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Texas Instruments SN74LV4046AN — Clock & Timing ICs

SN74LV4046AN PLL IC, 38 MHz, 3V–5.5V, Through Hole

MPNSN74LV4046AN
End of Life

Texas Instruments SN74LV4046AN, 74LV series, Phase Lock Loop (PLL) with VCO, CMOS/TTL inputs and outputs, 38 MHz max frequency, 3V to 5.5V supply, 16-DIP through-hole package, -40°C to 125°C operating temperature.

$1.56Ref. price · indicative, final on quote
Texas Instruments SN74LV4046AN datasheet (PDF)
Packaging16-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74LV
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74LV4046AN specifications
ParameterValue
TypePhase Lock Loop (PLL)
Series74LV
MountingThrough Hole
Supply voltage3V ~ 5.5V
Frequency - max38MHz
Operating temperature-40°C ~ 125°C
PLLYes
InputCMOS, TTL
OutputCMOS, TTL
PackageTube
Case16-DIP (0.300\", 7.62mm)
Divider (Multiplier)No/No
Number of circuits1
Ratio - Input:Output1:3
Differential - Input:OutputNo/No

Product details

Phase-locked loop with integrated VCO — what it does in the circuit

The Texas Instruments SN74LV4046AN is a phase-locked loop (PLL) circuit that integrates a voltage-controlled oscillator (VCO), phase comparators, and a common amplifier on a single chip. It accepts CMOS or TTL input levels and delivers CMOS or TTL outputs, making it a flexible building block for frequency synthesis, clock recovery, tone decoding, and motor-speed control loops. The 74LV series operates from a 3V to 5.5V supply, so it fits both 3.3V and 5V logic domains without a level translator.

The VCO can run up to 38 MHz, which sets the upper bound for the output frequency and the lock range. For a clean lock, keep the centre frequency at least 20% below this ceiling to account for component tolerances and temperature drift.

Supply range 3V to 5.5V — mixed-voltage BOM fit

Rated from 3V to 5.5V, this PLL works in both 3.3V and 5V systems without a separate regulator for the PLL supply. That simplifies the power rail in battery-powered portable equipment (3.3V) and legacy 5V industrial controllers alike. The 1:3 input-to-output ratio means one reference input can drive three internal PLL blocks, useful for generating multiple derived clocks from a single crystal.

The through-hole 16-PDIP package (0.300" body) is easier to hand-solder and more resistant to vibration than a surface-mount package, which matters in high-shock environments and during prototyping.

Pricing and availability are confirmed at quote time through independent distribution.

Frequently asked questions

Can SN74LV4046AN operate with a 3.3V supply?

Yes. The supply range is 3V to 5.5V, so 3.3V is well within the operating window. At 3.3V the VCO frequency range will be lower than at 5V, but the 38 MHz maximum still applies at the upper end of the supply. For a 3.3V-only design, this part eliminates the need for a separate 5V rail just for the PLL.

What is the maximum frequency of SN74LV4046AN?

The VCO can run up to 38 MHz. This is the maximum frequency at which the PLL can lock and track an input signal. Practical loop bandwidth will be lower depending on the loop filter components and supply voltage.

Is SN74LV4046AN RoHS compliant?

Yes, it is ROHS3 compliant per the TI lifecycle data.

What is the difference between SN74LV4046AN and CD74HCT7046AE?

Both are through-hole PLLs with a 38 MHz maximum frequency, but the CD74HCT7046AE runs on a 4.5V to 5.5V supply (HCT logic) and has a 1:2 input-to-output ratio versus the LV variant's 1:3. The HCT version also has a wider temperature range (-55°C to 125°C) and is not a direct pin-for-pin replacement — the output count differs. If you need three PLL outputs from one reference, the SN74LV4046AN is the correct choice.