| Bipolar (PNP) |
| ------------- |
| |
| Spice Model Information |
| ~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| - Cell Name: :cell:`sky130_fd_pr_base__pnp4` |
| - Model Names: :model:`sky130_fd_pr_base__pnppar`, :model:`sky130_fd_pr_base__pnppar5x` |
| |
| Operating regime where SPICE models are valid |
| |
| - \|V\ :sub:`CE`\ \| = 0 to 5.0V |
| - \|V\ :sub:`BE`\ \| = 0 to 5.0V |
| - I\ :sub:`CE` = 0.01 to 10 µA/µm\ :sup:`2` |
| |
| Details |
| ~~~~~~~ |
| |
| The SKY130 process offer a “free” PNP device, which utilizes the substrate as the collector. This device is not independently optimized, and can be used in forward-active mode. The following sizes of PNP are available: |
| |
| - ungated device with emitter 0.68 x 0.68 (A=0.4624 µm\ :sup:`2`) |
| - ungated device with emitter 3.4 x 3.4 (A=11.56 µm\ :sup:`2`) |
| |
| Using this device must be done in conjunction with the correct guard rings, to avoid potential latchup issues with nearby circuitry. Reverse-active mode operation of the BJT’s are neither modeled nor permitted. |
| |
| E-test specs for these devices are shown in the table below: |
| |
| |
| .. include:: bipolar-pnp-table0.rst |
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| |
| |
| Symbols for the :model:`sky130_fd_pr_base__pnppar` is shown below |
| |
| |symbol-bipolar-a| |symbol-bipolar-b| |
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| The cross-section of the pnp is shown below. |
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| No deep n-well exists in this device; the collector is the substrate. |
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| |cross-section-bipolar| |
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| .. |symbol-bipolar-a| image:: symbol-bipolar-a.svg |
| .. |symbol-bipolar-b| image:: symbol-bipolar-b.svg |
| .. |cross-section-bipolar| image:: cross-section-bipolar.svg |
| |
