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STMicroelectronics M74HC175B1R
- Part No.:
- M74HC175B1R
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
M74HC175B1R.pdf
- Description:
- IC FF D-TYPE SNGL 4BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:160
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Product details
Overview
M74HC175B1R from STMicroelectronics is a high-speed CMOS quad D-type flip-flop with asynchronous clear, designed for synchronous data latching in digital logic systems. It operates from 2V to 6V, delivers 16 ns typical propagation delay at 6V, supports ±4 mA output drive, and features symmetrical tPLH/tPHL timing. It is used in clocked register stages of industrial control sequencers and programmable logic interfaces.
For engineers reviewing the M74HC175B1R datasheet, M74HC175B1R pinout, M74HC175B1R application, or M74HC175B1R equivalent, key selection criteria include guaranteed 4 mA output drive at VCC = 4.5 V, asynchronous active-low CLEAR functionality, 16 ns (typ.) CLOCK-to-Q delay at 6 V, and full compatibility with standard 74-series 175 logic functions and pinout.
Technical Context
The M74HC175B1R implements four independent edge-triggered D flip-flops sharing a common CLOCK and asynchronous CLEAR input. Each stage transfers data from D to Q on the positive-going clock edge, while CLEAR forces all Q outputs low regardless of clock or D state.
It uses silicon gate C2MOS technology for low ICC (4 µA max at 25°C) and high noise immunity (VNIH/VNIL ≥ 28% VCC). Input thresholds scale with supply voltage, and output drive capability is specified down to 2 V operation with symmetrical |IOH| = IOL = 4 mA (min) at VCC = 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 2 V to 6 V - supports battery-powered and mixed-voltage logic interfacing without level shifters |
| tPD (CLOCK→Q) | 16 ns (typ.) at VCC = 6 V - enables reliable operation up to 37 MHz maximum clock frequency |
| IOL / IOH | 4 mA (min) at VCC = 4.5 V - drives standard TTL loads and multiple 74HC inputs directly |
| ICC (Quiescent) | 4 µA (max) at TA = 25°C - suitable for low-power standby modes in portable systems |
| VIH / VIL | 3.15 V / 1.35 V (min/max) at VCC = 4.5 V - ensures robust noise margin across temperature |
| Propagation Balance | tPLH ≅ tPHL - minimizes skew in parallel data paths for synchronous bus applications |
Pinout & Package
Package: Plastic DIP-16 (0.300 inch width), JEDEC MS-001, body dimensions 20.0 × 8.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLEAR | Asynchronous active-low reset - overrides clock and D inputs to force Q = L, Q̅ = H |
| 2, 7, 10, 15 | 1Q to 4Q | True outputs - latch and hold D-input state on rising clock edge |
| 3, 6, 11, 14 | 1Q̅ to 4Q̅ | Complementary outputs - provide inverted latched data for differential routing or feedback |
| 4, 5, 12, 13 | 1D to 4D | Data inputs - sampled only on rising clock edge; unaffected by CLEAR until next clock |
| 8 | GND | Ground reference - must be low-impedance return path for all switching currents |
| 9 | CLOCK | Edge-triggered input - rising edge initiates synchronous transfer; no internal debouncing |
| 16 | VCC | Positive supply - powers all four flip-flops and internal logic; decoupling required per pin |
Key Features
| Feature | Design Value |
|---|---|
| Pin & function compatibility with 74LS175 | Enables drop-in replacement in legacy TTL designs without PCB redesign |
| Asynchronous master clear | Allows system-wide initialization independent of clock timing or data state |
| High noise immunity (≥28% VCC) | Reduces susceptibility to EMI-induced glitches in industrial environments |
| Wide voltage range (2–6 V) | Supports direct interface with 3.3 V microcontrollers and 5 V peripherals |
Applications
| Industrial PLC Register Bank | Digital Test Equipment Pattern Generator |
|---|---|
Use Scenario: Storing 4-bit status flags (e.g., fault codes, mode bits) in ladder-logic execution cycles. IC Role / Device Role / Timing Role: Synchronous data latch synchronized to PLC scan clock; CLEAR resets all flags on power-up or fault recovery. Use Value: Guaranteed 16 ns propagation ensures deterministic timing within 100 µs scan intervals; 4 mA drive sustains fan-out to multiple downstream comparators. | Use Scenario: Generating repeatable 4-bit stimulus vectors for IC functional testing under controlled clock rates. IC Role / Device Role / Timing Role: Edge-triggered pattern register holding test vector bits; CLEAR initializes known state before each test sequence. Use Value: Balanced tPLH/tPHL eliminates setup/hold violations across parallel bit lines; 2–6 V operation allows direct use with 3.3 V ATE controllers. |
| Legacy System TTL-to-CMOS Migration | Low-Power Sensor Interface Logic |
Use Scenario: Replacing obsolete 74LS175 in field-deployed instrumentation with extended temperature support. IC Role / Device Role / Timing Role: Pin-compatible D-flip-flop providing identical logic function but lower power and higher noise margin. Use Value: 4 µA quiescent current reduces thermal load in sealed enclosures; 125°C max operating temperature exceeds LS-series limits. | Use Scenario: Capturing 4-channel analog sensor digitization results (e.g., ADC outputs) for microcontroller polling. IC Role / Device Role / Timing Role: Low-power data latch holding conversion results until MCU reads via parallel bus. Use Value: 2 V minimum VCC enables operation from coin-cell or energy-harvesting sources; 10 pF input capacitance minimizes loading on high-Z sensor outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad D-type flip-flop with clear applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC175N | Same logic function, 16-pin PDIP package; slightly higher ICC (8 µA max) and lower fMAX (30 MHz at 6 V) | Identical pinout and AC specs; qualified for commercial temp only (0–70°C) | Select when cost sensitivity outweighs extended temperature or ultra-low ICC requirements |
| CD74HC175E | Same logic and pinout; wider operating range (–55°C to 125°C) but higher tPD (20 ns typ. at 6 V) | Higher propagation delay impacts max clock rate in high-speed sequencers | Prefer for aerospace/military applications where extended temp range is mandatory over speed |
Compared with SN74HC175N and CD74HC175E, the M74HC175B1R offers the lowest quiescent current (4 µA max) and fastest propagation (16 ns typ.), making it optimal for battery-powered or thermally constrained industrial control nodes requiring both reliability and timing precision.
Availability
M74HC175B1R is available at Aetrix Electronics and suitable for industrial PLC register banks, digital test equipment pattern generators, and legacy TTL-to-CMOS migration projects requiring stable component supply across extended temperature ranges.
Supply support for M74HC175B1R 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with broad analog, digital, and mixed-signal product portfolios.
The M74HC175B1R belongs to ST's high-speed HC logic family, engineered for pin-compatible upgrades of legacy 74-series devices while delivering lower power, higher noise immunity, and extended temperature operation for industrial control and instrumentation.
FAQ
Is M74HC175B1R compatible with 5 V TTL logic levels?
Yes - its VIH (3.15 V min) and VOL (0.26 V max at 4 mA) meet TTL input and output voltage thresholds at VCC = 5 V, enabling direct interface with 74LS and 74F families without level-shifting circuitry.
What is the minimum pulse width required on the CLEAR input?
The minimum CLEAR pulse width is 6 ns at VCC = 6 V (13 ns at 4.5 V, 28 ns at 2 V), verified across –55°C to 125°C. This ensures reliable asynchronous reset even in fast-clocked systems with short glitch windows.
Does M74HC175B1R require external pull-up resistors on unused inputs?
No - all inputs include integrated protection diodes and have defined logic thresholds. Unused inputs must be tied HIGH or LOW to prevent floating states that increase ICC and cause unpredictable outputs; no external pull-ups are needed for static biasing.
Can M74HC175B1R operate reliably at 2.0 V supply?
Yes - it is fully characterized from 2.0 V to 6.0 V, with guaranteed tPD ≤ 225 ns, fMAX ≥ 4.2 MHz, and VIH/VIL margins maintained at 2 V. However, output drive drops to 20 µA (not 4 mA), so fan-out is limited to high-impedance CMOS loads only at this voltage.
M74HC175B1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 16-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:
- 61 MHz
- Max Propagation Delay @ V, Max CL:
- 26ns @ 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:
- 5 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
M74HC175B1R FAQ
1.How can I place an order for M74HC175B1R through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC175B1R 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 M74HC175B1R reliable?
The price and inventory of M74HC175B1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC175B1R is usually 5 days.
3.What payment methods are accepted for M74HC175B1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC175B1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC175B1R?
M74HC175B1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC175B1R 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 M74HC175B1R?
For technical support, including M74HC175B1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC175B1R requirements.
6.How does Aetrix verify that M74HC175B1R is sourced from the original manufacturer or authorized distributors?
All M74HC175B1R 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 M74HC175B1R meets industry standards.
7.What is the process for return or replacement of M74HC175B1R?
All M74HC175B1R units undergo pre-shipment inspection (PSI). If there is an issue with M74HC175B1R, 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 M74HC175B1R part is unused and in its original packaging.
Return procedure for M74HC175B1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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