[TenTec] Fwd: Why are so many dumping their OMNI VI Transceivers ????

[Dr. Gerald N. Johnson]

 From K1FK about the chips on the OMNI VI control board. He's dug deeper 
than I have. Some parts the makers do show as obsolete, but I have 
inquiries to TI and AD about the CODEC. Motorola PLL chips have often 
tended to come and go as Motorola invented new versions.

73, Jerry, K0CQ

-------- Original Message --------
Subject: 	[TenTec] Why are so many dumping their OMNI VI Transceivers ????
Date: 	Thu, 10 Feb 2011 14:19:06 -0800 (PST)
From: 	David Bowker <david.bowker at yahoo.com>
To: 	geraldj at weather.net



Jerry,
All of the IC's on the VI/VI+ logic board are readily available in
single unit quantities from reliable sources and at reasonable cost as
of 21/01/2011. U4 and U9 require TT programming ... all the rest are
easily "owner replaceable" components ... if one has the technical
knowledge and ability to troubleshoot the board and identify the
defective component.
Several years ago I compiled a list of the ICs on the logic board and
their availability from various major component suppliers. After the
recent (early Jan/2011) thread on the list (and the 'notion' that some
components are obsolete) I updated the table - see attached. Feel free
to share with the list --- I'm not a subscriber.
73, Dave, K1FK
Fort Kent, ME


------------------------------------------------------------------------
Be a PS3 game guru.
Get your game face on with the latest PS3 news and previews at Yahoo!
Games. <http://us.rd.yahoo.com/evt=49936/*http://videogames.yahoo.com>

His attachment unformatted.
> Sources for OMNI VI/VI+
> Logic Board Integrated Circuits
> Compiled by Dave Bowker, K1FK
> K1FK at arrl.net
> REF P/N FUNCTION MFR 					SUPPLIER
> U1  80C32 8 BIT uP  Maxim, Phillips, Siemens    Avnet, Newark, Arrow, Digi-Key
> U2 74HC573 Latch generic			Mouser, Digi-Key, Newark, Arrow
> U3 74HC138 Decoder ditto			 Avnet, Newark, Mouser, Digi-Key
> U4 27C256 EPROM Amtel, STM Microelect.	 Mouser, Digi-Key, Newark,
must be programmed.					Avnet, Future Electronics
> U5 6264LL SRAM Cypress Semi. Alliance Memory 		Jameco
> U6 DS1285 Real time clock Maxim, Dallas Semi         Q Components Portland, OR
Or replaced by DS12885 a current part GNJ
> U7 ADC0848 A-D Converter National Semi.		 Newark, Avnet, Arrow,
> 							Future Electronics
> U8 74HC573 Latch generic				 Mouser, Digi-Key, Newark,
> 							Arrow
> U9 27C64A EPROM Intel, STM Micro 			Newark, Avnet,
Must be programmed					Future Electronics
> U10 ADSP 2105 DSP processor Analog Devices 		Newark, Avnet, Arrow
> U11 TLC32041 CODEC Texas Instruments			Q Components Portland, OR
> U12 74HC74 D flip-flop generic 			 Mouser, Digi-Key, Avnet,
> 							Newark
> U13 MC145170 PLL synthesizer Motorola 		Q Components Portland, OR
> U14 MAX232 RS232 transceiver Maxim 			Mouser, Digi-Key, Avnet
> U15 74HC00 Quad NAND generic				Mouser, Digi-Key, Avnet,
> 							Newark
> U16 74HC00 Quad NAND generic				Mouser, Digi-Key, Avnet,
> 							Newark
> U17 MC14077B Quad EX NOR generic			Mouser, Avnet, Arrow
> U18 MC14077B Quad EX NOR generic 			Mouser, Avnet, Arrow
> U19 MC14093B Quad NAND generic			Mouser, Newark, Avnet,
> 							Future Electronics
> U20 82C55A Peripheral interface Intersil 		Newark, Avnet, Arrow
> U21 74HC154 4-16 decode/demux generic			Mouser, Newark, Digi-Key
> U22 ICL7660 High current driver Intersil		Mouser, Newark, Avnet


> 1 Suppliers which have stock of correct package configuration and available in single unit quantities as of
> revision date of this table. This is NOT an all exclusive list of suppliers.
> 2 Commonly available component from various manufacturers. I called these generic GNJ
> 3 Requires TenTec firmware load.
> Revised 21/01/2011