Register once, drag and drop ECAD models into your CAD tool and speed up your design.

Click here for more information


PLL with band gap controlled VCO

The 74HCT9046A. This device features reduced input threshold levels to allow interfacing to TTL logic levels. Inputs also include clamp diodes, this enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors

Features and benefits

  • Operation power supply voltage range from 4.5 V to 5.5 V
  • Low power consumption
  • Complies with JEDEC standard no. 7A
  • Inhibit control for ON/OFF keying and for low standby power consumption
  • center frequency up to 17 MHz (typical) at VCC = 5.5 V
  • Choice of two phase comparators:
    • PC2: Edge-triggered JK flip-flop
  • No dead zone of PC2
  • Charge pump output on PC2, whose current is set by an external resistor Rbias
  • center frequency tolerance ±10 %
  • Excellent Voltage Controlled Oscillator (VCO) linearity
  • Low frequency drift with supply voltage and temperature variations
  • On-chip band gap reference
  • Glitch free operation of VCO, even at very low frequencies
  • Zero voltage offset due to operational amplifier buffering
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V


  • FM modulation and demodulation where a small center frequency tolerance is essential
  • Frequency synthesis and multiplication where a low jitter is required (e.g. video picture-in-picture)
  • Frequency discrimination
  • Tone decoding
  • Data synchronization and conditioning
  • Voltage-to-frequency conversion
  • Motor-speed control


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)fmax (MHz)Power dissipation considerationsRth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HCT9046ADEnd of life4.5 - 5.5TTL± 42319low671.025.1SO16


All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9350 441 80112 )
Discontinued / End-of-life74HCT9046AD 74HCT9046AD Standard Procedure Standard Procedure
Bulk Pack
( 9350 441 80118 )
Discontinued / End-of-life74HCT9046AD 74HCT9046AD Standard Procedure Standard ProcedureReel 13" Q1/T1

Discontinuation information

Type numberOrderable part numberOrdering codeLast time buy dateLast time delivery dateReplacement productStatusComments
74HCT9046AD74HCT9046AD,1129350441801122021-06-302021-12-31No replacementFull withdrawal
74HCT9046AD74HCT9046AD,1189350441801182021-06-302021-12-31No replacementFull withdrawal

Quality, reliability & chemical content

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
74HCT9046APLL with band gap controlled VCOData sheet2020-03-20
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08


If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.