449 mVHold SNMUNKNOWNInspect metric contract
279 mVRead SNMUNKNOWNInspect metric contract
37.9%Read margin lossUNKNOWNInspect metric contract
SIMULATION / GENERIC_6T_SRAM_SNM_001
SRAM static noise margin butterfly
SRAM SNM
Compare hold and read butterfly curves, maximum-square SNM, and read-access margin loss.
EXPLORE
Start with the observable.
Use this page when the simulation is the primary artifact. The linked lesson explains the concept; the linked lab keeps the visual replay surface available.
- Overlay hold and read butterfly curves before reading the SNM values.
- Find the limiting square that fits between the mirrored inverter curves.
- Use the read case to explain why access strength can reduce stability.
RUN CARD
Conditions before conclusions.
The page replays a saved generic SNM dataset; no arbitrary netlists run on the server.
Primary knobs
- Condition: hold versus read access
- Supply: 1.0 V teaching model
- DC samples: 1,001 points per condition
- Metric: maximum fitted square
Saved outputs
- hold butterfly
- read butterfly
- SNM values
- read-margin reduction
EXPORT
Download the public artifacts.
These exports are the supported public files for review. PDK files and restricted third-party material are not redistributed.
Dataset JSON
/data/generic-6t-snm-web-v1.json
Open file ->Hold netlist
/data/generic-6t-snm-hold.cir
Open file ->Read netlist
/data/generic-6t-snm-read.cir
Open file ->METHODS
How the number was made.
Methods are written for citation discipline: the extraction rule matters as much as the plotted value.
Mirror one inverter curve against the other to form the butterfly plot.
Keep this method attached when reusing the figure or metric.
Fit the largest square inside the limiting lobes for hold and read cases.
Keep this method attached when reusing the figure or metric.
Report read SNM separately from hold SNM so access loading remains explicit.
Keep this method attached when reusing the figure or metric.
LIMITS
What this page does not claim.
The MVP is useful because the limits are visible. These statements prevent a teaching simulation from being cited as silicon evidence.
Generic Level-1 model only; not a SKY130 signoff bitcell characterization.
Carry this boundary into any derivative note, paper draft, or slide.
Static SNM is not the same as dynamic write success, read delay, or Vmin.
Carry this boundary into any derivative note, paper draft, or slide.
No mismatch, PVT, extracted parasitics, half-select, or sense amplifier is included.
Carry this boundary into any derivative note, paper draft, or slide.
EVIDENCE
Trace the claim back to artifacts.
The evidence route remains the catalog-level browser; this page is the simulation-level reading card.
The dataset preserves 1,001 samples per condition.
GENERIC_6T_SRAM_SNM_001
Hold and read conditions remain separated in the public payload.
GENERIC_6T_SRAM_SNM_001
The linked lab keeps the butterfly visualization available for review.
GENERIC_6T_SRAM_SNM_001
Public execution boundary
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