Name Description Units Default
Is Transport saturation current A 1e-16
Ibc Base-collector saturation current A Is
Ibe Base-emitter saturation current A Is
Bf Ideal maximum forward beta - 100
Nf Forward current emission coefficient - 1.
Vaf Forward Early voltage V Infin.
Ikf Corner for forward beta high current roll-off A Infin.
nk High current roll-off coefficient - .5
Ise B-E leakage saturation current A 0.
Ne B-E leakage emission coefficient - 1.5
Br Ideal maximum reverse beta - 1.
Nr Reverse current emission coefficient - 1.
Var Reverse Early voltage V Infin.
Ikr Corner for reverse beta high current roll-off A Infin.
Isc B-C leakage saturation current A 0
Nc B-C leakage emission coefficient - 2
Rb Zero-bias base resistance Ω 0
Irb Current where base resistance falls halfway to its min value A Infin.
Rbm Minimum base resistance at high currents Ω Rb
Re Emitter resistance Ω 0.
Rc Collector resistance Ω 0.
Cje B-E zero-bias depletion capacitance F 0.
Vje B-E built-in potential V 0.75
Mje B-E junction exponential factor - 0.33
Tf Ideal forward transit time sec 0.
Xtf Coefficient for bias dependence of Tf - 0.
Vtf Voltage describing Vbc dependence of Tf V Infin.
Itf High-current parameter for effect on Tf A 0.
Ptf Excess phase at freq=1/(Tf*2*Ω)Hz ° 0.
Cjc B-C zero-bias depletion capacitance F 0.
Vjc B-C built-in potential V 0.75
Mjc B-C junction exponential factor - 0.33
Xcjc Fraction of B-C depletion capacitance connected to internal base node - 1.
Xcjc2 Fraction of B-C depletion capacitance connected between internal base node and extrinsic collector - 0
extsub Extrinsicness of more intrinsic collector node used for substrate capacitance charge division - 0
Tr Ideal reverse transit time sec 0.
Cjs Zero-bias collector-substrate capacitance F 0.
Xcjs Fraction of Cjs connected internally to Rc F 0.
Vjs Substrate junction built-in potential V 0.75
Mjs Substrate junction exponential factor - 0.
Xtb Forward and reverse beta temperature exponent - 0.
Eg Energy gap for temperature effect on Is eV 1.11
Xti Temperature exponent for effect on Is - 3.
Kf Flicker-noise coefficient - 0.
Af Flicker-noise exponent - 1.
Fc Coefficient for forward-bias depletion capacitance formula - 0.5
subs Geometry selector if LPNP is not used: 1 means vertical 2 means lateral - NPN: 1
PNP: 2
BVcbo Collector-base breakdown voltage - Infin.
nBVcbo Collector-base breakdown voltage coefficient - 5
BVbe Base-emitter breakdown voltage V Infin.
Ibvbe Current at base-emitter breakdown voltage A 1e-10
nbvbe Base-emitter breakdown coefficient - 1.
Tnom Parameter measurement temperature °C 27
Cn Quasi-saturation temperature coefficient for hole mobility 2.42 NPN
2.2 PNP
D Quasi-saturation temperature coefficient for scattering-limited hole carrier velocity .87 NPN
.52 PNP
Gamma Epitaxial region doping factor 1e-11
Qco Epitaxial region charge factor Coul 0.
Quasimod Quasi-saturation flag for temperature dependence - (not set)
Rco Epitaxial region resistance Ω 0.
Vg Quasi-saturation extrapolated bandgap voltage at 0°K V 1.206
Vo Carrier mobility knee voltage V 10.
Tre1 Re linear temperature coefficient 1/°C 0.
Tre2 Re quadratic temperature coefficient 1/°C2 0.
Trb1 Rb linear temperature coefficient 1/°C 0.
Trb2 Rb quadratic temperature coefficient 1/°C2 0.
Trc1 Rc linear temperature coefficient 1/°C 0.
Trc2 Rc quadratic temperature coefficient 1/°C2 0.
Trm1 Rmb linear temperature coefficient 1/°C 0.
Trm2 Rmb quadratic temperature coefficient 1/°C2 0.
Iss Substrate junction saturation current A 0.
Ns Substrate junction emission Coefficient - 1.
Tvaf1 Vaf linear temperature coefficient 1/°C 0.
Tvaf2 Vaf quadratic temperature coefficient 1/°C2 0.
Tvar1 Var linear temperature coefficient 1/°C 0.
Tvar2 Var quadratic temperature coefficient 1/°C2 0.
Tikf1 Ikf linear temperature coefficient 1/°C 0.
Tikf2 Ikf quadratic temperature coefficient 1/°C2 0.
Trbm1 Rbm linear temperature coefficient 1/°C 0.
Trbm2 Rbm quadratic temperature coefficient 1/°C2 0.
Tbvcbo1 BVcbo linear temperature coefficient 1/°C 0.
Tbvcbo2 BVcbo quadratic temperature coefficient 1/°C2 0.
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