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onsemi MC14174BD
- Part No.:
- MC14174BD
- Manufacturer:
- onsemi
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC14174BD.pdf
- Description:
- D FLIP-FLOP, 6-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:8,300
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Product details
Overview
MC14174BD from onsemi is a hex D-type flip-flop IC built with CMOS P- and N-channel enhancement-mode devices in a monolithic structure. It features six edge-triggered D flip-flops sharing common clock and active-low reset inputs, operates from 3.0 V to 18 V, delivers ±4.2 mA output drive at 15 V, and supports positive-edge clocking with 15 ns minimum clock pulse width at 15 V for industrial timing and data latching applications.
For engineers reviewing the MC14174BD datasheet, pinout, applications, or equivalent options, this device serves as a high-voltage-tolerant, static CMOS alternative to TTL 74174 in legacy control logic, register banks, and synchronous state-holding circuits where wide supply range and diode-protected inputs are required.
Technical Context
The MC14174BD implements six independent D flip-flops with fully buffered inputs and outputs, enabling robust noise immunity and direct interfacing with TTL loads. Its reset is asynchronous and active-low, independent of clock timing, ensuring deterministic initialization across all six stages.
Each flip-flop transfers data from D to Q on the rising edge of the clock signal, requiring a minimum setup time of 15 ns and hold time of 30 ns at 15 V. Propagation delay from clock-to-Q is 65 ns (typ) at 15 V with 50 pF load, while reset-to-Q delay is 75 ns (typ), supporting reliable synchronization in mixed-voltage digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 18 V DC - enables operation across legacy 5 V, modern 12 V, and high-voltage industrial rails without level shifting. |
| Logic Family | CMOS - provides static operation, low quiescent current (≤600 µA at 15 V), and high input impedance. |
| Output Drive Capability | ±4.2 mA sink/source at 15 V - sufficient to drive two low-power TTL loads or one low-power Schottky TTL load over full temperature range. |
| Clock Input Type | Positive-edge triggered - requires clean rising-edge transitions; minimum pulse width 70 ns at 15 V ensures reliable sampling. |
| Reset Function | Asynchronous, active-low - forces all Q outputs low independently of clock, enabling immediate system-wide initialization. |
| Input Protection | Diode-protected inputs - withstands transient overvoltage up to VDD + 0.5 V and down to −0.5 V, enhancing field reliability. |
| Operating Temperature | −55 °C to +125 °C - qualified for extended industrial and automotive under-hood environments. |
Pinout & Package
MC14174BD is housed in a 16-pin SOIC package (Case 751B), with 1.27 mm pitch, 10.0 mm × 4.0 mm body dimensions, and Pb-free/RoHS-compliant construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | D0 | Data input for first flip-flop; must meet 15 ns setup/30 ns hold at 15 V before clock edge. |
| 2 | D1 | Data input for second flip-flop; electrically identical to D0 with shared clock/reset. |
| 3 | D2 | Data input for third flip-flop; part of unified 6-bit parallel data path. |
| 4 | D3 | Data input for fourth flip-flop; no internal cross-coupling between D inputs. |
| 5 | D4 | Data input for fifth flip-flop; each D input drives only its corresponding Q output. |
| 6 | D5 | Data input for sixth flip-flop; all six D inputs are individually controllable. |
| 7 | VSS | Ground reference (0 V); mandatory return path for all internal logic and I/O currents. |
| 8 | Q0 | Complementary output of first flip-flop; high-impedance when unused but must not be shorted. |
| 9 | Q1 | Complementary output of second flip-flop; buffered output capable of driving TTL loads directly. |
| 10 | Q2 | Complementary output of third flip-flop; shares same electrical specs as Q0–Q5. |
| 11 | Q3 | Complementary output of fourth flip-flop; VOH = 14.95 V, VOL = 0.05 V at 15 V supply. |
| 12 | Q4 | Complementary output of fifth flip-flop; output voltage swing spans nearly full VDD–VSS range. |
| 13 | Q5 | Complementary output of sixth flip-flop; no internal feedback or latch-up risk between outputs. |
| 14 | R | Active-low asynchronous reset; pulls all Q outputs low regardless of clock state or timing. |
| 15 | C | Positive-edge clock input; triggers simultaneous update of all six Q outputs on rising transition. |
| 16 | VDD | Positive supply rail; must be decoupled locally with ≥0.1 µF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range (3.0–18 V) | Eliminates need for separate voltage regulators in multi-rail systems and supports direct battery-powered operation. |
| Static CMOS Operation | Enables zero static power consumption during hold states, critical for low-duty-cycle control logic. |
| Diode-Protected Inputs | Prevents latch-up and damage from ESD or transient overvoltage without external clamping components. |
| Functional Equivalence to 74174 | Allows drop-in replacement in legacy TTL designs while improving noise margin and reducing supply current. |
| Pb-Free / RoHS Compliant | Meets global environmental compliance requirements for industrial and commercial manufacturing. |
Applications
| Industrial Control Logic | Legacy System Register Bank |
|---|---|
|
Use Scenario: Latching sensor status bits in programmable logic controllers operating from 12 V DC rails with ambient temperatures up to 85 °C. IC Role / Device Role / Timing Role: Hex D flip-flop providing synchronized storage of six discrete input signals with common clock and reset. Use Value: Single-package solution reduces PCB area vs. discrete latches; 18 V tolerance avoids external regulators in 12 V industrial supplies. |
Use Scenario: Replacing obsolete 74174 TTL registers in retrofitted test equipment using 5 V logic but requiring lower power and higher noise immunity. IC Role / Device Role / Timing Role: Pin-compatible CMOS upgrade delivering identical functionality with 90% lower quiescent current and rail-to-rail output swing. Use Value: Enables longer battery life in portable testers and eliminates thermal derating concerns in dense board layouts. |
| Automotive Body Controller | High-Voltage Data Acquisition Interface |
|
Use Scenario: Capturing switch closure events (e.g., door open/close, seat position) in 12 V automotive body control modules with −40 °C to +105 °C operation. IC Role / Device Role / Timing Role: Synchronizing six mechanical switch inputs to microcontroller clock domain while rejecting contact bounce via controlled setup/hold timing. Use Value: Diode-protected inputs tolerate load-dump transients; wide temperature range eliminates need for external thermal compensation. |
Use Scenario: Isolating and buffering analog multiplexer address lines in 15 V data acquisition systems handling ±10 V sensor signals. IC Role / Device Role / Timing Role: Level-shifting and latching 6-bit address bus between low-voltage controller and high-voltage analog front-end. Use Value: 15 V-rated outputs drive high-impedance analog switches directly; no level translators required between domains. |
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 |
|---|---|---|---|
| CD40174BE | Same 16-pin PDIP package, identical 3–18 V supply range, but slower max clock frequency (6.5 MHz vs. 15.5 MHz at 15 V). | Preferred for cost-sensitive through-hole designs where speed < 7 MHz suffices and SOIC footprint is not required. | Select CD40174BE when board space allows PDIP and timing budget permits 50% lower clock rate. |
| SN74AC174N | Narrower 2–6 V supply range, faster propagation (11 ns typ), but lacks diode protection and −55 °C rating. | Suitable for modern 3.3 V/5 V systems needing higher speed and lower capacitance, but not for harsh environments. | Choose SN74AC174N only in benign commercial environments with tight timing constraints and no voltage transients. |
Compared with CD40174BE and SN74AC174N, MC14174BD uniquely combines extended temperature operation (−55 °C to +125 °C), integrated input protection, and 15.5 MHz maximum clock rate at 15 V - making it the sole option for ruggedized, wide-supply, high-reliability D-latch applications.
Availability
MC14174BD is available at Aetrix Electronics and suitable for industrial control logic, legacy system register banks, automotive body controllers, and high-voltage data acquisition interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for MC14174BD 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 (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The MC14174BD belongs to onsemi's legacy CMOS logic product line, designed specifically for high-voltage, high-reliability digital interfacing and data latching in demanding industrial and automotive environments.
FAQ
What is the maximum clock frequency supported by the MC14174BD?
The MC14174BD supports a maximum clock frequency of 15.5 MHz at VDD = 15 V, 12 MHz at VDD = 10 V, and 7.0 MHz at VDD = 5.0 V, as specified in the switching characteristics table. These values assume CL = 50 pF and TA = 25 °C; derating applies at temperature extremes or higher capacitive loads. The MC14174BD's clock timing is validated across its full −55 °C to +125 °C operating range.
Is the MC14174BD pin-compatible with the TTL 74174?
Yes, the MC14174BD is functionally and pin-compatible with the 74174 TTL hex D flip-flop, sharing identical pin assignments for D0–D5, Q0–Q5, clock (C), reset (R), VDD, and VSS. This allows direct replacement in existing 74174-based designs, delivering improved noise immunity, wider supply range, and lower power consumption without PCB modification.
Does the MC14174BD require external pull-up or pull-down resistors on unused inputs?
Yes, unused inputs on the MC14174BD must be tied to a valid logic level - either VDD or VSS - to prevent floating nodes that could cause excessive supply current or erratic behavior. The datasheet explicitly states "Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD)"; leaving them unconnected violates recommended operating conditions.
What is the output drive capability of the MC14174BD at 12 V supply?
At VDD = 12 V, the MC14174BD delivers a minimum sink current (IOL) of 3.4 mA and source current (IOH) of −1.3 mA into a standard TTL load, per the Electrical Characteristics table. This meets the requirement to drive two low-power TTL loads or one low-power Schottky TTL load across the full −55 °C to +125 °C temperature range, confirming robust interoperability with legacy TTL circuitry.
Can the MC14174BD operate reliably at −55 °C?
Yes, the MC14174BD is fully specified and tested for operation from −55 °C to +125 °C, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. All key parameters - including VOL, VOH, tPLH/tPHL, and IOL/IOH - are guaranteed across this extended range, making the MC14174BD suitable for aerospace, military, and extreme-environment industrial applications where cold-start reliability is critical.
MC14174BD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Clock Frequency:
- 15.5 MHz
- Max Propagation Delay @ V, Max CL:
- 120ns @ 15V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8.8mA, 8.8mA
- Voltage - Supply:
- 3V ~ 18V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MC14174BD FAQ
1.How can I place an order for MC14174BD through Aetrix?
Please submit a Request for Quotation (RFQ) for MC14174BD 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 MC14174BD reliable?
The price and inventory of MC14174BD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC14174BD is usually 5 days.
3.What payment methods are accepted for MC14174BD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC14174BD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC14174BD?
MC14174BD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC14174BD 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 MC14174BD?
For technical support, including MC14174BD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC14174BD requirements.
6.How does Aetrix verify that MC14174BD is sourced from the original manufacturer or authorized distributors?
All MC14174BD 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 MC14174BD meets industry standards.
7.What is the process for return or replacement of MC14174BD?
All MC14174BD units undergo pre-shipment inspection (PSI). If there is an issue with MC14174BD, 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 MC14174BD part is unused and in its original packaging.
Return procedure for MC14174BD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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