG4 part is unused and in its original packaging.
Return procedure for CD74HCT175MG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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