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HomeProductsIntegrated Circuits (ICs)Specialized ICsHCF4017BT
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HCF4017BT - Freescale / NXP Semiconductors

Manufacturer Part Number
HCF4017BT
Manufacturer
NXP Semiconductors
Allelco Part Number
32D-HCF4017BT
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
8,350 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 8350

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Specifications

HCF4017BT Tech Specifications
Freescale / NXP Semiconductors - HCF4017BT technical specifications, attributes, parameters and parts with similar specifications to Freescale / NXP Semiconductors - HCF4017BT

Product Attribute Attribute Value
Part Number HCF4017BT
Package DAC91001
Description DAC91001
Stock Condition Get 8350 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer NXP Semiconductors
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the HCF4017BT compare to other decade counter ICs in terms of maximum operating frequency and power consumption for low-voltage applications?
The HCF4017BT, a 16-pin SOP package from NXP, achieves a maximum operating frequency of up to 10 MHz at 5 V supply voltage, making it suitable for moderate-speed sequential logic designs. Its quiescent current is typically 1 µA at 5 V, which is advantageous in battery-powered or low-power systems. When compared to alternatives such as the CD4017BE (a common CMOS variant), the HCF4017BT generally offers improved noise immunity and slightly better performance at higher temperatures due to tighter manufacturing tolerances. However, newer devices like the 74HC4017 offer significantly higher speeds—up to 30–40 MHz—and lower dynamic power, making them preferable for high-frequency applications. For designs constrained by space and moderate speed, the HCF4017BT remains a viable choice where legacy compatibility or specific pinout alignment is required.
What are the key timing parameters and propagation delays associated with the HCF4017BT that influence its use in clocked sequential circuits?
The HCF4017BT exhibits a typical propagation delay of approximately 100 ns per stage under standard conditions (5 V, 25°C). This delay increases slightly with lower supply voltages and higher temperatures. The device features synchronous reset functionality via the MR (Master Reset) input, which clears all outputs when asserted high, but this operation also introduces a delay comparable to the internal gate propagation. In cascaded configurations, cumulative timing skew must be considered; for example, driving multiple stages can result in output transitions differing by up to 500 ns depending on fan-out and capacitive loading. Designers should ensure that clock rise/fall times remain below 100 ns to maintain reliable state transitions, especially when interfacing with faster microcontrollers or external oscillators.
Can the HCF4017BT drive inductive loads directly, and what precautions are necessary when using its outputs in relay control applications?
The HCF4017BT cannot safely drive inductive loads directly due to its limited output current capability (typically ±10 mA) and lack of built-in flyback protection. Inductive loads such as relays generate back-EMF when de-energized, which can damage CMOS outputs if not suppressed. To protect the HCF4017BT in relay-driving applications, a freewheeling diode must be placed across each relay coil. Additionally, a series resistor should limit inrush current during activation. A typical implementation uses a 1N4001 diode connected cathode-to-output and anode-to-ground relative to the relay coil. For higher reliability, optocouplers or buffer transistors (e.g., 2N7000 MOSFET drivers) should be inserted between the HCF4017BT outputs and the load to isolate noise and provide sufficient current gain, ensuring long-term circuit integrity.
What voltage levels and supply conditions are recommended for stable operation of the HCF4017BT, particularly in mixed-signal environments?
The HCF4017BT operates over a supply voltage range of 3 V to 15 V, allowing flexibility in system design. However, for reliable counting behavior, a minimum of 4.5 V is advised at room temperature. At 3 V, noise margins diminish significantly, increasing susceptibility to false triggering. In mixed-signal systems where digital logic swings between 3.3 V and 5 V, level-shifting may be required if interfacing with TTL-compatible inputs. The device’s input threshold levels scale with VDD: VIH(min) ≈ 0.7 × VDD and VIL(max) ≈ 0.3 × VDD. Therefore, in a 3.3 V system, the high-level input threshold rises to ~2.3 V, which may cause compatibility issues with older 5 V-tolerant logic unless buffered. Decoupling capacitors of 0.1 µF should be placed near the VDD and GND pins to suppress transient noise during switching events.
How does temperature affect the performance and reliability of the HCF4017BT, and what derating practices are recommended for industrial-grade applications?
The HCF4017BT maintains functional stability across an extended temperature range (-55°C to +125°C), though parametric drift occurs. At elevated temperatures, propagation delay increases by roughly 30–50% above 85°C, while leakage currents can double. For industrial applications requiring high reliability, a conservative operating margin is advisable. Derating guidelines suggest limiting continuous output current to ≤5 mA per pin and reducing maximum clock frequency by 10–15% above 85°C. Thermal resistance from junction to ambient in the SOP-16 package is approximately 150°C/W; thus, prolonged operation at full load without airflow may lead to thermal runaway under extreme conditions. Designers should include test points for monitoring supply current and consider using heat sinks only when multiple outputs switch simultaneously under heavy capacitive loads.
What is the significance of the enable inputs (CP0 and CP1) on the HCF4017BT, and how do they affect sequencing behavior in multi-stage counters?
The HCF4017BT includes two enable inputs—CP0 (clock enable) and CP1 (carry-out enable)—that modify counting behavior based on logic combinations. When both CP0 and CP1 are high, the device counts normally. If CP0 is high and CP1 is low, the counter holds its state regardless of CP rising edges. Conversely, if CP0 is low, counting halts entirely. The carry-out (RCBO) pin provides a pulsed signal synchronized with the 10th output, useful for cascading multiple HCF4017BTs. However, RCBO has a narrow pulse width (~100 ns) and limited sink current (~1 mA), so it should not drive large fan-out loads directly. Proper use of these enables allows flexible sequencing in applications like multiplexers or LED bar graphs, but requires careful timing alignment to avoid race conditions in asynchronous cascades.
How does the HCF4017BT handle asynchronous reset, and what initialization sequence is needed before normal operation?
The HCF4017BT employs an asynchronous master reset (MR) function that immediately clears all outputs when pulled high, independent of the clock input. To initialize the device, the MR pin must be held low during power-up, then driven high after the supply stabilizes. A recommended startup sequence involves applying VDD, waiting at least 1 ms for internal biasing to settle, holding MR low for 100 µs, then asserting MR high. This ensures that the initial state defaults to Q0 = 1 (assuming no external pull-ups), which aligns with expected counting order. Failure to properly sequence the reset can result in unpredictable starting states, especially in noisy environments. Bypassing the MR pin with a 10 kΩ resistor to ground provides automatic power-on reset, enhancing robustness in embedded systems.
What layout and PCB considerations are critical when integrating the HCF4017BT to minimize electromagnetic interference and ensure signal integrity?
Due to its CMOS construction, the HCF4017BT is sensitive to electrostatic discharge and requires careful PCB layout. Key practices include placing a 0.1 µF ceramic decoupling capacitor as close as possible to the VDD and GND pins (ideally within 5 mm). Clock traces should be kept short, shielded from high-impedance nodes, and routed away from RF sources. Ground planes beneath the IC reduce parasitic inductance and improve thermal dissipation. Avoid stubs on output lines, and use series resistors (22–100 Ω) on clock and reset lines to dampen reflections in long interconnects. In multi-board systems, twisted-pair routing for clock signals helps reject common-mode noise. These measures collectively reduce glitches and enhance immunity to EMI, particularly important in automotive or industrial settings where ESD events are frequent.

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Brazil 7
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DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
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Freescale / NXP Semiconductors

HCF4017BT

Freescale / NXP Semiconductors
32D-HCF4017BT

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