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HomeProductsIntegrated Circuits (ICs)Logic - Counters, DividersCD4024BCM
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CD4024BCM - onsemi

Manufacturer Part Number
CD4024BCM
Manufacturer
onsemi
Allelco Part Number
32D-CD4024BCM
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
8,060 pcs available, New & Original
Parts Description
IC BINARY COUNTER 7-BIT 14SOIC
Package
14-SOIC
Data sheet
CD4024BCM.pdf

Datasheets

CD4024BC.pdf

Environmental Information

onsemi REACH.pdf onsemi RoHS.pdf
RoHs Status
 
Compare
Our certification
In stock: 8060
  • Unit Price: $1.461
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $1.461 $1.46
200+ $0.566 $113.20
500+ $0.546 $273.00
1000+ $0.536 $536.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

CD4024BCM Tech Specifications
onsemi - CD4024BCM technical specifications, attributes, parameters and parts with similar specifications to onsemi - CD4024BCM

Product Attribute Attribute Value
Manufacturer onsemi
Voltage - Supply 3 V ~ 15 V
Trigger Type Negative Edge
Timing -
Supplier Device Package 14-SOIC
Series 4000B
Reset Asynchronous
Package / Case 14-SOIC (0.154", 3.90mm Width)
Package Tube
Product Attribute Attribute Value
Operating Temperature -55°C ~ 125°C
Number of Elements 1
Number of Bits per Element 7
Mounting Type Surface Mount
Logic Type Binary Counter
Direction Up
Count Rate 12 MHz
Base Product Number CD4024

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

CD4024BCM Image
CD4024BCM (1)

Manufacturer Part Number

CD4024BCM

Manufacturer

onsemi

Introduction

The CD4024BCM is a 7-bit binary counter from onsemi's 4000B series of CMOS logic devices. It is a versatile and reliable counter IC suitable for a wide range of digital applications.

Product Features and Performance

7-bit binary counter

Counts up to 128 (2^7)

Operating frequency up to 12 MHz

Negative edge-triggered counting

Asynchronous reset

Wide operating voltage range of 3V to 15V

Wide operating temperature range of -55°C to 125°C

Surface mount 14-SOIC package

Product Advantages

Compact and space-saving design

High-speed counting capability

Versatile voltage and temperature range

Reliable CMOS construction

Key Reasons to Choose This Product

Proven performance in a wide range of digital applications

Cost-effective solution for basic counting needs

Ease of integration into various electronic systems

Robust design for reliable long-term operation

Quality and Safety Features

Rigorous quality control measures

Compliance with industry safety standards

Compatibility

The CD4024BCM is compatible with other 4000B series CMOS logic devices and can be used in a variety of digital circuit designs.

Application Areas

Digital counters and dividers

Frequency division

Timing and control circuits

Industrial automation and control systems

Test and measurement equipment

Product Lifecycle

The CD4024BCM is currently in an obsolete product status. Customers are advised to contact our website's sales team for information on equivalent or alternative models that may be available.

Frequently Asked Questions(FAQ)

How does the CD4024BCM binary counter perform in high-temperature industrial environments, and what design considerations are necessary to maintain reliable operation at 125°C?
The CD4024BCM operates reliably across an extended temperature range of -55°C to 125°C, making it suitable for harsh industrial applications. At 125°C, internal transistor characteristics shift slightly due to increased carrier mobility and leakage currents, which can affect propagation delay. Designers should account for this by derating timing margins in critical path logic and ensuring adequate noise margins when interfacing with other 4000B-series logic devices. Additionally, supply voltage stability becomes more critical at elevated temperatures due to reduced MOSFET threshold voltages.
What is the maximum clock frequency the CD4024BCM can sustain under full load conditions, and how does parasitic capacitance impact real-world performance compared to datasheet specifications?
While the datasheet specifies a count rate of up to 12 MHz at typical supply voltages, actual maximum operating frequency in a PCB layout depends heavily on trace inductance, package lead capacitance, and load conditions. In practice, achieving 12 MHz requires careful layout with short interconnects and minimal capacitive loading. At higher frequencies, the asynchronous reset signal may experience setup/hold violations if not buffered properly. Most engineers observe reliable operation up to 8–10 MHz in standard surface-mount implementations due to unavoidable PCB parasitics.
How does the CD4024BCM compare to modern CMOS alternatives like the 74HC4024 for low-power battery-operated systems?
The CD4024BCM draws significantly higher quiescent current—typically in the microampere range—compared to modern low-voltage CMOS parts like the 74HC4024, which operate below 10 µA at 3.3 V. However, the CD4024BCM supports wider supply voltage ranges (3 V to 15 V) and maintains better noise immunity at higher voltages. For battery-powered designs requiring long life and moderate speed, the 74HC4024 is preferable, but legacy 12 V or automotive systems may still benefit from the CD4024BCM’s robustness despite its power inefficiency.
Can the CD4024BCM be used as a programmable divide-by-N circuit, and what limitations apply to fractional division ratios?
Yes, the CD4024BCM can function as a programmable divider by connecting Qn outputs to the MR (master reset) input, allowing division ratios from 1 to 127. However, only integer divisions are achievable; fractional ratios require external circuitry such as phase-locked loops or digital feedback controllers. The asynchronous reset mechanism enables rapid state clearing, but precise timing control demands attention to reset pulse width, which must exceed one full clock cycle to guarantee proper initialization.
What precautions should be taken when cascading multiple CD4024BCM stages to extend bit depth beyond seven bits?
Cascading requires synchronizing the clock inputs while accounting for cumulative propagation delays between stages. Each stage introduces approximately 100–200 ns of delay depending on supply voltage and load, which can limit maximum frequency with additional stages. Clock skew between cascaded chips must remain minimal (<50 ns) to prevent race conditions. It's advisable to use matched traces and possibly buffer the clock line when building longer counters. Also, ensure all reset lines are driven together to avoid partial resets that corrupt the sequence.
How does the CD4024BCM handle power-on reset behavior, and is additional external circuitry required for reliable startup?
The CD4024BCM features an asynchronous master reset (MR) pin that forces all outputs low regardless of clock state. Upon power application, internal node stabilization times vary with supply ramp rate. If the power supply rises slowly, the IC may enter undefined states. Adding a small RC network (e.g., 10 kΩ + 100 nF) to MR ensures a clean reset pulse during startup. Without such conditioning, marginal designs risk erratic initial counts, especially near the minimum 3 V operating threshold.
Is the CD4024BCM compatible with TTL logic families, and what level shifting is needed when interfacing with 5 V CMOS systems?
The CD4024BCM is fully CMOS-compatible and interoperable with 5 V TTL levels when powered at 5 V. Input thresholds align closely with TTL specifications, allowing direct connection without level shifters. However, driving the device from 3.3 V CMOS into a 5 V system may result in degraded noise margins unless output stages are buffered. Conversely, driving a 3.3 V CMOS gate from the CD4024BCM running at 5 V requires a bidirectional level converter due to output swing limitations at lower supplies.
What are the thermal implications of operating the CD4024BCM continuously at 125°C, and how does packaging affect heat dissipation?
As a standard SOIC package with limited thermal conductivity (approx. 50–70 mW/°C junction-to-ambient), continuous operation at 125°C increases junction temperature significantly under even modest power dissipation. At 5 V supply and full switching activity, power consumption exceeds 10 mW, raising die temperature by ~50°C above ambient. While the device tolerates this, prolonged exposure accelerates electromigration and reduces long-term reliability. Thermal vias under the package or airflow assistance are recommended in high-temp applications to mitigate stress.
How does electromagnetic interference (EMI) affect the CD4024BCM’s counting accuracy, and what layout practices minimize glitches?
Fast edges and repetitive switching in the CD4024BCM generate broadband EMI, particularly harmonics near 100 MHz at 12 MHz clock rates. Poor grounding or long unterminated traces act as antennas, coupling noise into sensitive input nodes. To minimize errors, implement a solid ground plane, keep clock traces short and shielded, and use decoupling capacitors (0.1 µF ceramic) within 5 mm of Vcc and GND pins. Ferrite beads on supply lines further suppress conducted emissions in noisy environments.
Can the CD4024BCM drive LED displays directly, and what resistor values are appropriate for safe operation?
The CD4024BCM outputs can source/sink up to 1 mA per pin when supplied at 15 V, sufficient for low-current indicators. Driving standard red LEDs requires series resistors calculated as R = (Vsupply − Vf_LED − Vout)/I_LED. For example, at 5 V supply with a 1.8 V LED drop and 2 V logic high, a 1.2 kΩ resistor limits current to ~2.5 mA. Higher supply voltages necessitate larger resistors or current-limiting transistors to stay within absolute maximum ratings and prevent excessive power dissipation in the IC.
What is the significance of the "Obsolete" status for the CD4024BCM, and are there viable migration paths for existing designs?
Although listed as obsolete by Fairchild Semiconductor, the CD4024BCM remains available through authorized distributors and is often stocked for legacy support. Migration should consider pin-compatible replacements like the 74HCT4024 or NXP 74LVC4024, which offer similar functionality with improved ESD protection and lower power. Transition plans should include verifying timing compatibility and validating reset behavior under target supply rails, as newer variants may have tighter voltage tolerances.
How many unique states can the CD4024BCM represent, and why does this matter for applications like ring counters or frequency dividers?
The 7-bit architecture provides exactly 128 distinct states (2^7), enabling precise frequency division down to f_out = f_in / 128. This makes it ideal for audio synthesizers, clock generators, and timing circuits requiring exact ratio control. However, not all state sequences are accessible without modification; the natural binary progression skips invalid combinations unless external logic enforces specific patterns—critical for implementing Johnson or twisted-ring counters.
Does the CD4024BCM support synchronous reset functionality, and how does this affect system-level timing budgets?
No, the CD4024BCM employs an asynchronous reset via the MR pin, meaning state clearing occurs immediately upon assertion independent of the clock edge. This simplifies control logic but introduces uncertainty in worst-case timing analysis since reset duration isn't synchronized to the clock domain. Designers must ensure reset pulses remain active longer than one full clock period to guarantee initialization, adding latency to system start-up sequences compared to synchronous counterparts.
What role does the base product number CD4024 play in identifying compatible variants, and how do suffixes like "BCM" influence electrical characteristics?
The base part CD4024 defines the core 7-bit binary counter architecture across various manufacturers and packages. Suffixes denote package type ("M" = SOIC), temperature grade ("C" = commercial), and sometimes logic family ("BC" = standard CMOS). The "CM" suffix specifically identifies the 14-pin SOIC variant used in the CD4024BCM, confirming package footprint and pinout alignment with JEDEC standards. Always cross-check full model numbers rather than relying solely on the base designation to avoid pin mismatches.
How does supply voltage variation affect output rise/fall times in the CD4024BCM, and what implications exist for mixed-voltage systems?
Rise and fall times increase linearly with decreasing supply voltage due to reduced overdrive voltage across MOSFETs. At 3 V, propagation delays may double compared to 15 V operation, impacting maximum toggle rates. In mixed-voltage systems where the CD4024BCM drives slower loads at lower rails, timing margins tighten. Designers should simulate worst-case delays using SPICE models and add slack buffers if crossing voltage domains, ensuring downstream logic meets setup/hold requirements.
Are there known issues with metastability when using the CD4024BCM as a synchronizer, and what mitigation strategies apply?
Metastability risk arises only if asynchronous signals (like reset or external data) transition too close to clock edges relative to internal flip-flop resolution times (~10–20 ns). Since the CD4024BCM lacks internal synchronization for external inputs beyond its clock, any non-clocked control line must be synchronized externally using dual flip-flop chains before interacting with the counter. This precaution is essential when integrating with FPGAs or microcontrollers where handshake signals cross clock domains unpredictably.
What environmental certifications (RoHS, ECCN) indicate about the CD4024BCM’s suitability for global manufacturing, and how do these impact sourcing decisions?
RoHS3 compliance confirms absence of restricted substances like lead, mercury, and cadmium, aligning with EU directives and simplifying export to regulated markets. ECCN EAR99 classification indicates no U.S. export restrictions, facilitating worldwide procurement. These attributes enhance supply chain flexibility and reduce customs complexity, though obsolete status still warrants dual-sourcing strategies to avoid single-point failures in production continuity planning.

Parts with Similar Specifications

The three parts on the right have similar specifications to onsemi CD4024BCM

Product Attribute CD4024BCM CD4024BDMSR CD4024BCN CD4024BEG4
Part Number CD4024BCM CD4024BDMSR CD4024BCN CD4024BEG4
Manufacturer Fairchild Semiconductor Renesas Electronics America Inc onsemi Luminary Micro / Texas Instruments
Direction - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - Supply - - - -
Trigger Type - - - -
Number of Bits per Element - - - -
Count Rate - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Timing - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Logic Type - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Reset - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Number of Elements - - - -
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)

CD4024BCM Datasheet PDF

Download CD4024BCM pdf datasheets and onsemi documentation for CD4024BCM - onsemi.

Datasheets
CD4024BC.pdf
Environmental Information
onsemi REACH.pdf onsemi RoHS.pdf

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Customer Reviews

Evaluation: 10 Articles

  • 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.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
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.
Contact us if you have any questions.
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CD4024BCM Image

CD4024BCM

onsemi
32D-CD4024BCM

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