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Texas Instruments CD74HCT4046AMT — Clock & Timing ICs

CD74HCT4046AMT PLL with VCO, 38 MHz, 16-SOIC

MPNCD74HCT4046AMT
End of Life

Texas Instruments 74HCT series CD74HCT4046AMT, Phase Lock Loop (PLL) with VCO, CMOS input/output, 38 MHz max frequency, 4.5V–5.5V supply, -55°C to 125°C, 16-SOIC surface mount.

$1.3Ref. price · indicative, final on quote
Texas Instruments CD74HCT4046AMT datasheet (PDF)
Packaging16-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Series74HCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CD74HCT4046AMT specifications
ParameterValue
TypePhase Lock Loop (PLL)
Series74HCT
MountingSurface Mount
Voltage4.5V ~ 5.5V
Frequency38MHz
Operating temperature-55°C ~ 125°C
PLLYes
InputCMOS
OutputCMOS
PackageTape & Reel (TR); Cut Tape (CT)
Case16-SOIC (0.154\", 3.90mm Width)
Divider (Multiplier)No/No
Number of circuits1
Ratio - Input:Output1:4
Differential - Input:OutputNo/No

Product details

38 MHz PLL with integrated VCO — what it buys you

The Texas Instruments CD74HCT4046AMT is a single-circuit phase-locked loop (PLL) with an on-chip voltage-controlled oscillator (VCO), built in 74HCT CMOS logic. The VCO can be swept up to 38 MHz, which sets the practical upper bound for the PLL's capture and lock range. The 1:4 input-to-output ratio means one reference input can drive four phase-detector outputs — useful for distributing a clean clock or synchronizing multiple local oscillators from a single source.

Military temperature range — not just industrial

Active lifecycle — no end-of-life clock ticking

Marked as Active with ROHS3 compliance, so there is no LTB window to chase, no last-buy deadline. The 74HCT family has broad distribution, so supply is generally stable — no allocation-era panic needed here.

This is a current-production, widely stocked part in the 74HCT logic family.

Frequently asked questions

What is the maximum frequency of CD74HCT4046AMT?

The VCO can be driven up to 38 MHz maximum. This sets the upper limit for the PLL's lock range; the actual capture range depends on the loop filter components you choose.

Is CD74HCT4046AMT a replacement for CD4046?

Functionally similar — both are PLLs with VCO — but the CD74HCT4046AMT uses HCT logic (CMOS with TTL-compatible input thresholds) and operates from 4.5 V to 5.5 V, while the original CD4046 is a full CMOS part with a wider supply range. Verify input thresholds and supply compatibility before substituting.