CD4020BK - 14-Stage Binary Ripple Counter | Harris
Артикул: CD4020BK ✓ АктивенCD4020BK Обзор
A binary counter is a sequential logic device that stores and advances a binary number on each active clock transition. In the broader semiconductor hierarchy, the CD4020BK belongs to the counter and divider category, within CMOS logic ICs and digital logic. Its 14 internal stages can divide a periodic input by binary factors up to 2^14, subject to the operating conditions and propagation characteristics specified by the manufacturer.
The verified distributor listing classifies CD4020BK as a 1-element, 14-bit, negative-edge-triggered counter in a 16-CFP package. The related manufacturer product information identifies the CD4020B family as a CMOS ripple-carry binary counter/divider. Each stage is described as a master-slave flip-flop, allowing the counter state to advance cleanly when the input clock undergoes a negative transition rather than reacting to both edges.
Typical uses for this counter family include digital time-base generation, frequency division, programmable timing, clock-frequency reduction, and low-frequency waveform generation. The RESET function makes the device useful in sequential systems that require a defined starting state. The Schmitt-trigger clock input is particularly relevant when the source has a slow edge or transition disturbance, although external conditioning may still be needed in demanding EMI or high-noise environments.
CD4020BK is identified with a military temperature grade and a flat, 16-terminal package. Because the supplied data does not state the exact supply-voltage range, operating-temperature limits, maximum clock frequency, output drive capability, or absolute maximum ratings, those values must be confirmed against the manufacturer datasheet before design release. Do not infer missing ratings from the CD4020B family without checking the applicable CD4020BK grade and package.
This product-data page consolidates verified distributor pricing, package and counter details, functional comparisons, design guidance, and same-package replacement constraints. The comparison also distinguishes documented facts from unavailable electrical parameters, helping engineers make a qualification decision without converting family-level information into unsupported CD4020BK specifications.
Аналоги без доработки для CD4020BK — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Для этого товара нет аналогов без доработки.
Запросить аналогиCD4020BK Максимальные параметры и электрические характеристики
| Product Type | 14-stage ripple-carry binary counter/divider |
| Logic Family | CMOS |
| Counter Element Count | 1 element |
| Counter Bit Count | 14 bits |
| Counting Edge | Negative edge |
| Trigger Type | Asynchronous negative-edge triggered |
| Reset Function | Resets counter to the all-zero state |
| Clock Input | Schmitt-trigger action |
| Package Type | 16-CFP flat-rail package |
| Terminal Count | 16 terminals |
| Package Shape | Rectangular |
| Mounting Form | Flat |
| Temperature Grade | Military |
| Supplier Availability | In stock at LCSC |
| LCSC Starting Price | $7.7318 |
| DigiKey Marketplace Availability | Buy now, ships today |
Руководство по цоколевке CD4020BK в корпусе rectangular
Цоколевка для CD4020BK (корпус rectangular). Эта цифровая ИС включает выводы GPIO, интерфейсы связи (UART, SPI, I2C) и выводы питания. Обратитесь к техническому описанию производителя для альтернативных функций выводов и вариантов конфигурации. Необходимо для проектирования встраиваемых систем и трассировки печатных плат.
Нет подробных данных о распиновке для CD4020BK.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
CD4020BK подходит для 6 применениеs: Frequency Divider, Programmable Time Base, Clock Frequency Reduction, Digital Event Counter, Waveform Generation, Industrial Sequencing Control.
Frequency Divider
The CD4020BK fits a frequency-divider stage that must reduce a periodic input by a selectable binary ratio. According to the verified TI CD4020B information, the device is a 14-stage ripple-carry binary counter whose state advances on each negative transition of the clock. A designer can therefore use an available counter output as a divided clock. The exact usable upper frequency and cumulative output delay are not stated in the supplied data, so the exact CD4020BK datasheet must be checked before setting the maximum input rate, especially for high-ratio taps.
Programmable Time Base
The CD4020BK can provide the counting core of a programmable digital time-base circuit because it combines 14 binary stages with a defined reset state. According to the verified TI product information, a high RESET level returns every stage to zero, allowing the next clock sequence to begin predictably. This is useful for retriggerable timers, delayed events, and repetitive interval generation. The RESET implementation should be treated as asynchronous, and system timing margins must account for ripple propagation through the selected counter stage.
Clock Frequency Reduction
The CD4020BK is applicable when a system needs a lower-rate clock derived from a faster periodic signal. Its negative-edge-triggered, 14-stage ripple architecture supports binary division using one of the available count outputs. According to the verified DigiKey Marketplace record, the part is a one-element, 14-bit binary counter, while the TI family page confirms master-slave counter stages. The design must verify the maximum input frequency, supply voltage, and output timing from the exact datasheet because those limits are not present in the supplied excerpts.
Digital Event Counter
The CD4020BK can count recurring events in a digital control system and expose a binary count for decoding by surrounding logic. Its 14-bit count capacity and negative-edge operation make it suitable for event totals, duty-cycle windows, and slow sequencing mechanisms. According to the verified TI CD4020B description, RESET forces the all-zero state, while each negative clock transition advances the count. Because ripple counters can accumulate propagation delay across multiple stages, use the earliest valid output for high-speed timing and reserve later outputs for slower sequencing.
Waveform Generation
The CD4020BK can support repetitive waveform generation by dividing a stable input clock and using a selected count output as a periodic logic signal. According to the verified product information, the Schmitt-trigger clock input tolerates slow input transitions, which is helpful when deriving the counter clock from a relaxed RC or recovered oscillator stage. The circuit should still include controlled rise and fall times, verify output drive against the load, and keep the clock source away from noise-sensitive switching edges.
Industrial Sequencing Control
The CD4020BK fits a sequencing controller in industrial or embedded equipment where a long binary count can address a bank of discrete stages. Its 14 counter bits provide more sequence states than a basic dual counter, while the RESET input establishes a repeatable machine state. According to the verified listing, the exact CD4020BK is designated as a military-grade, 16-CFP part. The supply range and operating-temperature limits must be confirmed because the verified excerpts provide the grade designation but not numeric electrical boundaries.
Справочные инженерные данные для CD4020BK — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар |
|---|---|
| Brand | Harris Corporation |
| Package | 16-CFP |
| Counter Stages | 14 stages |
| Counter Bits | 14 bits |
| Counting Edge | Negative edge |
| Logic Family | CMOS |
| Reset Function | Reset to all zeros |
| Clock Input | Schmitt-trigger action |
| Temperature Grade | Military |
| Terminal Count | 16 terminals |
Ключевые отличия
- Specific 14-stage binary ripple-counter configuration (против Generic CD4020 family options)
- Documented military temperature-grade designation (против Non-military CD4020-family suffixes)
- Defined 16-CFP package configuration (против Alternate-package CD4020 devices)
Заметки по проектированию
Use the verified Schmitt-trigger clock behavior as the starting point, but still constrain the clock waveform at the PCB. Keep the clock route short, return it over a continuous ground reference, and avoid coupling from nearby switching nodes. A Schmitt-trigger input tolerates slow transitions; it does not remove the need for a clean reference, adequate noise margin, and verification of the exact CD4020BK maximum clock frequency.
Do not treat the broader CD4020B family page as proof that every CD4020B suffix shares the same voltage, timing, temperature, and package ratings. The supplied record identifies CD4020BK specifically as military grade in a 16-CFP package. Before schematic release, compare the exact orderable suffix and package drawing against the production BOM, then verify the numeric limits that are marked as needed in the specifications.
Place bypass capacitance close to the supply and ground pins using the pin arrangement from the official package drawing. Route the clock away from RESET and count-output nets where practical, because a ripple counter can produce rapid transitions at stage outputs. Keep exposed or leaded package clearance consistent with the 16-CFP mechanical drawing, and do not infer package dimensions from a generic CFP illustration.
Because the verified excerpts do not provide the supply-voltage range or quiescent current, calculate the available power budget from the exact manufacturer limits before enabling the counter. Account for CMOS transition current at the selected clock frequency and any load on the count outputs. A supply that works at a slow clock may not provide sufficient noise margin or timing margin at the maximum intended frequency.
Информация о соответствии
The verified excerpts identify military temperature grade but do not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Compliance remains unknown for the exact CD4020BK.
