Re: LF: RAM Upgrade


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Re: LF: RAM Upgrade



At 12:50 AM 11/21/96 +0000, you wrote:
>> >You need a TC551001BTRL-85L 128k x 8 SRAM chip made by Toshiba.  If they
>> >don't have that a TC551001BTRI-85L should work.  I don't know, actually, if
>> >either of these will work since I haven't actually tried it yet.  The
>> >...BTRL should almost definitely work, and the only difference ( that I
>> >could find ) in the BTRI is a larger tollerance to heat so it should
work too.
>
>Is the socket in the TI-92 a regular socket for a DIP or is it a 
>surface mount socket (series of pads) for a SOP?
>
>-Ed


It is surface mount, with the pins congigured like this:




        ____________________________________________________________
      -| 16                                                      17 |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|                                                            |-
      -|_1_______________________________________________________32_|-
      
It is the reverse of the chip on the main board.  Get the data sheet in pdf
form from:
http://www.toshiba.com/taec/components/category/StaticRAM-StandardSRAM5V.shtml


Bill Stysiack
wjs12@cornell.edu


References: