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Nexperia USA Inc. 74HCT174DB,112
- Part No.:
- 74HCT174DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT174DB,112.pdf
- Description:
- IC FF D-TYPE SNGL 6BIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,132
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Product details
Overview
74HCT174DB,112 from Nexperia is a hex positive-edge-triggered D-type flip-flop with asynchronous master reset, operating at 4.5 V to 5.5 V supply, delivering 35 ns typical propagation delay (CP to Q) at 4.5 V, and supporting industrial temperature range (−40 °C to +125 °C). It functions as a synchronous data latch in digital control logic, clock distribution, and state register stages of microcontroller peripherals and industrial PLC I/O modules.
For engineers reviewing the 74HCT174DB,112 datasheet, 74HCT174DB,112 pinout, 74HCT174DB,112 application, or 74HCT174DB,112 equivalent, this page provides verified pin roles, TTL-compatible input thresholds, SO16 package details, timing parameters under 50 pF load, and validated alternatives for logic-level translation and register consolidation in legacy 5 V systems.
Technical Context
This device implements six independent edge-triggered D-type latches sharing one common clock (CP) and one active-low asynchronous master reset (MR), enabling simultaneous loading or clearing of all six outputs (Q0–Q5) on the LOW-to-HIGH transition of CP. Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It conforms to JEDEC JESD7A (2.0 V–6.0 V) and JESD8C (2.7 V–3.6 V) standards, supports 100 mA latch-up immunity per JESD78 Class II Level B, and features TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.0 V), distinguishing it from the CMOS-input 74HC174 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL logic rails and stable operation across industrial voltage tolerances. |
| Propagation Delay (CP to Q) | 21 ns (typ) at 4.5 V, CL = 50 pF - Enables reliable 30 MHz maximum clock frequency in synchronous register chains. |
| Input Thresholds (TTL) | VIH ≥ 2.0 V, VIL ≤ 0.8 V - Guarantees direct interface with legacy 74LS/74ALS outputs without level-shifting. |
| Output Drive Strength | ±4.0 mA (VOH/VOL) - Sufficient to drive 10 LS-TTL loads or two 74HCT inputs under worst-case conditions. |
| Operating Temperature | −40 °C to +125 °C - Qualified for extended-temperature industrial control, motor drives, and power supply monitoring circuits. |
| Power Dissipation Capacitance | 17 pF - Used to calculate dynamic power: PD = 17 × VCC² × fIN + Σ(CL × VCC² × fOUT). |
| Set-up / Hold Time | tsu = 16 ns, th = 5 ns at 4.5 V - Defines minimum data stability window before and after CP edge for deterministic capture. |
Pinout & Package
74HCT174DB,112 is housed in a plastic small outline package (SO16) per SOT109-1, with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; the package is RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Asynchronous master reset input | Active-LOW signal that forces all Qn outputs to logic LOW regardless of clock state; requires pull-up for normal operation. |
| 2 (Q0) | Flip-flop output 0 | Complementary to D0 at next valid CP edge; electrically isolated from other Q pins except via shared VCC/GND. |
| 3 (D0) | Data input 0 | Stores logic level at rising edge of CP if set-up/hold times are met; clamped to prevent overvoltage damage. |
| 4 (D1) | Data input 1 | Independent data path for second register stage; shares same timing constraints as D0–D5. |
| 6 (D2) | Data input 2 | Third parallel data input; routed internally to FF3 with identical propagation characteristics. |
| 9 (CP) | Common clock input | Positive-edge-triggered control signal synchronizing all six flip-flops; must meet specified rise/fall rate (≥1.67 ns/V at 4.5 V). |
| 10 (Q1) | Flip-flop output 1 | Output corresponding to D1; phase-aligned with Q0–Q5 but not guaranteed to switch simultaneously due to internal routing skew. |
| 11 (D3) | Data input 3 | Fourth data input; electrically identical to D0–D2 and D4–D5 in DC and AC specs. |
| 12 (Q2) | Flip-flop output 2 | Output for third register bit; referenced to GND and VCC for noise margin calculation. |
| 13 (D4) | Data input 4 | Fifth data input; supports full 6-bit parallel load capability when combined with D0–D3 and D5. |
| 14 (D5) | Data input 5 | Sixth and final data input; completes hex register functionality for byte-wide or nibble-aligned storage. |
| 15 (Q3) | Flip-flop output 3 | Output for fourth register bit; usable as feedback source in counters or shift registers. |
| 16 (VCC) | Positive supply voltage | Primary power rail; decoupling capacitor (100 nF ceramic) required within 10 mm of pin for stable switching performance. |
| 8 (GND) | Ground reference | Return path for all internal currents; must be low-impedance and tied directly to system ground plane. |
| 5 (Q4), 7 (Q5) | Flip-flop outputs 4 and 5 | Final two register outputs; share same VOL/VOH specs and load-driving capability as Q0–Q3. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input levels | Enables plug-in replacement of 74LS174 in 5 V systems without redesigning input driver stages. |
| Asynchronous master reset | Allows immediate initialization of all six outputs to known LOW state independent of clock timing, critical for power-on reset and fault recovery. |
| Clamped inputs with current-limiting support | Permits safe connection to signals up to VCC + 0.5 V using external resistors, reducing need for discrete protection components. |
| High noise immunity (typ. 40 % VCC) | Ensures robust operation in electrically noisy industrial environments where EMI may couple onto control lines. |
| JEDEC-compliant latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B, preventing destructive latch-up during transient overvoltage events. |
Applications
| Industrial PLC I/O Expansion | Digital Power Supply Sequencing |
|---|---|
Use Scenario: Latching status bits from isolated sensor inputs into a microcontroller's parallel port. IC Role / Device Role / Timing Role: Hex D-flip-flop acting as synchronized input register, capturing six independent sensor states on a single clock edge. Use Value: Eliminates metastability risk in asynchronous signal sampling while maintaining deterministic timing alignment across all channels. |
Use Scenario: Controlling enable sequencing of multiple DC-DC converters in a multi-rail power system. IC Role / Device Role / Timing Role: Register holding power-enable states, updated only on clock edges to prevent partial turn-on of downstream rails. Use Value: Ensures strict ordering of power-up/down sequences by holding stable outputs until explicitly updated, avoiding brown-out or inrush faults. |
| Legacy Microcontroller Bus Interface | Test Equipment Pattern Generator |
Use Scenario: Extending address/data bus hold time in 8051-based systems with limited internal latch resources. IC Role / Device Role / Timing Role: Edge-triggered latch buffering address lines during memory read/write cycles. Use Value: Provides precise setup/hold timing margins (16 ns su / 5 ns h) compatible with 74LS bus drivers, ensuring reliable bus arbitration. |
Use Scenario: Generating repeatable 6-bit stimulus patterns for IC functional testing. IC Role / Device Role / Timing Role: Parallel pattern register clocked by test controller to drive DUT input pins synchronously. Use Value: Delivers sub-25 ns propagation delay consistency across all six outputs, enabling tight timing correlation between pattern bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT174D,118 | Same die, SO16 package, but with different tape-and-reel packaging code (118 vs 112); identical electrical and thermal specs. | No functional difference; used interchangeably in production where reel orientation or labeling differs. | Select based on logistics preference-both meet same JEDEC and Nexperia quality standards. |
| SN74HCT174N | Dual-in-line package (PDIP-16), wider body, higher thermal resistance (RθJA ≈ 70 °C/W vs 58 °C/W for SO16), no moisture sensitivity level rating. | Suitable for prototyping or through-hole assembly; unsuitable for high-density or reflow-soldered industrial PCBs. | Choose SN74HCT174N only for breadboard evaluation or legacy through-hole designs; avoid for volume SMT production. |
Compared with 74HCT174DB,112, the 74HCT174D,118 offers identical performance in a functionally equivalent package, while SN74HCT174N trades surface-mount reliability and thermal efficiency for manual assembly convenience-making the DB,112 optimal for automated industrial manufacturing.
Availability
74HCT174DB,112 is available at Aetrix Electronics and suitable for industrial control systems, digital power management, legacy microcontroller interfaces, and automated test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74HCT174DB,112 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
Nexperia is a global semiconductor expert headquartered in Nijmegen, Netherlands, specializing in high-volume logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.
The 74HCT174 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically to bridge TTL and CMOS logic domains in 5 V systems while maintaining low power consumption and high noise immunity.
FAQ
Is 74HCT174DB,112 pin-compatible with 74HC174 variants?
Yes-74HCT174DB,112 shares identical pinout and package (SOT109-1/SO16) with 74HC174D and 74HC174PW. However, input thresholds differ: 74HCT174 accepts TTL-level inputs (VIH ≥ 2.0 V), while 74HC174 requires CMOS-level inputs (VIH ≥ 3.15 V at VCC = 4.5 V). Swapping without verifying driver compatibility may cause logic errors.
What is the maximum clock frequency supported by 74HCT174DB,112?
At VCC = 4.5 V and CL = 50 pF, the maximum operating frequency is 30 MHz (33 ns period), derived from tpd = 35 ns (max) and tW = 20 ns (min pulse width). With reduced load (CL = 15 pF), fmax reaches 69 MHz per datasheet Table 7, but system-level timing margins must account for board trace delays and skew.
Does 74HCT174DB,112 require external pull-up resistors on MR or CP?
MR must be pulled HIGH (typically via 10 kΩ to VCC) to disable reset; leaving it floating risks unintended resets due to noise. CP does not require a pull-up-it is a driven input. However, unused D inputs should be tied HIGH or LOW to prevent floating nodes that increase ICC and noise susceptibility.
Can 74HCT174DB,112 operate at 3.3 V supply?
No-74HCT174DB,112 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH and VIL thresholds fall outside guaranteed switching ranges, and VOH drops below 2.4 V (insufficient for TTL-high recognition). For 3.3 V systems, use 74LVC174 or 74AUP174 instead.
74HCT174DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Clock Frequency:
- 69 MHz
- Max Propagation Delay @ V, Max CL:
- 35ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 5.2mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HCT174DB,112 FAQ
1.How can I place an order for 74HCT174DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT174DB,112 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 74HCT174DB,112 reliable?
The price and inventory of 74HCT174DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT174DB,112 is usually 5 days.
3.What payment methods are accepted for 74HCT174DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT174DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT174DB,112?
74HCT174DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT174DB,112 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 74HCT174DB,112?
For technical support, including 74HCT174DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT174DB,112 requirements.
6.How does Aetrix verify that 74HCT174DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT174DB,112 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 74HCT174DB,112 meets industry standards.
7.What is the process for return or replacement of 74HCT174DB,112?
All 74HCT174DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT174DB,112, 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 74HCT174DB,112 part is unused and in its original packaging.
Return procedure for 74HCT174DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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