This listing has ended.

Posts to:
Posts to:

Details about  On-Semi MC100EL33 Freq Divider DC-4GHz ECL ÷4 Prescaler

See original listing
On-Semi MC100EL33 Freq Divider DC-4GHz ECL ÷4 Prescaler
Item Ended
13 May, 2012 10:43:24 BST
Free Royal Mail International Standard (Small Packets) | See details
See details about international postage here.  help icon for delivery - opens a layer
Item location:
Looe, Cornwall, United Kingdom


eBay item number:
Seller assumes all responsibility for this listing.
thgirW nahtanoJ
egattoC ebmooC
lliH daogerT
eooL-yb-nitraM .tS
modgniK detinU


Item specifics

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is ... Read moreabout the condition

On-Semi MC100EL33 ÷4 Frequency Divider DC..4GHz 5V ECL

On offer are a number of individually priced new (old stock) MC100EL33 ECL 4GHz frequency dividers by On-Semi (formerly Motorola) in cut tape.

If you want to measure or control frequencies beyond 50..100MHz, you'll need to use more specialist circuitry than the regular 74' series counters and flip-flops. These ECL dividers are an example, a dual flip-flop capable of toggling at microwave frequencies.

  • max toggle, 4.2GHz typical, 3.8GHz guaranteed.
  • 1pS jitter
  • rise/fall times ~220pS
  • prop delay 700pS
  • diff/single-ended/AC coupled input configurations
  • temperature compensation
  • 8 pin SOIC - easily hand soldered

These would complement many other prescalers (with inputs to around 1GHz) quadrupling their range. Alternatively they may be cascaded for overall  ÷16, ÷64 etc.

In Oct 2006, Silicon Chip magazine published a prescaler project by Jim Rowe which uses a similar configuration (with non-temp-comp 10K series brother, the MC10EL33 and an ERA-2SM).

It is online at and well worth a read. Jim describes the MC10EL33 as ...

".. first and most critical frequency divider and it's an MC10EL33 device from On-Semiconductor. This is an ECL divide-by-4 device with very impressive specifications. It can operate at input frequencies up to at least 3.8GHz and has a propagation delay of less than 800pS (picoseconds!). It even includes its own bias voltage source, (Vbb, pin 4) which is used to provide the correct bias for its two inputs (via the 2.2k resistors). It has complementary outputs, pins 7 & 6) which both need to be tied to ECL low logic level via termination resistors of close to 50 ohm. Here we use 56 Ohm resistors because this value is more readily available than 51 ohm."

Of course, there are many other applications beside frequency meters, such as synthesizers and clock generators. A chance here to pick up a few to play with ...

Part Information:

markingKEL33 . XAYB
package8 pin SOIC, 0.05" pitch

Price Reference:

From Farnell UK, £8.77 each + VAT, ie. over £10 each ... Available here at a more reasonable price, with FREE P&P worldwide.

About RFPlus

RFPlus is a hobbyist with far too many components, accumulated over years of experimentation and development work, mostly in Australia.

Now located in the Southwest of England, UK ... the fishing town of Looe to be more precise ... I'm hoping to make a serious effort to dispose of the bulk of my electronic parts collection ... too many projects, too little time ... <sigh>. It'll likely take a couple of years to work my way through, so if you're interested in 'The Art', particularly the RF side, please check back as there's a fair mix of both the utilitarian and the esoteric set to appear ...

I wish each and every one of you a fine year ahead in 2011 ... may your projects be successful with a minimum of unexpected smoke ... though of course if you ever need replacement parts you know someone to ask ;-)

For other info, visit my the 'About Me' page. If you're thinking of bidding/buying I'd ask that you visit that page at least once so you can read the 'Terms & Conditions' and a bit more about RFPlus.

Click on the links below for more info ...

Business seller information


Returns policy

Return policy details
In the unlikely event that the goods are faulty then of course you may return them for a refund or if possible a replacement (buyer's choice). If it's a 'change of mind' for unopened goods that's fine. Email me and we'll work it out. Please note, Distance Selling regulations require you to pay the postage to return the item(s) but that I refund your full original payment, including P&P.
Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item. Find out more about your rights as a buyer - opens in a new window or tab and exceptions - opens in a new window or tab.

Questions and answers about this item

No questions or answers have been posted about this item.


Submit bid

Time left:
Current bid:
(Approximately ##1##)
Import charges:
Your maximum bid:
Your maximum bid:
Please read the full listing. By clicking Confirm bid you commit to buy this item from the seller if you are the winning bidder. You will enter a binding contract.
By clicking Confirm bid, you are committing to buy this item from the seller if you are the winning bidder and have read and agree to the Global Shipping Programme terms and conditions - opens in a new window or tab. Import charges previously quoted are subject to change if you increase you maximum bid amount.
Resume bidding, if the page does not update immediately.
Submit bid
Review and confirm your bid
Bid confirmation
Free P&P
See item description
(Approximately ##1##)
(Enter ##1## or more)
(Enter more than ##1##)
Your maximum bid:
Increase maximum bid
Submit bid
Confirm bid
Increase maximum bid
Change bid
, you've been outbid. Don't let it get away - bid again.
, you're the highest bidder on this item. Hope you win it.
, you're the first bidder. Hope you win.
, you're currently the high bidder, but you're close to getting outbid.
, this auction is almost over and you're currently the high bidder.
, you're the high bidder, but the reserve price hasn't been met.
Please enter your bid again.
Please enter a valid number as the bid price.
Enter an amount that is equal or greater than the minimum bid required. This can be found under the bid entry box.
Maximum bids can't be lowered once they're submitted.
This seller requires the buyer to have a PayPal account to purchase this item. Get a PayPal account here .
Your bid is greater than or equal to the Buy it now price. We recommend you purchase this item via Buy it now. If you still wish to bid, you may do so below.
Time left:
Current bid:
(approximately ##1##)
Your maximum bid:
(approximately ##1##)
Increase your maximum bid:
By clicking 1 Click Bid, you are agreeing to buy this item from the seller if you're the winning bidder. Learn moreabout 1-click bid - opens in a new window or tab
(approximately ##1##)
Winning bid:
Starting bid:
Congratulations The auction has ended and you're the winner.
The auction has ended, but the reserve price was not met.
Sorry, the auction has ended and you were outbid.
Good news, you're the highest bidder.
Sorry, you've been outbid.
You're the highest bidder, but the reserve price has not been met.
Please enter a higher amount than the current bid.
Maximum bids cannot be lowered once submitted.
Please enter a valid number.