Chip

carlmart · 24th June 2003, 09:58 PM

I am looking for the SFC2458 datasheet.

It's a low noise dual chip, but I don't know who makes it.

Does anyone know it?

Carlos

raindog · 24th June 2003, 10:59 PM

the equivalent is mc1458; do a google for this one and you will find datasheets

JOE DIRT® · 24th June 2003, 11:05 PM

mc1458 is a quad 741 op amp

raindog · 24th June 2003, 11:09 PM

nope joe, it's a dual opamp (do a google search and you'll see)

JOE DIRT® · 25th June 2003, 04:07 AM

I haven`t used any...always thought the 1458 was the quad....thanks for the incite.

DIRT®

had to repost...never have USED THEM

peranders · 25th June 2003, 07:05 AM

Do anyone know the brand of this opamp? SFCxxxx Never heard of it before.

vbd · 25th June 2003, 08:02 AM

Hi,all
this chip is a VERY old Thomson or even older Sescosem version of the motorola 1458 dual 741... Back in the eighties....or seventies

Nothing exciting, I guess

BTW, they were manufactured here, in Grenoble, France...

carlmart · 25th June 2003, 01:38 PM

Quote:

Originally posted by peranders
Do anyone know the brand of this opamp? SFCxxxx Never heard of it before.

Sorry for not mentioning the application where this chip is used.

It's on an UREI mic preamp, battery powered, that came with an HP curve tracer.

It's old indeed, from '80 or '82.

Being an improved 1458 might be a logical suggestion. As I never used it I keep forgetting about it.

Carlos

24th June 2003, 09:58 PM	#1
carlmart diyAudio Member Join Date: Mar 2001 Location: Brazil	Chip I am looking for the SFC2458 datasheet. It's a low noise dual chip, but I don't know who makes it. Does anyone know it? Carlos

25th June 2003, 07:05 AM	#6
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Do anyone know the brand of this opamp? SFCxxxx Never heard of it before. __________________ /Per-Anders (my first name) or P-A as my friends call me

25th June 2003, 08:02 AM	#7
vbd diyAudio Member Join Date: Jan 2002 Location: Grenoble, France	Hi,all this chip is a VERY old Thomson or even older Sescosem version of the motorola 1458 dual 741... Back in the eighties....or seventies Nothing exciting, I guess BTW, they were manufactured here, in Grenoble, France... __________________ Denis

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24th June 2003, 10:59 PM	#2
raindog diyAudio Member Join Date: May 2003 Location: Timisoara	the equivalent is mc1458; do a google for this one and you will find datasheets

24th June 2003, 11:05 PM	#3
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	mc1458 is a quad 741 op amp

24th June 2003, 11:09 PM	#4
raindog diyAudio Member Join Date: May 2003 Location: Timisoara	nope joe, it's a dual opamp (do a google search and you'll see)

25th June 2003, 04:07 AM	#5
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	I haven`t used any...always thought the 1458 was the quad....thanks for the incite. DIRT® had to repost...never have USED THEM

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