CD4522BE - Programmable BCD Divide-by-N Counter | Texas Instruments
Référence : CD4522BE ✗ Fin de vieCD4522BE Présentation
A programmable BCD counter is a digital logic device that counts in binary-coded decimal form and divides an incoming frequency by a selected count value. The CD4522B belongs to the CD4000 CMOS logic family, combining a decade-counter architecture with programmable count inputs. This places it within the hierarchy of counter IC, logic IC, digital CMOS IC, and semiconductor, making it suitable for both timing and control applications.
Key characteristics include a 3 V to 18 V operating range, a 4-bit counting element, and operation up to 8 MHz according to the manufacturer datasheet family information. The device uses symmetrical output characteristics, and its specified maximum input current reaches 1 microampere at 18 V over the full package-temperature range. At 18 V and 25 degrees Celsius, the stated input current can be reduced to 100 nanoamperes.
The CD4522B family is manufactured in multiple package and ordering configurations. The E suffix identifies the 16-lead dual-in-line plastic package used by CD4522BE. Its through-hole PDIP construction supports conventional PCB assembly and is distinct from the surface-mount options listed for the CD4522B family. The device meets the requirements stated for JEDEC Standard No. 13B for B-series CMOS devices.
Typical uses include programmable frequency division in industrial control equipment, pulse counting in instrumentation, clock and timer sequencing, and divide-by-N logic in test systems. Its broad supply-voltage range allows operation from low-voltage 3 V systems through conventional 5 V and 15 V CMOS environments. The design should account for input transition timing, reset behavior, and the selected count configuration when defining system timing.
For a new PCB, preserve the CD4522BE pin arrangement and verify every connection against the Texas Instruments CD4522B pin-description table. For an existing design, confirm the logic levels, maximum input frequency, operating voltage, and reset requirements before substituting any equivalent. The PDIP package also requires adequate spacing for through-hole insertion and mechanical clearance around the device.
Alternatives de remplacement direct pour CD4522BE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
CD4522BEE4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CD4522BE Valeurs maximales et caractéristiques électriques
| Product Type | Programmable BCD divide-by-N counter IC |
| Logic Family | CMOS CD4000 series |
| Logic Type | Counter IC |
| Counting Elements | 1 element |
| Counter Resolution | 4 bit |
| Counting Direction | Positive or negative |
| Counting System | Programmable BCD |
| Operating Voltage Range | 3 V to 18 V |
| Maximum Frequency | 8 MHz |
| Boîtier | 16-pin PDIP |
| Package Construction | 16-lead dual-in-line plastic |
| Type de montage | Through-hole |
| Output Characteristics | Symmetrical |
| Maximum Input Current at 18 V | 1 uA over full package-temperature range |
| Input Current at 18 V and 25 C | 100 nA |
| Device Standard | JEDEC Standard No. 13B |
| Statut RoHS | RoHS3 compliant |
Guide de configuration des broches du CD4522BE 16-lead dual-in-line plastic
Configuration des broches du CD4522BE (boîtier 16-lead dual-in-line plastic). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour CD4522BE.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
CD4522BE convient pour 6 applications: Programmable Frequency Divider, Industrial Pulse Counting, Digital Clock Sequencing, Instrumentation and Counter Displays, Test and Measurement Trigger Systems, Automotive and Transportation Control Logic.
Programmable Frequency Divider
The CD4522BE is appropriate for dividing a periodic input into a lower program-selected frequency in clocking, pulse-generation, and sequencing systems. Its 3 V to 18 V operating range permits use in 3 V, 5 V, and 15 V CMOS environments, while operation up to 8 MHz provides ample margin for many digital timing chains. The device is placed between the source clock and the downstream timing circuit, with the count inputs programmed for the required division ratio. Designers should verify input transition time, propagation delay, and reset timing against the Texas Instruments CD4522B datasheet before treating the divided output as a precision timebase.
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Industrial Pulse Counting
The CD4522BE can count incoming pulses in industrial instrumentation when the system requires a programmable BCD count and a 3 V to 18 V logic environment. Positive or negative counting capability allows the application to accommodate counting direction, while the 4-bit counting element suits decade-oriented displays, counters, and control interfaces. Its maximum input frequency of 8 MHz defines the upper signal-rate boundary that must be checked against pulse width, edge shape, and propagation delay. The counter should be configured with clean reset behavior and appropriate input conditioning so that mechanical or contact-derived events do not create unintended count transitions.
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Digital Clock Sequencing
The CD4522BE is useful for generating repeatable timing intervals from an input clock in sequencers, controllers, and periodic-event systems. The programmable divide-by-N architecture lets the designer obtain a defined output interval without building a separate bank of discrete counters. Its broad 3 V to 18 V supply range supports mixed legacy CMOS systems, while symmetrical outputs simplify buffering decisions when driving standard CMOS loads. Correct implementation requires reviewing clock-edge requirements, reset assertion, output timing, and the maximum propagation delay in the Texas Instruments CD4522B datasheet. Cascaded stages should also be checked for cumulative delay and duty-cycle distortion.
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Instrumentation and Counter Displays
The CD4522BE can drive BCD-oriented counting and display-control logic when a system requires programmable decade counting rather than binary counting. A four-bit counter output provides a natural interface to BCD decoding and display stages, while the broad supply range permits operation in both modern low-voltage and older 15 V instrumentation. The counter's 8 MHz maximum frequency makes it suitable for counting pulses well above ordinary human-input rates. The system designer must confirm that the downstream decoder uses compatible logic levels and that the counter's output timing, reset release, and output loading meet the display-driver requirements.
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Test and Measurement Trigger Systems
The CD4522BE fits test systems that need to divide, count, or condition repetitive trigger events before sending them to a measurement instrument. The programmable count permits selectable repetition rates, and the 3 V to 18 V supply range allows integration with conventional CMOS instrumentation. Operation up to 8 MHz supports high-rate repetitive test sequences when the source has clean transitions. In a trigger-divider role, the device reduces the event rate presented to the instrument, but engineers should account for propagation delay and reset recovery so that the divided timing remains aligned with the source signal. Shielding and grounding are important when the counter is mounted near high-impedance measurement circuitry.
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Automotive and Transportation Control Logic
The CD4522BE can support low-frequency counting or timing functions in transportation equipment when the complete design is qualified for the required environmental conditions. Its 3 V to 18 V operating range covers several vehicle electrical environments, while positive and negative counting provides flexibility for directional or sequence-dependent events. The 16-pin PDIP package is mechanically robust for through-hole industrial assemblies but may not suit compact automotive PCB layouts. Before deployment, confirm the part's full package-temperature range, electrical characteristics, quality status, and lifecycle conditions against the system specification. Automotive use should never rely solely on a general-purpose logic-device description.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CD4522BE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | CD4522BEE4 |
|---|---|---|
| Package | 16-pin PDIP | 16-pin PDIP |
| Brand | Texas Instruments | Texas Instruments |
| Counter Type | Programmable BCD divide-by-N | Programmable BCD divide-by-N |
| Counting Resolution | 4 bit | 4 bit |
| Operating Voltage Range | 3 V to 18 V | 3 V to 18 V |
| Maximum Frequency | 8 MHz | 8 MHz |
| Logic Family | CMOS CD4000 series | CMOS CD4000 series |
| Special Ordering Configuration | E suffix | E4 suffix configuration |
Principaux différenciateurs
- Programmable BCD divide-by-N counter in a 16-pin PDIP package (vs CD4522BEE4)
- Supports positive and negative count inputs (vs CD4522BEE4)
- Broad CMOS operating range for legacy and modern logic systems (vs CD4522BEE4)
Notes de conception
Use the Texas Instruments CD4522B pin-description table to assign every PCB connection, including clock, count programming inputs, reset, outputs, and supply pins. Place the device away from high-current switching stages, provide a short ground return, and route clock traces away from sensitive analog inputs. Because CD4000-series CMOS devices can respond to slow input edges, use clean logic transitions and maintain the input rise-time limits stated in the manufacturer datasheet.
Validate the clock waveform at the CD4522BE input under worst-case supply and temperature conditions. Operation up to 8 MHz is a headline timing limit, not a guarantee that any waveform will work at that rate. Use a sufficiently fast edge, avoid long point-to-point clock traces, and check propagation delay against reset and output-capture requirements. Cascaded counters require an additional check for accumulated timing displacement between stages.
Do not treat CD4522BE as a generic binary counter or assume the programming-pin functions from another CD4000-series device. Configure the BCD divide count for the intended value, verify the clock and count-input logic states, and confirm reset release timing. Also review the E suffix's full ordering information and package requirements before calling CD4522BEE4 an interchangeable replacement, because its electrical characteristics are not fully identical.
Informations de conformité
RoHS3 compliance is identified for CD4522BE. Other compliance and material-status attributes are not established by the available manufacturer and distribution information.