Hi Noel,
I have made some trials. My experiments suggest the 'HC/HCT4046A VCO internal logic follows exactly the logic shown in SCHA002A TI document for the original Metal Gate CD4046 part (Fig. 8). So, it is normal to VCOout can stay both in H or L accoring…
Hi Met,
Would it be possible to attach a schematic of the CD74HC4046 or a block diagram of your test setup just to help me understand where the ripple is coming from?
It looks like in the " Implementation of FSK Modulation and Demodulation using CD74HC4046A…
Part Number: CD74HC4046A hi all,
i am detecting phase shift between two signals feeding to COMMON IN and SIG in . i had issue where PC2out was dead . I solved issue by adding 2k /2k to 5v and gnd . i dont understand why it needs resistors their .
another…
Part Number: CD74HC4046A Other Parts Discussed in Thread: CDCE913 Hi,
CD74HC4046APWR is connected to CDCE913, and the circuit diagram is shown below. In most cases, the PC2out pin does not output and the output remains at a low level. Please help analyze…
Part Number: CD74HC4046A Other Parts Discussed in Thread: SN74LV4046A Hello,
I have a question about the data sheet(Data sheet acquired from Harris Semiconductor SCHS204J) of CD74HC4046A.
Regarding Phase Comparator 3 (PC3), Figure 7 of the data sheet…
Part Number: CD74HC4046A Other Parts Discussed in Thread: SN74LV4046A , CD4046B Hi team,
I'm looking to replace the HEF4046B with either the CD74HC4046A or SN74LV4046A. They seem to be pin-to-pin options, but there's a difference with regards to pin…
Part Number: CD74HC4046A Hi Team,
Our customer would like to know the minimum frequency range of CD74HC4046AM and if this device can support a frequency range of High Signal: 890Hz, Low Signal: 730 Hz.
I looked at the datasheet and found no minimum value…
Part Number: CD74HC4046A Other Parts Discussed in Thread: SN74LV4046A Hi team
I want to use the PLL-IC at 6.78MHz.
I purchased the CD74HC4046A, which can operate at 18MHz (when Vcc = 5V ) according to the "features" on the top page of the data sheet…
Part Number: CD74HC4046A Hello,
I'm hoping to find some clarification on Figure 4 of the component datasheet (shown below).
The figure lists the following equation as the characteristic equation of the Vdemout behavior:
VDEMOUT = VPC2OUT= (VCC/4π…
Part Number: CD74HC4046A Hi team,
We need to do 4x frequency circuit by CD74HC4046A, input range is 100Hz~500kHz, output is 400Hz to 2MHz, this is big frequency range, is it available for CD74HC4046A?
I know this may tough for CD74HC4046A, so would you help…