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quiz:3h7e0f4_pinout_data [2016/01/03 04:19]
mcmaster created
quiz:3h7e0f4_pinout_data [2016/01/03 04:27] (current)
mcmaster
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     * Detail     * Detail
       * {{:quiz:metal_gate_cmos:pinout_q.jpg?600|}}       * {{:quiz:metal_gate_cmos:pinout_q.jpg?600|}}
-      * Delayering showed this to be a metal chip with no poly (hint: CD4000 series metal gate) +      * Delayering showed this to be a basic logic 1 metal chip with poly 
-      * Hint: you need the padframe and some knowledge of CD4000 to make this easy+      * Hint: think CD4000 compatible.  Are there standard pinouts?
     - Pin A     - Pin A
     - Pin B     - Pin B
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     * [3]     * [3]
     * (1)     * (1)
-    * You should be able to narrow it to pin C or E without too much trouble as they are the only ones that spider out all over the chip.  Metal gate chips are exceedingly rare and usually only show up as CD4000.  Combined with this being a very simple chip it makes it a good bet.  Assuming that, most CD4000 chips put VDD as the highest numbered pin and VSS as the pin opposite.  In our chip we have power pins at pin 7 and 14 which matches this.  Therefore, pin 14 is VDD.+    * You should be able to narrow it to pin C or E without too much trouble as they are the only ones that spider out all over the chip.  A lot of chips like this are either 7400 or CD4000 compatible.  Combined with this being a very simple chip it makes it a good bet.  Assuming that, most CD4000 chips put VDD as the highest numbered pin and VSS as the pin opposite.  In our chip we have power pins at pin 7 and 14 which matches this.  Therefore, pin 14 is VDD.
       * {{:quiz:metal_gate_cmos:pinout_vdd_a.jpg?600|}}       * {{:quiz:metal_gate_cmos:pinout_vdd_a.jpg?600|}}
  
  
 
quiz/3h7e0f4_pinout_data.txt · Last modified: 2016/01/03 04:27 by mcmaster
 
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