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quiz:3h7e0f4_pinout_data [2016/01/02 23:19]
mcmaster created
quiz:3h7e0f4_pinout_data [2016/01/02 23:27] (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: 2016/01/02 23:27 by mcmaster
 
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