Model Parameter

Description

Unit

Default

LEVEL

1 selects the Level 1 BJT model

None

1 (default if LEVEL parameter is omitted)

BF (BFM)

Ideal maximum forward Beta

None

100.0

BR (BRM)

Ideal maximum reverse Beta

None

1.0

BULK (NSUB)

Global node name/number for bulk or substrate node.

None

0

DCAP

Selects equations used to calculate depletion capacitance

None

2

EXPLI

Current explosion factor

EXPLIeff = EXPLI ´ AREA

Amp

0.0

IBC

Reverse saturation current between base and collector.

IBCeff = IBC ´ AREA ´ M

Amp

0.0

IBE

Reverse saturation current between base and emitter.

IBEeff = IBE ´ AREA ´ M

Amp

0.0

IS

Transport saturation current. Used to calculate DC current when IBC and IBE are not specified.

ISeff = IS ´ AREA ´ M

Amp

1.0e-16

ISS

Reverse saturation current.
Vertical geometry: bulk-to collector. Lateral geometry: bulk-to substrate

Amp

0.0

NF

Forward current emission coefficient

None

1.0

NR

Reverse current emission coefficient

None

1.0

NS

Substrate current emission coefficient

None

1.0

SUBS

Selects geometry and corresponding substrate connection.

+1 = vertical geometry, substrate connected to internal collector

-1 = lateral geometry, substrate connected to internal base

None

+1 for NPN

-1 for PNP

UPDATE

Base charge equation selector

0 = default, 1 = alternate equation

None

0

Model Parameter

Description

Unit

Default

ISC (C4, JLC)

Base-collector leakage saturation current.

If ISC > 1e-4:

ISCeff = ISC ´ IS

If ISC < 1e-4 and SUBS = 1:

ISCeff = ISC ´ AREAB ´ M

If ISC < 1e-4 and SUBS = -1:

ISCeff = ISC ´ AREAC ´ M

Amp

0.0

ISE (C2, JLE)

Base-emitter leakage saturation current.

If ISC > 1e-4:

ISEeff = ISE ´ IS

If ISC < 1e-4:

ISEeff = ISE ´ AREA ´ M

Amp

0.0

NC (NLC)

Base-collector leakage emission coefficient

None

2.0

NE (NLE)

Base-emitter leakage emission coefficient

None

1.5

Model Parameter

Description

Unit

Default

VAF (VA, VBF)

Forward early voltage. Zero represents infinite voltage

Volt

0.0

VAR (VB, VRB, BV)

Reverse early voltage. Zero represents infinite voltage

Volt

0.0

Model Parameter

Description

Unit

Default

IKF (IK, JBF)

Knee or corner for forward Beta high-current rolloff. Zero represents infinite current.

IKFeff = IKF ´ AREA ´ M

Amp

0.0

IKR (JBR)

Knee or corner for reverse Beta high-current rolloff. Zero represents infinite current.

IKReff = IKR ´ AREA ´ M

Amp

0.0

NKF (NK)

High-current Beta rolloff exponent

None

0.5

Model Parameter

Description

Unit

Default

IRB (IOB)

Base current where base resistance falls halfway to RBM. Zero represents infinite current.

IRBeff = IRB ´ AREA ´ M

Amp

0.0

RB

Base resistance

RBeff = RB / (AREA ´ M)

Ohm

0.0

RBM

Minimum high-current base resistance

RBMeff = RBM / (AREA ´ M)

Ohm

RB

RC

Collector resistance

RCeff =RC / (AREA ´ M)

Ohm

0.0

RE

Emitter resistance

REeff =RE / (AREA ´ M)

Ohm

0.0

Model Parameter

Description

Unit

Default

CJC

Base-collector zero-bias depletion capacitance. When both IBC and IBE > 0 and SUBS = +1:

CJCeff = CJC ´ AREAB ´ M

When both IBC and IBE > 0 and SUBS = -1:

CJCeff = CJC ´ AREAC ´ M

Farad

0.0

CJE

Base-emitter zero-bias depletion capacitance.

CJCeff = CJC ´ AREA ´ M

Farad

0.0

CJS (CCS, CSUB)

Zero-bias collector-substrate capacitance. When both IBC and IBE > 0 and SUBS = +1:

CJSeff = CJS ´ AREAB ´ M

When both IBC and IBE > 0 and SUBS = -1:

CJSeff = CJS ´ AREAC ´ M

Farad

0.0

FC

Coefficient used in forward bias depletion capacitance calculation when DCAP = 1

None

0.5

MJC (MC)

Base-collector junction grading factor (exponent)

None

0.33

MJE (ME)

Base-emitter junction grading factor (exponent)

None

0.33

MJS (ESUB)

Substrate junction grading factor (exponent)

None

0.5

VJC (PC)

Built in base-collector potential

Volt

0.75

VJE (PE)

Built in base-emitter potential

Volt

0.75

VJS (PSUB)

Built in substrate junction potential

Volt

0.75

XCJC (CDIS)

Internal base fraction of base-collector depletion capacitance

None

1.0

Model Parameter

Description

Unit

Default

CBCP

External base-collector constant capacitance

CBCPeff = CBCP ´ AREA ´ M

Farad

0.0

CBEP

External base-emitter constant capacitance

CBEPeff = CBEP ´ AREA ´ M

Farad

0.0

CCSP

External collector-substrate constant capacitance (vertical) or base-substrate (lateral)

CCSPeff = CCSP ´ AREA ´ M

Farad

0.0

Model Parameter

Description

Unit

Default

ITF (JTF)

TF high-current parameter

ITFeff = ITF ´ AREA ´ M

Amp

0.0

PTF

Excess phase factor

Degree

0.0

TF

Ideal forward transit time

Second

0.0

TR

Ideal reverse transit time

Second

0.0

VTF

TF base-collector voltage dependence coefficient. Zero represents an infinite value.

Volt

0.0

XTF

TF bias dependence coefficient

None

0.0

Model Parameter

Description

Unit

Default

AF

Flicker noise exponent

None

1.0

KF

Flicker noise coefficient

None

0.0

Model Parameter

Description

Unit

Default

CTC

Zero-bias base-collector capacitance temperature coefficient (TLEVC > 0).

(°C)^-1

0.0

CTE

Zero-bias base-emitter capacitance temperature coefficient (TLEVC > 0).

(°C)^-1

0.0

CTS

Zero-bias substrate capacitance temperature coefficient (TLEVC > 0).

(°C)^-1

0.0

EG

PN junction energy gap

electron-Volt

TLEV = 0 or 1: 1.11

TLEV = 2: 1.16

GAP1

Band gap correction factor #1 (Sze alpha term)

electron-Volt/°C

7.02e-4

GAP2

Band gap correction factor #2 (Sze beta term)

None

1108

TBF1

1st-order temperature coefficient for BF

(°C)^-1

0.0

TBF2

2nd-order temperature coefficient for BF

(°C)^-2

0.0

TBR1

1st-order temperature coefficient for BR

(°C)^-1

0.0

TBR2

2nd-order temperature coefficient for BR

(°C)^-2

0.0

TIKF1

1st-order temperature coefficient for IKF

(°C)^-1

0.0

TIKF2

2nd-order temperature coefficient for IKF

(°C)^-2

0.0

TIKR1

1st-order temperature coefficient for IKR

(°C)^-1

0.0

TIKR2

2nd-order temperature coefficient for IKR

(°C)^-2

0.0

TIRB1

1st-order temperature coefficient for IRB

(°C)^-1

0.0

TIRB2

2nd-order temperature coefficient for IRB

(°C)^-2

0.0

TIS1

1st-order temperature coefficient for IS or IBE and IBC (TLEV = 3)

(°C)^-1

0.0

TIS2

2nd-order temperature coefficient for IS or IBE and IBC (TLEV = 3)

(°C)^-2

0.0

TISC1

1st-order temperature coefficient for ISC (TLEV = 3)

(°C)^-1

0.0

TISC2

2nd-order temperature coefficient for ISC (TLEV = 3)

(°C)^-2

0.0

TISE1

1st-order temperature coefficient for ISE (TLEV = 3)

(°C)^-1

0.0

TISE2

2nd-order temperature coefficient for ISE (TLEV = 3)

(°C)^-2

0.0

TISS1

1st-order temperature coefficient for ISS (TLEV = 3)

(°C)^-1

0.0

TISS2

2nd-order temperature coefficient for ISS (TLEV = 3)

(°C)^-2

0.0

TITF1

1st-order temperature coefficient for ITF

(°C)^-1

0.0

TITF2

2nd-order temperature coefficient for ITF

(°C)^-2

0.0

TLEV

Selector for temperature equations

None

0.0

TLEVC

Selector for temperature equations

None

0.0

TMJC1

1st-order temperature coefficient for MJC

(°C)^-1

0.0

TMJC2

2nd-order temperature coefficient for MJC

(°C)^-2

0.0

TMJE1

1st-order temperature coefficient for MJE

(°C)^-1

0.0

TMJE2

2nd-order temperature coefficient for MJE

(°C)^-2

0.0

TMJS1

1st-order temperature coefficient for MJS

(°C)^-1

0.0

TMJS2

2nd-order temperature coefficient for MJS

(°C)^-2

0.0

TNC1

1st-order temperature coefficient for NC

(°C)^-1

0.0

TNC2

2nd-order temperature coefficient for NC

(°C)^-2

0.0

TNE1

1st-order temperature coefficient for NE

(°C)^-1

0.0

TNE2

2nd-order temperature coefficient for NE

(°C)^-2

0.0

TNF1

1st-order temperature coefficient for NF

(°C)^-1

0.0

TNF2

2nd-order temperature coefficient for NF

(°C)^-2

0.0

TNOM (TREF)

Circuit temperature

°C

25

TNR1

1st-order temperature coefficient for NR

(°C)^-1

0.0

TNR2

2nd-order temperature coefficient for NR

(°C)^-2

0.0

TNS1

1st-order temperature coefficient for NS

(°C)^-1

0.0

TNS2

2nd-order temperature coefficient for NS

(°C)^-2

0.0

TRB1 (TRB)

1st-order temperature coefficient for RB

(°C)^-1

0.0

TRB2

2nd-order temperature coefficient for RB

(°C)^-2

0.0

TRC1 (TRC)

1st-order temperature coefficient for RC

(°C)^-1

0.0

TRC2

2nd-order temperature coefficient for RC

(°C)^-2

0.0

TRE1 (TRE)

1st-order temperature coefficient for RE

(°C)^-1

0.0

TRE2

2nd-order temperature coefficient for RE

(°C)^-2

0.0

TRM1

1st-order temperature coefficient for RBM

(°C)^-1

TRB1

TRM2

2nd-order temperature coefficient for RBM

(°C)^-2

TRB2

TTF1

1st-order temperature coefficient for TF

(°C)^-1

0.0

TTF2

2nd-order temperature coefficient for TF

(°C)^-2

0.0

TTR1

1st-order temperature coefficient for TR

(°C)^-1

0.0

TTR2

2nd-order temperature coefficient for TR

(°C)^-2

0.0

TVAF1

1st-order temperature coefficient for VAF

(°C)^-1

0.0

TVAF2

2nd-order temperature coefficient for VAF

(°C)^-2

0.0

TVAR1

1st-order temperature coefficient for VAR

(°C)^-1

0.0

TVAR2

2nd-order temperature coefficient for VAR

(°C)^-2

0.0

TVJC

Temperature coefficient for VJC (TLEVC = 1 or 2)

Volt/°C

0.0

TVJE

Temperature coefficient for VJE (TLEVC = 1 or 2)

Volt/°C

0.0

TVJS

Temperature coefficient for VJS (TLEVC = 1 or 2)

Volt/°C

0.0

XTB (TBT, CB, XBT)

Forward and reverse Beta temperature exponent (TLEV = 0, 1, or 2)

None

0.0

XTI

Saturation current temperature exponent

Silicon diffused junction: 3.0
Schottky barrier diode: 2.0

None

3.0