CD4046AF/3 - 1.5MHz CMOS Phase-Locked Loop | Harris
MPN： CD4046AF/3 ✓ 啟用中CD4046AF/3 概覽
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.
直接替換替代品，適用於 CD4046AF/3 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
CD4046AF
✅ 直接替換📋 參考替代品（不在目錄中）
CD4046AF/3
✅ 直接替換聯絡詢價
查看資料表 →CD4046BN
✅ 直接替換📋 參考替代品（不在目錄中）
MC14046B
✅ 直接替換📋 參考替代品（不在目錄中）
HEC4046B
✅ 直接替換📋 參考替代品（不在目錄中）
CD4046AF/3 規格
| Product Type | CMOS phase-locked-loop IC |
| Maximum Operating Frequency | 1.5 MHz |
| Phase Comparator Configuration | Dual phase comparators |
| Logic Technology | CMOS |
| Low-Power Operation | Low-power CMOS implementation |
| Package Type | 16-CDIP ceramic dual-inline package |
| Package Pin Count | 16 pins |
| Lead Spacing | 0.300 inch (7.62 mm) |
| 安裝類型 | Through-hole |
| Number of Channels | 1 PLL channel |
| Maximum VCO Frequency | 1.5 MHz |
CD4046AF/3 16 pins 腳位配置指南
CD4046AF/3（16 pins 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： CD4046AF/3.
請參閱 資料表 以查看完整腳位配置。
典型應用
CD4046AF/3 適用於 6 應用s: Frequency Synthesis, Clock Synchronization, FM Demodulation, Tone Decoding and Frequency Detection, Phase-Angle Measurement, Motor Speed Control.
Frequency Synthesis
The CD4046AF/3 fits low- and medium-frequency synthesis because it provides a phase-locked-loop function with dual comparators and operation up to 1.5 MHz. An external voltage-controlled oscillator, programmable divider, and loop filter can be arranged around the IC so the output tracks a stable reference. The feedback path corrects frequency and phase error, while the loop filter establishes capture range, damping, and jitter. Designers should select comparator characteristics and external component ranges from the manufacturer application guidance, and validate acquisition over the full intended supply and temperature range.
Clock Synchronization
The CD4046AF/3 can synchronize a generated clock to an external reference by comparing the divided oscillator output with the reference signal. Its phase-locked-loop architecture is appropriate for instrumentation, communication, and industrial timing systems operating below the 1.5 MHz device limit. A dual phase-comparator arrangement provides flexibility in the detection method and loop polarity. Keep the feedback trace short, place the loop-filter components close to the device, and verify pull-in range, phase error, and steady-state jitter before using the synchronized clock as a system timebase.
FM Demodulation
For FM demodulation, the CD4046AF/3 can detect phase variation in a recovered signal and use that information to control an external voltage-controlled oscillator. The feedback loop then follows the input frequency changes and reconstructs the corresponding demodulated output. Because the device operates up to 1.5 MHz, it is suited to low- and medium-band communication or instrumentation signals rather than very high-frequency receivers. Component tolerances in the loop filter and VCO directly affect distortion and tracking bandwidth, so engineers should verify response over the intended modulation frequency and signal level.
Tone Decoding and Frequency Detection
The CD4046AF/3 is applicable to tone-decoding and frequency-detection systems that compare an incoming signal with a controllable oscillator. When the loop locks to a target tone, the phase-comparator output indicates the relationship between the reference and feedback signals, allowing the circuit to assert a detection condition. Its dual phase comparators support alternative detection arrangements, and the 1.5 MHz limit accommodates many audio-frequency and low-speed control tasks. Guard against false lock by defining the acceptance bandwidth, filtering noise from the detector input, and testing signal amplitude and frequency tolerances.
Phase-Angle Measurement
A CD4046AF/3-based phase-angle measurement circuit can compare two signals through its phase-comparator function and convert the phase relationship into a control or measurement result. This is useful in power-factor instrumentation, motor-control research, signal analyzers, and educational phase measurement systems. The loop bandwidth must be slow enough to preserve the phase relationship being measured yet fast enough to track expected changes. Component leakage, comparator offsets, and VCO gain variation should be included in the error budget, while the 1.5 MHz operating ceiling defines the usable bandwidth boundary.
Motor Speed Control
The CD4046AF/3 can form the timing core of a low-speed motor-speed control system by locking an oscillator to a command or feedback frequency. The phase comparator supplies a correction signal, and the external VCO and loop filter determine how quickly and accurately the controlled speed follows the reference. This arrangement is practical for stepper-motor pulse systems, small DC motor controls, and laboratory drives. Mechanical inertia and load variation affect the required loop bandwidth, so designers should verify starting behavior, overshoot, and stable operation across supply and temperature extremes.
工程參考資料，適用於 CD4046AF/3 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CD4046AF | CD4046AF/3 | CD4046BN | MC14046B | HEC4046B |
|---|---|---|---|---|---|---|
| Package | 16-CDIP (0.300 inch, 7.62 mm) | 16-CDIP (0.300 inch, 7.62 mm) | 16-CDIP (0.300 inch, 7.62 mm) | 16-CDIP (0.300 inch, 7.62 mm) | 16-CDIP (0.300 inch, 7.62 mm) | 16-CDIP (0.300 inch, 7.62 mm) |
| Brand | Harris Corporation | Harris Corporation | Harris Corporation | Texas Instruments | onsemi | Nexperia |
| Product Type | CMOS phase-locked-loop IC | CMOS phase-locked-loop IC | CMOS phase-locked-loop IC | CMOS phase-locked-loop IC | CMOS phase-locked-loop IC | CMOS phase-locked-loop IC |
| Logic Technology | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS |
| Pin Count | 16 pins | 16 pins | 16 pins | 16 pins | 16 pins | 16 pins |
| Lead Spacing | 0.300 inch (7.62 mm) | 0.300 inch (7.62 mm) | 0.300 inch (7.62 mm) | 0.300 inch (7.62 mm) | 0.300 inch (7.62 mm) | 0.300 inch (7.62 mm) |
主要差異化特點
- Confirmed 1.5 MHz operating class in a through-hole package (對比CD4046BN)
- Dual phase comparators support flexible loop implementation (對比MC14046B)
- Ceramic CDIP construction supports through-hole assembly (對比HEC4046B)
設計說明
Keep the phase-comparator output, loop filter, VCO control node, and feedback divider physically close to the CD4046AF/3. Short traces reduce parasitic capacitance and susceptibility to injected noise, which can appear as phase jitter or unstable lock behavior. Route the oscillator and feedback paths away from switching nodes and high-current return paths, and use a solid ground-plane connection for the CMOS device.
Do not treat the 1.5 MHz listing limit as proof that every loop is stable at 1.5 MHz. Capture range, VCO gain, divider ratio, loop-filter values, and supply voltage determine usable operating points. Before release, test lock acquisition from the worst-case initial phase error and verify steady-state jitter after settling. Compare these results with the limits in the manufacturer datasheet.
Decouple the supply pins with a local ceramic capacitor and provide adequate energy storage for transient loads. Follow the manufacturer datasheet for the recommended capacitor type, effective capacitance, and ESR range because incorrect compensation can affect loop stability or startup. Check the supply current over temperature and confirm that upstream voltage ripple does not move the device outside its rated operating range.
Confirm the numbered 16-CDIP pinout, comparator output polarity, and pin states at power-up before assembling the PCB. A family-level illustration may differ from the exact suffix configuration, and an incorrect comparator connection can create positive feedback rather than stable phase lock. Review the CD4046AF/3 manufacturer pin-description table and validate every external connection against that document.
合規資訊
The product listings do not state exact-MPN compliance declarations for RoHS, REACH, lead-free status, halogen-free status, or conflict-minerals compliance. AEC-Q100 is treated as not applicable because the target is a general-purpose clock-and-timing IC, not an identified automotive-qualified variant.
