CD4063BM - 4-Bit CMOS Magnitude Comparator | TI
料号： CD4063BM ✓ 量产中CD4063BM 概述
A magnitude comparator is a digital logic circuit that determines whether one numeric word is less than, equal to, or greater than another. The CD4063BM belongs to the CMOS logic family and occupies the hierarchy of comparator, digital comparator, logic IC, and integrated circuit. Its binary and BCD support makes it useful in computer, control, arithmetic, and digital decision-making systems where a compact hardware comparator can simplify control logic.
The principal features include eight comparison inputs designated A3 through A0 and B3 through B0, plus active-high A<B, A=B, and A>B outputs. Cascading inputs allow multiple comparator sections to be combined when comparing numbers wider than four bits. The manufacturer identifies the CD4063B family as pin-compatible with the standard 7485 TTL type, while the CD4063BM is the 16-SOIC ordering variant.
Internally, the device compares the two 4-bit words by evaluating their binary significance and generating mutually exclusive magnitude decisions. This hardware approach provides a direct result without a clock or iterative software loop. For cascading applications, the additional inputs allow a lower-order comparison section to inform a higher-order section, supporting larger multibit comparisons from identical functional blocks.
Typical uses include digital control systems, industrial counter and sequencing logic, computer address and data-path comparisons, BCD processing, and embedded decision logic. The three explicit result outputs also allow a controller to branch immediately according to whether the two operands are less than, equal to, or greater than one another.
Designers should account for propagation delay, supply-voltage requirements, unused inputs, and output loading when integrating the comparator into longer digital chains. Cascaded sections should follow the manufacturer's input connection and timing guidance. The supplied verified data does not include the complete electrical timing table, so voltage, current, delay, and temperature limits must be confirmed in the manufacturer datasheet before release.
This page combines the verified manufacturer description, distributor inventory and price observations, same-package replacement options, and practical design guidance. It separates confirmed CD4063BM facts from parameters that still require datasheet verification, providing engineers with a concise selection and implementation reference.
直接替换替代料： CD4063BM ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CD4063BM （相同外形与封装尺寸） ——差异在于 Package.
CD4063BE
✅ 直接替换联系询价
查看数据手册 →CD4063BF
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →HCF4063BM1
✅ 直接替换📋 参考替代料（不在目录中）
HCF4063BM
✅ 直接替换📋 参考替代料（不在目录中）
CD4063BM 最大额定值与电气特性
| Comparator Type | 4-bit magnitude comparator |
| Logic Family | CMOS |
| Supported Number Formats | Binary or BCD |
| Comparison Input Count | 8 inputs |
| Comparison Input Designations | A3-A0 and B3-B0 |
| Output Count | 3 outputs |
| Output Designations | A<B, A=B, and A>B |
| Output Polarity | Active-high |
| Cascading Input Count | 3 cascading inputs |
| 封装 | 16-SOIC |
| Package Width | 0.154 in (3.90 mm) |
| 安装类型 | Surface mount |
| TTL Compatibility | Pin-compatible with standard 7485 TTL type |
| RoHS 状态 | unknown |
| REACH Status | unknown |
CD4063BM 0.154 in (3.90 mm) 引脚配置指南
CD4063BM（0.154 in (3.90 mm) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： CD4063BM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CD4063BM 适用于 6 应用s: Digital Address and Data-Path Comparison, BCD Counter and Sequencing Control, Cascaded Wide-Word Comparisons, Industrial Control and Threshold Decisions, Communication and Control Packet Validation, Embedded Decision and Safety-Interlock Logic.
Digital Address and Data-Path Comparison
The CD4063BM is appropriate for hardware comparison of two 4-bit addresses or data values because it produces separate active-high outputs for less-than, equal-to, and greater-than conditions. It can be placed between a processor bus and control logic so that a direction or selection decision is available without executing a software comparison. The 16-pin SOIC package supports compact digital layouts, while the eight A and B inputs map naturally to nibble-wide buses. During design, verify propagation delay against the bus timing and confirm that the selected alternative has the same numbered pins before substituting a HCF or CD4063BE device.
推荐
BCD Counter and Sequencing Control
The CD4063BM can compare BCD nibbles in decimal counters, display-processing logic, and sequencing controllers. Its ability to handle either binary or BCD makes it useful when two 4-bit decimal values must be tested before a counter increments, reloads, or transitions to another state. The A<B, A=B, and A>B outputs allow each branch of a state machine to use a dedicated decision path. In a practical implementation, account for cumulative logic delay when several gates follow the comparator and use the manufacturer timing data to establish a safe clock or settling margin.
推荐
Cascaded Wide-Word Comparisons
The CD4063BM is useful when a system must compare more than four bits by connecting multiple comparator sections through the three cascading inputs. Each section can evaluate a 4-bit slice and pass a lower-order relationship into the next section, allowing an 8-bit, 12-bit, or wider comparison to be assembled from repeatable blocks. This approach avoids implementing a complete word comparator in programmable logic. The key design constraint is timing: total propagation delay accumulates through the cascaded path, so the system clock and settling time must be verified against the worst-case conditions stated in the CD4063B datasheet.
推荐
Industrial Control and Threshold Decisions
The CD4063BM can implement threshold decisions in industrial control boards by comparing a 4-bit command, setpoint, or status word against a reference value. Its three separate outputs make it possible to trigger different actions for below-target, on-target, and above-target conditions. This avoids multiple equality gates and provides direct logic usable by relays, display drivers, or downstream programmable interfaces. For an industrial environment, engineers should verify the device's supported supply range, temperature grade, noise immunity, and timing from the manufacturer datasheet rather than inferring them from the generic CMOS description.
推荐
Communication and Control Packet Validation
The CD4063BM can support simple length, ordering, or checksum-stage validation in communication equipment by comparing two 4-bit control fields. The less-than, equal-to, and greater-than outputs can select protocol actions without requiring a general-purpose controller to execute a sequence for every comparison. It is particularly suitable for low-speed legacy CMOS control logic and status multiplexing. The design must ensure that input levels remain within the device's supported supply and threshold ranges, that outputs do not exceed their load capability, and that any isolation or level translation is correctly inserted between modern bus devices and the CD4063BM.
推荐
Embedded Decision and Safety-Interlock Logic
The CD4063BM can act as a hardware interlock for systems in which two 4-bit status fields must satisfy a defined relationship before another operation is permitted. For example, an A=B output can qualify a machine enable, while A<B and A>B identify invalid operating ranges for diagnostic routing. Hardwired comparison reduces dependence on firmware for a specific decision, although it does not replace a complete functional-safety assessment. Designers should evaluate single-fault behavior, reset and power-up states, unused-input handling, timing margins, and the exact replacement part's electrical characteristics before using the comparator in a safety-related path.
推荐
推荐产品汇总
工程参考数据： CD4063BM ——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 | CD4063BE | CD4063BF | HCF4063BM1 | HCF4063BM |
|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | STMicroelectronics |
| Comparison Width | 4 bits | 4 bits | 4 bits | 4 bits | 4 bits |
| Magnitude Outputs | 3 active-high outputs: A<B, A=B, A>B | 3 magnitude outputs | 3 magnitude outputs | 3 magnitude outputs | 3 magnitude outputs |
| Logic Technology | CMOS | CMOS | CMOS | CMOS | CMOS |
关键差异点
- Direct three-way comparison without software （对比 CD4063BE)
- Native cascading support （对比 HCF4063BM1)
- Documented TTL-family footprint relationship （对比 HCF4063BM)
设计说明
Do not treat every same-package 4-bit comparator as an automatic substitute. The verified excerpts establish the CD4063BM function and 16-SOIC package, but they do not provide the complete pin-number mapping, propagation delay, supply range, or temperature grade for every alternative. Before replacing CD4063BM with CD4063BE, CD4063BF, HCF4063BM1, or HCF4063BM, compare the manufacturer connection diagrams and electrical tables and confirm that every unused or cascading terminal is connected identically.
Include the CD4063BM propagation delay in the system timing budget rather than treating the result as instantaneous. Cascaded comparisons can accumulate delay across multiple sections, so a 4-bit slice chain may require several comparison intervals before its outputs are stable. Confirm the maximum delay at the intended supply voltage and temperature, and avoid using the comparison result to trigger a narrow pulse unless the downstream timing has been verified against those worst-case values.
Place the comparator near the A and B input drivers to minimize unequal propagation caused by trace-length mismatch. Keep the eight input routes away from high-current switching nodes and maintain a continuous return path beneath the device. Since a magnitude comparator examines several bits simultaneously, inconsistent rise and fall times can create unequal arrival times at the inputs even when the PCB traces are geometrically matched. Validate the interface with an oscilloscope when switching noise or long interconnects are present.
Operate the CD4063BM only within the supply-voltage range, input thresholds, output-current limits, and absolute maximum ratings stated in the current manufacturer datasheet. Those values were not present in the supplied excerpts and must not be inferred from the CD4000-series name. Decouple the supply locally, provide a stable ground reference, and account for CMOS input behavior and unused-pin requirements before releasing the PCB layout.
合规信息
The supplied verified excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is treated as not applicable because the CD4063BM is a general-purpose logic IC and no automotive qualification claim was provided.
