12 Dec
2003
12 Dec
'03
7:26 p.m.
In message <m1AUwqq-000J2vC@p850ug1>
ard(a)p850ug1.demon.co.uk (Tony Duell) wrote:
According to Chipdir, the 75492 is a hex Darlington driver. I guess that's
about right for a calculator with an LED display.
"Everything you ever wanted to know about National Semiconductor's deep dark
past... as an LED manufacturer" :)
I like the HP HDSP-2202s though - cute, even if you have to do the scanning
manually.
Later.
--
Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem(a)dsl.pipex.com | ViewFinder, 10BaseT Ethernet, 2-slice,
http://www.philpem.dsl.pipex.com/ | 48xCD, ARCINv6c IDE, SCSI
Drive not ready: (A)bort, (R)etry, (F)ix with a hammer?
ITT / 492-5
/ 7445 - these appear to be LED drivers. I've never seen a part
How about a 75492? I think that's an LED driver? The 7445 part sounds
like a date code... old
logos. Did NatSemi ever make LED display panels?
Very much so! IIRC the display in the Science of Cambridge MK14 was an
NatSemi part (and was originally a calculator display). I've certainly
seen a NatSemi LED (and display) databook, I may have one somewhere.