Need a couple of datasheets.

[Dazza]

Either one of then will be fine thanks.

(1) NEC IRELAND D8749HC

(2) DQ2817A-300

 

[hotwaterwizard2]

You need to specify Transistor IC Diode Ect

D8749H.pdf

 

[hotwaterwizard2]

DQ2817A-300 Manuf SEEQ

http://www.embeddedlinks.com/chipdir/giicm/2817.txt
http://www.atmel.com/dyn/resources/prod_documents/doc0542.pdf
2817
2kx8 EEPROM.
Not all manufacturers implement the RDY pin.

+-------------+
RDY |1 +-+ 28| VCC
|2 27| /WE
A7 |3 26|
A6 |4 25| A8
A5 |5 24| A9
A4 |6 23|
A3 |7 22| /OE
A2 |8 21| A10
A1 |9 20| /CE
A0 |10 19| D7
D0 |11 18| D6
D1 |12 17| D5
D2 |13 16| D4
GND |14 15| D3
+------------+

[This information is part of the GIICM]

 

[Dazza]

Thanks John .