Hi
I'm almost finished designing my simple calculator but, I'm having a hard time finding an IC which can drive a 7 segment display and display hexadecimal letters besides the regular numbers.
I have already found one, the MC14495P Motorola MC14495P1 datasheet pdf, but it seems to be obsolete.
Can anyone help me find a similar IC?
you can show hex letters a,b,c,d,e,f in normal 7 segments
The poster is asking for a 4-bit to 7-segment decode chip.
Actually, I'm wrong, I think thats a multiplex driver - there is a MC14489B which looks capable - and Farnell stock it currently.
ULN 2803 will drive the 7 segment display... but you'll need 7 bits for that.
A lot of the more specialized "decoders" were eliminated when price points of standard programmable ROM chips hit below their prices. You could make up your own character generators with a ROM chip (assuming you could program it.) For example, you can get http://www.mouser.com/ProductDetail/Atmel/AT28C64B-15PU/?qs=sGAEpiMZZMuVhdAcoizlReMFKWGr4cDVH33Sgbep2as%3D which is a 16k EEPROM that has about 16000 more locations in it than you'd need, and is still only about $4. The less spectacular microcontroller chips are also capable of doing this, cheaper still...