CD4026BF - 5-Bit Decade Counter | Harris Corporation | Displays
부품 번호: CD4026BF ✗ 단종CD4026BF 개요
A CMOS decade counter is a synchronous digital counter that advances through ten states for each complete decade of input pulses. The CD4026B combines a 5-stage Johnson counter with a seven-segment decoder, while the CD4033B provides a similar counter structure with binary rather than decoded display outputs. Within the broader hierarchy, the CD4026BF is a CMOS logic IC, a counter and divider, and a display-decoding integrated circuit. This integration is especially useful where low power dissipation, compactness, and direct seven-segment drive capability are important.
The verified product data identifies a single counter element, 5-bit output organization, positive-edge triggering, and a 16-CDIP package. Its stated 3 V to 18 V supply range permits operation from conventional 5 V and 9 V logic systems as well as 15 V industrial-class supply rails. The stated 16 MHz operating frequency provides substantial counting headroom for digital clocks, timers, counters, sequencing circuits, and instrumentation. A qualified power design must still preserve the supply limits and respect the timing requirements of the connected logic family.
The CD4026BF includes clock, clock-inhibit, reset, carry-in, carry-out, decoded display, and supply connections. Its decoded outputs are intended for one seven-segment numerical display rather than arbitrary seven-segment patterns. Carry-in and carry-out support decimal chaining, allowing multiple counting stages to represent values beyond a single decade. The external clock can be inhibited when required, while reset provides a defined starting state. Exact pin functions and electrical limits should be confirmed against the manufacturer datasheet before layout or production release.
Typical uses include digital frequency meters, event counters, industrial panel displays, timer terminals, laboratory instruments, and compact decade-counting modules. In a seven-segment display application, the device can replace separate counter and decoder ICs, simplifying the board area and reducing interstage wiring. In cascaded decimal applications, carry-out can drive the next counter while carry-in determines the selected decade. Designers should account for display current, segment resistors, and the electrical loading of any additional logic connected to the decoded outputs.
A critical design consideration is decoupling. Place the required supply-bypass capacitor close to the 16-CDIP power and ground pins, minimize the clock path between the oscillator or signal source and the clock input, and route return currents without sharing narrow paths with display-current returns. The CD4026BF is a digital counter rather than a power semiconductor, so a safe operating area specification is not applicable. Component marking, ceramic or hermetic grade, temperature grade, and sourcing conditions should be verified against the approved manufacturer documentation.
This page consolidates the verified distributor specifications, package information, cross-reference evidence, practical application guidance, and honest replacement analysis for the CD4026BF. It also distinguishes electrically similar counter options from genuinely verified drop-in choices, helping engineers avoid assuming that same-family CMOS logic parts are interchangeable without checking pinout, supply voltage, display outputs, temperature grade, and package construction.
드롭인 대체품: CD4026BF — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: CD4026BF (동일 폼 팩터 및 풋프린트) — 차이점: Display Output, Logic Family.
CD4026BE
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
CD4026BF/3
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
CD4033BE
✅ 드롭인가격 문의
데이터시트 보기 →CD4026BF 최대 정격 & 전기적 특성
| Counter Type | Decade counter with 7-segment decoder |
| Number of Counter Elements | 1 element |
| Output Organization | 5 bit |
| Clock Edge | Positive edge |
| Supply Voltage Range | 3 V to 18 V |
| 최대 클록 주파수 | 16 MHz |
| Counter Architecture | 5-stage Johnson counter with decoded 7-segment output |
| Package Type | 16-CDIP |
| Total Pin Count | 16 pins |
| 실장 유형 | Through-hole |
| Logic Family | CD4000 CMOS series |
| Technology | CMOS |
| Display Output | Decoded 7-segment output for one numerical display |
| Carry Function | Carry-in and carry-out decimal chaining |
| RoHS 상태 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
CD4026BF 16-cdip 핀 구성 가이드
CD4026BF(16-cdip 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: CD4026BF.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
CD4026BF 적합 용도: 6 애플리케이션s: Digital Event Counter, Seven-Segment Panel Display, Frequency Divider, Industrial Timer Display, Digital Clock and Preset Counter, Sequencing and Test Counter.
Digital Event Counter
The CD4026BF fits digital event and pulse counting because its positive-edge-triggered decade counter advances through ten states per counting cycle while operating from 3 V to 18 V. The verified 16 MHz frequency capability leaves substantial margin for common clock and pulse sources. In this application, the device is placed between the input conditioning stage and the display or downstream decimal logic, with reset used to establish the initial count. Carry-out can clock a second stage when values beyond one decade are required. Designers should use the manufacturer timing data to establish the maximum external pulse rate, account for input rise time, and add conditioning when a mechanical switch or noisy transducer can generate multiple edges. The CD4026BF is advantageous because the counter and display-decoder functions are integrated, reducing board area compared with separate counter and decoder ICs.
추천
Seven-Segment Panel Display
The CD4026BF is suited to one-digit seven-segment panel displays because its internal Johnson counter is decoded into display-drive outputs, eliminating a separate decoder stage. The verified 3 V to 18 V operating range permits use with several CMOS logic rails, while the integrated display function keeps the external signal path short. The counter is placed in the display subsystem and advances after each qualified clock pulse; reset clears the displayed state. Segment current, display forward voltage, and resistor values must be calculated from the particular display and the device's output-current limits, which are not included in the supplied excerpts. Because decoded outputs are not interchangeable with binary counter outputs, CD4026BF is preferable to CD4033BE when the existing board expects direct seven-segment drive signals.
추천
Frequency Divider
The CD4026BF can divide an input frequency into lower-rate or decimal-scaled events because it is explicitly categorized as a counter and divider and supports operation up to 16 MHz. The clock input receives a qualified waveform, while the counter advances one state per positive edge and supplies decoded or carry-derived timing information for downstream stages. For cascaded division, carry-out can become the clock input of another counter and carry-in can control which decade participates in the count. The integration of counting and display decoding makes the device useful in compact divider modules that show a count directly. Engineers should preserve clock-signal rise time, avoid excessive loading on decoded outputs, and verify setup and reset timing against the exact manufacturer datasheet before operating near the stated frequency ceiling.
추천
Industrial Timer Display
The CD4026BF can implement a compact industrial timer display when one decimal digit must be incremented or decremented through external control logic. Its 3 V to 18 V supply range supports conventional CMOS supply rails, while the positive-edge counter and integrated seven-segment decoder reduce the number of ICs required around the display. The timer reference or clock-enable signal enters the counting path, and reset establishes a known display state after power-up. For multi-digit timing values, decimal stages can be chained through carry-in and carry-out, although display blanking and synchronization must be handled elsewhere to avoid visible intermediate states. The selected CD4026BF suffix must be checked for the actual operating-temperature grade, and supply bypassing should be placed close to the device to limit switching transients on the panel rail.
추천
Digital Clock and Preset Counter
The CD4026BF is applicable to digital clock and preset-counter circuits because it combines a decade-counting element with a display decoder and provides reset and clock-inhibit controls. A time-base oscillator can provide periodic count pulses, while clock inhibit can hold the current count when required. The decoded outputs drive a numerical display without requiring a separate Johnson-to-seven-segment decoder. The 16 MHz verified maximum frequency comfortably exceeds the repetitive pulse rate of typical display time bases, although real timing depends on the exact oscillator waveform and supply level. For debouncing user-set controls, external conditioning should be used rather than relying on the counter's reset or inhibit terminals to remove mechanical-contact bounce. Designers should also verify display-current sharing and connector-induced noise under the complete system power and grounding plan.
추천
Sequencing and Test Counter
The CD4026BF can serve as a sequencing or test counter in instrumentation that must accumulate steps, cycles, or test positions while exposing the count to a numerical display. Its positive-edge clocking, reset input, and carry-chain capability support repeatable measurement sequences, while the integrated decoder minimizes the number of external logic packages. The device is connected after the test fixture's qualified event signal, with carry-out used for higher-order counting when required. Because the supplied excerpts do not state output-drive capability, input thresholds, or timing margins, the complete manufacturer datasheet must be used to confirm compatibility with the fixture voltage levels and external clock rate. A star ground or controlled return-current arrangement is advisable when the display shares the measurement circuit, preventing display currents from shifting counter input thresholds.
추천
추천 제품 요약
엔지니어링 참조 데이터: CD4026BF — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | CD4026BE | CD4026BF/3 | CD4033BE |
|---|---|---|---|---|
| Brand | Harris Corporation | Texas Instruments | Harris Corporation | Texas Instruments |
| Package | 16-CDIP | 16-CDIP | 16-CDIP | 16-CDIP |
| Counter Type | Decade counter and divider | Decade counter and divider | Decade counter and divider | Binary counter and divider |
| Display Output | Decoded 7-segment output | Decoded 7-segment output | Decoded 7-segment output | Binary counter output |
주요 차별점
- Direct seven-segment decoding (vs CD4033BE)
- Verified 16 MHz operating capability (vs CD4026BE)
- Direct same-series grade option (vs CD4026BF/3)
설계 노트
Do not treat every CD4000-family counter as interchangeable. CD4026BF provides decoded seven-segment outputs, while CD4033BE provides binary outputs; although the verified comparison reports compatible packages and terminals, an unchanged PCB will not produce the same display behavior with the binary-output part. Confirm whether downstream circuitry consumes decoded segment signals, carry pulses, or binary count bits. Also compare the exact suffix-specific temperature grade and package construction before changing the BOM.
Keep the CD4026BF supply-bypass connection short and place it close to the 16-CDIP supply and ground terminals. The verified data establishes a 3 V to 18 V operating range but does not provide the required bypass capacitance, so use the manufacturer recommendation rather than an arbitrary value. Isolate display-current returns from sensitive clock and signal returns where possible to prevent display transients from shifting input thresholds. This is particularly important when an external display shares the same connector and power source as the counter.
The verified maximum frequency is 16 MHz, but practical design margin depends on clock rise time, supply voltage, temperature, output loading, and the exact timing guarantees. Keep the clock route short, avoid breadboard wiring for high-rate operation, and use a clean edge rather than a slow switch signal. If a mechanical input can bounce, add conditioning or use clock inhibit and reset sequencing. Review setup and hold timing against the full manufacturer datasheet because those values are not contained in the supplied excerpts.
Use a through-hole footprint that matches the verified 16-CDIP package and verify lead spacing, row spacing, pin numbering, and ceramic or plastic body dimensions from the exact mechanical drawing. Do not rely on a generic 16-pin DIP symbol for production layout without checking the manufacturer package drawing. Keep display connectors and high-current LED returns physically separated from the clock input trace, and provide adequate decoupling at the IC pins rather than only at the system power connector.
규정 준수 정보
The supplied verified snippets do not contain current compliance declarations or qualification records. RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status remain unknown as of 2026-10-30.
