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CD4018BM - 10 MHz CMOS Divide-by-N Counter | Texas Instruments
CD4018BM

CD4018BM - 10 MHz CMOS Divide-by-N Counter | Texas Instruments

Texas Instruments CD4018BM is a 5-bit CMOS presettable divide-by-N counter with a typical operating frequency of 10 MHz at a 10 V supply in a 16-lead SOIC package. It provides buffered Q outputs, preset control, and static operation rated to 20 V. The counter belongs to the logic IC family and implements programmable frequency division, sequencing, and pulse-counting functions using CMOS logic. A CMOS presettable divide-by-N counter is a type of logic counter that uses a Johnson-counter structure to divide an input clock by a programmable integer. The CD4018B family contains five counter stages with buffered outputs. Its preset and reset controls allow a counter state to be loaded or cleared, making it useful in digital timing, sequencing, and industrial control circuits. Key features include medium-speed operation at 10 MHz typical with a 10 V supply, fully static operation, and 5 V, 10 V, and 15 V parametric ratings. The device also offers a maximum input current of 1 µA at 18 V, standardized symmetrical output characteristics, and a 16-lead surface-mount SOIC package for compact PCB layouts. Technically, the CD4018BM combines five Johnson-counter stages with counter-preset control gating. Its buffered outputs allow external logic to observe multiple count phases, while the clock, clock-enable, reset, and preset inputs support deterministic state control. Because it is a static CMOS device, its operating characteristics remain stable when the clock is inactive, which is useful in low-duty-cycle equipment. Typical applications include programmable pulse generators, industrial timers, sequence dividers, frequency dividers, digital time-base circuits, and sequential control logic. The 10 MHz typical operating speed supports moderate-frequency clock division, while the 16-lead SOIC package allows the counter to be integrated into conventional surface-mount control boards. When using the device, respect the supply-voltage limits and ensure unused inputs are connected to a defined logic level. Keep clock and control traces away from noisy switching nodes, and use decoupling close to VDD. The Q outputs should not be loaded beyond the datasheet output-current limits, particularly when driving multiple external loads. This product page combines the manufacturer datasheet characteristics with package, application, replacement, and design guidance to help engineers evaluate the CD4018BM without relying on a raw datasheet summary alone.

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CD4020BD - 14-Stage CMOS Counter | Texas Instruments
CD4020BD

CD4020BD - 14-Stage CMOS Counter | Texas Instruments

The Texas Instruments CD4020BD is a CMOS 14-stage ripple-carry binary counter and divider with a 16-pin SOIC package, operating from 3 V to 18 V and supporting clock frequencies up to 24 MHz. It provides independently accessible binary outputs, a master reset input, and oscillator-capable clock inputs for frequency division and timing applications. A binary counter is a sequential digital-logic component that advances its internal count when triggered by a clock edge. The CD4020 belongs to the CMOS counter/divider hierarchy, where it combines a clocked counting circuit with multiple parallel output stages. Each output represents a different binary bit of the accumulated count, allowing one incoming clock waveform to produce division ratios from 2 through 16,384. The principal features of the CD4020BD include 14 ripple-carry stages, operation across a 3 V to 18 V supply range, and operation up to 24 MHz. Its parallel outputs support Q0 through Q12 and the final divided output Q14. A master reset terminal returns the counting sequence to its initial state, while separate oscillator terminals provide access to the internal oscillator or allow external timing signals to drive the counter. Ripple-carry implementation means that each counting stage triggers the next stage after a propagation delay. This architecture is effective when the outputs are sampled at a slower rate than the input clock, but it is not a synchronous design in which all stages update on one common edge. Engineers should therefore account for accumulated propagation delay and use the device where output timing does not require simultaneous state changes. Typical uses include digital frequency dividers, periodic-event generators, timer and delay circuits, industrial counters, instrumentation, and embedded control logic. The CD4020 can generate divide-by-2, divide-by-4, divide-by-8, divide-by-16, and higher ratios without requiring a bank of individual flip-flops. Its broad supply range also permits operation across common 3.3 V, 5 V, and higher-voltage CMOS systems. When designing a divider, verify the maximum clock rate against supply voltage and temperature, and place a suitable bypass capacitor close to the supply terminals. Do not drive unused inputs with floating nets. Because ripple transitions can occur between stages, add qualification at each output when downstream circuitry must not observe intermediate count values. This product page combines the manufacturer device information, sourcing guidance, complete package pin assignment, operating comparisons, and practical design guidance for engineers evaluating the CD4020BD as a legacy-compatible CMOS counter and divider.

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CD4020BE - 14-Bit Ripple-Carry Counter | Texas Instruments
CD4020BE

CD4020BE - 14-Bit Ripple-Carry Counter | Texas Instruments

The Texas Instruments CD4020BE is a 14-bit CMOS ripple-carry binary counter and divider with a negative-edge-triggered clock input, operating from a single supply in a 16-pin plastic dual-inline package (16-PDIP). The counter advances one count on each high-to-low transition of the clock and provides 14 binary output stages for frequency division, timing, and event counting. An active-high reset allows the counting sequence to be cleared before a new operation. A ripple-carry binary counter is a type of sequential logic circuit that advances a binary count after each active clock edge. Its stages are connected in cascade, so propagation delay accumulates across the counter. This makes the CD4020BE suitable for simple divide-by-2^n and divide-by-2^(n+1) arrangements when the required output is the logical counter state rather than a high-speed synchronous binary word. The CMOS implementation places the device within the broader hierarchy of counter IC, digital logic IC, and semiconductor categories. The verified CD4020BE features include a single 14-bit counter element, negative-edge operation, 12 buffered outputs identified in the supplied comparison data, and a 16-PDIP package. The counter uses master-slave stages, helping prevent output changes while the clock is at its active level. Its divide-by-two output arrangement enables cascaded frequency division without requiring a separate binary-to-binary divider. The ripple architecture makes each successive output change after the clock transition because the carry propagates through the internal flip-flops. Designers should therefore use the appropriate decoded or single-stage output rather than treating Q13 and Q0 as a simultaneously updated binary bus. The package's through-hole format also supports prototyping, educational instruments, industrial control systems, and repair applications where PCB access and hand soldering are important. Typical uses include divide-by-16 or divide-by-4096 clock generation, periodic timer references, digital frequency division, industrial sequence counters, and embedded control logic. Because the counter responds to the negative clock edge, the source waveform, reset timing, and any downstream decoder must be checked to avoid counting an unintended transition. When laying out a new design, route the clock away from sensitive analog nodes and provide a clean return path. For reliable reset release, ensure the reset signal is inactive before the first intended clock edge. If the application requires simultaneous binary updates, a synchronous counter should be considered because ripple propagation delay can create intermediate output states. This page consolidates verified distributor information, pin-compatible counter alternatives, parameter comparisons, and practical design guidance. It helps engineers distinguish the CD4020BE from positive-edge counters and non-pin-compatible divider functions before committing to a PCB or production order.

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CD4020BK - 14-Stage Binary Ripple Counter | Harris
CD4020BK

CD4020BK - 14-Stage Binary Ripple Counter | Harris

Harris Corporation CD4020BK is a 14-stage, negative-edge-triggered ripple-carry binary counter and divider in a 16-pin flat-rail CFP package. The verified product data identifies one counter element, 14 counter bits, and a binary counter/divider function. Its RESET input returns the counter to the all-zero state, while each negative transition of the clock input advances the count. The input stage uses Schmitt-trigger action, allowing operation with slow or noisy clock transitions. 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.

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CD4022BE - 4-Stage CMOS Octal Counter | Texas Instruments
CD4022BE

CD4022BE - 4-Stage CMOS Octal Counter | Texas Instruments

Texas Instruments CD4022BE is a 4-stage CMOS Johnson counter with 8 decoded outputs, operating from a 5 V, 10 V, or 15 V parametric rating and delivering medium-speed operation with a typical clock frequency of 10 MHz at VDD = 10 V. The device is packaged in a 16-lead plastic dual-in-line package identified as 16-PDIP. A counter IC is a synchronous or asynchronous digital logic device that advances an internal binary state when it receives a clock transition. A CMOS counter belongs to the logic IC family and is commonly used to divide an input frequency, generate sequential timing signals, or sequence multiple digital operations. The Johnson configuration in the CD4022B uses four internal stages and presents eight decoded outputs. Its decade-counter behavior provides eight active states, while the associated clock, reset, and clock-inhibit inputs control counting, initialization, and temporary stopping of the count sequence. The principal operating features include fully static operation, standardized symmetrical output characteristics, and a typical operating frequency of 10 MHz at VDD = 10 V. The CD4022BE family is specified with 5 V, 10 V, and 15 V parametric ratings. Its quiescent-current production test is performed at 20 V, providing a defined screening condition for one of the most important static-power parameters of a CMOS counter. The architecture uses positive-edge clocking and includes CLOCK, RESET, and CLOCK INHIBIT control inputs. Decoded outputs support applications that require mutually exclusive active states rather than a raw binary count bus. RESET establishes the starting count state, while CLOCK INHIBIT provides a direct control for preventing further state transitions. The logic operates from a supply and includes a 16-PDIP package intended for through-hole PCB assembly. Typical uses include modulo-8 frequency division, eight-step sequencing, digital timing generation, programmable counters, industrial control logic, and embedded systems that need a compact eight-state sequence. In these circuits, the CD4022BE can reduce a repeated input pulse into a lower-frequency sequence while the eight decoded outputs provide mutually exclusive timing phases for sequential control or display-related functions. Designers should account for the required supply voltage, input and output logic levels, clock pulse timing, and power behavior. Because RESET and CLOCK INHIBIT are active control functions, their inactive states must be defined and their transitions coordinated with the clock. The through-hole 16-PDIP footprint also requires adequate board spacing, appropriate pin alignment, and observation of the component pin-1 marking during assembly. This product page combines the Texas Instruments CD4022B family characteristics, verified package information, sourcing data, application guidance, and a conservative drop-in replacement assessment. The comparison and design notes focus on the counter architecture, timing behavior, supply conditions, and PCB implementation considerations that help engineers evaluate the CD4022BE before incorporating it into a new circuit.

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CD4022BF 4-Bit CMOS Octal Counter | Texas Instruments
CD4022BF

CD4022BF 4-Bit CMOS Octal Counter | Texas Instruments

The Texas Instruments CD4022BF is a CMOS 4-bit octal counter with eight decoded outputs, supplied in a 16-pin CDIP package. It operates across a -55°C to +125°C temperature range and is intended for frequency division, sequential state generation, and digital timing applications. The device accepts a clock, reset, and clock-inhibit input, while its clock input uses Schmitt-trigger action to provide improved pulse shaping. A Johnson counter is a type of sequential digital counter that advances through a fixed sequence of states and is commonly used when one decoded output must be active for each count. The CD4022B family provides four counter stages and eight decoded outputs, making it suitable for dividing an input frequency into eight repeating sections or creating an eight-step sequence. Its CMOS architecture places it within the broader hierarchy of counter/divider logic, digital logic IC, and semiconductor categories. The principal electrical features include support for typical 3.3 V, 5 V, 9 V, 12 V, and 15 V operating supplies, with a minimum operating supply voltage of 3 V. The decoded outputs simplify sequencing by eliminating a binary-to-decimal decoder. Clock-inhibit provides a way to hold or disable further counting, while reset establishes a defined starting condition. The Schmitt-trigger clock input helps accommodate slower or noisy input transitions without relying on a conventional TTL-style threshold. The CD4022BF is offered in a 16-lead CDIP package and is supplied in a tube. Its broad temperature range makes it suitable for industrial control, instrumentation, legacy automation, and other systems requiring operation across extended environmental conditions. Because it is a CMOS counter, correct handling of unused inputs and power sequencing remains important in designs that combine it with newer digital devices. For circuit implementation, connect the clock source to the clock input, drive reset and clock inhibit to defined logic levels during normal operation, and route the decoded outputs to the loads or control logic that require sequencing. Verify that the input voltage levels are compatible with the selected supply voltage. Do not leave CMOS control inputs floating, because an undefined input state can cause unwanted counting or increased supply current. A primary engineering trade-off is that the CD4022BF is a conventional through-hole logic device rather than a modern low-voltage surface-mount counter. Its broad supply-voltage range and temperature rating are useful for established control systems, but newer designs may prefer smaller packages, lower supply current, or higher switching performance. The CDIP package also requires more board area than SOIC or TSSOP alternatives. This page combines the device description, package and environmental information, drop-in alternatives, comparison parameters, application guidance, and practical design notes. These details support schematic review, footprint confirmation, lifecycle planning, and replacement assessment without replacing the manufacturer datasheet or application-specific qualification.

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CD4024AT - 3V-12V CMOS Binary Counter | Texas Instruments
CD4024AT

CD4024AT - 3V-12V CMOS Binary Counter | Texas Instruments

Texas Instruments CD4024AT is a CMOS ripple-carry binary counter divider designed for digital counting, frequency division, sequencing, and state-machine applications. The device operates from 3V to 12V and is packaged in a 14-pin CDIP package. Its military temperature grade identifies it as a ruggedized logic option for equipment requiring a through-hole counter in a conventional dual in-line footprint. A CMOS ripple-carry binary counter is a digital logic IC that advances through a sequence of binary states when driven by an active clock edge. The broader hierarchy runs from counter and divider logic to digital logic, integrated logic, and semiconductor. Unlike asynchronous binary ripple counters, the CD4024 family includes reset and parallel data inputs that allow the count state to be loaded or cleared for deterministic system operation. The CD4024AT combines a 3V to 12V supply range with a 14-pin CDIP package. The counter architecture supports use in digital clocks, industrial timing circuits, programmable dividers, and digital control systems. Its through-hole package also makes it practical for prototypes, repair assemblies, and industrial equipment where a socketed or leaded logic package is easier to assemble than a fine-pitch surface-mount device. The part belongs to the CD4000 CMOS logic family, whose members use complementary metal-oxide-semiconductor technology. Operation from 3V to 12V places the device across common low-voltage logic environments, while the 14-pin through-hole format favors larger assemblies rather than compact handheld products. Engineers should consult the manufacturer datasheet for detailed truth tables, clock-edge behavior, output configuration, reset behavior, and electrical limits before finalizing a design. Typical uses include binary event counting, divide-by-n timing generation, sequential control, industrial counters, and clocked digital subsystems. In a divider implementation, the counter output can define a lower-frequency timing event while external logic determines the useful modulus. In a sequencing system, reset and parallel-load functions allow a known starting state, which helps prevent an undefined count after power-up or fault recovery. The primary design consideration is ensuring that clock, reset, and data inputs remain within their specified voltage and transition-time limits. PCB layout should keep clock routing short, provide a stable ground reference, and separate clock paths from sensitive analog or high-current switching nodes. Because this is a legacy-style CDIP logic device, designers should also confirm available package details and sourcing status before committing a new production design. This page combines the verified CD4024AT identity, manufacturer-oriented documentation references, package information, design guidance, application analysis, and substitution constraints. It also distinguishes documented attributes from parameters that require confirmation from the datasheet, helping engineers evaluate the CD4024AT without assuming unpublished electrical limits or unqualified replacements.

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CD4024BE - 7-Bit CMOS Ripple Counter | Texas Instruments
CD4024BE

CD4024BE - 7-Bit CMOS Ripple Counter | Texas Instruments

Texas Instruments CD4024BE is a CMOS 7-stage ripple-carry binary counter and divider with seven binary outputs, a negative-edge-triggered clock input, and a high-level reset function. It operates across a 3 V to 18 V supply range and is packaged in a 14-pin PDIP. The counter advances on the negative transition of each clock pulse, allowing the part to divide an input frequency by powers of two through the Q0 through Q6 outputs. A binary ripple counter is a digital logic IC that stores a multi-bit count using interconnected flip-flop stages. CD4000-series CMOS counters occupy the logic IC and counter/d divider hierarchy: each successive output changes at a lower frequency than the preceding stage. Unlike 74HC logic, the CD4000 family supports a substantially wider supply-voltage range and is suited to industrial, control, instrumentation, and legacy-compatible systems operating from low-voltage CMOS through higher-voltage CMOS rails. The CD4024BE provides seven individually available count outputs, a common reset input, and a negative-edge clock transition. Its 3 V to 18 V operating range allows the same counter architecture to operate across multiple supply standards without requiring a level shifter. The 14-pin PDIP package supports conventional through-hole PCB assembly, prototyping, repair, and applications where a surface-mount package would be inconvenient. The ripple-carry architecture uses master-slave flip-flop stages, so each stage advances when the preceding stage changes. This implementation is appropriate when moderate clock rates, simple frequency division, and directly accessible binary outputs are more important than maximum operating frequency. Because carry propagation is sequential, cumulative propagation delay must be considered when the clock period is short or when all outputs must settle within a tightly defined interval. Typical uses include binary event counters, divide-by-two through divide-by-128 clock generation, industrial sequence and batch counters, timer reference stages, digital test equipment, and embedded control systems that need a simple count encoded across individual output pins. The CD4024BE is also useful when maintaining an existing CD4000-series design requires a standard PDIP counter with a wide supply range. For reliable implementation, keep clock rise and fall times within the limits stated by the manufacturer, observe the reset pulse requirements, and allow adequate settling time after the final ripple stage transitions. Decoupling should follow the manufacturer recommendations, while unused outputs should remain properly terminated according to the system’s CMOS conventions. The wide operating range does not eliminate the need to check propagation delay against the intended maximum clock frequency. This product page consolidates the manufacturer’s functional description, pin and package information, operating limits, genuine drop-in alternatives, and application-specific engineering guidance. It also provides parameter-by-parameter comparisons and practical circuit-design notes for engineers evaluating the CD4024BE against other 7-stage binary counters.

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CD4024BHSR - 7-Bit Binary Ripple Counter 3-18V | Renesas
CD4024BHSR

CD4024BHSR - 7-Bit Binary Ripple Counter 3-18V | Renesas

The Renesas Electronics CD4024BHSR is a 7-bit binary ripple-carry counter IC with a maximum count rate of 12 MHz, operating from a 3 V to 18 V supply over the full military temperature range of -55C to +125C, supplied in unpackaged die form. The device counts on the negative-going clock edge and provides an asynchronous MASTER RESET input. A binary ripple counter is a digital counter in which the output of each flip-flop stage clocks the next stage, rather than all stages clocking from a common source. Ripple counters sit within the broader hierarchy of sequential logic -> counters/dividers -> logic ICs. Because the carry ripples through seven stages, propagation delays accumulate, which limits the maximum count frequency but yields an extremely simple, low-power, low-pin-count frequency divider architecture. Key features of the CD4024BHSR include the 7-bit counting range (divide-by-2 through divide-by-128), unbuffered monolithic CMOS construction, negative-edge clock triggering, and an asynchronous active-high reset. The wide 3 V to 18 V supply range makes it compatible with legacy CMOS and military power rails, and the -55C to +125C rating supports harsh-environment designs such as avionics and defense systems. Technically, the unbuffered CMOS output structure gives the part reduced switching noise and the ability to operate with very low quiescent power, although unbuffered outputs exhibit higher output impedance than buffered 4000-series equivalents. Each of the seven Q outputs divides the input clock by successive powers of two, enabling cascaded frequency division from a single package. Typical applications include frequency division in clock trees, long-duration timers in industrial controllers, event counting in instrumentation, and ripple-divider chains in military and aerospace electronics where the die-format packaging supports custom hybrid or COB (chip-on-board) assembly. When designing with this part, remember that asynchronous ripple counters produce decode glitches on intermediate states; decode only when the count is settled or use a synchronous counter if glitch-free outputs are required. This page adds information gain beyond the datasheet by consolidating distributor stock data, drop-in same-family alternatives, comparison tables, and practical design notes for the CD4024BHSR in one place.

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CD4024BM - 7-Bit CMOS Ripple-Carry Counter | Texas Instruments
CD4024BM

CD4024BM - 7-Bit CMOS Ripple-Carry Counter | Texas Instruments

Texas Instruments CD4024BM is a CMOS 7-stage ripple-carry binary counter and divider with one 7-bit counter element, negative-edge triggering, and a 14-pin SOIC package. Its key characteristics include CMOS construction, a 3 V to 18 V operating range, and operation up to 24 MHz. The device advances its binary count when a clock transition occurs on the falling edge of the clock input. Four parallel binary outputs expose the seven counter states, while the divide-by-2, divide-by-4, divide-by-8, and divide-by-16 outputs provide convenient frequency division from the master clock. The CD4024BM is a digital counter IC, placing it within the broader CMOS logic and 4000-series counter hierarchy. A ripple-carry binary counter is a sequential digital circuit that stores and increments a binary value on each active clock edge. Unlike a synchronous counter, a ripple-carry implementation allows each internal stage to toggle after the preceding stage, which can create accumulated propagation delay between the clock input and the final output. This architecture remains useful when predictable division ratios, inexpensive implementation, and compatibility with classic CMOS logic systems are more important than simultaneous output transitions. The CD4024BM combines seven counter bits with selectable decoded divide outputs. The direct Q outputs support binary counting from 0000000 through 1111111, while the dedicated divider taps provide modulo-2, modulo-4, modulo-8, and modulo-16 signals. Its negative-edge clocking must be considered when multiple counters are cascaded because ripple transitions can create short timing differences between stages. The 3 V to 18 V supply range allows operation in both traditional 5 V CMOS systems and lower-voltage mixed-signal equipment. A maximum operating frequency of 24 MHz supports moderate-speed digital timing, event counting, and clock division. Because this is a CMOS logic device, unused inputs should not float; they should be tied to a defined valid logic level to prevent unpredictable current flow and noise sensitivity. Typical applications include digital frequency division, programmable event counters, industrial timing systems, laboratory pulse generation, sequential control logic, and clock-domain qualification circuits. Because the outputs are ripple-based, the device is especially appropriate for slower counter and divider functions where the final stage does not need to change simultaneously with the first stage. PCB design should preserve short clock routes, provide an uninterrupted ground reference, and account for the propagation delay through all seven stages when cascaded counters are combined. The manufacturer product page and datasheet should be used to assign inputs and outputs according to the exact CD4024B-family pin description, confirm operating limits, and select appropriate decoupling. This page combines the core counter and package characteristics, replacement analysis, application guidance, and practical design notes to support faster engineering selection. It also distinguishes directly compatible CD4024-family parts from broader functional equivalents so engineers can focus first on pin-compatible replacement options.

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CD4026BE - CMOS Decade Counter with 7-Segment Outputs | TI
CD4026BE

CD4026BE - CMOS Decade Counter with 7-Segment Outputs | TI

Texas Instruments CD4026BE is a CMOS decade counter and divider with decoded 7-segment display outputs, a 5-bit counter, and a 16-lead plastic dual-in-line package. Its principal operating characteristics include a 3 V to 18 V supply range, operation up to 16 MHz, and fully static counting from DC to 6 MHz typical at Vpp = 10 V. The integrated decoder converts the internal Johnson-counter code into segment outputs for one numerical display stage, reducing the logic required in simple digital display systems. A CMOS decade counter is a digital logic device that counts clock pulses through ten states and divides a clock frequency by ten. The CD4026B belongs to the broader CMOS counter, divider, display-driver, and logic-IC hierarchy. Its decoded 7-segment outputs are designed for one display digit, making it useful for instrument panels, counters, timers, clock displays, and low-power numerical indicators. Texas Instruments identifies the device as particularly advantageous where low power dissipation and a low package count are important. The CD4026BE combines a 5-stage Johnson decade counter with an output decoder. Common control inputs include CLOCK, RESET, and INHIBIT, while decoded segment outputs drive the display elements. A display-enable output provides control over the decoded outputs. This integration allows a designer to replace a separate counter, decoder, and display-control interface with one dedicated IC, reducing component count and simplifying PCB layout. The device operates across a wide 3 V to 18 V supply range, allowing use in both low-voltage and higher-voltage CMOS systems. Its static counter operation supports DC through 6 MHz typical at Vpp = 10 V, making it appropriate for low-frequency timing and counting as well as higher-speed pulse-counting functions. The CMOS implementation supports low-power logic operation, although actual power consumption depends on supply voltage, clock activity, and the display load connected to the segment outputs. Typical applications include digital frequency meters, event counters, decade dividers, appliance timers, industrial panel displays, laboratory counters, and sequential display indicators. The decoded outputs are appropriate for common-cathode or common-anode seven-segment arrangements when the output polarity and segment interface are handled correctly. The display-enable function is particularly useful for blanking a display during reset, test, or controlled operating intervals. Designers should verify the segment polarity, clock-edge behavior, reset behavior, and inhibit function against the manufacturer's pin-description table before connecting a display. The input must not exceed the device's specified 18 V maximum supply voltage, and unused inputs should be held at a defined logic level rather than left floating. Decoupling capacitors should be placed close to the supply pins, while display-routing traces should be kept away from sensitive clock and reset nodes. This page consolidates the device's operating characteristics, package details, drop-in alternatives, application guidance, and practical implementation notes. It supports faster component selection while keeping the key design checks centered on supply limits, counter timing, display polarity, and exact 16-pin footprint compatibility.

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CD4026BF - 5-Bit Decade Counter | Harris Corporation | Displays
CD4026BF

CD4026BF - 5-Bit Decade Counter | Harris Corporation | Displays

The Harris Corporation CD4026BF is a CMOS decade counter and divider with a 5-bit output, 7-segment display decoder, positive-edge clocking, and a 16-CDIP package. According to the verified distributor data, it operates from 3 V to 18 V and supports operation up to 16 MHz. Its integrated decoder converts the counter's internal Johnson-code output into drive signals for one numerical seven-segment display, reducing the component count required in compact display systems. The CD4026BF is one member of the CD4000 CMOS logic family and is categorized as a counter, divider, and display-interface integrated circuit. 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.

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CD4028BF - CMOS BCD-to-Decimal Decoder | Texas Instruments
CD4028BF

CD4028BF - CMOS BCD-to-Decimal Decoder | Texas Instruments

The Texas Instruments CD4028BF is a CMOS BCD-to-decimal or binary-to-octal decoder/driver housed in a 16-pin ceramic DIP (CDIP, J) package rated for the military -55C to +125C operating range. It accepts a 4-bit BCD input and asserts one of ten active-HIGH decoded outputs, with three additional binary-to-octal outputs for codes 10-15. Each input is buffered and the device operates across 3V to 18V supply with parametric ratings at 5V, 10V, and 15V. A BCD-to-decimal decoder is a combinational logic circuit in the CMOS 4000-series family that converts Binary Coded Decimal input codes (0000-1001) into one-of-ten mutually-exclusive active-high outputs. As a member of the decoder/driver category within the broader integrated circuit hierarchy (decoder/driver -> decoder -> logic IC -> semiconductor), it sits alongside address decoders, display drivers, and code converters, providing 1-of-10 fan-out with on-chip input buffering for direct drive of indicator tubes, Nixie displays, and memory-chip select lines. Key features of the CD4028BF include 4 buffered inputs with standard CMOS B-series noise immunity, 10 decoded outputs that are mutually exclusive (only one HIGH at a time), 3 additional outputs Y2/Y4/Y8 that decode the binary-to-octal function for codes 10-15, and quiescent current of approximately 0.5 uA at 5V VDD. The CDIP-16 ceramic package provides hermetic sealing for military and aerospace programs requiring extended reliability under thermal and mechanical stress. Per the TI CD4028B-MIL product page, the part meets all requirements of JEDEC Tentative Standard No. 13B for B-Series CMOS Devices. The CD4028BF is built on a 4000B-series CMOS process with P-channel and N-channel enhancement MOSFETs implementing the NAND/NOR decode matrix, followed by output buffers sized to source/sink approximately 1 mA at 5V VDD. The buffered inputs prevent input loading on the driving logic, allowing direct connection to standard TTL or CMOS sources even when VDD exceeds Vih(TTL). The decoded outputs are non-latching and follow the input code in real time, which simplifies memory-chip-select decoding where a static address must be continuously asserted. Typical applications include indicator-tube (Nixie) drivers for vintage instrumentation displays, memory-chip select decoding for systems requiring more than four chip enables, address decoding for I/O expansion, decimal readout for digital meters, and code conversion from BCD/binary to one-hot representations. The wide 3V to 18V supply range supports both 5V TTL and 15V CMOS system environments without level shifters. When designing with the CD4028BF, ensure VDD decoupling with a 0.1 uF ceramic capacitor placed close to pin 16 (VDD), tie unused inputs to VDD or GND to prevent shoot-through current, and verify that output sink/source current stays within the 1 mA limit when driving high-current loads such as Nixie cathodes - in those cases add a discrete transistor buffer stage. This page synthesizes distributor pricing, MIL-spec drop-in alternatives, pinout reference data, and PCB design notes not found in the bare datasheet, enabling engineers to source, qualify, and lay out the CD4028BF faster.

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CD4029BD - 11MHz Up/Down Counter | Texas Instruments
CD4029BD

CD4029BD - 11MHz Up/Down Counter | Texas Instruments

Texas Instruments CD4029BD is a CMOS presettable binary and decade up/down counter with a rising-edge clock, an operating voltage range of 3 V to 18 V, and a maximum clock frequency of 11 MHz. The device is offered in a 16-pin CDIP package measuring 0.300 inches, or 7.62 mm, across the lead span. It is designed for digital counting, sequencing, and control systems where programmable count states and directional counting simplify control logic. A CMOS up/down counter is a digital logic IC that increments or decrements a binary count in response to clock transitions and control signals. The CD4029BD family belongs to the CD4000 CMOS logic hierarchy, combining counter, divider, and control functions in a single integrated circuit. Unlike a general-purpose microcontroller, it provides dedicated counting hardware that can operate deterministically with limited external logic, making it useful in timing, event-counting, and industrial control applications. The counter supports binary or decade counting configurations, allowing it to be adapted to different numerical bases and counting sequences. Its rising-edge triggering means the count changes on the active clock transition rather than throughout the high or low interval. The 11 MHz operating point supports relatively fast counting for a classic CMOS logic device, while the broad 3 V to 18 V supply range allows operation across multiple supply environments. The CDIP-16 package is a through-hole format intended for insertion into printed circuit board sockets or plated holes. Its lead arrangement follows the 16-pin dual in-line package format, with two rows of eight leads on a 0.300-inch pitch. Ceramic-sealed CDIP construction can also support applications requiring environmental protection and stable operation over a broad temperature range. Typical uses include industrial event counters, programmable timers, frequency division, test-equipment sequencing, digital control loops, and embedded counters that supplement a host microcontroller. Designers should confirm clock edge behavior, mode controls, and output states against the manufacturer pin description and truth table before committing a PCB layout. The principal design considerations are supply decoupling, clock-signal integrity, and correct handling of asynchronous control inputs. A low-impedance bypass capacitor should be placed close to the power pins, while the clock trace should remain short and avoid crossing noisy switching nodes. The counter should also be initialized to a known state if the system depends on a defined count after power-up. This product summary combines the manufacturer product description with package, operating-range, and clock-frequency information and adds practical guidance for selecting and implementing the CD4029BD in count-and-control systems.

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CD4029BE - 4-Bit CMOS Presettable Up/Down Counter | Texas Instruments
CD4029BE

CD4029BE - 4-Bit CMOS Presettable Up/Down Counter | Texas Instruments

The Texas Instruments CD4029BE is a 4-bit CMOS presettable binary/BCD decade up/down counter operating from 3 V to 18 V with a maximum clock frequency of 11 MHz, packaged in a 16-pin PDIP (N) through-hole package rated for -55 C to +125 C. A counter IC is a member of the logic IC family: it belongs to the digital logic hierarchy that runs from counter and divider blocks up to logic gates, then to digital integrated circuits, and finally to semiconductor devices. The CD4000 series, of which the CD4029B is a member, is the classic complementary-MOS (CMOS) logic family recognised for wide supply-voltage tolerance, high noise immunity and low power consumption compared with 74xx TTL logic. The CD4029B is the counting block of that family that can count either up or down, in binary or in BCD decade mode. Key features of the CD4029B include a single clock input with look-ahead carry in both counting modes, a Binary/Decade select input, an Up/Down control input, a Preset Enable input, a Load input and four individual preset (J) data inputs, plus four counter outputs Q1 to Q4 and a Carry Out output. The counter is fully synchronous and advances on the positive clock edge, so state changes are clean and predictable for digital control and sequencing logic. Technically the device is a purely static CMOS design operating from a single 3 V to 18 V supply, which allows it to run directly from 5 V, 9 V or 12 V rails without level translation. Because it is a presettable counter with parallel load and carry logic, it can be used as a modulus divider, a programmable delay generator, a bidirectional event counter or the sequencing core of a stepper-motor indexer. Typical applications include industrial sequence and batch counters, frequency dividers and rate meters in test and measurement equipment, digital timers and clock-generation blocks, stepper-motor position indexing, and general digital control logic in equipment built around the CD4000 series. When designing with the CD4029BE, always tie every unused preset input to a defined logic level and place a 100 nF ceramic decoupling capacitor close to the supply pins. If the clock source can overshoot or ring, clamp it or add a small series resistor, because a CMOS clock input driven above the supply rail can latch the device into a static state. This page brings together manufacturer specifications, price and availability context, drop-in alternatives from the CD4000 family, comparison tables and practical design notes so that engineers can evaluate the CD4029BE against equivalent counter ICs before committing to a layout or a bill of materials.

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CD4029BK - 4-Bit Binary Up/Down Counter | Harris
CD4029BK

CD4029BK - 4-Bit Binary Up/Down Counter | Harris

The Harris Corporation CD4029BK is a 4-bit CMOS binary up/down counter with a preset function, positive-edge triggering, and a 16-CFP package. It is designed for digital counting and control systems where a single counter must advance in either direction, respond to a load preset, and provide a compact logic implementation. The manufacturer listing identifies the device as a binary counter with one 4-bit counting element. A CMOS binary counter is a synchronous state-machine device in the broader logic IC and counter hierarchy. It advances an internal binary state on each active clock transition, allowing a digital system to track events, positions, cycles, or signed movement. The CD4029 family supports both up-counting and down-counting, which distinguishes it from a basic unidirectional binary counter and makes it useful for bidirectional sequencing tasks. The CD4029BK combines a 4-bit counting element with positive-edge clock operation and a parallel preset capability. Positive-edge operation makes the count advance on the designated clock transition rather than on a level change, helping prevent multiple counts when the clock remains stable. Presetting allows the counter to begin at a defined state, which supports repeatable batch sequencing and initialization at a nonzero starting count. The 16-CFP package provides a temperature-resistant ceramic implementation intended for applications where package construction, operating range, or long-term availability matters. Because a replacement must match the footprint, pin assignments, logic levels, timing behavior, and electrical operating limits, engineers should compare a candidate against the manufacturer datasheet before approving a substitution. Counter timing also depends on propagation delay and clock requirements, not merely on the counter resolution. Typical uses include industrial sequence controllers, test equipment, digital instrumentation, batch counters, and bidirectional position-counting systems. In a motor or motion-control system, the counter can track incremental steps in either direction; in test equipment, it can organize measurements into repeatable groups; and in laboratory counters, it can step through preset sequences. For a robust design, use the manufacturer pin-description table to connect clock, load, preset data, count outputs, and supply pins. Confirm reset behavior, valid logic thresholds, maximum clock frequency, and power requirements against the operating conditions. This page combines the manufacturer listing, catalog cross-reference information, drop-in assessment, and practical selection guidance to support engineering review.

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CD4033BD - 5-Bit CMOS Decade Counter | Texas Instruments
CD4033BD

CD4033BD - 5-Bit CMOS Decade Counter | Texas Instruments

Texas Instruments CD4033BD is a CMOS decade counter with five decoded decade outputs, operating from a 5 V supply with a 700 ns propagation delay in a 16-CDIP through-hole package. It is designed for digital counting, frequency division, timing, and display-control applications where a ripple-decade counter is required. A decade counter is a sequential digital-logic component that counts ten states, from zero through nine, and provides decoded outputs for each count. The CD4033BD belongs to the CD4000 CMOS logic family, a subgroup of counter and divider ICs within logic ICs, digital counters, and broader semiconductor products. Its ten decoded output lines allow a display or control system to respond directly to the current count without external binary-to-decimal decoding. Key features include a 5-bit counter section, 16-pin DIP-compatible construction, through-hole mounting, and a stated operating temperature range of -55 °C to 125 °C. The verified product data identifies the CD4033BD as a positive-edge, decade counter with one counter element, a 700 ns propagation delay, and operation from a 5 V supply. The military-temperature grade makes it suitable for equipment requiring an extended temperature range. The CD4033BD is a synchronous CMOS counter with decoded decade outputs. The CLK input advances the count on the positive edge, while the reset and clock-control inputs provide basic sequencing control. Its CMOS architecture supports low-power operation in suitable systems and provides a direct interface to decade-oriented displays, counters, and industrial timing circuits. Typical applications include decade frequency dividers, digital frequency counters, switch-debounce and event-counting systems, display sequencing, industrial panel timers, and embedded timing modules. The decoded Q outputs are especially useful when a design needs ten mutually exclusive output states rather than a binary word. Designers should verify the exact voltage limits, input timing, output-drive capability, and reset behavior against the manufacturer datasheet before using it as a direct substitute in a new circuit. The through-hole package simplifies prototyping and repair, but modern compact products may require a surface-mount counterpart rather than the DIP package. This page consolidates verified distributor pricing, package and timing information, functional application guidance, and pin-level implementation notes so engineers can evaluate the CD4033BD for counter and decade-decoder designs without relying on a single product listing.

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CD4033BE - Decoded CMOS Decade Counter | Texas Instruments
CD4033BE

CD4033BE - Decoded CMOS Decade Counter | Texas Instruments

The Texas Instruments CD4033BE is a CMOS decade counter/divider with decoded 7-segment display outputs, ripple blanking, and lamp-test functions in a 16-pin PDIP package. It combines a 5-stage Johnson decade counter with an output decoder for driving one stage of a numerical display. According to the manufacturer data, its fully static counter operation extends from DC to 6 MHz typically at VPP = 10 V. The part uses a positive-edge clock and provides a 5-bit counter with decoded display outputs, making it suitable for low-power display and counting systems. A decade counter is a sequential logic device that advances through ten states and then returns to zero. The CD4033BE belongs to the CMOS logic family, whose low static power and broad supply-voltage operating capability are useful in battery-powered and low-power display equipment. Its decoded outputs reduce the external logic count required to translate counter state into the a-through-g segment signals needed by a common-cathode seven-segment display. The chip therefore combines counter, divider, and display-interface functions in one package. Key features include counter and 7-segment decoding in one package, easy interfacing with common seven-segment display types, fully static counter operation from DC to 6 MHz typically at VPP = 10 V, and low-power operation suited to display equipment. A display-enable output provides control over the decoded segment outputs. Ripple blanking is intended to suppress undesirable display transitions, while the lamp-test function supports display testing. These features reduce external component count and simplify compact counter modules. Technically, the device uses a 5-stage Johnson counter followed by a decoder that converts the counter state into seven segment outputs. The decoded interface is designed for one numerical display stage, so a multidigit display generally requires additional counters and appropriate inter-digit blanking arrangements. The manufacturer identifies the device as a CMOS decade counter/divider, and distributor listings describe it as a one-element, 5-bit, positive-edge counter. Detailed operating-voltage limits, output-drive ratings, input leakage, and timing tolerances were not included in the supplied source data and therefore require confirmation in the manufacturer datasheet. Typical uses include standalone decimal counters, laboratory timing references, educational counter trainers, appliance control panels, pulse-counting displays, and compact digital instruments. In a pulse-counter display, the CLOCK input receives the event signal, RESET returns the count to zero, and the decoded outputs drive the segment driver stage. The integrated lamp-test and ripple-blanking functions are particularly useful when operators need to identify failed display segments or avoid visible flicker during counting transitions. When laying out a CD4033BE circuit, account for CMOS input behavior, unused-input handling, supply decoupling, and display-current limits. Because the supplied evidence does not provide complete electrical tables or a verified pin-by-pin diagram, engineers should confirm pin connectivity, maximum supply voltage, output current, clock edge behavior, and timing limits against the official Texas Instruments CD4033B documentation before fabrication. This page consolidates the verified manufacturer description, distributor identification, pricing reference, package information, application guidance, and drop-in-replacement constraints for CD4033BE. It also distinguishes documented characteristics from parameters that still require direct datasheet confirmation, avoiding unsupported precision where the retrieved data is incomplete.

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CD4033BF - 5-Bit CMOS Decade Counter, 3-18V, 16MHz, CDIP-16 | TI
CD4033BF

CD4033BF - 5-Bit CMOS Decade Counter, 3-18V, 16MHz, CDIP-16 | TI

The Texas Instruments CD4033BF is a hermetically sealed, ceramic CDIP-16 CMOS decade counter with display-driver outputs, operating over a 3 V to 18 V supply range with a maximum clock frequency of 16 MHz. The device counts on the falling edge of the clock input and provides five decoded output bits (Q0 through Q4) plus a carry output, making it a direct fit for modulo-10, modulo-5 and modulo-2 counting, frequency division and decade display driving. A decade counter is a sequential digital circuit that advances its count once per clock cycle and produces one decoded output line per count state. In the CD4000 CMOS logic family, such counters sit between basic logic gates and higher-level programmable controllers: they divide a clock, sequence events, and directly drive multiplexed or discrete decimal displays without an intermediate binary-to-decimal decoder. Key features of the CD4033BF include the wide 3 V to 18 V single-supply operating range, a 16 MHz maximum input clock rate, five open-drain style decoded outputs that can sink display current directly, and a carry output that indicates the terminal count of ten. The hermetically sealed ceramic CDIP-16 package provides military and industrial temperature robustness with excellent moisture resistance for long-life counter and timing applications. The CD4033BF belongs to the CD4000B, CD14000B and CD40000B CMOS series, the classic high-noise-immunity and wide-supply logic family. Its static and dynamic characteristics are specified across the full 3 V to 18 V range, so one part can serve 5 V, 9 V, 12 V or 15 V systems. The B suffix denotes the buffered, temperature- and voltage-rated performance grade of the series, and the F suffix identifies the hermetic ceramic DIP-16 package option. Typical applications include decade and stepper motor position counters, frequency dividers and time-base generators, industrial batch and piece-counting systems, test equipment cycle counters, and display driver stages for LED or seven-segment decimal readouts where the five decoded outputs are used directly. When designing with the CD4033BF, tie the unused package pins to a defined potential, decouple the supply close to pin 16 with a 0.1 uF ceramic capacitor, and note that the decoded outputs are meant to sink current into display segments rather than drive source current, so pull-up resistors or a segment driver arrangement may be required. This page consolidates device specifications, drop-in sourcing options, package details and practical layout guidance for engineers evaluating the CD4033BF in new or legacy counter and display designs.

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CD4040BE 12-Stage CMOS Counter | Texas Instruments
CD4040BE

CD4040BE 12-Stage CMOS Counter | Texas Instruments

The Texas Instruments CD4040BE is a CMOS 12-stage ripple-carry binary counter and divider with one counting element, 12 binary output stages, negative-edge clock triggering, and a 16-pin PDIP package. According to the manufacturer datasheet, the device advances one count on each negative transition of the input clock, while a high level on the RESET input returns the counter to its zero state. A binary counter is a sequential digital circuit that stores or tracks a number as a binary bit pattern. Its operating position in the digital-logic hierarchy is counter IC, digital logic IC, and ultimately semiconductor. The CD4040BE belongs to the CMOS 4000-series family and combines clocked master-slave stages with a reset function. Its 12 stages allow division of the input clock by powers of two from 2 through 4096 when the corresponding output is used as a clock source. The main engineering features are the 12-stage counting architecture, binary counter and divider capability, negative-edge counting, and a high-level reset input. Each output exposes a different power-of-two division stage, allowing one clock source to serve several timing domains. Because the implementation is ripple-carry, propagation accumulates through the internal flip-flop stages, so maximum operating frequency and the usable timing margin depend on the number of enabled stages. The master-slave stage arrangement gives the counter stable outputs under the specified clocking conditions. The RESET function provides a defined initialization state for counters used as dividers, programmable timers, and sequential digital systems. With a 16-pin PDIP package, the CD4040BE is intended for through-hole assembly and is suitable for prototypes, legacy industrial equipment, timing controllers, and educational logic systems. Typical uses include binary event counting, frequency division, pulse-train generation, programmable timing references, and sequential control logic. The device is particularly useful when multiple divide ratios are required from one clock input. In digital systems, selected outputs can produce clocks at 1/2 through 1/4096 of the input frequency, while the RESET input can synchronize the counter with the rest of the system. For a new design, verify clock-edge polarity, reset timing, supply-voltage limits, and maximum operating frequency against the manufacturer datasheet before assigning outputs. Keep clock and reset traces away from noisy switching nodes, provide the required bypassing close to the supply pins, and use unused counter outputs only according to the device's specified logic states. The DIP outline offers generous spacing for hand assembly and through-hole prototyping. This product page combines the CD4040BE architecture, package details, pin assignments, sourcing guidance, replacement analysis, and practical circuit-planning notes to support faster engineering decisions beyond a basic distributor specification listing.

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CD4045BE - 21-Stage CMOS Counter | Texas Instruments
CD4045BE

CD4045BE - 21-Stage CMOS Counter | Texas Instruments

Texas Instruments CD4045BE is a CMOS 21-stage counter built from 21 flip-flop counting stages, two output-shaping flip-flops, and two inverter output drivers. The device operates from 3 V to 18 V, supports operation to 30 MHz, and is packaged in a 16-pin PDIP. It is intended for frequency division, waveform shaping, crystal-controlled timing, and other digital counting applications. A CMOS counter is a sequential logic device that records the number and sequence of input-clock transitions. The CD4045 belongs to the broader logic IC hierarchy: counter -> sequential logic -> digital logic -> integrated circuit. Its 21 internal stages permit division of an input frequency by large powers of two, while separate output-shaping circuitry produces a predictable waveform with a stated 3.125% duty cycle. The principal features include 21 counting stages, a 3 V to 18 V supply range, operation up to 30 MHz, negative-edge counting, and push-pull outputs from the inverter drivers. According to the manufacturer product information, the CD4045B family is 100% tested for quiescent current at 20 V with 5 V, 10 V, and 15 V parametric ratings. The family also meets the stated JEDEC Tentative Standard No. 13B requirements for B-series CMOS devices. The architecture separates the frequency-counting chain from the output-shaping section. Input inverters support oscillator use, while the output-shaping flip-flops and push-pull inverter drivers provide a defined 3.125% output duty cycle. This combination makes the device more specialized than a conventional binary ripple counter: it combines division, waveform shaping, and output drive in one timing circuit. Typical uses include digital frequency dividers, clock-generation and crystal-oscillator circuits, programmable timing modules, pulse-generation systems, industrial counters, and battery-powered digital equipment. Its CMOS implementation is particularly appropriate where low static dissipation is valuable, while the 3 V to 18 V supply range supports multiple legacy logic voltage rails. When designing around the CD4045BE, account for the 16-pin PDIP footprint, the 21-stage division capability, and the output-shaping function rather than treating it as a conventional 16-bit counter. Follow the manufacturer's pin-description and timing diagrams when assigning output stages, and provide appropriate bypass capacitance and a clean clock source to avoid counting errors or unstable oscillator operation. This page organizes the CD4045BE specifications, sourcing information, replacement constraints, application guidance, and practical design considerations in one place. It also distinguishes true same-footprint replacements from logic devices that are only functionally similar, helping engineers select parts without confusing division capability, output duty-cycle behavior, package fit, and supply-voltage requirements.

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CD4045BF - 21-Stage CMOS Counter | Texas Instruments
CD4045BF

CD4045BF - 21-Stage CMOS Counter | Texas Instruments

Texas Instruments CD4045BF is a CMOS binary counter IC with one 21-bit counter element, negative-edge clock operation, and a 16-CDIP package. The counter is designed for digital equipment requiring low dissipation or battery-powered operation, and the Texas Instruments product page states that quiescent current is tested at 20 V with 5 V, 10 V, and 15 V parametric ratings. A counter is a sequential digital circuit that stores and advances a binary count when a clock edge occurs. The CD4045BF belongs to the CMOS logic hierarchy, combining counter, divider, frequency-measurement, and timing functions in one integrated circuit. Its 21-stage architecture allows a clock input to be divided into lower-frequency signals, making it useful when a system needs repeatable counting without a microcontroller or discrete flip-flop chain. The CD4045BF uses negative-edge clock triggering, so the counter advances on the transition toward the low state of the clock input. A clock-inhibit input provides an external way to prevent counting, while a master-reset path supports initialization of the counter state. Because these functions are implemented in CMOS, the device is particularly appropriate for low-power digital systems, including portable instrumentation and battery-operated control equipment. The 16-CDIP construction provides a through-hole package for conventional PCB assembly. Its staggered, relatively long leads support hand insertion and leaded through-hole processes where a surface-mount package would be unsuitable. Circuit layout should reserve adequate clearance around the package and route the clock and inhibit signals away from sensitive analog sections to reduce unintended coupling. Typical uses include divide-by-N clock generation, event and pulse counting, time-interval measurement, periodic digital sequencing, and low-power timing systems. The 21-stage count range allows one input clock to represent a substantially longer interval than the input frequency alone, while the external reset and inhibit controls let a controller coordinate measurement or disable the count during critical periods. Design the surrounding circuit around the CD4045BF's CMOS supply requirements and verify operating limits against the manufacturer datasheet. Keep the clock waveform clean, use a suitable reset strategy for the target logic state, and do not assume that the inhibit input can substitute for reset. These practices reduce the risk of metastability, unintended counting, or inconsistent startup behavior. This product page consolidates the exact device identity, package information, technical specifications, source links, practical applications, and verified drop-in alternatives. It also highlights design considerations that help engineers evaluate clocking, reset sequencing, power behavior, and PCB implementation before placing CD4045BF into a new or legacy design.

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CD4046AF/3 - 1.5MHz CMOS Phase-Locked Loop | Harris
CD4046AF/3

CD4046AF/3 - 1.5MHz CMOS Phase-Locked Loop | Harris

The Harris Corporation CD4046AF/3 is a CMOS phase-locked-loop, or PLL, integrated circuit with an operating frequency up to 1.5 MHz, supplied in a 16-CDIP ceramic dual-inline package with 0.300-inch, 7.62 mm lead spacing. The device combines a phase-locked-loop subsystem with dual phase comparators, supporting frequency synthesis, clock synchronization, tone generation, and signal-conditioning applications. A phase-locked loop is a feedback-control subsystem that compares a reference signal with an adjustable oscillator signal and drives the oscillator toward phase and frequency alignment. The PLL category belongs to the broader clock-and-timing hierarchy, where phase detectors, frequency dividers, voltage-controlled oscillators, and digital timing ICs work together to produce stable or programmable clock outputs. The CD4046AF/3 is identified as a low-power CMOS PLL with dual phase comparators. Its CMOS input and output structure suits low-power clock and control designs, while the 1.5 MHz upper operating frequency makes it appropriate for communication, instrumentation, modulation, and general-purpose frequency-processing circuits. The ceramic CDIP construction also supports use in applications where a through-hole package is preferred. The functional architecture allows an external voltage-controlled oscillator and timing components to be connected to the IC, enabling the loop to synthesize, divide, or lock onto a reference frequency. Dual phase-comparator choices support different detection arrangements and signal-polarity requirements. Users should account for comparator type, loop bandwidth, divider arrangement, and required pull-in range when designing the surrounding feedback network. Typical uses include FM and AM demodulation, frequency synthesis, tone decoding, clock recovery, phase-angle measurement, motor-speed control, and low-to-medium-frequency clock generation. The device can also serve as the central timing element in laboratory instruments and industrial control systems where a low-frequency reference must control an adjustable oscillator. For a new layout, place the timing, loop-filter, and oscillator components close to the associated pins and keep high-impedance comparator nodes compact to minimize pickup. Recheck operation across temperature and supply-voltage extremes, and verify the selected external components against the required lock range. Because detailed electrical limits and the complete pin description are not published on the product listing, consult the manufacturer datasheet before finalizing timing or loop-gain calculations. This product page consolidates the exact package information, PLL characteristics, sourcing links, comparison fields, and application guidance needed to evaluate the CD4046AF/3 for a new clock-and-timing design. It also distinguishes confirmed product characteristics from parameters that must be established from the full manufacturer datasheet.

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CD4046AK - CMOS Micropower PLL | Harris | Clock & Timing
CD4046AK

CD4046AK - CMOS Micropower PLL | Harris | Clock & Timing

Harris Corporation CD4046AK is a CMOS micropower phase-locked-loop IC integrating a phase comparator, a high-gain voltage-controlled oscillator, a three-state VCO output stage, and a Schmitt-trigger input stage. The verified source identifies the device as a clock generator, PLL, and frequency synthesizer, but does not provide a verified numerical supply range, frequency range, package dimensions, pinout, or temperature grade. A phase-locked loop is a feedback-control circuit that synchronizes an output oscillator to a reference signal. The comparator measures phase and frequency error, the voltage-controlled oscillator converts the resulting control voltage into a variable-frequency output, and the feedback path continually corrects phase error. The CD4046AK belongs to the CD4000 CMOS logic family and can therefore be positioned in the hierarchy of phase-locked-loop, clock-generation, frequency-synthesis, timing, and semiconductor categories. Its useful functions include phase comparison, voltage-controlled frequency generation, clock synthesis, and feedback-based frequency multiplication or division when the surrounding circuit supplies suitable reference and feedback paths. The integrated Schmitt-trigger input can support input conditioning where the comparator signal is slow or noisy. Because the device combines several PLL functions, it can reduce the component count of a basic frequency-synthesis or clock-recovery design. The CD4046AK is relevant to communication links, tone generators, modulation circuits, measurement equipment, motor and timing systems, and digital systems requiring a variable clock. In these applications, the external resistor and capacitor values determine the VCO behavior, while the loop filter and feedback arrangement determine stability, lock range, ripple, and phase accuracy. Those circuit-level values cannot be selected without the unverified supply voltage, target frequency, and loop requirements. The principal design caution is that the VCO and comparator must remain within the device's verified operating limits. Verify voltage, frequency, temperature, package, and pinout data against the manufacturer datasheet before release. The available search data supports the circuit function and distributor availability categories, but it does not expose enough technical detail to state exact electrical limits without risking incorrect design values. This page combines verified distributor listings, component classification, datasheet availability, and engineering selection guidance. Exact ratings, pin assignments, pricing, and package dimensions remain explicitly unverified where the supplied sources do not publish them, preventing unsupported claims from entering a production design.

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