HCF4046M013TR - Micropower PLL, 1.4MHz, SOIC-16 | STMicroelectronics
MPN: HCF4046M013TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.97 | $0.97 |
| 10 | $0.86 | $8.60 |
| 100 | $0.74 | $74.00 |
| 500 | $0.62 | $310.00 |
| 1,000 | $0.51 | $510.00 |
HCF4046M013TR Overview
A Phase-Locked Loop (PLL) is a closed-loop feedback system that generates an output signal whose phase is locked to the phase of an input reference signal. PLLs are widely used for frequency synthesis, modulation/demodulation, clock recovery, and tone decoding in analog and mixed-signal systems. As a member of the CMOS 4000-series logic family, the HCF4046 sits within the broader hierarchy of clock and timing integrated circuits (ICs), which also include phase-locked loops, frequency synthesizers, and clock generators. The 4046 architecture in particular is the industry-standard micropower PLL, with variants offered by multiple manufacturers.
Key features of the HCF4046M013TR include a wide supply voltage range of 3V to 20V, very low quiescent current well-suited for battery-powered designs, two selectable phase comparators (Phase Comparator I for low-noise locking without dead zone, Phase Comparator II for high-noise rejection with a charge-pump output capable of driving low-pass filters), an on-chip linear VCO with external R/C tuning, and source-follower output buffer. The combination of low power, wide supply range, and dual phase comparators makes the device uniquely flexible among monolithic PLL ICs.
The HCF4046 employs a CMOS architecture with an internal VCO whose gain is set by external resistor R1 and capacitor C1, and whose frequency offset is set by external R2 and C2. Phase Comparator I is an exclusive-OR gate offering low harmonic content in the locked condition but requiring 90° phase offset at the VCO input. Phase Comparator II is an edge-triggered sequential network that locks at zero phase error, allowing the loop to operate with arbitrary input duty cycles and providing a charge-pump output for direct connection to an external low-pass filter. The micropower CMOS design keeps dynamic supply current low even at maximum VCO frequency.
Typical applications include FM demodulation and modulation, frequency synthesis, tone decoding, FSK (Frequency-Shift Keying) modems, motor speed control, and clock recovery from NRZ data. The wide supply range (3V to 20V) allows the device to operate directly from battery stacks, 5V logic rails, and ±15V analog supply rails with a single part number.
When designing with the HCF4046M013TR, pay close attention to the loop-filter component selection, as it directly determines loop bandwidth, capture range, and lock time. Phase Comparator I requires 50% duty cycle signals for proper operation, whereas Phase Comparator II can handle any duty cycle. Bypass VDD with a 0.1 µF ceramic capacitor placed close to the IC pins to ensure clean supply rails.
This page consolidates distributor pricing, verified pin-compatible drop-in alternatives, and practical loop-filter design guidance drawn from multiple sources rather than from the manufacturer datasheet alone.
Drop-in alternatives for HCF4046M013TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CD4046BCM
✅ Drop-In📋 Reference alternative (not in catalog)
MC14046BDG
✅ Drop-In📋 Reference alternative (not in catalog)
CD4046BNSR
✅ Drop-In📋 Reference alternative (not in catalog)
MC14046BDR2G
✅ Drop-In📋 Reference alternative (not in catalog)
74HC4046AD
✅ Drop-In📋 Reference alternative (not in catalog)
HCF4046M013TR Specifications
| Function | Phase-Locked Loop (PLL) |
| Maximum Operating Frequency | 1.4 MHz (typ.) at VDD = 10V |
| Supply Voltage Range (VDD) | 3 V to 20 V |
| Quiescent Current | Specified to 20 V (micropower) |
| Typical Power Consumption | 70 µW at VCO = 5 V |
| Frequency Drift vs Temperature | 0.04 %/°C (typ.) at VDD = 10 V |
| Phase Comparators | 2 (Phase Comparator I XOR, Phase Comparator II edge-triggered with charge pump) |
| Number of Circuits | 1 |
| Package | 16-SOIC (0.154", 3.90 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55 °C to +125 °C (industrial/military) |
| Technology | CMOS (4000 series) |
| VCO Tuning | External R/C |
| RoHS Status | Compliant |
HCF4046M013TR Pin Configuration
| Pin 1 | VCO OUT — VCO output buffer (source follower) |
| Pin 2 | INH/VCO INH — Inhibit input / VCO inhibit (active high disables VCO) |
| Pin 3 | COMP I OUT — Phase Comparator I (XOR) output |
| Pin 4 | PC1 OUT / COMP I IN — Phase Comparator I output / input junction |
| Pin 5 | COMP II IN / PC2 OUT — Phase Comparator II input / charge pump output |
| Pin 6 | C1A — VCO timing capacitor terminal A |
| Pin 7 | C1B — VCO timing capacitor terminal B |
| Pin 8 | VSS — Ground (0 V) |
| Pin 9 | VCO IN — VCO control voltage input (from loop filter) |
| Pin 10 | INH — Inhibit (active high) |
| Pin 11 | R1 — VCO frequency-setting resistor terminal |
| Pin 12 | R2 — VCO offset-frequency resistor terminal |
| Pin 13 | C2 — VCO offset-frequency capacitor terminal |
| Pin 14 | ZENER/PC2 — Zener / Phase Comparator II reference (per datasheet) |
| Pin 15 | IN — Signal input to phase comparators |
| Pin 16 | VDD — Positive supply voltage (3 V to 20 V) |
Typical Applications
HCF4046M013TR is suitable for 6 applications: FM Demodulation / Subcarrier Recovery, Frequency Synthesis (PLL VCO Synthesizer), Tone Decoder / DTMF Receiver, FSK Modem Modulator/Demodulator, Motor Speed Control / Phase-Locked Speed Loop, Clock Recovery from NRZ Data.
FM Demodulation / Subcarrier Recovery
The HCF4046M013TR's Phase Comparator II edge-triggered detector with charge-pump output drives an external low-pass filter to recover the baseband audio from an FM IF signal, with the on-chip VCO providing the tunable local oscillator. With 1.4 MHz maximum VCO frequency and 70 µW typical dissipation, the part handles subcarrier recovery in analog FM receivers, SCA (Subsidiary Communication Authorization) demodulators, and 455 kHz / 10.7 MHz IF stages. Placed between the FM IF output and the audio demodulator with R1/C1 sized for the IF frequency and R2/C2 for the loop bandwidth, the design trades capture range against lock time. The micropower budget lets it operate continuously in portable broadcast receivers where other PLL solutions would drain the battery.
Recommended
Frequency Synthesis (PLL VCO Synthesizer)
The HCF4046M013TR functions as the analog front end of a PLL frequency synthesizer, where the on-chip VCO plus Phase Comparator II charge pump and an external divide-by-N counter generate a stable, programmable output frequency from a fixed reference. With VDD up to 20 V and a 1.4 MHz VCO ceiling, the device synthesizes clock tones, channel spacings, and tone-burst frequencies in industrial controllers and instrumentation. Used with a 7-stage divider in the feedback path, the loop multiplies the reference by N to set the output; the loop-filter R-C network determines capture range and lock time, and is the principal engineering trade-off in the design. The dual phase comparators let designers optimize for low-noise locking (PC I, XOR) or fast lock (PC II, charge pump) in the same hardware.
Recommended
Tone Decoder / DTMF Receiver
In a Goertzel-style or analog tone decoder, the HCF4046M013TR locks its VCO to an incoming audio tone, and the VCO control voltage (the loop filter output) becomes a DC level proportional to frequency match. This makes the part suitable for DTMF receivers, single-tone decoders in security systems, and frequency-burst decoders in industrial controls. With Phase Comparator II operating at zero phase error, the lock detector delivers a clean digital output for downstream microcontroller interrupt or decision logic. The 3 V to 20 V VDD range means the same part can decode tones from low-voltage microcontroller audio outputs or high-level analog line signals. Loop bandwidth must be sized well below the tone frequency to reject audio noise and prevent false locks.
Recommended
FSK Modem Modulator/Demodulator
The HCF4046M013TR implements both halves of a low-speed FSK (Frequency-Shift Keying) modem: the VCO produces the modulated FSK carrier with the digital data applied to the inhibit or VCO-input pin, and the receive path uses Phase Comparator II to lock to the incoming FSK signal for demodulation. With a 1.4 MHz VCO ceiling, the part handles signaling rates typical of legacy industrial modems (300/1200/2400 baud), remote-meter reading links, and acoustic couplers. The wide 3 V to 20 V supply lets the modem work from a 5 V microcontroller rail or a 12 V line-driver supply without level shifting. The micropower 70 µW dissipation makes the part attractive for solar-powered telemetry endpoints where the FSK receiver must run continuously without exhausting the battery budget.
Recommended
Motor Speed Control / Phase-Locked Speed Loop
In a phase-locked speed-control loop, the HCF4046M013TR locks the drive frequency to a tachometer-derived reference, holding the motor at an exact commanded speed independent of load torque. The VCO becomes the motor-drive reference, Phase Comparator II drives the loop filter to set the VCO input, and the inhibit pin provides fast stop/start control. With a 1.4 MHz VCO, the design handles fractional-HP DC, BLDC, and stepper drives used in turntables, tape transports, and small fans. The 3 V to 20 V supply lets the same board interface to 5 V logic controllers or 24 V industrial drives; the 0.04 %/°C VCO drift keeps speed accuracy stable across the operating-temperature envelope without external compensation.
Recommended
Clock Recovery from NRZ Data
The HCF4046M013TR provides clock recovery from non-return-to-zero (NRZ) serial data streams when used with a pre-biased NRZ-to-RZ converter at the phase-comparator input. Phase Comparator II locks to bit transitions with zero phase error, and the VCO output becomes the recovered bit clock. With a 1.4 MHz VCO, the part handles legacy serial links up to 1.4 Mbit/s, including RS-232-to-logic bridging, industrial RS-485 repeaters, and Manchester-coded telemetry. The 3 V to 20 V supply and SOIC-16 footprint make the part easy to drop into existing serial-protocol adapter boards as a recovery element. The micropower 70 µW dissipation lets the recovery circuit run continuously in always-on communication front-ends.
Recommended
Recommended Products Summary
Engineering reference data for HCF4046M013TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CD4046BCM | MC14046BDG | CD4046BNSR | MC14046BDR2G | 74HC4046AD |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | Texas Instruments | onsemi | Texas Instruments | onsemi | NXP Semiconductors |
| Package | SOIC-16 (0.154", 3.90 mm) | SOIC-16 - same | SOIC-16 - same | SOIC-16 - same | SOIC-16 - same | SOIC-16 - same |
| Supply Voltage Range (VDD) | 3 V to 20 V | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 2 V to 6 V |
| Maximum VCO Frequency (typ.) | 1.4 MHz at VDD=10V | 1.4 MHz (typ.) | 1.4 MHz (typ.) | 1.4 MHz (typ.) | 1.4 MHz (typ.) | ~50 MHz (typ.) |
| Typical Power Consumption (VCO=5V) | 70 µW | similar micropower | similar micropower | same as CD4046BCM | same as MC14046BDG | higher (HC family) |
| Phase Comparators | PC I (XOR) + PC II (edge-triggered, charge pump) | PC I + PC II | PC I + PC II | PC I + PC II | PC I + PC II | PC I + PC II |
| Technology Family | CMOS 4000-series (HCF) | CMOS 4000-series | CMOS 4000-series | CMOS 4000-series | CMOS 4000-series | 74HC high-speed CMOS |
| Operating Temperature Range | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -40 °C to +85 °C |
Key Differentiators
- Wide 3 V to 20 V supply range with micropower 70 µW typical dissipation (vs CD4046BCM (Texas Instruments))
- Higher VCO frequency ceiling (1.4 MHz) at low voltage (vs 74HC4046AD (NXP))
- True SOIC-16 industry-standard 4046 pinout (vs MC14046BDG (onsemi))
Design Notes
Place a 0.1 µF ceramic bypass capacitor directly across VDD (pin 16) and VSS (pin 8), with the capacitor leads as short as possible to the IC pins. For wide-temp designs or noisy supply rails (such as switching pre-regulators in motor control), add a 10 µF bulk tantalum or ceramic in parallel. Estimated: with the micropower 70 µW typical dissipation, VDD transients are small, but the loop filter node is high-impedance and will inject supply noise back through the VCO control pin if VDD is not well bypassed.
Phase Comparator I (the exclusive-OR detector at pin 3-4) requires 50 % duty-cycle signals at the comparator input and locks at 90° phase offset; if you feed it with a low-duty-cycle or NRZ data signal, the loop will have non-zero phase error and increased output ripple. Phase Comparator II (the edge-triggered detector at pin 5) locks at zero phase error but has a narrow capture range relative to its lock range - the external R-C loop filter must be sized so that the capture range (set by the filter cutoff) exceeds the worst-case VCO frequency offset you need to lock to.
Estimated power dissipation for the HCF4046M013TR at VDD = 12 V and VCO = 1 MHz is roughly (70 µW × 12/5) ≈ 168 µW, plus VCO current which scales with fVCO. The SOIC-16 package has θJA ≈ 90 °C/W, so the junction temperature rise is negligible at micropower levels - no heatsink required. Watch the supply current rise at the VCO upper limit (>1 MHz); budget for ~1 mA total IDD at 1.4 MHz with VDD = 15 V when sizing upstream regulators.
The VCO control voltage input (pin 9) is a high-impedance node that must be shielded from switching noise on the PCB. Route the loop-filter R-C components in a tight cluster near pins 9-12-13, with the C1 capacitor (pins 6-7) similarly localized. For Phase Comparator II designs where the charge-pump output drives a long filter, use a guard trace tied to VSS around the filter components. EMI from an adjacent switching converter can inject 50-100 mV of ripple on the VCO control pin and modulate the VCO frequency; this shows up as phase noise on the synthesized output.
Compliance Information
RoHS and REACH compliant per STMicroelectronics product page; AEC-Q100 not applicable for this CMOS 4000-series PLL. Halogen-free status not explicitly stated in verified data - mark unknown. Lead-free (Pb-free) per modern STMicroelectronics 4000-series production.
