Description
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The HEF4046BDB is a military- or industrial-grade CMOS Phase-Locked Loop (PLL) integrated circuit (IC) originally manufactured by Philips Semiconductors (whose logic division transitioned to NXP and later Nexperia) it’s an early ceramic dual-in-line (CDIP) 4000-series logic chip and is widely used for frequency modulation, demodulation, signal synchronization, and frequency synthesis.
Key Technical Specifications
- Core Functions: Features an integrated linear voltage-controlled oscillator (VCO) paired with two distinct phase comparators that utilize a common signal input amplifier.
- Operating Voltage Range: Extremely flexible, supporting a wide supply window from 3.0 V to 15.0 V.
- Integrated Zener Regulator: Includes a built-in 7 V Zener diode to allow for simple supply voltage regulation if your circuit architecture demands it.
- Power & Performance: Built using standard LOCMOS/CMOS architecture, ensuring low power dissipation alongside high noise immunity.
- Package Style: The “BD” suffix historically indicates a 16-pin dual in-line (DIL) ceramic package (Cerdip / SOT74).
Pinout Architecture (16-Pin Layout)
The chip operates with the following fundamental connections:
- Pin 16 (\(V_{DD}\)) & Pin 8 (\(V_{SS}\) / Ground): Main power rails.
- Pin 9 (VCO IN): Receives the control voltage to shift the output frequency.
- Pin 4 (VCO OUT): The raw frequency output generated by the internal oscillator.
- Pin 14 (SIG IN): Reference input signal that the PLL attempts to lock onto.
- Pin 3 (COMP IN): The input for the comparison signal (often tied directly back to Pin 4 or divided down through a counter).
- Pins 6 & 7 (C₁): Terminals for the external timing capacitor.
Part Number Breakdown
- HEF: Philips/NXP/Nexperia standard CMOS 4000-series family prefix.
- B: Buffered outputs (provides higher noise immunity and faster, more reliable transition shapes).
Key Technical Specifications
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The electrical parameters adhere closely to the standard HEF4046B family specification:
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The trailing suffixes break down the specific packaging type:
- “B”: Indicates it belongs to the buffered 4000-series CMOS logic family.
- “D”: Denotes a 16-pin dual-in-line (DIL).
- “B” : Ceramic package (Cerdip / SOT73 designator) operating temperature range: -40 °C to +125 °C
Historical Context
During the 1970s and early 1980s, Philips produced their CMOS logic line under the HEF prefix (High-threshold / High-voltage CMOS), competing with RCA’s CD4000 series. The ceramic “BDB” variants were military-grade or higher spec. components designed for rugged environments, featuring hermetic ceramic packages with gold-plated or tin leads rather than standard commercial plastic molding.
Now obsolete for datasheet search…CD4046BDB
Or go directly to…
https://www.alldatasheet.com/datasheet-pdf/view/17715/PHILIPS/HEF4046BD.html
PLEASE NOTE!
These parts came to us as part of a lot of surplus stock from a large ‘milspec’ type Co. and have been kept in storage for some time, we have therefore classified them as ‘new other’, they are however pristine, and, as with all our products they come with a full guarantee.
If you have similar items to this, or indeed any electronic components that are surplus to requirements please contact us with details.
