Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.

Maximum low input (V)

Required number in V. Maximum input voltage still interpreted as logic low.

Maximum low output (V)

Required number in V. Maximum output voltage guaranteed for logic low.

Minimum high output (V)

Required number in V. Minimum output voltage guaranteed for logic high.

Minimum high input (V)

Required number in V. Minimum input voltage interpreted as logic high.

The cited overview of Semiconductor device supplies background for the terminology and domain context used by this tool.^[1]

Calculate the limiting static noise margin from the low and high input and output levels of an SRAM inverter voltage-transfer characteristic. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Low noise margin (V)

Returned number in V.

High noise margin (V)

Returned number in V.

Static noise margin (V)

Returned number in V. Smaller of the low and high static noise margins.

• Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Compare the estimate with measured process data, current device documentation, and a higher-fidelity circuit, field, thermal, quantum, or TCAD model when the decision requires it.

• Ballistic Mean Free Path Calculator

  Estimate the ballistic mean free path from low-field mobility using λ = (μ·Vt/vsat)·1e7 with thermal voltage Vt=0.02585 V (300 K) and saturation velocity vsat=1e7 cm/s (λ[nm]=μ·0.02585). Input mobility μ>0 cm²/V·s must be the low-field, non-degenerate value; rpm vs linear-velocity and per-area vs total distinctions do not apply. Model assumes Maxwell-Boltzmann statistics and constant vsat, valid only near 300 K as a quasi-ballistic estimate.

• Coulomb Blockade Voltage Calculator

  Compute the Coulomb-blockade voltage e over twice the total capacitance of an island. Formula: Vb [mV] = 80.108832 / C [fF] (since e/(2·C) with e=1.602176634e-19 C, 1 fF=1e-15 F, converted to mV). Input: C > 0 fF. Output: Vb > 0 mV. Assumes an isolated metallic island at zero temperature and that C is the total capacitance to all surroundings.

• Diode Ideality Factor Calculator

  Extract the diode ideality factor n from two forward-bias points on the exponential Shockley relation. Formula: n = (V2 - V1) / (Vt·ln(I2/I1)), where thermal voltage Vt = k·T/q (k=1.380649e-23 J/K, q=1.602176634e-19 C). Inputs: I1>0 mA, I2>0 mA and I1≠I2, V1 and V2 finite V, T>0 K (default 300 K). Output: n>0 (physical diode typically 1 ≤ n ≤ 2; n=1 ideal diffusion, n≈2 recombination/generation; n outside 1-2 indicates series resistance, high injection, or measurement error). Assumes forward exponential region, negligible series resistance, and constant temperature.