CD4017BD - CMOS Decade Counter | Texas Instruments | 16-Pin CDIP
N.º da peça: CD4017BD ✓ AtivoCD4017BD Visão geral
A decade counter is a digital counter that cycles through ten states, from zero through nine, before repeating. The CD4017BD implements this behavior with ten mutually decoded outputs, Q0 through Q9. Each output becomes active for one clock interval, allowing a clocked system to activate LEDs, relays, stepper-motor phases, multiplexed displays, or sequential test points. In the larger IC hierarchy, it belongs to the CMOS logic family, specifically the counters and dividers class.
The primary features are the ten decoded outputs, 10-bit internal counting sequence, positive-edge-triggered clock input, clock inhibition, asynchronous reset, and carry output. The carry output becomes active when the counter transitions from state nine to state zero, allowing multiple CD4017BD devices to form a longer counting or stepping system. The CMOS architecture supports low-power operation and broad supply-voltage flexibility for systems operating from conventional 5 V rails or higher-voltage industrial control supplies.
The CD4017BD uses a clocked state sequence in which the decoded outputs follow the applied clock transitions. Clock inhibition provides a synchronous control function for holding the current count when required, while the reset input returns the counter to the zero state. These controls allow a controller to combine counting with external sequencing, measurement, or fault-management logic without requiring additional discrete state machines.
Typical applications include ten-step relay sequencing, LED chasers, industrial sequencers, test-pattern generation, cyclic function selection, and decade-based control systems. The hermetic CDIP-16 package also suits equipment where sealed construction and through-hole assembly are preferred over a surface-mount package. Designers should verify the permitted clock frequency and timing limits at the selected supply voltage in the manufacturer datasheet before driving high-frequency events.
For reliable operation, use the clock and control inputs with suitable pull resistors when they can float, connect the supply and ground pins close to the device, and keep output loads within the specified limits. Decoupling capacitors should be placed near the supply pins, and unused inputs should be tied to a defined logic level rather than left floating. This page combines device specifications, drop-in alternatives, application guidance, and practical layout considerations for faster engineering selection.
The CD4017BD is the version to select when a through-hole CMOS decade counter with decoded outputs and flexible supply-voltage operation is required. It is particularly useful when a design needs the classic CD4017B function in a hermetic ceramic DIP package and accepts the timing and output-drive characteristics specified for the CD4017B family.
Alternativas drop-in para CD4017BD — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com CD4017BD (mesmo formato e footprint) — diferindo em Logic Family, Package.
CD4017BE
✅ Drop-InConsulte o preço
Ver ficha técnica →CD4017BCN
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC14017BCPG
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CD4017BD Classificações máximas e características elétricas
| Product Type | CMOS decade counter and divider |
| Manufacturer | Texas Instruments |
| Encapsulamento | 16-lead CDIP hermetic ceramic package |
| Tipo de montagem | Through-hole |
| Logic Family | CD4000 CMOS |
| Counting Outputs | 10 decoded outputs, Q0-Q9 |
| Counter Width | 10-bit |
| Counting Direction | Up counter |
| Clock Triggering | Positive-edge triggered |
| Reset Function | Asynchronous reset to the zero state |
| Clock Inhibition Function | Clock inhibit input |
| Carry Output | Carry output for counter chaining |
Configuração de pinos do CD4017BD
| Pino 1 | CLK — Positive-edge-triggered clock input |
| Pino 2 | CL INH — Clock inhibit input |
| Pino 3 | Q0 — Decoded counter output 0 |
| Pino 4 | Q1 — Decoded counter output 1 |
| Pino 5 | Q2 — Decoded counter output 2 |
| Pino 6 | Q3 — Decoded counter output 3 |
| Pino 7 | Q4 — Decoded counter output 4 |
| Pino 8 | GND — Ground connection |
| Pino 9 | Q8 — Decoded counter output 8 |
| Pino 10 | Q7 — Decoded counter output 7 |
| Pino 11 | Q6 — Decoded counter output 6 |
| Pino 12 | Q5 — Decoded counter output 5 |
| Pino 13 | Q9 — Decoded counter output 9 |
| Pino 14 | VDD — Positive supply connection |
| Pino 15 | CO — Carry output for counter rollover and cascading |
| Pino 16 | RESET — Asynchronous reset input |
Aplicações típicas
CD4017BD é adequado para 6 aplicaçãos: LED Chase and Sequential Lighting, Industrial Relay Sequencing, Test and Measurement Point Selection, Cyclic Control and Function Selection, Stepper Motor Phase Sequencing, Automotive and Mobile Sequential Warning System.
LED Chase and Sequential Lighting
The CD4017BD is suitable for LED chase circuits because its ten decoded outputs advance in a fixed sequence after positive-edge clock transitions. Each Q0-Q9 output can control a separate indicator stage, allowing one clock source to produce a repeating ten-step visual or diagnostic pattern. The circuit is especially useful for panel indicators, status displays, and educational timing demonstrations. Every LED path should include current limiting, and the clock frequency must stay within the CD4017B timing limits. Reset can return the sequence immediately to Q0, while clock inhibit can hold a selected state when the surrounding controller needs to pause the pattern.
Recomendado
Industrial Relay Sequencing
The CD4017BD can act as the state sequencer for a ten-step industrial relay or contactor system. Its ten decoded outputs provide mutually exclusive selection signals, while the asynchronous reset returns the sequence to a known state and the carry output marks completion of one ten-step cycle. This arrangement can coordinate pumps, solenoids, indicators, or actuator-enable stages without requiring a separate programmable controller. Because relay coils are inductive, flyback protection is required at each switched load, and the designer must confirm that output current, supply voltage, and switching timing remain within the device ratings.
Recomendado
Test and Measurement Point Selection
A CD4017BD can select test points in sequence within instrumentation and automated test equipment. The ten decoded outputs create a deterministic order, allowing each channel to be connected or interrogated once per clock interval. The carry output can indicate a complete pass through the sequence, while reset establishes a repeatable starting condition. The counter should be clocked by the test controller or a precision timer, and the selected test-point circuitry must avoid loading the outputs beyond the manufacturer’s electrical limits. Using a dedicated multiplexed interface alongside the counter can provide isolation where signal amplitudes exceed CMOS logic levels.
Recomendado
Cyclic Control and Function Selection
The CD4017BD implements a ten-position cyclic function selector for control panels, process equipment, and laboratory apparatus. Rather than storing every timing sequence in firmware, the clock drives the decoded outputs and the surrounding system enables one function at a time. This is useful for automated test cycles, timed output groups, and repetitive machine steps. The inhibit input can pause advancement under fault conditions, and the reset input can abort a sequence. Timing accuracy depends on the clock source, so a crystal oscillator, timer IC, or microcontroller clock should be selected according to the required frequency accuracy and drift budget.
Recomendado
Stepper Motor Phase Sequencing
The CD4017BD can generate a repeating sequence of control outputs suitable for stepping one phase of a small stepper-motor driver at a time. Each decoded output can represent a phase-enable stage, and the carry output marks the end of a full ten-step sequence. The motor driver must provide the required current and isolation because the counter outputs are logic signals rather than power-stage drivers. Designers should include suppression networks and confirm that the switching rate does not exceed the counter’s timing or output-transition limits. The asynchronous reset is useful for returning the mechanism to a repeatable home phase.
Recomendado
Automotive and Mobile Sequential Warning System
The CD4017BD can produce a deterministic sequence for warning lamps, turn-signal effects, or status annunciators. Ten decoded outputs provide a compact way to distribute sequential indications while retaining a common reset point for system startup. In an automotive installation, every output driver, lamp load, and suppression component must satisfy the vehicle’s electrical and environmental requirements, and the counter’s qualification status must be verified before use in safety-related or regulated functions. The same architecture can serve mobile and battery-powered equipment where low component count and deterministic sequencing are valuable.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para CD4017BD — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | CD4017BE | CD4017BCN | MC14017BCPG |
|---|---|---|---|---|
| Package | CDIP-16 hermetic ceramic | CDIP-16 | CDIP-16 | CDIP-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Function | CMOS decade counter and divider | CMOS decade counter and divider | CMOS decade counter and divider | CMOS decade counter |
| Decoded Outputs | 10 outputs, Q0-Q9 | 10 outputs, Q0-Q9 | 10 outputs, Q0-Q9 | 10 outputs, Q0-Q9 |
| Clock Triggering | Positive-edge triggered | Positive-edge triggered | Positive-edge triggered | Positive-edge triggered |
| Reset Function | Asynchronous reset | Asynchronous reset | Asynchronous reset | Asynchronous reset |
| Carry Output | Yes | Yes | Yes | Yes |
| Price Tier | Request a quote | Request a quote | Request a quote | Request a quote |
Principais diferenciais
- Hermetic ceramic through-hole construction (vs CD4017BCN)
- Established CD4017B function and pin organization (vs MC14017BCPG)
- Direct family sourcing within Texas Instruments (vs MC14017BCPG)
Notas de projeto
Keep the clock inhibit and reset inputs at defined logic levels whenever they are not actively controlled. Floating CMOS inputs can consume unpredictable current and may produce unintended transitions in the counter chain. Use pull-up or pull-down resistors where a control line can remain disconnected, and define reset behavior during power-up so the first decoded state is repeatable.
Place the supply bypass capacitor close to pin 14 and the ground return close to pin 8. Route the clock and reset nets away from high-current switching loops, and keep output routing away from sensitive analog nodes. Because the CDIP-16 footprint has through-hole leads, check annular size, hole diameter, solder-mask clearance, and component height against the PCB fabrication rules before layout release.
Use a clean, low-impedance clock source and avoid long traces that couple clock edges into reset or inhibit lines. If the clock originates from another digital device, verify voltage compatibility, rise time, fall time, and output-drive margin at the selected supply voltage. The counter’s maximum operating frequency depends on supply voltage, so keep the actual edge rate below the manufacturer’s specified limit with system-level timing margin.
Size every decoded-output load for the specified output-drive capability at the chosen supply voltage. LED strings, relay drivers, and indicator buffers may need transistor or open-collector interface stages. Include inductive snubbers for relay coils and ensure that the supply can absorb the switching and load current without excessive droop, which could cause false clock edges or unstable decoded outputs.
Informações de conformidade
Use the manufacturer CD4017B datasheet and the exact ordering information to determine environmental, material, and qualification status. No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was identified.
