CD4522BM - 4-Bit Programmable BCD Counter | Texas Instruments
料号： CD4522BM ✓ 量产中CD4522BM 概述
A BCD divide-by-N counter is a digital logic IC that counts in binary-coded decimal and generates a terminal-count indication after a selected number of input transitions. In the broader semiconductor hierarchy, this function belongs to counters and dividers, then to logic ICs, digital semiconductors, and programmable CMOS devices. The CD4522B family is useful where a system must divide a clock into programmable decade-based intervals without requiring a microprocessor or programmable logic device.
The internally synchronous counter architecture supports high internal and external operating speeds, while the logic-edge-clocked design increments on a positive Clock transition or on a negative Clock Inhibit transition. A decoded zero-state output simplifies the end-of-count detection normally required by divide-by-N systems. The verified manufacturer material also states that the device is 100% tested for quiescent current at 20 V and receives parametric testing at 5 V, 10 V, and 15 V, providing useful production-control coverage across common CMOS operating points.
The programmable divide count is configured through the counter's control inputs, while cascade feedback permits multiple counter sections to implement larger division ratios. This architecture reduces the external logic needed for timing dividers, periodic-event generators, sequence counters, and clock-staging circuits. Exact propagation-delay and maximum-frequency limits were not present in the supplied verified snippets and should therefore be confirmed in the manufacturer datasheet before relying on timing margins.
Typical applications include decade counters, programmable frequency dividers, industrial timing modules, digital clock generation, pulse-rate counting, and multistage cascaded division systems. The CD4522BM is particularly appropriate when a fixed, reliable CMOS counter is preferred over software timing, especially where the final count must be electrically programmable rather than fixed in firmware.
Designers should connect the decoded zero output and preset-enable functions according to the intended single-stage or cascade configuration, and should account for supply-voltage-dependent propagation delay in high-speed clock trees. Decoupling capacitors should be placed close to the power and ground pins, while unused inputs must be held at a defined logic level rather than left floating.
This page consolidates verified manufacturer and distributor information, package details, sourcing links, strict drop-in candidates, and practical design guidance. It distinguishes documented characteristics from parameters that still require confirmation from the full CD4522B datasheet, helping engineers make a defensible sourcing and design decision.
直接替换替代料： CD4522BM ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
CD4522BMT
✅ 直接替换📋 参考替代料（不在目录中）
CD4522BMTG4
✅ 直接替换📋 参考替代料（不在目录中）
CD4522BMG4
✅ 直接替换📋 参考替代料（不在目录中）
CD4522BM96
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CD4522B
✅ 直接替换📋 参考替代料（不在目录中）
CD4522BM 最大额定值与电气特性
| Counter Type | Programmable BCD divide-by-N counter |
| Logic Family | CMOS |
| Counting Elements | 1 element |
| Counter Resolution | 4 bits |
| Supply Voltage Range | 3 V to 18 V |
| 工作温度范围 | -55 °C to +125 °C |
| 封装 | 16-pin SOIC (D) |
| 引脚数量 | 16 pins |
| 安装类型 | Surface mount |
| Clocking Method | Logic edge-clocked |
| Clock Increment Edge | Positive Clock transition |
| Clock Inhibit Increment Edge | Negative Clock Inhibit transition |
| Internal Timing Architecture | Internally synchronous |
| Terminal Count Output | Decoded 0-state output |
| Quiescent Current Test Voltage | 20 V |
| Parametric Test Supply Points | 5 V, 10 V, and 15 V |
| Cascading Capability | Supported through cascade feedback |
| RoHS 状态 | Unknown |
| REACH Status | Unknown |
CD4522BM 16-pin soic (d) 引脚配置指南
CD4522BM（16-pin soic (d) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： CD4522BM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CD4522BM 适用于 6 应用s: Programmable Industrial Timing, Digital Clock Generation, Pulse and Event Counting, Cascaded Frequency Divider, Instrumentation Timing Reference, Automotive or Robust Control Timing.
Programmable Industrial Timing
The CD4522BM fits hardware timing systems that divide a periodic input into selectable BCD intervals. Its 4-bit counting element, decoded zero-state output, and programmable divide-by-N operation allow terminal-count events to be generated without continuous software involvement. The verified 3 V to 18 V supply range supports multiple industrial logic levels, while the -55 °C to +125 °C specification covers a broad temperature range. In a timer implementation, the source clock enters Clock, the divide count is programmed through the counter control inputs, and the decoded zero output triggers the next system event. Exact maximum frequency and propagation delay must be obtained from the full manufacturer datasheet before closing the timing budget.
推荐
Digital Clock Generation
The CD4522BM can organize a master oscillator into useful timing intervals for digital clocks and sequencers. Its internal synchronous architecture and edge-clocked counting method are useful when a clean divide-by-N stage is required between a master clock and lower-rate system timing. The decoded zero output provides a convenient rollover indication, and cascade feedback allows a larger divide ratio to be built across stages. Because CMOS propagation delay varies with supply voltage, the clock designer should evaluate the timing path at the minimum operating voltage and highest temperature. This makes the CD4522BM especially practical for fixed-rate industrial clock trees where a dedicated programmable counter is preferred over firmware.
推荐
Pulse and Event Counting
The CD4522BM is suitable for counting recurring pulses and generating a terminal event after a programmable number of cycles. Its counter accepts positive Clock transitions, while the negative Clock Inhibit transition provides an alternate incrementing event according to the verified manufacturer description. This allows the same counter concept to support repetitive event counting, batch processing, and periodic actuator commands. The decoded zero output can mark completion of each counted sequence, while the programmable divide count determines how many events must accumulate. Engineers should account for switch bounce, input conditioning, and minimum clock pulse width, none of which were quantified in the supplied snippets and all of which must be confirmed from the manufacturer documentation.
推荐
Cascaded Frequency Divider
The CD4522BM can participate in a multistage frequency-divider chain when a single counter cannot provide the required division ratio. Its cascade-feedback capability reduces external logic, while the decoded zero output identifies each stage's terminal count. This arrangement is useful for deriving low-frequency timing from a higher-frequency source in industrial controllers, test equipment, and sequential fixtures. The design must preserve signal-quality margins through each stage and account for cumulative propagation delay and supply dependence. The verified 3 V to 18 V operating range allows consistent operation across several common supply choices, but exact cascade timing must be calculated using the full CD4522B datasheet rather than the search snippets.
推荐
Instrumentation Timing Reference
The CD4522BM can divide an oscillator into repeatable timing intervals for test and measurement systems. Its hardware-defined divide ratio provides a predictable event cadence without loading a controller with periodic interrupt handling, and the decoded zero output can mark the end of each interval. The wide -55 °C to +125 °C rating supports instrumentation environments when the surrounding system is also appropriately qualified. Use of a CMOS counter can also reduce clock-tree complexity compared with chained general-purpose logic. The main design trade-off is that propagation-delay and maximum-frequency figures were not included in the verified snippets, so an instrumentation designer must confirm timing at every required supply voltage and temperature before using the output as a precision reference.
推荐
Automotive or Robust Control Timing
The CD4522BM's -55 °C to +125 °C operating range makes it a candidate for timing functions in demanding equipment, although that temperature rating does not itself establish AEC-Q100 qualification. In a robust control system, the counter can divide a repetitive supervisory clock and indicate rollover for maintenance counters, sampling windows, or delayed events. Its internal synchronous design and decoded terminal-count output reduce the number of external gates required. Compliance and qualification must be verified for the exact ordered suffix before use in automotive, medical, or safety-regulated production. Engineers should also confirm whether the application requires a specific qualification grade, traceability, or change-control documentation beyond the published electrical and temperature specifications.
推荐
推荐产品汇总
工程参考数据： CD4522BM ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CD4522BMT | CD4522BMTG4 | CD4522BMG4 | CD4522BM96 | CD4522B |
|---|---|---|---|---|---|---|
| Package | SOIC-16 (D) | SOIC-16 (D) | SOIC-16 (D) | SOIC-16 (D) | SOIC-16 (D) | SOIC-16 (D) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Counter Function | Programmable BCD divide-by-N counter | Programmable BCD divide-by-N counter | Programmable BCD divide-by-N counter | Programmable BCD divide-by-N counter | Programmable BCD divide-by-N counter | Programmable BCD divide-by-N counter |
关键差异点
- Explicitly verified complete replacement option （对比 CD4522BMT)
- Programmable terminal-count indication （对比 CD4522BMG4)
- Broad verified supply and temperature coverage （对比 CD4522BMTG4)
设计说明
Do not infer timing performance from the counter's internal synchronous description alone. Obtain the manufacturer datasheet and evaluate propagation delay, transition-time limits, and maximum operating frequency at the minimum planned supply voltage and worst-case temperature. The supplied search results confirm the 3 V to 18 V range but do not provide verified timing numbers, so those values remain a design-review dependency.
Place the supply bypass capacitor close to the device's VDD and ground connections, and route the clock and control traces away from noisy switching nodes. The CD4522BM is a 16-pin SOIC counter whose decoded zero output and control inputs participate in timing, so long traces can add delay or allow coupling into the count sequence. Use a solid ground plane and avoid sharing narrow return paths with high-current loads.
Use the decoded zero output and preset-enable input according to the manufacturer's single-stage or cascade configuration. A mistaken feedback connection can prevent the intended terminal count from being reached or create an unstable count sequence. Cascade feedback is specifically provided for multi-stage divide-by-N operation, so it should replace redundant external feedback logic rather than be added as an additional asynchronous path.
Keep every unused CMOS input at a defined logic level. Floating control, clock-inhibit, preset, or reset-related inputs can consume additional current and may produce uncertain behavior near switching thresholds. Confirm which inputs are asynchronous and which are edge-sensitive in the full CD4522B datasheet, and ensure that asynchronous controls are filtered when they originate from noisy or mechanical sources.
合规信息
The supplied verified snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The -55 °C to +125 °C temperature rating must not be interpreted as AEC-Q100 qualification.