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NXP Semiconductors HEF4046BP,652
- Part No.:
- HEF4046BP,652
- Manufacturer:
- NXP Semiconductors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
HEF4046BP,652.pdf
- Description:
- IC PHASE LOCK LOOP 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,849
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Product details
Overview
HEF4046BP,652 from NXP Semiconductors is a CMOS phase-locked loop (PLL) IC featuring dual phase comparators (XOR and edge-triggered memory type), a linear voltage-controlled oscillator (VCO), integrated Zener regulator, and source-follower output. It operates from 3 V to 15 V over −40 °C to +85 °C and supports frequency synthesis, tone decoding, and clock recovery in analog/digital mixed-signal systems.
For engineers reviewing the HEF4046BP,652 datasheet, HEF4046BP,652 pinout, HEF4046BP,652 application, or HEF4046BP,652 equivalent, this device requires attention to VCO external component selection (R1, C1, R2), comparator mode choice (PC1 vs PC2), low-pass filter design, and supply regulation via the ZENER pin - all critical for stable lock range, capture behavior, and noise immunity in real-world PLL implementations.
Technical Context
The HEF4046BP,652 integrates two distinct phase comparison architectures: Phase Comparator 1 is an XOR gate requiring 50% duty-cycle inputs and delivering analog average output voltage proportional to phase difference; Phase Comparator 2 is an edge-triggered flip-flop network responding only to positive edges, enabling harmonic-free locking and zero steady-state phase error across the full VCO range.
VCO operation relies on external R1/C1 for center frequency (f₀) and optional R2 for frequency offset; its high-impedance input allows flexible low-pass filter design, while SF_OUT (pin 10) provides buffered VCO_IN voltage to prevent filter loading. INH (pin 5) enables hardware-level VCO and source-follower shutdown for standby power reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 15 V - supports single-supply operation across 5 V, 10 V, and 15 V logic domains without level-shifting. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded and instrumentation applications. |
| VCO Max Frequency | 2.7 MHz at 15 V (R1 = 10 kΩ, C1 = 50 pF) - defines upper bound of lockable input signal range in PLL configurations. |
| Phase Comparator 1 Lock Range | ≤ full VCO frequency range - capture range depends on low-pass filter; lock range equals fmax − fmin. |
| Phase Comparator 2 Lock Range | Equals capture range - no dependency on low-pass filter; enables deterministic lock acquisition with zero static phase error. |
| Zener Regulator Voltage | 7.3 V at IZ = 50 µA - provides internal regulated supply option when VDD exceeds 7.5 V, improving VCO stability. |
| Input Leakage Current | ±1.0 µA max at 15 V - ensures minimal bias current impact on high-impedance external timing networks. |
Pinout & Package
DIP16 plastic dual in-line package (300 mil, SOT38-4); 16-pin through-hole mounting with standard 0.1″ lead pitch and 0.3″ body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PCP_OUT) | Phase comparator pulse output | Active-HIGH lock indicator for Phase Comparator 2; signals stable PLL lock condition. |
| 2 (PC1_OUT) | Phase Comparator 1 output | Analog average voltage proportional to phase difference; drives low-pass filter to control VCO_IN. |
| 3 (COMP_IN) | Comparator input | Reference input for both phase comparators; accepts direct- or AC-coupled signals per logic thresholds. |
| 4 (VCO_OUT) | VCO output | Square-wave output (50% duty cycle) usable as system clock or feedback signal to COMP_IN or divider. |
| 5 (INH) | Inhibit input | Active-LOW enable: pulls VCO and SF_OUT to standby state when HIGH, reducing quiescent current. |
| 6 (C1A) / 7 (C1B) | VCO capacitor connections | Differential terminals for external timing capacitor C1; determines VCO frequency range and linearity. |
| 8 (VSS) | Ground supply | Primary ground reference for all internal circuitry; must be low-impedance connection. |
| 9 (VCO_IN) | VCO control input | Analog voltage input controlling VCO frequency; high-impedance (>10 MΩ) enables passive filter use. |
| 10 (SF_OUT) | Source-follower output | Buffered replica of VCO_IN; used to drive external load without disturbing VCO_IN node or filter. |
| 11 (R1) / 12 (R2) | VCO resistor connections | R1 sets center frequency; R2 adds frequency offset - both require precision values for stable f₀ calibration. |
| 13 (PC2_OUT) | Phase Comparator 2 output | Three-state digital output (p/n drivers) generating UP/DOWN pulses for charge-pump-like filter charging. |
| 14 (SIG_IN) | Signal input | Primary input for reference signal; self-biased for AC coupling or direct-coupled within CMOS logic levels. |
| 15 (ZENER) | Zener diode input | Connects to internal 7.3 V Zener; used to regulate VDD when unregulated supply exceeds 7.5 V. |
| 16 (VDD) | Supply voltage | Positive supply rail; powers all internal blocks; may be regulated via pin 15 or supplied directly. |
Key Features
| Feature | Design Value |
|---|---|
| Dual phase comparator architecture | Enables application-specific selection: PC1 for noise-tolerant analog PLLs; PC2 for deterministic digital lock with zero static phase error. |
| Externally programmable VCO | Full frequency range set by user-selected R1, C1, and optional R2 - supports custom center frequencies from Hz to MHz. |
| Integrated Zener regulator | 7.3 V internal Zener (pin 15) allows stable VCO operation under variable or noisy unregulated supplies above 7.5 V. |
| Source-follower output (SF_OUT) | Provides high-impedance buffered copy of VCO_IN (pin 9), eliminating loading effects on critical low-pass filter nodes. |
| Hardware inhibit (INH) | Active-LOW pin (5) disables VCO and SF_OUT independently, enabling precise power-gating in battery-sensitive designs. |
| JEDEC JESD13-B compliance | Ensures interoperability with legacy 4000B-series CMOS logic families and compatibility with existing PCB layouts. |
Applications
| Tone Decoder | Frequency Synthesizer |
|---|---|
Use Scenario: Detecting specific audio-frequency tones (e.g., DTMF, modem handshaking) in telecommunication interfaces. IC Role / Device Role / Timing Role: HEF4046BP,652 acts as a narrowband tracking filter - SIG_IN receives filtered tone, VCO locks to it, and PCP_OUT indicates lock. Use Value: Eliminates need for multiple bandpass filters or DSP-based detection; achieves fast acquisition and high SNR rejection using analog PLL dynamics. |
Use Scenario: Generating precise, stable clock frequencies from a low-frequency crystal reference in microcontroller peripherals. IC Role / Device Role / Timing Role: HEF4046BP,652 serves as integer-N frequency multiplier - reference clock feeds SIG_IN, VCO_OUT delivers multiplied output. Use Value: Enables clock scaling without external crystal oscillators; supports multiple output rates via simple R1/C1 changes and divider feedback. |
| Data Clock Recovery | Motor Speed Control |
Use Scenario: Extracting synchronous clock from NRZ-encoded serial data streams in legacy industrial protocols. IC Role / Device Role / Timing Role: HEF4046BP,652 functions as a jitter-tolerant clock regenerator - data stream drives SIG_IN, VCO_OUT recovers bit-rate clock. Use Value: Compensates for transmission-induced jitter and wander; maintains lock under bursty or low-duty-cycle data patterns using PC1's noise resilience. |
Use Scenario: Closed-loop tachometer-based speed regulation for DC motors in HVAC blowers or conveyor systems. IC Role / Device Role / Timing Role: HEF4046BP,652 compares back-EMF zero-crossing frequency (SIG_IN) against target speed reference (via R1/C1 setpoint), adjusting PWM duty cycle. Use Value: Provides analog proportional control without MCU intervention; leverages VCO linearity and comparator hysteresis for stable RPM regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase-locked loop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4046BE | TI variant with identical pinout and core functionality; VCO linearity and temperature drift differ slightly (±0.3% vs ±0.25% at 15 V). | Same PLL use cases but lower guaranteed fmax (1.2 MHz @ 15 V) limits high-speed clock recovery. | Select CD4046BE only if sourcing constraints require TI-authorized channels; verify VCO component values for target f₀. |
| 74HC4046 | High-speed CMOS version; operates up to 18 MHz but lacks Zener regulator and source-follower output. | Not suitable for unregulated supply environments or high-impedance filter designs requiring SF_OUT buffering. | Choose 74HC4046 only for high-frequency (>5 MHz), regulated-supply applications where Zener and SF_OUT are unnecessary. |
Compared with CD4046BE and 74HC4046, the HEF4046BP,652 uniquely combines Zener-based supply regulation, source-follower buffering, and industrial temperature grading - making it the only option among the three for robust, low-noise PLL designs in variable-supply industrial settings.
Availability
HEF4046BP,652 is available at Aetrix Electronics and suitable for tone decoder circuits, frequency synthesizer modules, and motor speed control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for HEF4046BP,652 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in analog and mixed-signal IC design.
The HEF4046BP,652 belongs to NXP's legacy HE4000B CMOS logic family, engineered for high-noise-immunity, low-power, and wide-supply-voltage PLL applications in industrial instrumentation and telecom infrastructure.
FAQ
What is the function of the ZENER pin (pin 15) on the HEF4046BP,652?
The ZENER pin (15) connects to an internal 7.3 V Zener diode used to regulate the VDD supply when the external voltage exceeds ~7.5 V. This improves VCO frequency stability under noisy or unregulated input conditions. For regulated 5 V or 15 V supplies, pin 15 is left open. The HEF4046BP,652 uses this feature to maintain consistent VCO gain and lock range without external regulators.
How do Phase Comparator 1 and Phase Comparator 2 differ in behavior for the HEF4046BP,652?
Phase Comparator 1 (PC1) is an XOR gate requiring 50% duty-cycle inputs and producing an analog average output voltage; it tolerates high input noise but may lock to harmonics. Phase Comparator 2 (PC2) responds only to positive edges, delivers three-state UP/DOWN pulses, and achieves zero static phase error with no harmonic locking. The HEF4046BP,652 allows designers to select based on noise environment and precision requirements.
Can the HEF4046BP,652 operate from a 3.3 V supply?
No - the HEF4046BP,652 has a minimum recommended supply voltage of 3 V, but its input thresholds (VIH = 3.5 V at 5 V VDD) and VCO performance are not characterized below 5 V. At 3.3 V, VIH exceeds VDD, preventing reliable logic recognition. The HEF4046BP,652 is specified for 5 V, 10 V, and 15 V operation, with full parametric ratings only at those voltages.
What is the purpose of the SF_OUT pin (pin 10) on the HEF4046BP,652?
SF_OUT (pin 10) is a source-follower output that buffers the VCO_IN control voltage, providing a low-impedance replica without loading the high-impedance VCO_IN node. This preserves low-pass filter integrity and prevents distortion of the control voltage waveform. When used, a load resistor (e.g., 10 kΩ to VSS) must be connected; unused, SF_OUT is left open. The HEF4046BP,652 relies on this feature for stable VCO tuning in precision applications.
How does the INH pin (pin 5) affect power consumption in the HEF4046BP,652?
The INH pin (5) is an active-LOW inhibit control: when driven HIGH, it disables both the VCO and source-follower, reducing supply current from ~750 µA (at 15 V) to <1 µA. This enables ultra-low-power standby modes in battery-operated systems. The HEF4046BP,652 uses this pin for hardware-level power gating without requiring external switches or complex sequencing - simplifying energy-aware design.
HEF4046BP,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- HE4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Phase Lock Loop (PLL)
- PLL:
- Yes
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:4
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 2.7MHz
- Divider/Multiplier:
- No/No
- Voltage - Supply:
- 3V ~ 15V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-DIP
HEF4046BP,652 FAQ
1.How can I place an order for HEF4046BP,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for HEF4046BP,652 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HEF4046BP,652 reliable?
The price and inventory of HEF4046BP,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HEF4046BP,652 is usually 5 days.
3.What payment methods are accepted for HEF4046BP,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HEF4046BP,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HEF4046BP,652?
HEF4046BP,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HEF4046BP,652 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HEF4046BP,652?
For technical support, including HEF4046BP,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HEF4046BP,652 requirements.
6.How does Aetrix verify that HEF4046BP,652 is sourced from the original manufacturer or authorized distributors?
All HEF4046BP,652 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HEF4046BP,652 meets industry standards.
7.What is the process for return or replacement of HEF4046BP,652?
All HEF4046BP,652 units undergo pre-shipment inspection (PSI). If there is an issue with HEF4046BP,652, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HEF4046BP,652 part is unused and in its original packaging.
Return procedure for HEF4046BP,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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