roland 4558 op amp data.

[houshu at dsp.cl.nec.co.jp]

Hello List,

> Date:    Sat, 13 Jan 2001 19:00:18 JST
> From:    ElmacacoX at aol.com
> 
> Hi,
> 
> it's me tring to see why the congas don't work on my cr8000,  and I am trying 
> to find the datasheet on the op amp IC marked 4558DD JRC 2424.  I've tried 
> searching with google, but no luck.  there are many 4558's in my sh-2 as 
> well, so it's a pretty common roland chip I imagine.
> 
> anyone have this?

You'll find the datasheet at:

http://www.njr.co.jp/index_e.htm

NJR is a subsidiary or related company of JRC.
"DD" means low noise selected type.  Other specs should be the same.
I don't know the internal circuit of CR8000, but if the 4558DD is used
as conga filters where they are with critically high Q, I'd use a 4558
without DD for replacement.

Regards,

- -- ---- ----------- --- --- - ----- -- --- --- - - ------ - - - --
 Osamu HOSHUYAMA                    NEC Corporation  Kawasaki JAPAN
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