Post by thread:[EE] High Speed cmos AND gate

I need a higher speed version of a CD4073, which is 3 AND gates, each having 3 inputs. Or, I need an 8 input AND gate. I can't find the 8 input AND gate, so I think I will need to use the CD4073 to make an equivalent multi-input AND gate. IF I could find a higher speed version of the CD4073, I'd be a happy camper. It has to work at 15 MHz, so the standard 4000 series gates won't work, especially at 5 volts Vcc. I searched for HCT, HC, and other variants that might be faster, but I can't find anyone who makes a chip other than the basic 4000 series family. Any suggestions for a vendor or an alternative chip? It has to be cmos for low power battery operation and I need a one chip solution since I don't have other gates available in the design. Thanks, Art -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.6/111 - Release Date: 9/23/2005

On Sun, 2005-09-25 at 13:23 -0400, KY1K wrote: > I need a higher speed version of a CD4073, which is 3 AND gates, each > having 3 inputs. Or, I need an 8 input AND gate. I can't find the 8 > input AND gate, so I think I will need to use the CD4073 to make an > equivalent multi-input AND gate. > > IF I could find a higher speed version of the CD4073, I'd be a happy camper. > > It has to work at 15 MHz, so the standard 4000 series gates won't > work, especially at 5 volts Vcc. > > I searched for HCT, HC, and other variants that might be faster, but > I can't find anyone who makes a chip other than the basic 4000 series family. > > Any suggestions for a vendor or an alternative chip? > > It has to be cmos for low power battery operation and I need a one > chip solution since I don't have other gates available in the design. Check out the cool runner series of CPLDs from Xilinx, should do what you want. TTYL ----------------------------- Herbert's PIC Stuff: http://repatch.dyndns.org:8383/pic_stuff/

And what's wrong with a 74HC11 or that kind? KY1K wrote: {Quote hidden}> I need a higher speed version of a CD4073, which is 3 AND gates, each > having 3 inputs. Or, I need an 8 input AND gate. I can't find the 8 > input AND gate, so I think I will need to use the CD4073 to make an > equivalent multi-input AND gate. > > IF I could find a higher speed version of the CD4073, I'd be a happy > camper. > > It has to work at 15 MHz, so the standard 4000 series gates won't > work, especially at 5 volts Vcc. > > I searched for HCT, HC, and other variants that might be faster, but I > can't find anyone who makes a chip other than the basic 4000 series > family. > > Any suggestions for a vendor or an alternative chip? > > It has to be cmos for low power battery operation and I need a one > chip solution since I don't have other gates available in the design. > > Thanks, > > Art > > -- * | __O Thomas C. Sefranek spam_OUTWA1RHPTakeThisOuTARRL.net |_-\<,_ Amateur Radio Operator: WA1RHP (*)/ (*) Bicycle mobile on 145.41, 448.625 MHz hamradio.cmcorp.com/inventory/Inventory.html http://www.harvardrepeater.org

The HC11 is a flip flop. I did find a 74HC20, but they aren't very common (only 1 vendor makes it in an HC version). Thanks, Art At 05:10 PM 9/25/2005, you wrote: {Quote hidden}>And what's wrong with a 74HC11 or that kind? > >KY1K wrote: > >>I need a higher speed version of a CD4073, which is 3 AND gates, >>each having 3 inputs. Or, I need an 8 input AND gate. I can't find >>the 8 input AND gate, so I think I will need to use the CD4073 to >>make an equivalent multi-input AND gate. >> >>IF I could find a higher speed version of the CD4073, I'd be a happy camper. >> >>It has to work at 15 MHz, so the standard 4000 series gates won't >>work, especially at 5 volts Vcc. >> >>I searched for HCT, HC, and other variants that might be faster, >>but I can't find anyone who makes a chip other than the basic 4000 >>series family. >> >>Any suggestions for a vendor or an alternative chip? >> >>It has to be cmos for low power battery operation and I need a one >>chip solution since I don't have other gates available in the design. >> >>Thanks, >> >>Art >> > >-- > * > | __O Thomas C. Sefranek .....WA1RHPKILLspam@spam@ARRL.net > |_-\<,_ Amateur Radio Operator: WA1RHP > (*)/ (*) Bicycle mobile on 145.41, 448.625 MHz > >hamradio.cmcorp.com/inventory/Inventory.html >http://www.harvardrepeater.org > > >

On 9/25/05, KY1K <ky1kKILLspampivot.net> wrote: > The HC11 is a flip flop. Wrong. > I did find a 74HC20, but they aren't very common (only 1 vendor makes > it in an HC version). > Digi-Key sells 74HC30's from Philips and TI. Regards, Mark markrages@gmail -- You think that it is a secret, but it never has been one. - fortune cookie

At 08:09 PM 9/25/2005 -0400, you wrote: >The HC11 is a flip flop. Maybe you're thinking of the HC112 (?) 74HC11 etc. If you do a parametric search at TI you end up with ones like this one: http://focus.ti.com/lit/ds/symlink/sn74ac11.pdf Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" .....speffKILLspam.....interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com

KY1K wrote: > The HC11 is a flip flop. Hasn't been for the last 30 years! And I rather doubt that the industry would change this standard part. You need to re-check your information. The 10 is a NAND the 11 is an AND The 20 is a NAND the 21 is an AND the 30 is... ETc Feel free to check my inventory for the real information: http://hamradio.cmcorp.com/inventory/LOGIC/TTL.html Tom -- * | __O Thomas C. Sefranek EraseMEWA1RHPspam_OUTTakeThisOuTARRL.net |_-\<,_ Amateur Radio Operator: WA1RHP (*)/ (*) Bicycle mobile on 145.41, 448.625 MHz hamradio.cmcorp.com/inventory/Inventory.html http://www.harvardrepeater.org